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CN-120368282-B - Low nitrogen oxide combustion adjusting device of boiler car

CN120368282BCN 120368282 BCN120368282 BCN 120368282BCN-120368282-B

Abstract

The application discloses a low nitrogen oxide combustion adjusting device of a boiler car, which comprises a boiler main body and a smoke recycling module, wherein a combustor, a hearth and a flue are arranged in the boiler main body, the smoke recycling module comprises a first smoke pipeline, a second smoke pipeline and a boosting piston, one side of the first smoke pipeline is communicated with the flue, the second smoke pipeline is communicated with the combustor, a decompression module is arranged in the middle of the second smoke pipeline, the boosting piston comprises a piston cavity and an electric piston, one side of the piston cavity is communicated with the first smoke pipeline, one side of the piston cavity is not communicated with the first smoke pipeline is communicated with the second smoke pipeline, and a non-return valve is arranged in the middle of the electric piston.

Inventors

  • ZHONG YUXIANG
  • XU LIANG
  • LI CHUANTAO
  • YU XIONGLI

Assignees

  • 湖北一专汽车股份有限公司

Dates

Publication Date
20260508
Application Date
20250507

Claims (9)

  1. 1. The utility model provides a boiler car low nitrogen oxide burns adjusting device, includes boiler main part (1) and flue gas recirculation module (2), its characterized in that, be provided with combustor (101), furnace (102) and flue (103) in boiler main part (1), flue gas recirculation module (2) include first flue gas pipeline (201), second flue gas pipeline (202) and boost piston (203), one side of first flue gas pipeline (201) with flue (103) intercommunication, second flue gas pipeline (202) with combustor (101) intercommunication, second flue gas pipeline (202) middle part is provided with decompression module (204), boost piston (203) include piston cavity (205) and electric piston (206), one side of piston cavity (205) with first flue gas pipeline (201) intercommunication, piston cavity (205) do not with first flue gas pipeline (201) one side of intercommunication with second flue gas pipeline (202) are provided with reverse flow (207), electric piston (206) middle part is provided with reverse flow (207), gas valve (207) make only from second flue gas valve (201) reverse flow to flue gas valve (201); the pressure reducing module (204) comprises a shell (215), a sliding column (216) and a spring (217), wherein the sliding column (216) is connected with the pressure reducing module (204) through the spring (217), a pressure reducing pipeline (223) is arranged in the middle of the sliding column (216), the sliding column (216) is slidably connected with the shell (215), the pressure reducing pipeline (223) is horizontally arranged close to an opening at one side of the piston cavity (205), and the pressure reducing pipeline (223) is vertically arranged away from the opening at one side of the piston cavity (205); when the right side of the electric piston (206) is lower than the set pressure of the pressure reducing module (204), the electric piston (206) can continuously pressurize the right smoke, so that the smoke is continuously boosted, the boosted pressure condenses water vapor, and the water vapor is discharged to the combustor (101) through the second smoke pipeline (202) after being depressurized through the pressure reducing module (204).
  2. 2. The low nitrogen oxide combustion adjusting device of the boiler car according to claim 1, wherein a drainage pipeline (208) is arranged on one side of the piston cavity (205) close to the second flue gas pipeline (202), and a first drainage chamber (209) is arranged at the bottom of the drainage pipeline (208).
  3. 3. The low nitrogen oxide combustion adjusting device of a boiler car according to claim 2, characterized in that a groove (210) is arranged at the connection of the drain pipe (208) and the piston cavity (205).
  4. 4. A boiler car low nitrogen oxide combustion adjustment device according to claim 3, characterized in that the bottom of the first drain chamber (209) is provided with a first drain valve (211), said first drain valve (211) being arranged outside the boiler body (1).
  5. 5. The low nox combustion adjustment device for a boiler vehicle according to claim 4, wherein a first liquid level sensor (212) is provided in the first drain chamber (209).
  6. 6. The low nitrogen oxide combustion adjusting device of the boiler car according to claim 1, wherein a dust removing mechanism (213) and a flow air valve (214) are arranged at the joint of the first flue gas pipeline (201) and the flue (103).
  7. 7. The boiler car low nitrogen oxide combustion adjustment device according to claim 1, characterized in that a cooling coil (218) is arranged outside the first flue gas pipeline (201), a heating coil (219) is arranged outside the second flue gas pipeline (202), and the cooling coil (218) and the heating coil (219) are mutually communicated.
  8. 8. The low nitrogen oxide combustion adjusting device of a boiler car according to claim 7, wherein a second water draining chamber (220) is arranged on one side of the first flue gas pipeline (201), the second water draining chamber (220) is communicated with the first flue gas pipeline (201), a second water draining valve (221) is arranged at the bottom of the second water draining chamber (220), and the second water draining valve (221) is arranged outside the boiler main body (1).
  9. 9. The low nox combustion adjustment device of a boiler vehicle according to claim 8, wherein a second liquid level sensor (222) is provided in the second drain chamber (220).

