Compressed air purging and cooling system of positive pressure waste gas incinerator

Abstract

The utility model belongs to the technical field of positive pressure waste gas incinerators, and particularly relates to a compressed air purging and cooling system of a positive pressure waste gas incinerator. The positive pressure waste gas incinerator purging and cooling system comprises an incinerator, a furnace end is arranged on the incinerator and connected with a compressed air pipeline, the compressed air pipeline is connected with a fire observation window through a fire observation window air distribution pipeline, the fire observation window is located on the incinerator, the compressed air pipeline is connected with dryers connected in parallel through a compressed air back-blowing pipeline, and the dryers are connected with the incinerator through a compressed air back-blowing pipeline. The pipeline after the dryers are connected in parallel is connected with the online flue gas monitoring and sampling back-blowing port before denitration; and the online flue gas monitoring and sampling back-blowing port before denitration is provided with a pipeline connected with the online flue gas analyzer. According to the compressed air purging and cooling system of the positive pressure waste gas incinerator, compressed air pipelines are reasonably arranged, and the fire observation window, the burning torch and the flame monitor are protected; compressed air is connected with a flue gas monitoring system, so that the sampling port is prevented from being blocked, and the accuracy of detection data is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the positive pressure waste gas incinerator technical field, concretely relates to a kind of positive pressure waste gas incinerator compressed air purging cooling system. BACKGROUND

[0002] In waste gas treatment, using incinerator to burn is more common processing mode, and the high-temperature flue gas in waste gas incinerator hearth belongs to micro-positive pressure, and in order to better master the waste gas combustion condition inside incinerator, observation window is often arranged on incinerator, and the service life of heat-resistant tempered glass on observation window of incinerator hearth is short due to high temperature, and it needs to be replaced and overhauled irregularly;Secondly, ignition gun inside burner of incinerator, observation hole outside burner and flame monitor (key instrument for monitoring burner flame of incinerator) close to burner will cause failure or malfunction due to long-term high-temperature environment;Finally, flue gas SCR denitration online monitoring system located in waste heat boiler section and flue gas CEMS online monitoring system located in upper part of chimney need to be backblown by compressed air after drying and dewatering to online analysis sampling port regularly to avoid being blocked by impurities in flue gas, so as to affect the accuracy of flue gas online detection data.

[0003] Therefore, it is necessary to design positive pressure waste gas incinerator compressed air system to realize cooling and purging function. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems of overcoming the above-mentioned defects existing in prior art, and provides positive pressure waste gas incinerator compressed air purging cooling system, which reasonably arranges observation window and compressed air pipeline, ensures the service life of heat-resistant tempered glass at observation window, realizes timely cooling at ignition gun and flame monitor, and plays a good protection role;In addition, by connecting compressed air with flue gas detection system, it effectively avoids the blockage of sampling port, and ensures the accuracy of detection data.

[0005] The utility model discloses a positive pressure waste gas incinerator compressed air purging cooling system, including incinerator, the incinerator both sides furnace wall on be provided with 6 symmetrical arrangement's observation window, the observation window be connected with compressed air pipeline through observation window air distribution pipeline, compressed air pipeline and furnace head connection, the furnace head is located incinerator left side, compressed air pipeline be connected with air dryer A and air dryer B through compressed air back flushing pipeline, air dryer A and air dryer B are in parallel, the parallel pipeline is connected with the denitration before flue gas on - line monitoring sampling back flushing mouth, the denitration before flue gas on - line monitoring sampling back flushing mouth is located SCR denitration reactor upper end, the SCR denitration reactor is located incinerator right side, the SCR denitration reactor right side is connected with high -temperature coal economizer, high -temperature coal economizer is connected with low -temperature coal economizer, low -temperature coal economizer is connected with air preheater, the air preheater is connected with chimney through flue.

[0006] Preferably, the observation window is provided with an observation port, and the observation port is composed of high-temperature-resistant tempered glass.

[0007] Preferably, the compressed air pipeline is provided with a boundary valve, a compressed air check valve, a pressure reducing valve, a pressure gauge and a flowmeter.

[0008] Preferably, the compressed air pipeline is connected with an emergency standby fan through a pipeline, and a fan check valve is arranged on the pipeline.

[0009] Preferably, the furnace head is provided with an ignition gun, a flame monitor and two furnace head observation holes (14), and three pipelines are arranged between the compressed air pipeline and the furnace head and connected with the ignition gun, the flame monitor and the furnace head observation holes, respectively.

[0010] Preferably, the SCR denitration reactor is provided with a denitration after flue gas on-line monitoring sampling back flushing mouth, and the denitration after flue gas on-line monitoring sampling back flushing mouth is connected with the denitration before flue gas on-line monitoring sampling back flushing mouth in the same way.

