CN-117146284-B - Heat exchanger capable of improving heat conversion rate

Abstract

The invention relates to the technical field of heat exchange, and provides a heat exchanger capable of improving heat conversion rate, which has reasonable structural design and can reduce heat energy waste, comprising a furnace liner and a furnace liner jacket, wherein the furnace liner is sequentially provided with an exhaust gas outlet, a heat exchange cavity, a dispersion cavity and a combustion port, the heat exchange cavity is provided with an exhaust gas inlet, the left port and the right port of the heat exchange cavity are respectively provided with a cut-off tube plate, a heat exchange tube is arranged between the two cut-off tube plates, a baffle structure is arranged in the heat exchange cavity, the furnace pipe jacket is closely sleeved on the furnace pipe, a supporting block is arranged between the furnace pipe and the furnace pipe jacket, a gas transmission channel is formed between the furnace pipe and the furnace pipe jacket, a vent hole is formed in the cavity of the rear end part of the heat exchange cavity, a connecting port is formed in the furnace pipe jacket, a distributing plate is arranged on the combustion port, a combustion space is formed between the distributing plate and the connecting port, a explosion venting structure is arranged at the position of the combustion space of the furnace pipe jacket, a dispersing structure is arranged in the dispersing cavity, and a moving structure is arranged at the lower end parts of the furnace pipe and the furnace pipe jacket.

Inventors

• SU MINGDE

Assignees

• 泉州市中天石油化工机械制造有限公司

Dates

Publication Date

20260505

Application Date

20230912

Claims (18)

