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CN-224215366-U - Solve high denitration equipment of ammonia escape in waste incineration factory flue gas

CN224215366UCN 224215366 UCN224215366 UCN 224215366UCN-224215366-U

Abstract

The utility model relates to a denitration device for solving the problem of secondary pollution caused by local escape elevation due to uneven mixing of ammonia and flue gas caused by poor mixing uniformity of the ammonia and the flue gas caused by direct feeding of ammonia into the flue gas in a waste incineration plant, and the denitration device comprises a mixing mechanism, wherein the mixing mechanism comprises a denitration pipe fixedly connected between the upper end and the lower end of an inner cavity of a denitration tower and denitration particles for flue gas denitration, the denitration pipe is provided with an ammonia pipe, the ammonia pipe is in S-shaped distribution, a plurality of air outlet holes are formed in the inner side of the ammonia pipe at equal intervals, and an air inlet pipe is communicated with the middle part of the top end of the ammonia pipe.

Inventors

  • GAO DAO
  • ZHU YEFEI
  • SHI WEIWEI
  • ZHANG JIANBO
  • ZHAO BO

Assignees

  • 江苏肯创催化剂再生技术有限公司

Dates

Publication Date
20260508
Application Date
20250509

Claims (7)

  1. 1. The utility model provides a solve denitration equipment that ammonia escape is high in waste incineration factory flue gas, its characterized in that includes: The mixing mechanism comprises a denitration pipe (35) fixedly connected between the upper end and the lower end of an inner cavity of the denitration tower (1) and denitration particles for flue gas denitration, wherein the denitration pipe (35) is provided with an ammonia pipe (33), the ammonia pipe (33) is in S-shaped distribution, a plurality of air outlet holes (34) are formed in the inner side of the ammonia pipe (33) at equal intervals, an air inlet pipe (3) is communicated with the middle part of the top end of the ammonia pipe (33), the air inlet pipe (3) penetrates through the denitration tower (1), and the joint of the air inlet pipe (3) and the denitration tower (1) is connected through a sealing bearing, so that the air inlet pipe (3) is in rotary connection with the denitration tower (1) and is sealed with the denitration tower (1); And the driving mechanism is used for driving the ammonia pipe (33) to rotate.
  2. 2. The denitration device for solving the problem of high ammonia escape in flue gas of a waste incineration plant according to claim 1, wherein the driving mechanism comprises a mounting frame (2) fixedly mounted at the top of a denitration tower (1), a driving motor (21) is fixedly mounted at the top of the inner side of the mounting frame (2), a driving gear (22) is mounted at the driving end of the driving motor (21), a driven gear (23) is fixedly mounted at the outer side of an air inlet pipe (3) above the denitration tower (1), and the driving gear (22) is meshed with the driven gear (23).
  3. 3. The denitration device for solving the problem of high ammonia escape in flue gas of a waste incineration plant according to claim 1, wherein a rotary joint (31) is installed at the top of the air inlet pipe (3), and the top of the air inlet pipe (3) is connected with the air inlet pipe (3) through a sealing bearing, so that the air inlet pipe (3) is in rotary connection with the rotary joint (31) and is sealed with the rotary joint (31), and a connecting pipe (32) is communicated with the top of the rotary joint (31).
  4. 4. A denitration device for solving the problem of high ammonia escape in flue gas of a waste incineration plant according to claim 1, wherein a spiral blade (5) is fixedly connected to the inside of the denitration pipe (35), and the ammonia pipe (33) is arranged in the middle of the spiral blade (5) and is not in contact with the spiral blade (5).
  5. 5. The denitration device for solving the problem of high ammonia escape in flue gas of a waste incineration plant according to claim 1, wherein a flue gas inlet pipe (11) is arranged at the lower side of one end of the denitration tower (1), an exhaust pipe (12) is arranged at the upper side of one end of the denitration tower (1) far away from the flue gas inlet pipe (11), one ends of the flue gas inlet pipe (11) and the exhaust pipe (12) close to the denitration tower (1) are connected with a denitration pipe (35) through the denitration tower (1), and the flue gas inlet pipe (11) and the exhaust pipe (12) are communicated with the inner cavity of the denitration pipe (35).
  6. 6. A denitration device for solving the problem of high ammonia escape in flue gas of a waste incineration plant according to claim 3 or 5, characterized in that an ammonia detector (4) is installed on the exhaust pipe (12), a detection head of the ammonia detector (4) penetrates through the exhaust pipe (12) and is arranged in an inner cavity of the exhaust pipe (12), and an electromagnetic valve (37) is installed in the connecting pipe (32).
  7. 7. The denitration device for solving the problem of high ammonia escape in flue gas of a waste incineration plant according to claim 1, wherein a filter screen (36) is fixedly arranged in the air outlet hole (34), and the size of the filter hole of the filter screen (36) is smaller than the size of denitration particles.

