CN205386412U - Boiler flue gas denitration system - Google Patents

Boiler flue gas denitration system Download PDF

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Publication number
CN205386412U
CN205386412U CN201620083480.7U CN201620083480U CN205386412U CN 205386412 U CN205386412 U CN 205386412U CN 201620083480 U CN201620083480 U CN 201620083480U CN 205386412 U CN205386412 U CN 205386412U
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CN
China
Prior art keywords
reducing agent
boiler
module
scr reactor
flue gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620083480.7U
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Chinese (zh)
Inventor
殷长福
王清允
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIANJIN YONGFU ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
Original Assignee
TIANJIN YONGFU ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN201620083480.7U priority Critical patent/CN205386412U/en
Application granted granted Critical
Publication of CN205386412U publication Critical patent/CN205386412U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model provides a boiler flue gas denitration system, including boiler, reductant preparation module, reductant supply and controlling means, reductant distribution dosing module, SCR reactor, air heater and draught fan. Wherein, outside reductant supply and controlling means were located the boiler, just outer reductant preparation module was connected with being located the boiler, and reductant distribution dosing module is connected with reductant supply and controlling means through pipeline, and the reductant distributes dosing module to be located the boiler. The entry of boiler afterbody flue and SCR reactor is linked together, and the below of SCR reactor sets up air heater, and the export of SCR reactor is connected with the draught fan, is provided with the economizer in the boiler afterbody flue, has set gradually flying dust rectifier, catalyst layer and filter layer on the SCR reactor follow under extremely. The utility model has the beneficial effect of simple structure, be convenient for maintain, the running cost is low, and removing of nitrogen oxides is rateed highly, convenient to popularize and use.