1. 1. The utility model provides a heat exchanger that can improve heat conversion rate, includes the stove courage, sets up in the stove courage overcoat of stove courage outside, its characterized in that: the furnace is sequentially provided with an exhaust gas outlet for exhausting the combusted exhaust gas, a heat exchange cavity for exchanging heat of the combusted exhaust gas, a dispersing cavity for uniformly dispersing the combusted exhaust gas to the inner wall of the furnace so as to facilitate the furnace wall to absorb the heat of the exhaust gas, and a combustion port for penetrating the exhaust gas and combustion flame, the front surface of the outer wall of the left end part of the heat exchange cavity is provided with an exhaust gas inlet for allowing the exhaust gas to be combusted to enter, the left port and the right port of the heat exchange cavity are respectively provided with a shutoff tube plate for limiting the exhaust gas to diffuse to two ends, the two shutoff tube plates are correspondingly and uniformly provided with mounting holes, a plurality of heat exchange tubes for conveying the combusted exhaust gas in the dispersing cavity to the exhaust gas outlet through the heat exchange cavity are arranged between the two shutoff tube plates, the two ends of the heat exchange tube are respectively and closely inserted in the mounting holes, a flow gap for the flow of waste gas and the limitation of the flow quantity of the waste gas passing through is formed between the heat exchange tubes, so that the waste gas is attached to the heat exchange tube and uniformly passes through the flow gap for improving the heat exchange efficiency, a baffle structure for guiding the waste gas to be combusted to move along the direction of the vertical heat exchange tube and increasing the resistance of the waste gas in the movement process to prolong the contact time of the waste gas and the heat exchange tube is arranged in the heat exchange cavity, the furnace jacket is positioned on the furnace jacket in a sealing manner, a plurality of supporting blocks for keeping a fixed distance are arranged between the furnace jacket and the furnace jacket, a gas transmission channel is formed between the furnace jacket and the furnace jacket, a vent hole for the waste gas in the heat exchange cavity to enter the gas transmission channel between the outer wall of the furnace jacket and the furnace jacket is formed in the cavity at the rear end of the heat exchange cavity, the device comprises a furnace liner outer sleeve, a combustion port, a distribution plate, a plurality of groups of moving structures, a combustion space, a gas discharging structure and a gas discharging structure, wherein the connecting port is arranged on the right end face of the furnace liner outer sleeve and used for connecting an external combustor, the combustion port is provided with the distribution plate which is used for centralizing flame emitted by the combustor and fully burning waste gas, the combustion space is formed between the distribution plate and the connecting port, the upper end part of the furnace liner outer sleeve, which is positioned at the position of the combustion space, is provided with the explosion discharging structure which is used for automatically discharging pressure when the pressure in the furnace liner and the furnace liner outer sleeve is overlarge, the dispersing structure is arranged in a dispersing cavity and used for dispersing the waste gas which is centralizing and burnt, and the lower end parts of the furnace liner and the furnace liner outer sleeve are provided with a plurality of groups of moving structures which are convenient to move at intervals; the furnace pipe is characterized in that a connecting cone with the diameter gradually increasing from right to left is arranged on a right port of the heat exchange cavity, a left port of the connecting cone is fixedly connected with a cavity of the heat exchange cavity, a right port of the connecting cone is fixedly connected with a cavity of the dispersing cavity, a reducing section which is matched with the shape of the furnace pipe is arranged on a furnace pipe jacket at the position of the connecting cone, at least three guide plates are uniformly distributed on the inner wall of the furnace pipe jacket along the axial direction at the reducing section, and the outer sides of the guide plates are fixedly arranged on the inner wall of the furnace pipe jacket; The guide structure is a spiral guide plate which is spirally wound and fixedly arranged in the gas transmission channel.
2. 2. The heat exchanger capable of improving heat conversion rate according to claim 1, wherein the spiral guide plates are equally divided into eight sections, the distance between each section is 100-300mm, and eight sections of the spiral guide plates are wound on the outer wall of the furnace pipe for one circle.
3. 3. The heat exchanger capable of improving heat conversion rate according to claim 1 or 2, wherein an expansion structure capable of adaptively deforming and recovering to prevent explosion of the furnace when the air inlet pressure is too high is arranged on the cavity of the heat exchange cavity.
4. 4. The heat exchanger capable of improving heat conversion rate according to claim 3, wherein the expansion structure is a double-layer corrugated pipe, the cavity of the heat exchange cavity is divided into two sections between the waste gas inlet and the left end part of the furnace liner jacket, the double-layer corrugated pipe is arranged between the two sections of the cavities of the heat exchange cavity, and two ends of the double-layer corrugated pipe are respectively and closely fixed on the cavities of the heat exchange cavity.
5. 5. The heat exchanger capable of improving heat conversion rate according to claim 1 or 2, wherein the baffle structure comprises a plurality of semicircular baffle plates which are arranged at intervals between the waste gas inlet and the right end part of the heat exchange cavity, the arc-shaped side surfaces of the semicircular baffle plates are vertically and fixedly arranged on the upper inner wall or the lower inner wall of the heat exchange cavity, the plane side surfaces of the adjacent semicircular baffle plates are oppositely arranged, and through holes for the heat exchange tubes to vertically pass through are formed in the semicircular baffle plates.
