CN209060876U - Coal-fired electric boiler SNCR-SCR combined denitration system - Google Patents
Coal-fired electric boiler SNCR-SCR combined denitration system Download PDFInfo
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- CN209060876U CN209060876U CN201821663385.XU CN201821663385U CN209060876U CN 209060876 U CN209060876 U CN 209060876U CN 201821663385 U CN201821663385 U CN 201821663385U CN 209060876 U CN209060876 U CN 209060876U
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Abstract
The utility model is about a kind of coal-fired electric boiler SNCR-SCR combined denitration system, including urea extraction element, urea dissolving tank and urea storage tank, urea dissolving tank is equipped with pressure transmitter, the water level of the pressure transmitter control urea dissolving tank, the water inlet of urea dissolving tank is connect with softening waterpipe, the outlet of urea dissolving tank is connect by delivery pump with urea storage tank, agitating device is equipped in urea dissolving tank, urea storage tank is connect by urea conveyance conduit with spray gun, spray gun is arranged in boiler furnace, boiler is equipped with the infrared radiation thermometer of detection boiler hearth temperature, spray gun is connect by compressed air pipe with air compressor, the exhanst gas outlet of boiler is equipped with oxynitrides content detection device, the exhanst gas outlet of boiler connects SCR denitration reaction device.The coal-fired electric boiler SNCR-SCR combined denitration system denitrification rate of the utility model reaches 85% or more, and catalyst usage amount is low, and SCR denitration reaction device volume is small.
Description
Technical field
The utility model relates to a kind of denitrification apparatus, more particularly to a kind of coal-fired electric boiler SNCR-SCR combined denitration system
System.
Background technique
There are also a large amount of oxynitrides in boiler smoke, if oxynitrides is directly discharged to will form acid in atmosphere
Rain and photochemical fog, and then off-lying sea human health, therefore boiler smoke is needed before discharging by denitration process.Denitrating flue gas
Technology mainly includes selective catalytic reduction (SCR) method and non-reduced denitration (SNCR) method of selectivity at present.Selectivity is non-reduced
Denitration (SNCR) method denitrification rate is lower, and selective catalytic reduction (SCR) needs when denitration to disappear although method denitration denitrification rate is higher
The catalyst of consumption is more, causes SCR denitration reaction device equipment volume larger.
Utility model content
The main purpose of the utility model is that providing a kind of coal-fired electric boiler SNCR-SCR combined denitration system,
The technical issues of solution is to reduce catalyst usage amount, reaches standard limit of smog release after making denitration of boiler smoke, thus more suitable
In practical.
It the purpose of this utility model and solves its technical problem and adopts the following technical solutions to realize.It is practical according to this
A kind of coal-fired electric boiler SNCR-SCR combined denitration system of novel proposition, including urea extraction element, urea dissolving tank and urine
Urea is discharged into the urea dissolving tank by plain storage tank, the urea extraction element, and the urea dissolving tank is equipped with pressure inverting
The water inlet of device, the water level of the pressure transmitter control urea dissolving tank, the urea dissolving tank is connect with softening waterpipe,
The outlet of the urea dissolving tank is connect by delivery pump with the urea storage tank, is equipped with and is stirred in the urea dissolving tank
Device is mixed, the urea storage tank is connect by urea conveyance conduit with spray gun, and the spray gun is arranged in boiler furnace, institute
The infrared radiation thermometer that boiler is equipped with detection boiler hearth temperature is stated, the spray gun is connected by compressed air pipe and air compressor
It connects, the exhanst gas outlet of the boiler is equipped with oxynitrides content detection device, and the exhanst gas outlet of the boiler connects SCR denitration
Reactor.
It the purpose of this utility model and solves its technical problem also following technical measures can be used to further realize.
Preferably, coal-fired electric boiler SNCR-SCR combined denitration system above-mentioned, wherein the urea dissolving tank is equipped with
Liquidometer.
Preferably, coal-fired electric boiler SNCR-SCR combined denitration system above-mentioned, wherein the softened water pipeline be equipped with into
Penstock.
Preferably, coal-fired electric boiler SNCR-SCR combined denitration system above-mentioned, wherein the urea extraction element includes
Motor, pulley, sliding rail, chain, dump skip, the dump skip are mounted on the sliding rail by chain and pulley, the motor
Make dump skip discharging by control pulley and chain.