Description

Low nitrogen oxide combustion adjusting device of boiler car Technical Field The invention relates to the technical field of boilers, in particular to a low-nitrogen oxide combustion adjusting device of a boiler car. Background The low nitrogen oxide combustion regulator for boiler truck is one core technology for reducing nitrogen oxide exhaust in industrial combustion system, and has optimized fuel-air mixing ratio, controlled combustion temperature, introduced recirculated fume and other measures to inhibit the reaction of nitrogen and oxygen to produce harmful gas at high temperature. With the improvement of environmental protection requirements, particularly the upgrading of emission control of mobile pollution sources, the traditional high-nitrogen combustion mode has difficulty in meeting the requirement of limiting the nitrogen oxides. In the field of mobile thermal equipment such as boiler trucks, the method is limited by space compactness and dynamic operation conditions, and the emission reduction technology of a combustion system needs to be compatible with high efficiency and reliability. The current mainstream low-nitrogen technology focuses on optimizing the combustion process, such as dividing a combustion area into an oxygen-poor main combustion area and an oxygen-rich afterburning area through staged combustion, reducing the flame core temperature to inhibit the generation of thermal nitrogen oxides, and simultaneously, combining with a flue gas recirculation technology, reintroducing part of tail gas into the combustion area, diluting the oxygen concentration by inert gas and absorbing heat to further block the nitrogen-oxygen free radical chain reaction. The technology can obviously reduce pollutant emission while guaranteeing the heat efficiency by regulating and controlling the combustion condition, and becomes an important direction for clean transformation of industrial boilers. However, in the flue gas recirculation technology, because the circulating flue gas often contains water vapor and acid gas which are not completely combusted, when the temperature of a recirculation path is lower than the dew point, the water vapor is easy to condense to form liquid drops, and long-term accumulation can erode the internal structures of the pipeline and the burner, so that the service life of equipment is reduced and the maintenance cost is increased. Therefore, the technical field of boilers needs to provide a boiler car low-nitrogen oxide combustion adjusting device which can reduce the damage of liquid drops to the device and reduce the maintenance cost. Disclosure of Invention Aiming at the prior art, the invention provides the low nitrogen oxide combustion adjusting device for the boiler car, which mainly solves the technical problem of reducing the damage of liquid drops to the device and reducing the maintenance cost. In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows: The utility model provides a boiler car low nitrogen oxide burning adjusting device, includes boiler main part and flue gas recirculation module, be provided with combustor, furnace and flue in the boiler main part, flue gas recirculation module includes first flue gas pipeline, second flue gas pipeline and pressure boost piston, one side of first flue gas pipeline with the flue communicates, the second flue gas pipeline with the combustor communicates, second flue gas pipeline middle part is provided with pressure reduction module, pressure boost piston includes piston cavity and electric piston, one side of piston cavity with first flue gas pipeline communicates, the piston cavity not with one side of first flue gas pipeline intercommunication with second flue gas pipeline communicates, electric piston's middle part is provided with the non-return valve, the non-return valve makes the flue gas only can follow first flue gas pipeline flow direction second flue gas pipeline. Preferably, a drainage pipeline is arranged on one side, close to the second flue gas pipe, of the piston cavity, and a first drainage chamber is arranged at the bottom of the drainage pipeline. Preferably, a groove is arranged at the joint of the drainage pipeline and the piston cavity. Preferably, a first drain valve is provided at the bottom of the first drain chamber, and the first drain valve is provided at the outside of the boiler body. Preferably, a first liquid level sensor is arranged in the first water discharge chamber. Preferably, a dust removing mechanism and a flow air valve are arranged at the joint of the first flue gas pipeline and the flue. Preferably, the pressure reducing module comprises a shell, a sliding column and a spring, wherein the sliding column is connected with the pressure reducing module through the spring, a pressure reducing pipeline is arranged in the middle of the sliding column, the sliding column is connected with the shell in a sliding mode, th