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CN-224215300-U - Flue type waste heat boiler

CN224215300UCN 224215300 UCN224215300 UCN 224215300UCN-224215300-U

Abstract

The utility model discloses a flue type waste heat boiler, which comprises a cyclone, a steam generator, a membrane type economizer and a hyperbolic ash bucket which are sequentially connected along the vertical direction; the cyclone is provided with a tangentially arranged air inlet pipe seat so as to convert the flow track of the high-temperature furnace gas into spiral rotation from top to bottom, and then the high-temperature furnace gas sequentially enters the steam generator and the membrane type economizer to carry out partition wall heat transfer and then is discharged; the explosion-proof device adopts the technologies of tangential air intake, heat transfer enhancement inside and outside a heating surface, a transition annular header, automatic positioning of cold and hot states, a ribbed serpentine tube bundle, a hyperbolic ash bucket and the like, and has an explosion-proof function; the product replaces the membrane tube water-cooled wall used by the prior art waste heat boiler, so that the steam generator can be integrally arranged in the flue, the heat of the furnace gas is fully absorbed, the section of the flue is smaller, the flow rate of the flue gas is improved, the volume of the product is about half of that of the prior art waste heat boiler with the same capacity, and the steam yield is as high as one time as that of the prior art waste heat boiler with the same capacity.

Inventors

  • CHEN ZEXIN

Assignees

  • 陈泽鑫

Dates

Publication Date
20260508
Application Date
20250529

Claims (6)

  1. 1. The flue type waste heat boiler comprises a cyclone (2), a steam generator (3), a membrane type economizer (5) and a hyperbolic ash bucket (7) which are sequentially connected in the vertical direction, and is characterized in that the cyclone (2) is provided with an air inlet pipe seat (2-1) which is tangentially arranged so as to convert the flow track of high-temperature furnace gas into spiral rotation from top to bottom, and the high-temperature furnace gas sequentially enters the steam generator (3) and the membrane type economizer (5) to perform partition wall heat transfer and then is discharged; The steam generator (3) comprises a cylinder body (3-2), wherein an upper header (3-5), a transition annular header (3-4) and a rising tube bundle (3-3) are arranged in the cylinder body (3-2), the upper header (3-5) is arranged at the upper part in the cylinder body (3-2), a cold and hot state automatic positioning device (6) is arranged on the outer wall of the cylinder body (3-2), a lower header (3-6) is arranged at the lower part of the cylinder body (3-2), the transition annular header (3-4) is arranged between the upper header (3-5) and the lower header (3-6), and the rising tube bundle (3-3) is connected between the upper header (3-5) and the transition annular header (3-4); A ribbed serpentine tube bundle (5-2) is suspended in a shell of the membrane type coal economizer (5), the upper end of the ribbed serpentine tube bundle (5-2) is connected with a water outlet header (5-3), the lower end of the ribbed serpentine tube bundle (5-2) is connected with a water inlet header (5-4), an air outlet tube seat is arranged on the side surface of the lower part of the membrane type coal economizer (5), and the bottom of the membrane type coal economizer is connected with a hyperbolic ash bucket (7); The top of the cyclone (2) is provided with an explosion venting valve (1).
  2. 2. The flue-type waste heat boiler according to claim 1, wherein an expansion ring (3-1) is arranged at the joint of the upper header (3-5) of the steam generator (3) and the cylinder (3-2).
  3. 3. The flue-type waste heat boiler of claim 1, wherein the cold-hot state automatic positioning device (6) comprises a centering block (6-1), a roller (6-2) and a base (6-3), the centering block (6-1) is welded on the outer side of the cylinder (3-2), and the roller (6-2) is connected with the base (6-3) through a pin shaft.
  4. 4. The flue-type waste heat boiler of claim 1, wherein the finned serpentine tube bundle (5-2) consists of serpentine tubes (5-2-1) and fins (5-2-2), wherein the fins (5-2-2) are fixed between the outer walls of two adjacent serpentine tubes (5-2-1), and the fins are welded with the serpentine tube walls to form an integral structure.
  5. 5. The flue type waste heat boiler as claimed in claim 1, wherein two explosion venting valves (1) are arranged at the top of the cyclone (2), and the opening and closing modes of the explosion venting valves (1) are heavy hammer type.
  6. 6. The flue type waste heat boiler as set forth in claim 1, wherein a shock wave soot blower (4) is arranged at the lower part of the cyclone (2), and 2 shock wave soot blowers (4) are arranged at the middle part of the membrane type economizer (5).

