CN206168225U

CN206168225U - Coke oven flue gas SCR denitration catalyst protection device

Info

Publication number: CN206168225U
Application number: CN201621070277.2U
Authority: CN
Inventors: 霍延中; 尹华; 孙刚森
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2016-09-22
Filing date: 2016-09-22
Publication date: 2017-05-17
Anticipated expiration: 2026-09-22

Abstract

The utility model relates to a coke oven flue gas SCR denitration catalyst protection device, the flue gas at flue gas pipeline intercommunication denitration reactor top enters the mouth, and smoke purifying outlet is established to denitration reactor's bottom, flue gas pipeline is equipped with in proper order along flue gas flow direction and spouts ammonia pipe, metal filters and flushing pipe no. 1, be equipped with multilayer denitration catalyst in the denitration reactor, the top of every pull -up nitre catalyst all is equipped with flushing pipe no. 2 and heating air pipe, two intercommunication backs of flushing pipe no. 1 and flushing pipe are connected outside water supply installation through the force (forcing) pump and are constituteed the rinse -system, each heating air pipe intercommunication back is connected outside heating device through the fan and is constituteed hot air system, flue gas pipeline bottom and ash bucket bottom are equipped with the wash -out valve respectively. The utility model discloses effective filtration ammonium salt, viscous particle thing prevent flue gas impurity contamination denitration catalyst before the denitration catalyst, and can wash on line metal filters and denitration catalyst, the high -efficient denitration of denitration catalyst has been guaranteed, extension denitration catalyst life.

Description

A kind of flue gases of cock oven SCR denitration protection device

Technical field

This utility model is related to flue gases of cock oven purification techniques field, more particularly to a kind of flue gases of cock oven SCR denitration is urged Agent protection device.

Background technology

About 180 DEG C~300 DEG C of flue gases of cock oven temperature, belongs to middle low-temperature flue gas.Complicated components in flue gases of cock oven, except two Outside the key components such as carbonoxide, nitrogen, oxygen, also containing sulfur dioxide, nitric oxide, water vapour, tar, ammonia, carbon monoxide, Free charcoal, hydrogen sulfide, benzene etc..

When flue gases of cock oven denitration adopts ammonia for the SCR techniques of reducing agent, the ammonia in flue gases of cock oven and sulfur dioxide, one Carbonoxide, hydrogen sulfide etc. can form various ammonium salts, can separate out under worst cold case；Water vapour, tar, free charcoal, benzene etc. can shapes Into sticky particle thing.The ammonium salt and particulate matter separated out in flue gas can be deposited on SCR catalyst pore surface, cover catalysis activity Position, blocks gas channel, causes resistance to increase, and catalyst inactivation, denitration efficiency declines.

Because flue gases of cock oven impurity has certain viscosity, conventional acoustic wave ash ejector can not meet deashing requirement.Therefore, Exploitation one kind can effective protection flue gases of cock oven SCR denitration, prevent that catalyst is capped, blocking device very must Will.

The content of the invention

This utility model provides a kind of flue gases of cock oven SCR denitration protection device, and by combination metal is arranged Drainage screen, flush pipe and the method for adding warm-air pipe, effectively filtered ammonium salt, sticky particle thing before denitrating catalyst, prevented cigarette Gas impurity pollutes denitrating catalyst；And on-line rinsing can be carried out to metal filter screen and denitrating catalyst, denitrating catalyst is rinsed Afterwards can also on-line heating drying；The NO_x Reduction by Effective of denitrating catalyst is ensure that, extends denitrating catalyst service life.

In order to achieve the above object, this utility model employs the following technical solutions realization：

A kind of flue gases of cock oven SCR denitration protection device, including the flue, denitration reaction that are sequentially connected Device, rinse-system and hot-air system；Smoke inlet at the top of the flue connection Benitration reactor, the bottom of Benitration reactor Portion sets ash bucket, and neat stress outlet is located at the side of ash bucket；Flue is sequentially provided with spray ammonia pipe, metal mistake along flow of flue gas direction Filter screen and flush pipe one；Multilamellar denitrating catalyst is provided with Benitration reactor, flushing is equipped with above every layer of denitrating catalyst Guan Erhe adds warm-air pipe；Flush pipe one connects outside water supply installation composition and rinses system after connecting with flush pipe two by force (forcing) pump System；Each bar to add and connect outside heating plant composition hot-air system by blower fan after warm-air pipe connection；Flue bottom and ash bucket Bottom is respectively equipped with drain valve.

The flush pipe one, flush pipe two and to add and be respectively equipped with electrically operated valve on warm-air pipe, each electrically operated valve, force (forcing) pump and Blower fan is connected respectively with control system.

The flue bottom of the metal filter screen both sides is respectively equipped with drain valve.

Compared with prior art, the beneficial effects of the utility model are：

1) effectively solve first by metal filtration net filtration ammonium salt, sticky particle thing before flue gases of cock oven contact denitrating catalyst The certainly easy blockage problem of denitrating catalyst, it is to avoid denitrating catalyst inactivation, blocking, it is ensured that NO_x Reduction by Effective and system stable operation；

2) flush pipe one of metal filter screen side can effectively dissolve, rinse ammonium salt, sticky particle thing that it is intercepted, Realize metal filter screen on-line cleaning；

3) flush pipe two can realize the on-line cleaning of denitrating catalyst, plus warm-air pipe is capable of achieving denitrating catalyst after cleaning Drying, it is ensured that the life-time service of denitrating catalyst；

4) metal filter screen is reusable, eliminates frequent dismounting and change work, reduces labor intensity；

5) wastewater reuse approach is rinsed, it is to avoid cause secondary pollution with row outside flue gas.

