Stable waste incineration NOX flue gas treatment equipment

Abstract

The utility model provides stable waste incineration NOX flue gas treatment equipment which comprises a main exhaust pipe connected with an exhaust port of a waste incinerator and a flue gas multi-stage monitoring device, the flue gas multi-stage monitoring device comprises an auxiliary exhaust pipe, a first-stage catalysis box, a second-stage catalysis box, a third-stage catalysis box, a shunt pipe, a plurality of transfer branch pipes, a plurality of exhaust branch pipes, a circulating pipe, a plurality of NOX monitors and a plurality of one-way electromagnetic valves.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage incineration equipment technical field, especially relates to a stable garbage incineration NOX flue gas treatment equipment. BACKGROUND

[0002] NOX emission problem in garbage incineration process has been concerned, NOX not only causes pollution to atmospheric environment, and is the main precursor of photochemical smog and acid rain, and the damage to ecological environment is particularly serious, directly influences economic development, and the existing NOX flue gas treatment equipment mostly adopts NOX monitoring system to monitor the NOX concentration in the flue gas catalytic tower, but due to the concentration of single monitoring in the tower and the concentration when discharging may exist certain difference, leading to the unstable concentration of discharging NOX, causes the security hidden danger to the discharging environment. UTILITY MODEL CONTENTS

[0003] The utility model discloses in order to solve the technical insufficiency, provide a kind of stable garbage incineration NOX flue gas treatment equipment, including with garbage incineration furnace exhaust port connection's main exhaust pipe and flue gas multistage monitoring device, the flue gas multistage monitoring device is connected with main exhaust pipe, the flue gas multistage monitoring device includes vice exhaust pipe, primary catalytic tank, secondary catalytic tank, tertiary catalytic tank, shunt pipe, several transfer branch pipes, several exhaust branch pipes, circulation pipe, several NOX monitors and several one-way electromagnetic valves, the primary catalytic tank, secondary catalytic tank and tertiary catalytic tank are connected between by transfer branch pipe, the primary catalytic tank is connected between with main exhaust pipe by shunt pipe, the both ends of several exhaust branch pipes are connected with several transfer branch pipes and vice exhaust pipe respectively, the circulation pipe is connected with the transfer branch pipe on tertiary catalytic tank in one end, and it is connected with primary catalytic tank in another end, the several NOX monitors are respectively set on main exhaust pipe and several transfer branch pipes, the several one-way electromagnetic valves are respectively set on main exhaust pipe, shunt pipe, several transfer branch pipes, several exhaust branch pipes and circulation pipe, the several NOX monitors are connected and control corresponding several one-way electromagnetic valves respectively.

[0004] The technical scheme is adopted, the flue gas discharged from the catalytic tower enters the main exhaust pipe, is monitored by the NOX monitor, if qualified, is discharged through the main exhaust pipe, if unqualified, the one-way electromagnetic valve on the main exhaust pipe is closed, the electric box electromagnetic valve on the shunt pipe is opened, the flue gas enters the catalytic tank for secondary catalysis, after the secondary catalysis, is discharged through the transfer branch pipe and is monitored by the NOX monitor on the transfer branch pipe again, if qualified, is discharged through the exhaust branch pipe into the secondary exhaust pipe, if unqualified, the one-way electromagnetic valve on the exhaust branch pipe is closed, the flue gas enters the secondary catalytic tank and the tertiary catalytic tank for secondary catalysis, if still unqualified after the catalysis, is returned to the primary catalytic tank through the circulation pipe, until the NOX monitor is qualified, can be discharged from the secondary exhaust pipe, the NOX content in the discharged flue gas meets the emission standard, and the safety and stability of the emission are improved.

[0005] The further setting of the utility model is that: the one-way electromagnetic valve is also arranged on the position of the secondary exhaust pipe close to the exhaust branch pipe connected with the secondary catalytic tank and the tertiary catalytic tank.