6. 6. The heat exchanger capable of improving heat conversion rate according to claim 5, wherein the air holes comprise upper air holes which are uniformly formed in the rear end part of the upper cavity of the heat exchange cavity in a single row.
7. 7. The heat exchanger capable of increasing heat conversion rate according to claim 6, wherein the air hole further comprises a lower air hole formed in a right end opening of an inner wall below the heat exchange cavity, and the aperture of the upper air hole is smaller than that of the lower air hole.
8. 8. The heat exchanger capable of improving heat conversion rate according to claim 1 or 2, wherein the explosion venting structure comprises an explosion venting channel which is vertically arranged, an inclined explosion venting port is arranged at the upper end of the explosion venting channel, an end cover for closing the explosion venting port is arranged on the explosion venting port, the high side of the end cover is rotatably hinged to the explosion venting channel, the inclination angle of the end cover is 10-25 degrees, and a handle for manually opening and closing the end cover is arranged on the upper surface of the end cover.
9. 9. A heat exchanger capable of improving heat conversion rate according to claim 1 or 2, wherein an opening through which inner ring flames directly pass is formed in the middle of the distribution plate, through holes through which outer ring flames and waste gas pass are formed in the periphery of the distribution plate, guide holes through which flames and waste gas pass and guide plates I which guide the flames and waste gas passing through the guide holes to the middle are formed by cutting the distribution plate between the through holes and the opening, the outer sides of the guide plates I are fixedly arranged on the outer sides of the guide holes, and the inner sides of the guide plates I are folded for 40-50 degrees towards the dispersion cavity.
10. 10. A heat exchanger with improved heat conversion as claimed in claim 9 wherein the first guide plate has a turnover angle of 45 °.
11. 11. The heat exchanger capable of improving heat conversion rate according to claim 9, wherein the first guide holes and the first guide plates are isosceles trapezoids, and short sides of the isosceles trapezoids face to the middle of the distribution plate.
12. 12. The heat exchanger capable of improving heat conversion rate according to claim 1 or 2, wherein the dispersing structure comprises a first wind shielding ring and a second wind shielding ring which are sequentially arranged from right to left, the first wind shielding ring and the second wind shielding ring are respectively provided with a first wind shielding fan blade and a second wind shielding fan blade, the middle parts of the first wind shielding fan blade and the second wind shielding fan blade are convexly arranged on the first wind shielding ring and the second wind shielding ring towards the heat exchange cavity, the outer sides of the first wind shielding fan blade and the second wind shielding fan blade are fixedly arranged on the first wind shielding ring and the second wind shielding ring towards the heat exchange cavity, at least two first supporting plates and second supporting plates for fixing the wind shielding ring on the inner wall of the dispersing cavity are respectively arranged on the outer walls of the first wind shielding ring and the second wind shielding ring, one end of each first supporting plate is fixedly arranged on the first wind shielding ring, the other end of each second supporting plate is fixedly arranged on the second wind shielding ring, and the other end of each second supporting plate is fixedly arranged on the inner wall of the dispersing cavity, and the inclination angle of each first supporting plate and the second supporting plate is 40 degrees to 50 degrees, and the outer diameter of each first wind shielding fan blade is smaller than the outer diameter of each second fan blade.
13. 13. The heat exchanger capable of improving heat conversion rate according to claim 1 or 2, wherein the movable structure comprises a supporting seat, an arc-shaped groove attached to the outer wall of the furnace or the outer wall of the furnace jacket is formed in the upper end face of the supporting seat, a supporting shaft is arranged at the lower end of the supporting seat along the direction perpendicular to the central axis of the furnace, and rollers are respectively arranged at the two ends of the supporting shaft.
14. 14. The heat exchanger capable of improving heat conversion rate according to claim 1, wherein the heat insulation protection cover is arranged on the periphery of the furnace liner outer sleeve.
15. 15. The heat exchanger capable of improving heat conversion rate according to claim 1, wherein heat preservation cotton is filled and arranged on the right end face of the furnace liner outer sleeve and positioned at the periphery of the connecting port.
16. 16. The heat exchanger capable of improving heat conversion rate according to claim 1, wherein the supporting block is a U-shaped supporting block, and the bottom surface of the U-shaped supporting block is attached to the outer wall of the furnace.
17. 17. The heat exchanger capable of improving heat conversion rate according to claim 1, wherein an outlet cone with diameter gradually reduced from right to left is arranged on the left port of the heat exchange cavity on the furnace liner, an air outlet pipeline is arranged on the left port of the outlet cone, and the right end part of the outlet cone is fixedly connected with the cavity of the heat exchange cavity.
18. 18. The heat exchanger capable of improving heat conversion rate according to claim 1, wherein an air inlet pipeline is fixedly arranged on the front surface of the outer wall of the left end part of the heat exchange cavity, and the air outlet end of the air inlet pipeline is communicated with the inside of the heat exchange cavity.