Description

Flue type waste heat boiler Technical Field The utility model relates to the technical field of waste heat boilers, and discloses a flue type waste heat boiler which is mainly suitable for waste heat recovery of waste furnace gas of an ore smelting furnace Gao Wenwei mainly comprising a calcium carbide furnace. Background The revised 'calcium carbide industry admission condition' of the industrial information department 2014 makes a rule that the furnace gas of the calcium carbide furnace must be recovered and comprehensively utilized to encourage the production of chemical products with high added value, and the new and reconstructed calcium carbide production device must recover and utilize sensible heat and waste heat under the condition of mature technology. The vertical round heat pipe waste heat boiler in the prior art has the advantages that the volume of a steam-water mixture is overlarge, heat pipe heat absorption sections are dense and are arranged in a radial shape, so that the smoke flow section is reduced, the accumulated ash bridging is serious, and the structure is difficult to change in the prior art of the vertical round heat pipe waste heat boiler. The vertical circular tube array waste heat boiler in the prior art has the advantages that the smoke flow is small, the flow section is large, the smoke scouring speed is too low, the heat transfer effect is poor, the membrane tube water cooling wall is used, the heat transfer effect of the membrane wall in the process of convection heat transfer is poor, and the structure is difficult to change in the prior art of the vertical circular tube array waste heat boiler. Although the waste heat boilers are put into operation, the waste heat boilers have quite small effect, high failure rate and low steam yield, and the operation data cannot reach the design parameters. Therefore, the development of the waste heat boiler with small flue gas amount, which is suitable for the production process of the calcium carbide furnace, has novel structure, less investment and short return period, is a subject to be overcome urgently in the technical field. Disclosure of Invention The utility model provides a flue type waste heat boiler aiming at the problems, the waste heat boiler adopts a novel technology such as a transition annular header box and the like, and further uses a ribbed pipe to replace a membrane pipe water-cooled wall used in the prior art, so that the flue gas scouring speed is high, the heat transfer effect is good, the heat of the flue gas is fully absorbed, the air tightness is stronger, and the section of a flue is smaller, therefore, the volume of the product is only half of that of the waste heat boiler in the prior art with the same capacity, and the steam yield is as high as one time as that of the waste heat boiler in the prior art with the same capacity. The flue type waste heat boiler is characterized in that the cyclone is provided with a tangential air inlet pipe seat so as to convert the flow track of high-temperature furnace gas into spiral rotation from top to bottom, and the high-temperature furnace gas sequentially enters the steam generator and the membrane type economizer to transfer heat through partition walls and then is discharged; The steam generator comprises a cylinder body, wherein an upper header, a transition annular header and an ascending tube bundle are arranged in the cylinder body, the upper header is arranged at the upper part in the cylinder body, and a cold and hot state automatic positioning device is arranged on the outer wall of the cylinder body; The top of the cyclone is provided with an explosion venting valve. As a further improvement of the utility model, an expansion ring is arranged at the joint of the upper header and the cylinder of the steam generator. As a further improvement of the utility model, the cold-hot state automatic positioning device comprises a centering block, a roller and a base, wherein the centering block is welded on the outer side of the cylinder body, and the roller is connected with the base through a pin shaft. As a further improvement of the utility model, the ribbed serpentine tube bundle consists of serpentine tubes and ribs, wherein the ribs are fixed between the outer walls of two adjacent serpentine tubes, and the ribs are welded with the serpentine tube walls to form an integral structure. As a further improvement of the utility model, two explosion venting valves are arranged at the top of the cyclone, and the opening and closing modes of the explosion venting valves are heavy weights. As a further improvement of the utility model, the lower part of the cyclone is provided with a shock wave soot blower, and the middle part of the membrane type economizer is provided with 2 shock wave soot blowers in total. Compared with the prior art, the utility model adopts new technologies such as a transition annular header and the like, and further replaces a membrane tube wate