Description

A kind of boiler flue gas denitration system
Technical field
This utility model relates to flue gases purification field, is specifically related to a kind of boiler flue gas denitration system.
Background technology
In recent years, along with the fast development of domestic economy, the discharge capacity of nitrogen oxides (NOx) pollutant increases sharply, severe contamination ecological environment, become one of key factor of restriction socio-economic development, and the approach controlling NOx has become the focus environmental problem that current social is paid close attention to.
In the method for conventional elimination NOx, selective catalytic reduction (is called for short SCR), and gas denitrifying technology has elimination NOx efficiency height, and the advantage that reducing agent consumption is few is widely used.SCR technology refers under the effect of catalyst, and amino reductive, with the NOx in flue gas, Chemoselective reduction occurs, so as to generate nitrogen and water, thus reducing the discharge capacity of NOx, reduces the flue gas pollution to environment.
Flue gas denitrification system structure of the prior art is complicated, complex operation, runs and maintenance cost is high, and higher site requirements, boiler smoke is easily leaked in air, is not easy to promote the use of.
Utility model content
The purpose of this utility model aims to provide a kind of simple in construction, it is simple to maintenance, runs and maintenance cost is low, and removal of nitrogen oxide rate is high, it is simple to the boiler flue gas denitration system promoted the use of.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of boiler flue gas denitration system, prepares module, reducing agent supply including boiler, reducing agent and controls device, reducing agent distribution jet module, SCR reactor, air preheater and air-introduced machine;
The supply of described reducing agent and control device are positioned at outside boiler, and prepare module with the reducing agent being positioned at outside boiler to be connected, described reducing agent distribution jet module is connected with reducing agent supply and control device by conveyance conduit, and described reducing agent distribution jet module is positioned at boiler;
Described boiler back end ductwork is connected with the entrance of SCR reactor, described SCR reactor be arranged below air preheater, and the outlet of SCR reactor is connected with air-introduced machine, it is provided with economizer in described boiler back end ductwork, in described SCR reactor, is disposed with flying dust commutator, catalyst layer and filter course from top to bottom;
The dust arrester both being connected it is provided with between described boiler back end ductwork with SCR reactor inlet, the air inlet pipeline both being connected it is provided with between described dust arrester with SCR reactor inlet, it is provided with the outlet pipe both being connected between outlet and the air-introduced machine of described SCR reactor, it is provided with the bypass line both being connected between described air inlet pipeline and outlet pipe, described bypass line is provided with bypass solenoid valve.
Preferably, described reducing agent distribution jet module includes reducing agent postinjection module, the supply of described reducing agent and control device and two conveyance conduits are connected, and wherein one is delivered to reducing agent distribution jet module, and another is delivered to reducing agent postinjection module.
Further, the conveyance conduit that the supply of described reducing agent and control device are connected with reducing agent distribution jet module and reducing agent postinjection module respectively is provided with the first electric control valve and the second electric control valve, and described first electric control valve and the second electric control valve control by controlling device.
Further, described reducing agent postinjection module is arranged on the flue before economizer.
Further, described reducing agent distribution jet module and reducing agent postinjection module form by some spray guns, and described some spray guns are uniformly distributed and are atomizing lance, and the spacing between each atomizing lance is be more than or equal to 300 millimeters.
Further, described filter course be arranged below the escaping of ammonia monitor and nitrogen-oxide analyzer,.
Further, described air inlet pipeline is provided with air inlet electromagnetic valve, described outlet pipe is sequentially installed with SCR booster fan and electromagnetic valve of giving vent to anger.
This utility model has the advantage that and has the benefit effect that
1, this utility model is provided with the conveyance conduit of two reducing agents, respectively reducing agent is delivered to reducing agent distribution jet module and reducing agent postinjection module, and conveyance conduit is equipped with electric control valve, thus emitted dose and the spray site of reducing agent can effectively be controlled, running simple to operate, denitration efficiency is high.
2, in this utility model, reducing agent distributes some nozzle layout of sprinkler of jet module in boiler, and the spacing between each atomizing lance is be more than or equal to 300 millimeters, make major part amino material in reducing agent be converted into ammonia, improve utilization rate and the denitration efficiency of amino material.
3, this utility model adds bypass line, and is provided with bypass solenoid valve on bypass line, it is simple to the cleaning of SCR reactor or maintenance, is possible to prevent boiler smoke to be leaked in air simultaneously, and contaminated environment is further ensured that denitration efficiency.