[0011] Preferably, the denitration after flue gas on-line monitoring sampling back flushing mouth and the denitration before flue gas on-line monitoring sampling back flushing mouth are provided with pipelines connected with a flue gas on-line analyzer.

[0012] Preferably, the chimney is provided with a flue gas on-line monitoring sampling back flushing mouth, the flue gas on-line monitoring sampling back flushing mouth is connected with the parallel pipelines of the air dryer A and the air dryer B, and the flue gas on-line monitoring sampling back flushing mouth is provided with a pipeline connected with the flue gas on-line analyzer.

[0013] Specifically, the positive pressure waste gas incinerator compressed air purging cooling system, the incinerator ignition stage, the ignition gun of the furnace head uses the air distribution of the natural gas pipeline and the compressed air pipeline to ignite, the flame monitor detects the ignition signal, that is, the ignition is successful, the natural gas pipeline stops delivering natural gas, and the compressed air pipeline continuously delivers air through the pipeline connected with the ignition gun and the flame monitor, thereby realizing the continuous cooling of the ignition gun and the flame monitor, two furnace head observation holes are arranged at the furnace head, so that the inspection personnel can conveniently monitor the furnace head, the furnace head observation hole is also connected with the compressed air pipeline, so that the furnace head observation hole is cooled and cooled during the operation of the device, and the distortion and rupture of the tempered glass are prevented; The positive pressure waste gas incinerator needs to be regularly inspected by the inspection personnel through the six observation windows during daily production, when the inspection is carried out, the observation window shutter operating handle is rotated, the shutter is rotated to be perpendicular to the observation port, the compressed air enters the observation window through the compressed air injection port, and the observation window is cooled; the compressed air injected through the compressed air injection port is continuously delivered during the ignition and shutdown of the device, so that the service life of the observation window passage shutter and the heat-resistant tempered glass of the observation window is guaranteed; during the operation of the incinerator, the flue gas is monitored through the denitration online monitoring system located on the SCR denitration reactor and the external exhaust gas CEMS online monitoring system located on the upper part of the chimney, in order to guarantee the accuracy of the data, the compressed air after drying and purification is introduced into each sampling port of the online analyzer, the online analysis sampling port is regularly backblown, the compressed air is dried through two parallel dryers, and the dryers can be switched at any time according to the system operation state. In order to guarantee the stability of the system, a standby pipeline is arranged on the compressed air pipeline, the standby pipeline is connected with an emergency standby fan, once the compressed air in the compressed air pipeline is interrupted, the flow meter and the pressure gauge in the system present synchronous decline, when the pressure signal in the device is reduced to the interlocking value of the DCS system, the emergency standby fan is automatically started and interlocked, and the emergency standby fan starts to provide compressed air for the system.

[0014] Compared with the prior art, the utility model has the beneficial effect that:

[0015] (1) the utility model in the observation port's heat -resisting tempered glass and between the incinerator pass in compressed air, avoided the direct contact of the high temperature flue gas in the hearth and the observation window passage shutter and heat -resisting tempered glass, also guaranteed the shutter and the observation port heat -resisting tempered glass service life.

[0016] (2) the utility model in the ignition gun ignition stage, the compressed air after reducing can be for the ignition gun ignition to play the combustion-supporting role, also realized during the operation of the incinerator for the ignition gun, the flame monitor, the furnace head observation hole carries out the continuous purging cooling, prolongs the service life of the device.

[0017] (3) The utility model discloses a compressed air and flue gas online detection system connection, effectively avoid the sampling mouth blockage situation, guarantee the accuracy of detection data.

[0018] (4) The utility model discloses through introducing emergency standby fan and two air dryers, guarantee the response ability of sudden situation during the operation of device, guarantee the stability of device operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 For the positive pressure waste gas incinerator compressed air purging cooling system structure diagram of the utility model.

[0020] Fig. 2 For the positive pressure waste gas incinerator compressed air purging cooling system structure diagram of the utility model.

[0021] In the drawing: 1, incinerator;2, boundary valve;3, compressed air check valve;4, pressure reducing valve;5, pressure gauge;6, flowmeter;7, fan inlet muffler;8, emergency standby fan;9, fan check valve;10, fire watching window air distribution pipeline;11, compressed air back flushing pipeline;12, ignition gun;13, natural gas pipeline;14, furnace end fire watching hole;15, flame monitor;16, fire watching window;17, air dryer A;18, air dryer B;19, before denitration flue gas online monitoring sampling back flushing mouth;20, after denitration flue gas online monitoring sampling back flushing mouth;21, compressed air pipeline;22, SCR denitration reactor;23, high-temperature coal economizer;24, low-temperature coal economizer;25, air preheater;26, flue gas online analyzer;27, flue;28, flue gas online monitoring sampling back flushing mouth;29, chimney;30, furnace end;1601, fire watching window baffle operating handle;1602, baffle;1603, compressed air injection port;1604, observation port. DETAILED DESCRIPTION

[0022] The utility model will be further described below in connection with the drawings.