Description

Heat exchanger capable of improving heat conversion rate Technical Field The invention relates to the technical field of heat exchange, in particular to a heat exchanger capable of improving heat conversion rate. Background In the process of treating waste gas, we generally burn the waste gas, convert the waste gas into pollution-free gas through combustion, and then discharge the pollution-free gas into the air. The burnt gas has a large amount of heat, and if the high-temperature air is directly discharged into the atmosphere, the heat energy is directly wasted, and a large amount of heat is also required in the waste gas combustion process. The waste heat recovery device can effectively recover the heat of the burnt gas to the waste gas to be burnt. Therefore, the heat is directly transferred, and the method is simpler, more convenient and lower in cost than the method for converting the heat into other energy. The burnt gas is conveyed through the heat exchange pipeline, the heat exchange pipeline is arranged to be a U-shaped pipeline or an S-shaped pipeline or a spiral pipeline in order to improve heat transfer efficiency, and the contact area between the waste gas and the heat exchange pipeline is increased by prolonging the length of the heat exchange pipeline. However, the movement direction of the waste gas is the same as the setting direction of the heat exchange tube, the waste gas can only move along the heat exchange tube, no resistance is influenced, the waste gas is unfavorable for uniformly contacting with the heat exchange tube, so that the waste gas near the heat exchange tube absorbs more heat, the waste gas far from the heat exchange tube absorbs less heat, and the heat transfer efficiency is not ideal. In order to increase the heat transfer efficiency of the exhaust gas, a heat exchanger is proposed that increases the heat transfer efficiency by changing the movement path of the exhaust gas. Disclosure of Invention Therefore, aiming at the problems, the invention provides the heat exchanger which has reasonable structural design and can reduce heat energy waste and improve the heat conversion rate. In order to solve the technical problems, the invention adopts the following solution: the heat exchanger capable of improving heat conversion rate comprises a furnace pipe and a furnace pipe jacket arranged outside the furnace pipe, wherein a waste gas outlet for discharging waste gas after combustion, a heat exchange cavity for exchanging heat of the waste gas after combustion, a dispersing cavity for uniformly dispersing the waste gas after combustion to the inner wall of the furnace pipe so as to facilitate the furnace wall to absorb the heat of the waste gas, and a combustion port for penetrating the waste gas and combustion flame are sequentially arranged on the furnace pipe from left to right, a waste gas inlet for allowing the waste gas to be combusted to enter is arranged on the front surface of the outer wall of the left end part of the heat exchange cavity, shutoff tube plates for limiting the diffusion of the waste gas to two ends are respectively arranged on the left port and the right port of the heat exchange cavity, mounting holes are correspondingly and uniformly formed on the two shutoff tube plates, a plurality of heat exchange pipes which are used for conveying combusted waste gas in the dispersion cavity to the waste gas outlet through the heat exchange cavity to realize heat exchange are arranged between the two intercepting pipe plates, two ends of each heat exchange pipe are respectively and closely inserted into the mounting holes, a flow gap which is used for allowing the waste gas to flow and limiting the flow quantity of the waste gas to pass through so that the waste gas is attached to the heat exchange pipes and uniformly passes through the heat exchange pipes to improve the heat exchange efficiency is formed between the heat exchange pipes, a baffle structure which is used for guiding the waste gas to be combusted to move along the direction of the vertical heat exchange pipes and increasing the resistance of the waste gas in the movement process to prolong the contact time of the waste gas and the heat exchange pipes is arranged in the heat exchange cavity, a furnace liner jacket is positioned on the furnace liner in a sealing manner, a plurality of support blocks which are used for keeping a fixed distance are arranged between the furnace liner and the furnace liner jacket, the gas-assisted stove is characterized in that a cavity at the rear end part of the heat exchange cavity is provided with a vent hole for the exhaust gas in the heat exchange cavity to enter a gas transmission channel between the outer wall of the stove inner and the stove inner jacket, the right end surface of the stove inner jacket is provided with a connecting port for connecting an external burner, a distribution plate for centralizing flame emitted by the burner and fully burning the