4, this utility model is by good for denitration effect and stable, easy to maintenance, controls system simple, runs and maintenance cost is low, practical, it is simple to promote the use of widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1-boiler;Module prepared by 2-reducing agent;The supply of 3-reducing agent and control device;4-reducing agent distribution jet module;5-SCR reactor;6-air preheater;7-air-introduced machine;8-dust arrester;9-air inlet pipeline;10-outlet pipe;11-bypass line;12-bypass solenoid valve;13-air inlet electromagnetic valve;14-SCR booster fan;15-gives vent to anger electromagnetic valve;
101-economizer;301-the first electric control valve;302-the second electric control valve;401-reducing agent postinjection module;501-flying dust commutator;502-catalyst layer;503-filter course;504-the escaping of ammonia monitor;505-nitrogen-oxide analyzer,.
Detailed description of the invention
As it is shown in figure 1, this utility model provides a kind of boiler flue gas denitration system, prepare module 2, reducing agent supply including boiler 1, reducing agent and control device 3, reducing agent distribution jet module 4, SCR reactor 5, air preheater 6 and air-introduced machine 7.Wherein, reducing agent supply and control device 3 are positioned at outside boiler 1, and preparing module 2 with the reducing agent being positioned at outside boiler 1 to be connected, reducing agent distribution jet module 4 is connected with reducing agent supply and control device 3 by conveyance conduit, and reducing agent distribution jet module 4 is positioned at boiler 1.Reducing agent distribution jet module 4 includes reducing agent postinjection module 401, reducing agent supply and control device 3 are connected with two conveyance conduits, wherein one is delivered to reducing agent distribution jet module 4, another is delivered to reducing agent postinjection module 401, two conveyance conduits are respectively arranged with the first electric control valve 301 and the second electric control valve 302, and the first electric control valve 301 and the second electric control valve 302 control by controlling device.Further, reducing agent postinjection module 401 is arranged on the flue before economizer 101;Reducing agent distribution jet module 4 and reducing agent postinjection module 401 form by some spray guns, and some spray guns are uniformly distributed and are atomizing lance, and the spacing between each atomizing lance is be more than or equal to 300 millimeters.So can effectively control emitted dose and the spray site of reducing agent, effectively reduce the concentration of nitrogen oxides in effluent, improve denitration efficiency.
What be provided with dust arrester 8, the SCR reactor 5 both being connected between boiler 1 back-end ductwork with SCR reactor 5 entrance is arranged below air preheater 6, and the outlet of SCR reactor 5 is connected with air-introduced machine 7.It is provided with in economizer 101, SCR reactor 5 in boiler 1 back-end ductwork and is disposed with flying dust commutator 501, catalyst layer 502 and filter course 503 from top to bottom;Filter course 503 be arranged below the escaping of ammonia monitor 504 and nitrogen-oxide analyzer, 505.
The air inlet pipeline 9 both being connected it is provided with between dust arrester 8 with SCR reactor 5 entrance, the outlet pipe 10 both being connected it is provided with between the outlet of SCR reactor 5 with air-introduced machine 7, it is provided with the bypass line 11 both being connected between air inlet pipeline with outlet pipe, bypass line 11 is provided with bypass solenoid valve 12.Air inlet pipeline 9 is provided with air inlet electromagnetic valve 13, outlet pipe 10 is sequentially installed with SCR booster fan 14 and electromagnetic valve 15 of giving vent to anger.When SCR reactor 5 needs cleaning or keeps in repair, air inlet electromagnetic valve 13 and electromagnetic valve 15 of giving vent to anger can be closed, open bypass solenoid valve 12, make flue gas pass through bypass line 11 to air-introduced machine 7 and be discharged to next system, it is ensured that the motility of operation, it is simple to cleaning and maintenance.
Boiler flue gas denitration system carries out the technique of denitrating flue gas, comprises the following steps:
Reducing agent is prepared module 2 and by pipeline, the reductant solution prepared is delivered to reducing agent supply and controls device 3, supplied by reducing agent and control device 3 and be converted to, according to the ammonia requirement that SCR reactor 5 needs, the flow that reductant solution (i.e. amino acid solution) needs to provide, by conveyance conduit, reductant solution is delivered to respectively reducing agent distribution jet module 4 or reducing agent postinjection module 401 is sprayed.
Boiler 1 fuel combustion forms flue gas, the amino acid solution droplets mixing that flue gas ejects with reducing agent distribution jet module 4 or reducing agent postinjection module 401.The heat amino acid solution drop of mixed flue gas, so as to be decomposed into ammonia and carbon dioxide, subsequently, the mixing gas such as flue gas, ammonia enters economizer 101.
The mixing gas such as flue gas, ammonia then passes through dust arrester 8, enter back into SCR reactor 5, in mixing gas catalyst layer 502 in SCR reactor 5 under the effect of catalyst, nitrogen oxides in flue gas and ammonia generation chemical reduction reaction, produce nitrogen and water, it is discharged to next system, thus decreasing the flue gas pollution to environment finally by air-introduced machine 7.
Above an embodiment of the present utility model is described in detail, but described content has been only preferred embodiment of the present utility model, it is impossible to be considered for limiting practical range of the present utility model.All equalizations made according to this utility model application range change and improvement etc., all should still belong within patent covering scope of the present utility model.

