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CN-121993811-A - Flue gas waste heat recovery device for generator set

CN121993811ACN 121993811 ACN121993811 ACN 121993811ACN-121993811-A

Abstract

The invention discloses a flue gas waste heat recovery device for a generator set, which relates to the technical field of boiler flue gas waste heat recovery and comprises an exhaust pipe arranged on a coal-fired boiler, wherein a filtering module is communicated with the exhaust pipe, an outlet of the filtering module is communicated with a flue gas heat exchanger, the flue gas heat exchanger comprises a shell, an air inlet, an air outlet, a heat exchange pipe, a heat exchange medium outlet and a heat exchange medium inlet, the flue gas waste heat recovery device also comprises a cleaning mechanism, the cleaning mechanism is arranged in the shell and is used for cleaning condensed water on the surface of the heat exchange pipe, and the cleaning mechanism comprises a movable plate sleeved on the side wall of the heat exchange pipe. This kind of generating set is with flue gas waste heat recovery device is convenient for clear up the comdenstion water on heat exchange tube surface, guarantees flue gas waste heat recovery efficiency, is convenient for collect the comdenstion water of clearance, and convenient and fast more is convenient for change the sponge ring of clearance usefulness, and convenient and fast more to guarantee the effect of absorption clearance.

Inventors

  • SUN CONGLIN
  • XIAO ZHIQING
  • CHEN JIAN
  • WU ZHIQIANG
  • ZHANG LEI
  • LI ZHIPING
  • TONG JUNYU
  • HE GUOJUN
  • LI HONGWEI
  • ZHANG LEI
  • ZHANG LINGFENG
  • LI SHENG
  • JIN DONGXU
  • HUANG XING
  • ZHANG DEFENG

Assignees

  • 江西大唐国际新余第二发电有限责任公司

Dates

Publication Date
20260508
Application Date
20260317

Claims (10)

  1. 1. The utility model provides a flue gas waste heat recovery device for generating set, includes exhaust pipe (101) that sets up on coal fired boiler (1), and communicates on exhaust pipe (101) has filtration module (11), the export intercommunication of filtration module (11) has the flue gas heat exchanger, and the flue gas heat exchanger includes casing (1201) and heat exchange tube (1204), its characterized in that, flue gas waste heat recovery device still includes: The cleaning mechanism is arranged in the shell (1201) and is used for cleaning condensed water on the surface of the heat exchange tube (1204); The cleaning mechanism comprises a moving plate (1306) sleeved on the side wall of the heat exchange tube (1204), the moving plate (1306) is connected with the shell (1201) through a moving mechanism, the side wall of the moving plate (1306) is connected with a plurality of sponge rings (1301) through a mounting mechanism, a first notch (1302) is formed in the side wall of the sponge rings (1301), a plurality of through holes (1303) are formed in the side wall of the shell (1201), the moving ring (1304) is connected with the sliding ring (1304) in the through holes (1303), the moving ring (1304) is sleeved on the side wall of the heat exchange tube (1204), the end part of the moving ring (1304) is connected with a mounting ring (1305) through a telescopic mechanism, the mounting ring (1305) is detachably connected with the outer wall of the shell (1201), and a drainage mechanism is arranged at the end part of the moving ring (1305).
  2. 2. The flue gas waste heat recovery device for a generator set according to claim 1, wherein the drainage mechanism comprises a first drainage hole (201) formed in the end portion of the movable ring (1304), a second drainage hole (202) is formed in the end portion of the mounting ring (1305), the first drainage hole (201) is communicated with a fixed pipe (204), the fixed pipe (204) is communicated with the second drainage hole (202) through a telescopic pipe (203), an opening and closing assembly is arranged in the fixed pipe (204), and a collecting mechanism for collecting discharged condensed water is arranged on the outer wall of the shell (1201).
  3. 3. The flue gas waste heat recovery device for a generator set according to claim 2, wherein the collecting mechanism comprises a collecting box (901) fixedly connected to the outer wall of the shell (1201), a collecting pipe network (902) is communicated with the top of the collecting box (901), and the second drain hole (202) is communicated with the collecting pipe network (902) through a hose (903).
  4. 4. The flue gas waste heat recovery device for a generator set according to claim 2, wherein the opening and closing assembly comprises a first circular disc (401) fixedly connected in a fixed pipe (204), a plurality of first circular holes (402) are formed in the end portion of the first circular disc (401), a second circular disc (403) is connected in the fixed pipe (204) through a resetting assembly, a second circular hole (404) is formed in the end portion of the second circular disc (403), the second circular hole (404) and the first circular hole (402) are staggered, and movement of the second circular disc (403) is pushed through the pushing assembly.
  5. 5. The flue gas waste heat recovery device for a generator set according to claim 4, wherein the reset assembly comprises a fixed block (501) fixedly connected to the inner wall of the first drain hole (201), and the side wall of the fixed block (501) is connected with the second disc (403) through a spring telescopic rod (502).
  6. 6. The flue gas waste heat recovery device for a generator set according to claim 5, wherein the pushing assembly comprises a stop block (601) fixedly connected in the second drain hole (202), a pushing pin (602) is fixedly connected to the end portion of the second disc (403), and the pushing pin (602) penetrates through the first disc (401).
  7. 7. The flue gas waste heat recovery device for a generator set according to claim 2, wherein the telescopic mechanism is fixedly connected with two first loop bars (301) at the end part of the movable ring (1304), the side wall of each first loop bar (301) is sleeved with a first sleeve (302), the other end of each first sleeve (302) is fixed with the end part of the mounting ring (1305), and the first loop bars (301) are connected with the first sleeve (302) through springs.
  8. 8. The flue gas waste heat recovery device for a generator set according to claim 1, wherein the mounting mechanism comprises an annular groove (701) formed in the side wall of the movable plate (1306), a plastic ring (702) is fixedly connected to the end portion of the sponge ring (1301), a second notch (703) is formed in the side wall of the plastic ring (702), and the plastic ring (702) can be inserted into the annular groove (701).
  9. 9. The flue gas waste heat recovery device for a generator set according to claim 1, wherein the moving mechanism comprises a first mounting frame (801) fixedly connected to the side wall of the shell (1201), an air cylinder (802) is fixedly connected to the side wall of the first mounting frame (801), the air cylinder (802) comprises a piston rod (803), the other end of the piston rod (803) penetrates into the shell (1201) and is fixed with a moving plate (1306), and a guide assembly is arranged between the moving plate (1306) and the shell (1201).
  10. 10. The flue gas waste heat recovery device for a generator set according to claim 9, wherein the guide assembly comprises two second installation frames (1001) fixedly connected to the outer wall of the shell (1201), the side wall of each second installation frame (1001) is fixedly connected with a second sleeve (1002), a second sleeve rod (1003) is inserted into each second sleeve (1002), and the other end of each second sleeve rod (1003) penetrates into the shell (1201) and is fixed with the movable plate (1306).