[0023] As Figs. 1-2The utility model discloses a positive pressure waste gas incinerator purging cooling system, including incinerator 1, the left side of incinerator 1 is provided with furnace end 30, furnace end 30 is connected with compressed air pipeline 21, compressed air pipeline 21 is connected with observation window 16 through observation window air distribution pipeline 10, observation window 16 is located on incinerator 1, compressed air pipeline 21 is connected with air dryer A 17 and air dryer B 18 through compressed air back flushing pipeline 11, air dryer A 17 and air dryer B 18 are connected in parallel, the parallel pipeline is connected with the denitration before flue gas on-line monitoring sampling back flushing mouth 19, the denitration before flue gas on-line monitoring sampling back flushing mouth 19 is located on the upper end of SCR denitration reactor 22, the SCR denitration reactor 22 is located on the right side of incinerator 1, the right side of SCR denitration reactor 22 is connected with high temperature coal economizer 23, high temperature coal economizer 23 is connected with low temperature coal economizer 24, low temperature coal economizer 24 is connected with air preheater 25, air preheater 25 is connected with chimney 29 through flue 27.

[0024] The observation window 16 is symmetrically distributed and arranged on the two side walls of the incinerator 1.

[0025] The observation window 16 is symmetrically distributed and arranged on the two side walls of the incinerator 1.

[0026] The compressed air pipeline 21 is provided with a boundary valve 2, a compressed air check valve 3, a pressure reducing valve 4, a pressure gauge 5 and a flowmeter 6.

[0027] The compressed air pipeline 21 is connected with an emergency standby fan 8 through a pipeline, and the pipeline is provided with a fan check valve 9.

[0028] The furnace end 30 is provided with an ignition gun 12, a flame monitor 15 and two furnace end observation holes 14, and three pipelines are arranged between the compressed air pipeline 21 and the furnace end 30 and connected with the ignition gun 12, the flame monitor 15 and the furnace end observation holes 14 respectively.

[0029] The ignition gun 12 is connected with a natural gas pipeline 13.

[0030] The SCR denitration reactor 22 is provided with a denitration after flue gas on-line monitoring sampling back flushing mouth 20, and the denitration after flue gas on-line monitoring sampling back flushing mouth 20 is connected with the denitration before flue gas on-line monitoring sampling back flushing mouth 19 in the same way.

[0031] The denitration post flue gas online monitoring sampling back blowing port 20 and the denitration pre flue gas online monitoring sampling back blowing port 19 are provided with pipelines connected with the flue gas online analyzer 26.

[0032] The chimney 29 is provided with the flue gas online monitoring sampling back blowing port 28 connected with the pipelines of the air dryer A17 and the air dryer B18 in parallel, and the flue gas online monitoring sampling back blowing port 28 is provided with a pipeline connected with the flue gas online analyzer 26.

[0033] Specifically, the positive pressure waste gas incinerator compressed air purging cooling system, the incinerator 1 ignition stage, the ignition gun 12 of the furnace head 30 utilizes the air distribution of the natural gas pipeline 13 and the compressed air pipeline 21 to ignite, the flame monitor 15 detects the ignition signal, that is, the ignition is successful, the natural gas pipeline 13 stops delivering natural gas, and the compressed air pipeline 21 continuously delivers air through the pipeline connected with the ignition gun 12 and the flame monitor 15, thereby realizing continuous cooling of the ignition gun 12 and the flame monitor 15. The furnace head 30 is provided with two furnace head observation holes 14, which facilitate the monitoring of the furnace head 30 by the inspection personnel. The furnace head observation hole 14 is connected with the compressed air pipeline 21 to realize cooling and temperature reduction at the furnace head observation hole 14 during the operation of the device, thereby preventing the deformation and rupture of the tempered glass. The positive pressure waste gas incinerator needs to be regularly inspected by the inspection personnel through the six observation windows 16 during daily production. During the inspection, the observation window shutter handle 1601 is rotated, the shutter 1602 is rotated to be perpendicular to the observation port 1604, the compressed air enters through the compressed air injection port 1603 to cool the observation window 16, and the compressed air injected through the compressed air injection port 1603 is continuously delivered during the operation of the device, thereby ensuring the service life of all structures at the observation window 16. During the operation of the incinerator 1, the flue gas is monitored by the denitration online monitoring system on the SCR denitration reactor 22 and the CEMS online monitoring system of the exhaust flue gas on the upper part of the chimney 29. In order to ensure the accuracy of the data, the compressed air after drying and purification is introduced into each sampling port of the flue gas online analyzer 26, the sampling port of the flue gas online analyzer 26 is regularly back blown, the compressed air is dried through two parallel dryers, and the dryers can be switched at any time according to the system operation state. In order to ensure the stability of the system, the compressed air pipeline 21 is provided with a standby pipeline connected with the emergency standby fan 8. Once the compressed air in the compressed air pipeline 21 is interrupted, the flow meter 6 and the pressure gauge 5 in the system present a synchronous decrease, and when the pressure signal in the device decreases to the interlocking value of the DCS system, the emergency standby fan 8 is automatically started and interlocked, and the emergency standby fan 8 is started to continuously provide compressed air for the system.