Description

Solve high denitration equipment of ammonia escape in waste incineration factory flue gas Technical Field The utility model relates to the field of flue gas denitration, in particular to denitration equipment for solving the problem of high ammonia escape in flue gas of a waste incineration plant. Background The garbage incineration power generation technology has obvious advantages of reduction, harmlessness and recycling in the field of household garbage treatment, traditional garbage treatment methods such as garbage landfill and the like are gradually replaced in recent years, the number and the treatment capacity of garbage incineration power generation facilities are widely applied in China, nitrogen Oxides (NOX) are one of main pollutants generated by garbage incineration and one of important reasons for forming photochemical smog and acid rain, if the pollution is not controlled and a large amount of the pollution is discharged, serious threat is caused to ecological environment and human health, and therefore an SCR flue gas denitration device is required to denitration flue gas generated by a garbage incinerator. When flue gas is denitrated, ammonia (NH 3) is required to be introduced for a Selective Catalytic Reduction (SCR) or selective non-catalytic reduction (SNCR) denitration process, and the key purpose is that nitrogen oxides (NOx) in the flue gas are converted into harmless nitrogen (N 2) and water (H 2 O) through chemical reaction, and the traditional method directly introduces the ammonia into the mixture with the flue gas, so that the mixing uniformity of the ammonia and the flue gas is poor, the partial escape is increased due to the uneven mixing of the ammonia and the flue gas, and secondary pollution is caused. For this reason, new solutions need to be designed to solve. Disclosure of utility model The utility model aims to overcome the defects of the prior art, adapt to the actual needs, and provide the denitration equipment for solving the problem that the ammonia escape in the flue gas of the garbage incineration plant is high, so as to solve the technical problem that the mixing uniformity of the ammonia and the flue gas is poor, the local escape is increased due to the uneven mixing of the ammonia and the flue gas, and secondary pollution is caused when the ammonia is directly introduced into the flue gas. In order to achieve the aim of the utility model, the technical scheme adopted by the utility model is to design a denitration device for solving the problem of high ammonia escape in the flue gas of a garbage incineration plant, which comprises the following steps: The mixing mechanism comprises a denitration pipe fixedly connected between the upper end and the lower end of the inner cavity of the denitration tower and denitration particles for flue gas denitration, the denitration pipe is provided with an ammonia pipe, the ammonia pipe is in S-shaped distribution, a plurality of air outlet holes are formed in the inner side of the ammonia pipe at equal intervals, the middle part of the top end of the ammonia pipe is communicated with an air inlet pipe, the air inlet pipe penetrates through the denitration tower, and the joint of the air inlet pipe and the denitration tower is connected through a sealing bearing, so that the air inlet pipe is sealed with the denitration tower while the air inlet pipe is rotationally connected with the denitration tower; And the driving mechanism is used for driving the ammonia pipe to rotate. Preferably, the driving mechanism comprises a mounting frame fixedly mounted at the top of the denitration tower, a driving motor is fixedly mounted at the top of the inner side of the mounting frame, a driving gear is mounted at the driving end of the driving motor, a driven gear is fixedly mounted at the outer side of an air inlet pipe above the denitration tower, and the driving gear is meshed with the driven gear. Preferably, rotary joint is installed at the top of intake pipe, and the top of intake pipe passes through sealed bearing and intake pipe connection for the intake pipe is realized sealedly with rotary joint when rotating with rotary joint to be connected, rotary joint's top intercommunication has the connecting pipe. Preferably, the inside fixedly connected with helical blade of denitration pipe, the ammonia pipe is arranged in helical blade's middle part, and does not contact with helical blade. Preferably, one end downside of denitration tower is provided with the flue gas and advances the pipe, the one end upside that the denitration tower kept away from the flue gas and advances the pipe is provided with the blast pipe, the flue gas advances pipe and the blast pipe is close to the one end of denitration tower and all runs through the denitration tower and be connected with the denitration pipe, and flue gas advances pipe and blast pipe all and the inner chamber intercommunication of denitration pipe. Preferably, an ammonia detector is