[0006] The further setting of the utility model is that: the one-way electromagnetic valve is also arranged on the position of the secondary exhaust pipe close to the exhaust branch pipe connected with the secondary catalytic tank and the tertiary catalytic tank.

[0007] The further setting of the utility model is that: the primary catalytic tank, the secondary catalytic tank and the tertiary catalytic tank all comprise a tank body, a tank door movably connected with the tank body and a distributor for placing the catalyst for NOX catalysis.

[0008] The further setting of the utility model is that: the primary catalytic tank, the secondary catalytic tank and the tertiary catalytic tank all comprise a tank body, a tank door movably connected with the tank body and a distributor for placing the catalyst for NOX catalysis.

[0009] The further setting of the utility model is that: the tank body is provided with a barometer for monitoring the air pressure in the tank.

[0010] The further setting of the utility model is that: the tank body is provided with a barometer for monitoring the air pressure in the tank. BRIEF DESCRIPTION OF DRAWINGS

[0011] BRIEF DESCRIPTION OF DRAWINGS Fig. 1 It is a structure schematic view of a stable garbage incineration NOX flue gas treatment equipment of the utility model.

[0012] BRIEF DESCRIPTION OF DRAWINGS Fig. 2 It is a local structure schematic view of a stable garbage incineration NOX flue gas treatment equipment of the utility model. It is a structure schematic view of a stable garbage incineration NOX flue gas treatment equipment of the utility model.

[0013] 1-Main exhaust pipe, 2-Multi-stage flue gas monitoring device, 3-Auxiliary exhaust pipe, 4-First-stage catalytic converter, 5-Second-stage catalytic converter, 6-Third-stage catalytic converter, 7-Diverter pipe, 8-Transfer branch pipe, 9-Exhaust branch pipe, 10-Circulation pipe, 11-NOX monitor, 12-One-way solenoid valve, 13-Box body, 14-Box door, 15-Distributor, 16-Barometer. Detailed Implementation

[0014] like Figs. 1-2 As shown, a stable NOx flue gas treatment device for waste incineration includes a main exhaust pipe 1 connected to the exhaust port of the waste incinerator and a multi-stage flue gas monitoring device 2. The multi-stage flue gas monitoring device is connected to the main exhaust pipe and includes a secondary exhaust pipe 3, a primary catalytic converter 4, a secondary catalytic converter 5, a tertiary catalytic converter 6, a branch pipe 7, several transfer branch pipes 8, several exhaust branch pipes 9, a recirculation pipe 10, several NOx monitors 11, and several one-way solenoid valves 12. The primary, secondary, and tertiary catalytic converters are all connected by transfer branch pipes. The primary catalytic converter is connected to the main exhaust pipe via a splitter pipe. Both ends of the plurality of exhaust branch pipes are respectively connected to a plurality of transfer branch pipes and an auxiliary exhaust pipe. One end of the recirculation pipe is connected to a transfer branch pipe on the tertiary catalytic converter, and the other end is connected to the primary catalytic converter. A plurality of NOx monitors are respectively installed on the main exhaust pipe and the plurality of transfer branch pipes. A plurality of one-way solenoid valves are respectively installed on the main exhaust pipe, the splitter pipe, the plurality of transfer branch pipes, the plurality of exhaust branch pipes, and the recirculation pipe. The plurality of NOx monitors are respectively connected to and control the corresponding plurality of one-way solenoid valves.