Claims

1. A positive pressure off-gas incinerator compressed air purge cooling system, characterized by, The incinerator (1) is provided with a furnace head (30) on the left side, the furnace head (30) is connected with a compressed air pipeline (21), the compressed air pipeline (21) is connected with a fire window (16) through a fire window air distribution pipeline (10), the fire window (16) is located on the incinerator (1), the compressed air pipeline (21) is connected with an air dryer A (17) and an air dryer B (18) through a compressed air back blowing pipeline (11), the air dryer A (17) and the air dryer B (18) are connected in parallel, the parallel pipeline is connected with a denitration front flue gas online monitoring sampling back blowing port (19), the denitration front flue gas online monitoring sampling back blowing port (19) is provided with a pipeline connected with a flue gas online analyzer (26), the denitration front flue gas online monitoring sampling back blowing port (19) is located on the upper end of an SCR denitration reactor (22), the SCR denitration reactor (22) is located on the right side of the incinerator (1), the right side of the SCR denitration reactor (22) is connected with a high-temperature economizer (23), the high-temperature economizer (23) is connected with a low-temperature economizer (24), the low-temperature economizer (24) is connected with an air preheater (25), the air preheater (25) is connected with a chimney (29) through a flue (27).

2. The positive pressure off-gas incinerator compressed air purge cooling system of claim 1, wherein, The fire window (16) is provided with six fire windows on the two side walls of the incinerator (1) and is symmetrically distributed.

3. The positive pressure off-gas incinerator compressed air purge cooling system of claim 1, wherein, The fire window (16) is provided with an observation port (1604), the fire window (16) is provided with a fire window baffle (1602), the fire window baffle (1602) is connected with a fire window baffle operating handle (1601), the outer wall of the side of the fire window (16) close to the incinerator (1) is provided with a compressed air injection port (1603), and the compressed air injection port (1603) is connected with the fire window air distribution pipeline (10).

4. The positive pressure off gas incinerator compressed air purge cooling system of claim 1, wherein, The compressed air pipeline (21) is provided with a boundary valve (2), a compressed air check valve (3), a pressure reducing valve (4), a pressure gauge (5) and a flowmeter (6).

5. The positive pressure off gas incinerator compressed air purge cooling system of claim 1, wherein, The compressed air pipeline (21) is connected with an emergency standby fan (8) through a pipeline, the pipeline is provided with a fan check valve (9), and the emergency standby fan (8) is connected with a fan inlet silencer (7).

6. The positive pressure off gas incinerator compressed air purge cooling system of claim 1, wherein, The furnace head (30) is provided with an ignition gun (12), a flame monitor (15) and two furnace head fire holes (14), three pipelines are arranged between the compressed air pipeline (21) and the furnace head (30) and are connected with the ignition gun (12), the flame monitor (15) and the furnace head fire holes (14) respectively.

7. The positive pressure off-gas incinerator compressed air purge cooling system of claim 6, wherein, The ignition gun (12) is connected with a natural gas pipeline (13).

8. The positive pressure off-gas incinerator compressed air purge cooling system of claim 1, wherein, The SCR denitration reactor (22) is provided with a denitration rear flue gas online monitoring sampling back blowing port (20), and the denitration rear flue gas online monitoring sampling back blowing port (20) is connected with the same pipeline as the denitration front flue gas online monitoring sampling back blowing port (19).

9. The positive pressure off-gas incinerator compressed air purge cooling system of claim 1, wherein, The chimney (29) is provided with a flue gas online monitoring sampling back flushing port (28), the flue gas online monitoring sampling back flushing port (28) is connected with the parallel pipeline of the air dryer A (17) and the air dryer B (18), and the flue gas online monitoring sampling back flushing port (28) is provided with a pipeline connected with the flue gas online analyzer (26).

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