CN-224214246-U - Engine fixed source tail gas treatment system

Abstract

The utility model discloses an engine fixed source tail gas treatment system which comprises a smoke return pipeline, wherein the smoke return pipeline starts from a smoke exhaust fan outlet and ends at a heater inlet pipeline, the position of the smoke exhaust fan outlet is marked as a point A, the position of the heater inlet pipeline is marked as a point D, a reflux quantity regulating valve is arranged on the smoke return pipeline, the position of the smoke return pipeline, which is positioned in front of the reflux quantity regulating valve, is marked as a point B, and the position, which is positioned behind the reflux quantity regulating valve, is marked as a point C. The utility model has the beneficial effects that the system effectively solves the problems of high preheating energy consumption, low working condition efficiency and incapability of purifying in the whole process of the traditional tail gas treatment system through the innovative design of the flue gas reflux, and has remarkable practical value and economic benefit.

Inventors

• PANG ZHONGBING
• NI MINJIE
• CHEN TIANYU
• ZHONG ZHANGPENG

Assignees

• 南通力达环保设备有限公司

Dates

Publication Date

20260508

Application Date

20250711

Claims (5)

1. 1. The tail gas treatment system of the engine (1) is characterized by comprising a smoke return pipeline, wherein the smoke return pipeline starts from an outlet of a smoke exhaust fan (5), ends at an inlet pipeline of a heater (2), marks the position of the outlet of the smoke exhaust fan (5) as a point A, marks the position of the inlet pipeline of the heater (2) as a point D, is provided with a reflux quantity regulating valve (3), marks the position in front of the reflux quantity regulating valve (3) as a point B, and marks the position behind the reflux quantity regulating valve (3) as a point C.
2. 2. The engine (1) fixed source exhaust gas treatment system according to claim 1, wherein the engine (1) fixed source exhaust gas treatment system further comprises an engine (1) exhaust gas treatment main path, and the main path is sequentially connected with the engine (1), the heater (2), the exhaust gas catalytic treatment unit (4), the exhaust fan (5) and the chimney (6).
3. 3. A stationary source exhaust gas treatment system of an engine (1) according to claim 1 or 2, characterized in that said reflux amount adjusting valve (3) is used for adjusting the circulation flow in the exhaust gas reflux line to control the heat transfer rate.
4. 4. A fixed source exhaust gas treatment system of an engine (1) according to claim 3, wherein when preheating the exhaust gas catalytic treatment unit (4), the exhaust fan (5) is operated to make the A point pressure higher than the D point pressure, and the circulation of A- & gt B- & gt C- & gt D- & gt A is formed by opening the reflux quantity regulating valve (3), so that the heat generated by the heater (2) is transferred to the exhaust gas catalytic treatment unit (4).
5. 5. The system for treating exhaust gas of a stationary source of an engine (1) as set forth in claim 4, wherein the amount of exhaust gas is compensated and the secondary treatment is performed by adjusting the opening angle of the reflux amount adjusting valve (3) when the engine (1) is operated under a low condition.

Description

Engine fixed source tail gas treatment system Technical Field The utility model relates to the technical field of tail gas treatment, in particular to an engine fixed source tail gas treatment system. Background The general treatment process of the engine fixed source tail gas treatment system is that engine tail gas- > heater- > tail gas catalytic treatment unit- > smoke exhaust fan- > chimney, the tail gas catalytic treatment unit can carry out tail gas purification treatment only at a temperature of more than 200 ℃, the heater can be prevented from being damaged due to local overtemperature due to the fact that gas flows in the tail gas catalytic treatment unit are needed when the heater is started, and the problems are solved in the prior art in a general mode, but the problems are overcome in the prior art, namely, the first mode is that the tail gas catalytic treatment unit is not preheated before the engine is operated, the heater is started, heat generated by the heater is brought into post-treatment equipment by utilizing engine smoke, and the mode can not realize the whole-course treatment of pollutants due to the fact that the tail gas catalytic treatment unit does not reach the working temperature at the beginning; the other is that a new air port is arranged on a pipeline at the front end of the front heater, ambient air is injected by means of an external fan or negative pressure in a pipe, the tail gas catalytic treatment unit is preheated before an engine test, and the heat of the heater is brought to the post-treatment equipment by means of the injected ambient air. In order to solve the problems, a new technical scheme is provided. Disclosure of utility model The utility model mainly solves the technical problem of providing an engine fixed source tail gas treatment system, which solves one or more of the problems in the prior art. The technical scheme is that the engine fixed source tail gas treatment system is characterized by comprising a smoke return pipeline, wherein the smoke return pipeline starts from a smoke exhaust fan outlet, ends at a heater inlet pipeline, marks the position of the smoke exhaust fan outlet as a point A, marks the position of the heater inlet pipeline as a point D, is provided with a reflux quantity regulating valve, marks the position in front of the reflux quantity regulating valve as a point B, and marks the position behind the reflux quantity regulating valve as a point C. In some embodiments, the engine fixed source exhaust treatment system further comprises an engine exhaust treatment main circuit, which is connected with the engine, the heater, the exhaust catalytic treatment unit, the smoke exhaust fan and the chimney in sequence. In some embodiments, a reflux quantity regulating valve is used to regulate the circulation flow in the flue gas reflux line to control the heat transfer rate. In some embodiments, when the exhaust gas catalytic treatment unit is preheated, the smoke exhaust fan is operated to enable the pressure at the point A to be higher than the pressure at the point D, and the circulation flow of A, B, C, D and A is formed by opening the reflux quantity regulating valve, so that heat generated by the heater is transferred to the exhaust gas catalytic treatment unit. In some embodiments, when the engine is operating in a low condition, the amount of smoke can be compensated and secondary treatment can be achieved by adjusting the opening angle of the reflux amount regulating valve. The system has the beneficial effects that the system realizes the full-stage efficient tail gas treatment of preheating and running through the synergistic effect of the smoke return pipeline and the main way, has the structural advantages that only one smoke return pipeline and a return flow regulating valve are needed to be added on the basis of the original main way, the system is simple in structure, small in occupied area and low in transformation cost, saves energy and is efficient, the smoke return is utilized to replace the injection of ambient air in the preheating stage, the heating energy consumption is reduced, the secondary treatment is realized through smoke compensation in the low working condition stage, the efficiency is improved, the whole-process purification is realized, the catalytic unit is heated to the working temperature in advance in the preheating stage, the problem that pollutants are not treated in the initial stage of starting an engine is avoided, and the full-time purification standard of environmental protection requirements is met. The system effectively solves the problems of high preheating energy consumption, low working condition efficiency and incapability of whole-course purification of the traditional tail gas treatment system through the innovative design of flue gas reflux, and has remarkable practical value and economic benefit. Drawings For a clearer description of the technical solutions of the embodiments of the pr