[0015] The flue gas discharged from the catalytic converter enters the main exhaust pipe and is monitored by a NOx monitor. If the NOx level is within acceptable limits, it is discharged through the main exhaust pipe. If the level is not within acceptable limits, the one-way solenoid valve on the main exhaust pipe closes, and the solenoid valve on the distributor pipe opens, allowing the flue gas to enter the catalytic converter for secondary catalysis. After secondary catalysis, the flue gas is discharged through the transfer branch pipe, and the NOx concentration is monitored again by the NOx monitor on the transfer branch pipe. If the concentration is within acceptable limits, the flue gas is discharged through the exhaust branch pipe into the auxiliary exhaust pipe. If the concentration is not within acceptable limits, the one-way solenoid valve on the exhaust branch pipe closes, and the flue gas enters the secondary and tertiary catalytic converters for further catalysis. If the concentration is still not within acceptable limits after catalysis, the flue gas is returned to the primary catalytic converter through the circulation pipe until the NOx level is within acceptable limits, at which point it can be discharged through the auxiliary exhaust pipe. This ensures that the NOx content in the discharged flue gas meets emission standards, improving the safety and stability of emissions.

[0016] A one-way solenoid valve is also installed on the auxiliary exhaust pipe near the exhaust branch pipe that connects to the secondary catalytic converter and the tertiary catalytic converter.

[0017] The one-way electromagnetic valve arranged on the auxiliary exhaust pipe near the exhaust branch pipe connected with the second and third catalytic boxes can prevent the exhaust gas after catalysis from flowing back into the first and second catalytic boxes.

[0018] The first, second and third catalytic boxes each comprise a box body 13, a box door 14 movably connected with the box body and a distributor 15 for placing catalysts for NOX catalysis.

[0019] The first, second and third catalytic boxes each comprise a box body, a box door movably connected with the box body and a distributor for placing catalysts for NOX catalysis, so that the catalysts can be added conveniently and timely.

[0020] The box body is provided with a barometer 16 for monitoring the air pressure in the box.

[0021] The barometer arranged on the box body can be used to determine whether the air pressure in the box is safe before the box door is opened for adding catalysts.

Claims

1. A stable waste incineration NOx flue gas treatment device, comprising a main exhaust pipe connected with a waste incinerator exhaust port and a flue gas multi-stage monitoring device connected with the main exhaust pipe, characterized in that: The flue gas multi-stage monitoring device comprises a secondary exhaust pipe, a first-stage catalytic tank, a second-stage catalytic tank, a third-stage catalytic tank, a shunt pipe, a plurality of transfer branch pipes, a plurality of exhaust branch pipes, a circulation pipe, a plurality of NOX monitors and a plurality of one-way electromagnetic valves, the first-stage catalytic tank, the second-stage catalytic tank and the third-stage catalytic tank are connected through the transfer branch pipes, the first-stage catalytic tank is connected with the main exhaust pipe through the shunt pipe, two ends of the plurality of exhaust branch pipes are respectively connected with the plurality of transfer branch pipes and the secondary exhaust pipe, one end of the circulation pipe is connected with the transfer branch pipe on the third-stage catalytic tank, and the other end is connected with the first-stage catalytic tank, the plurality of NOX monitors are respectively arranged on the main exhaust pipe and the plurality of transfer branch pipes, the plurality of one-way electromagnetic valves are respectively arranged on the main exhaust pipe, the shunt pipe, the plurality of transfer branch pipes, the plurality of exhaust branch pipes and the circulation pipe, and the plurality of NOX monitors are respectively connected with and control the corresponding plurality of one-way electromagnetic valves.

2. A stable waste incineration NOx flue gas treatment apparatus according to claim 1, characterized in that: A one-way electromagnetic valve is arranged on the secondary exhaust pipe near the exhaust branch pipe connected with the second-stage catalytic tank and the third-stage catalytic tank.

3. A stable waste incineration NOx flue gas treatment apparatus according to claim 1, characterized in that: The first-stage catalytic tank, the second-stage catalytic tank and the third-stage catalytic tank each comprise a tank body, a tank door movably connected with the tank body and a distributor for placing a catalyst for NOX catalysis.

4. A stable waste incineration NOx flue gas treatment apparatus according to claim 3, characterized in that: A barometer for monitoring the air pressure in the tank is arranged on the tank body.

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