Claims (7)

1. a boiler flue gas denitration system, it is characterised in that: include boiler (1), module (2) prepared by reducing agent, reducing agent supplies and control device (3), reducing agent distribution jet module (4), SCR reactor (5), air preheater (6) and air-introduced machine (7);
The supply of described reducing agent and control device (3) are positioned at boiler (1) outward, and prepare module (2) be connected with being positioned at boiler (1) reducing agent outward, described reducing agent distribution jet module (4) is connected with reducing agent supply and control device (3) by conveyance conduit, and described reducing agent distribution jet module (4) is positioned at boiler (1);
Described boiler (1) back-end ductwork is connected with the entrance of SCR reactor (5), described SCR reactor (5) be arranged below air preheater (6), and the outlet of SCR reactor (5) is connected with air-introduced machine (7), it is provided with economizer (101) in described boiler (1) back-end ductwork, in described SCR reactor (5), is disposed with flying dust commutator (501), catalyst layer (502) and filter course (503) from top to bottom;
The dust arrester both being connected (8) it is provided with between described boiler (1) back-end ductwork with SCR reactor (5) entrance, the air inlet pipeline both being connected (9) it is provided with between described dust arrester (8) with SCR reactor (5) entrance, the outlet pipe both being connected (10) it is provided with between the outlet of described SCR reactor (5) and air-introduced machine (7), it is provided with the bypass line both being connected (11) between described air inlet pipeline and outlet pipe, described bypass line (11) is provided with bypass solenoid valve (12).
2. a kind of boiler flue gas denitration system according to claim 1, it is characterized in that: described reducing agent distribution jet module (4) includes reducing agent postinjection module (401), the supply of described reducing agent and control device (3) are connected with two conveyance conduits, wherein one is delivered to reducing agent distribution jet module (4), and another is delivered to reducing agent postinjection module (401).
3. a kind of boiler flue gas denitration system according to claim 2, it is characterized in that: the conveyance conduit that the supply of described reducing agent and control device (3) are connected with reducing agent distribution jet module (4) and reducing agent postinjection module (401) respectively is provided with the first electric control valve (301) and the second electric control valve (302), and described first electric control valve (301) and the second electric control valve (302) control by controlling device.
4. a kind of boiler flue gas denitration system according to claim 2, it is characterised in that: described reducing agent postinjection module (401) is arranged on the flue before economizer (101).
5. a kind of boiler flue gas denitration system according to claim 2, it is characterized in that: described reducing agent distribution jet module (4) and reducing agent postinjection module (401) form by some spray guns, described some spray guns are uniformly distributed and are atomizing lance, and the spacing between each atomizing lance is be more than or equal to 300 millimeters.
6. a kind of boiler flue gas denitration system according to claim 1, it is characterised in that: described filter course (503) be arranged below the escaping of ammonia monitor (504) and nitrogen-oxide analyzer, (505).
7. a kind of boiler flue gas denitration system according to claim 1, it is characterized in that: described air inlet pipeline (9) is provided with air inlet electromagnetic valve (13), described outlet pipe (10) is sequentially installed with SCR booster fan (14) and electromagnetic valve of giving vent to anger (15).
CN201620083480.7U 2016-01-28 2016-01-28 Boiler flue gas denitration system Expired - Fee Related CN205386412U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620083480.7U CN205386412U (en) 2016-01-28 2016-01-28 Boiler flue gas denitration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620083480.7U CN205386412U (en) 2016-01-28 2016-01-28 Boiler flue gas denitration system

Publications (1)

Publication Number Publication Date
CN205386412U true CN205386412U (en) 2016-07-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019015572A1 (en) * 2017-07-17 2019-01-24 深圳市爱能森科技有限公司 Biomass combustion exhaust treatment system and process
CN110975599A (en) * 2019-10-30 2020-04-10 江苏天莱环保工程有限公司 In-furnace denitration system and process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019015572A1 (en) * 2017-07-17 2019-01-24 深圳市爱能森科技有限公司 Biomass combustion exhaust treatment system and process
CN110975599A (en) * 2019-10-30 2020-04-10 江苏天莱环保工程有限公司 In-furnace denitration system and process

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160720

Termination date: 20190128