Description of the drawings

Fig. 1 is the structural representation of flue gases of cock oven SCR denitration protection device described in the utility model.

In figure：1. the flue gas of Benitration reactor 1a. Benitration reactors top straight tube 1b. Benitration reactor bottom ash bucket 2. The denitration of 5. 2 7. drain valve of force (forcing) pump 6a. one 6b. flush pipes of flush pipe of spray 4. metal filter screen of ammonia pipe of pipeline 3. 8. is urged Agent 9. plus the blower fan of warm-air pipe 10.

Specific embodiment

Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：

As shown in figure 1, a kind of flue gases of cock oven SCR denitration protection device described in the utility model, including successively The flue 2 of connection, Benitration reactor 1, rinse-system and hot-air system；The connection Benitration reactor 1 of the flue 2 is pushed up The smoke inlet in portion, the bottom of Benitration reactor 1 sets ash bucket 1b, and neat stress outlet is located at the side of ash bucket 1b；The edge of flue 2 Flow of flue gas direction is sequentially provided with spray ammonia pipe 3, metal filter screen 4 and the 6a of flush pipe one；Multilamellar denitration is provided with Benitration reactor 1 Catalyst 8, the top of every layer of denitrating catalyst 8 is equipped with the 6b of flush pipe two and plus warm-air pipe 9；The 6a of flush pipe one and flush pipe two Outside water supply installation is connected by force (forcing) pump 5 after 6b connections and constitutes rinse-system；Each bar adds warm-air pipe 9 to pass through blower fan 10 after connecting The outside heating plant composition hot-air system of connection；The bottom of flue 2 and ash bucket 1b bottoms are respectively equipped with drain valve 7.

The 6a of the flush pipe one, the 6b of flush pipe two and to add and be respectively equipped with electrically operated valve on warm-air pipe 9, each electrically operated valve, plus Press pump and blower fan are connected respectively with control system.

A kind of course of work of flue gases of cock oven SCR denitration protection device described in the utility model is as follows：

1) flue gases of cock oven is entered by flue 2 from the top of top straight tube 1a of Benitration reactor 1, Jing spray ammonia and The denitration of denitrating catalyst 8 is purified, and the flue gases of cock oven after purification flows out from the side of the bottom ash bucket 1b of Benitration reactor 1；

2) spray ammonia pipe 3, metal filter screen 4 and the 6a of flush pipe one are set gradually along flow of flue gas direction in flue 2；Spray Ammonia pipe 3 is used to spray into denitrification reducing agent ammonia into flue gases of cock oven；Metal filter screen 4 is used to filter the ammonium in flue gases of cock oven Salt and sticky particle thing；The 6a of flush pipe one is used to be rinsed metal filter screen 4；

3) top of denitrating catalyst 8 in Benitration reactor 1 is provided with the 6b of flush pipe two, in denitrating catalyst 8 Tamper be rinsed cleaning；

4) drain valve 7 of the bottom of sewage Jing flues 2 after metal filter screen 4 is rinsed drains into sewage disposal system；It is de- Sewage after denox catalyst 8 is rinsed falls into Benitration reactor bottom ash bucket 1b, and Jing drain valves 7 drain into sewage disposal system；

5) rinse after denitrating catalyst 8 by plus warm-air pipe 9 carry out high-temperature heating drying.

It is fixed that the 6b of flush pipe two of the 6a of flush pipe one and the top of denitrating catalyst 8 after the metal filter screen 4 is respectively adopted When or surely hinder mode be rinsed.

The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not Be confined to this, any those familiar with the art in the technical scope that this utility model is disclosed, according to this practicality New technical scheme and its utility model design in addition equivalent or change, all should cover in protection model of the present utility model Within enclosing.

Claims

1. a kind of flue gases of cock oven SCR denitration protection device, it is characterised in that including the flue being sequentially connected, Benitration reactor, rinse-system and hot-air system；Smoke inlet at the top of the flue connection Benitration reactor, denitration is anti- The bottom for answering device sets ash bucket, and neat stress outlet is located at the side of ash bucket；Flue is sequentially provided with spray ammonia along flow of flue gas direction Pipe, metal filter screen and flush pipe one；Multilamellar denitrating catalyst is provided with Benitration reactor, the top of every layer of denitrating catalyst is equal It is provided with flush pipe two and plus warm-air pipe；Flush pipe one connects outside water supply installation composition after connecting with flush pipe two by force (forcing) pump Rinse-system；Each bar to add and connect outside heating plant composition hot-air system by blower fan after warm-air pipe connection；Flue bottom And hopper bottom is respectively equipped with drain valve.

2. a kind of flue gases of cock oven SCR denitration protection device according to claim 1, it is characterised in that described Flush pipe one, flush pipe two and to add and be respectively equipped with electrically operated valve on warm-air pipe, each electrically operated valve, force (forcing) pump and blower fan respectively with control System connection processed.

3. a kind of flue gases of cock oven SCR denitration protection device according to claim 1, it is characterised in that described The flue bottom of metal filter screen both sides is respectively equipped with drain valve.