Description

Flue gas waste heat recovery device for generator set Technical Field The invention relates to the technical field of boiler flue gas waste heat recovery, in particular to a flue gas waste heat recovery device for a generator set. Background In the thermal power field, a large amount of high-temperature flue gas can be generated when the coal-fired boiler of the energy-saving generator and the generator set runs, if the waste heat carried by the high-temperature flue gas is directly discharged, serious energy waste can be caused, and meanwhile, impurities such as dust in the high-temperature flue gas can also pollute the environment. At present, a flue gas heat exchanger is commonly adopted in the industry to recycle waste heat of flue gas of a coal-fired boiler, and cooling water is introduced into a heat exchange tube of the heat exchanger to exchange heat with high-temperature flue gas, so that the waste heat is recycled, and the aim of saving energy is fulfilled. However, in the practical application process, when the high-temperature flue gas is in contact with the heat exchange tube, condensed water is very easy to generate on the surface of the heat exchange tube. If the condensed water cannot be cleaned in time, the condensed water can be partially evaporated after absorbing heat, the evaporation process can consume the heat of the flue gas, so that the heat is wasted, meanwhile, a water film is formed on the surface of the heat exchange tube, the water film can obstruct the heat conduction between the flue gas and the heat exchange tube, the waste heat recovery efficiency is greatly reduced, in addition, the coal-fired flue gas contains acidic substances, the acidic substances can be dissolved in the condensed water to form acidic solution, the acidic solution can corrode the heat exchange tube, the shell and other metal parts, and the whole service life of the equipment is shortened. Therefore, we propose a flue gas waste heat recovery device for a generator set. Disclosure of Invention The invention aims to provide a flue gas waste heat recovery device for a generator set, which aims to solve the problems in the background technology. In order to achieve the above purpose, the invention provides the technical scheme that the flue gas waste heat recovery device for the generator set comprises an exhaust pipe arranged on a coal-fired boiler, wherein a filtering module is communicated with the exhaust pipe, an outlet of the filtering module is communicated with a flue gas heat exchanger, the flue gas heat exchanger comprises a shell, an air inlet, an air outlet, a heat exchange pipe, a heat exchange medium outlet and a heat exchange medium inlet, and the flue gas waste heat recovery device further comprises: The cleaning mechanism is arranged in the shell and is used for cleaning condensed water on the surface of the heat exchange tube; The cleaning mechanism comprises a movable plate sleeved on the side wall of the heat exchange tube, the movable plate is connected with the shell through the movable mechanism, the side wall of the movable plate is connected with a plurality of sponge rings through the mounting mechanism, a first notch is formed in the side wall of the sponge rings, a plurality of through holes are formed in the side wall of the shell, the movable rings are slidably connected with the movable rings in the through holes, the movable rings are sleeved on the side wall of the heat exchange tube, the end parts of the movable rings are connected with the mounting rings through the telescopic mechanism, the mounting rings are detachably connected with the outer wall of the shell, and the end parts of the movable rings are provided with the drainage mechanism. Preferably, the drainage mechanism comprises a first drainage hole formed in the end part of the movable ring, a second drainage hole is formed in the end part of the mounting ring, the first drainage hole is communicated with a fixed pipe, the fixed pipe is communicated with the second drainage hole through a telescopic pipe, an opening and closing assembly is arranged in the fixed pipe, and a collecting mechanism used for collecting discharged condensed water is arranged on the outer wall of the shell. Through adopting above-mentioned technical scheme, wait to clear up the back for the sponge ring removes in to the through-hole, when sponge ring offsets with the removal ring, can promote to remove along the through-hole the removal of removal ring, when waiting that the plastics ring removes to in the through-hole, when the movable plate removed, the sponge ring was extruded gradually, and, will open and close the subassembly and open, make the interior absorptive comdenstion water of sponge ring get into flexible pipe after being extruded through first wash port and opening and close the subassembly, then, get into collection mechanism through the second wash port and collect in. Preferably, the collecting mechanism comprises a co