By above-mentioned technical proposal, the utility model fire coal electric boiler SNCR-SCR combined denitration system at least has following
Advantage:
The coal-fired electric boiler SNCR-SCR combined denitration system of the utility model is high to denitration of boiler smoke rate, denitrification rate
Reach 85% or more；Urea liquid reduces the oxynitrides in boiler in the utility model, makes to enter SCR denitration reaction device
Oxynitrides content reduce；The part ammonia that urea liquid generates in boiler enters SCR denitration reaction device with flue gas, into
One step reduction of nitrogen oxide, makes reactant be fully used, and reduces the catalyst in SCR denitration, keeps SCR denitration anti-
Answer the smaller volume of device.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
It describes in detail bright as after.
Detailed description of the invention
Fig. 1 is the schematic diagram of the coal-fired electric boiler SNCR-SCR combined denitration system of the utility model.
Specific embodiment
Further to illustrate that the utility model is the technical means and efficacy reaching predetermined purpose of utility model and being taken,
Below in conjunction with attached drawing and preferred embodiment, to according to the utility model proposes coal-fired electric boiler SNCR-SCR combined denitration system
Its specific embodiment, feature, structure and its effect, detailed description is as follows.In the following description, different " embodiment " or
What " embodiment " referred to is not necessarily the same embodiment.In addition, special characteristic, structure or feature in one or more embodiments can be by
Any suitable form combination.
Following embodiment material therefor, method and instrument, without specified otherwise, be this field conventional material, method and
Instrument, those of ordinary skill in the art can be obtained by commercial channel.
The utility model in following description, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper",
The indicating positions such as "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outside" and " endways " or positional relationship are base
In orientation or positional relationship shown in the drawings, be merely for convenience of describing the present invention and simplifying the description, rather than indicate or
Imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, it is thus impossible to be interpreted as
Limitations of the present invention.
The utility model in following description, it should be noted that unless otherwise expressly provided with limit, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be and be directly connected to, be also possible to be indirectly connected with by intermediate medium, can be the connection of two components interiors.It is right
For those skilled in the art, can be concrete condition understand submit a written statement to a higher authority term in the present invention specifically contain
Justice.
In addition, the utility model in following description, unless otherwise indicated, " multiple ", " multiple groups ", the meaning of " more "
It is two or more.
The utility model is described in further details with reference to the accompanying drawing, but following detailed description is not intended as to originally practical
Novel restriction.
As shown in Figure 1, one embodiment of the utility model proposes a kind of coal-fired electric boiler SNCR-SCR combined denitration system
Urea is discharged into urea and dissolved by system, including urea extraction element 1, urea dissolving tank 2 and urea storage tank 3, urea extraction element 1
In tank 2, urea dissolving tank 2 is equipped with pressure transmitter 021, and pressure transmitter 021 controls the water level of urea dissolving tank 2, and urea is molten
The water inlet for solving tank 2 is connect with softening waterpipe 4, and the outlet of urea dissolving tank 2 is connect by delivery pump 5 with urea storage tank 6,
2 are equipped with agitating device 022 in urea dissolving tank, and urea storage tank 6 is connect by urea conveyance conduit with spray gun 7, urea conveying
Pipeline is equipped with urea liquid rear pump 8, and flue gas and flame critical point area is arranged in boiler furnace 9 in the spray head of spray gun 7, and boiler is set
There is the infrared radiation thermometer 091 of detection boiler hearth temperature, spray gun 7 is connect by compressed air pipe 10 with air compressor 11,
The exhanst gas outlet 12 of boiler is equipped with oxynitrides content detection device 13, and the exhanst gas outlet 12 of boiler connects SCR denitration reaction
Device 14.
Preferably, the urea dissolving tank of the utility model is equipped with liquidometer.
Preferably, the softening waterpipe in the utility model is equipped with inlet valve 041.
Preferably, the urea extraction element in the utility model includes motor, pulley, sliding rail, chain, dump skip, unload
Hopper is mounted on the sliding rail by chain and pulley, and motor makes dump skip discharging by control pulley and chain, wherein
Under the action of motor, pulley lifting chain enters the dump skip on chain in the defeated dissolving tank of urea, and inclination dump skip makes to unload
Urea in hopper is discharged into the defeated dissolving tank of urea.
The coal-fired electric boiler SNCR-SCR combined denitration System Working Principle of the utility model: softened water passes through softening water pipe
Road is delivered in urea dissolving tank, and the input quantity of softened water in urea dissolving tank is controlled by pressure transmitter, is mentioned by urea
It takes device that industrial urea is discharged into urea dissolving tank, starts agitating device, it is molten to prepare the urea that mass concentration is 10%-20%
Configured urea is pumped to plain storage tank by conveying, by urea liquid rear pump by the urine in urea storage tank by liquid
Element is input to spray gun, while starting air compressor, is atomized urea liquid by spray gun under the airflow function of air compressor
Be ejected into boiler flue and flame critical point area, chemically reacted with the oxynitrides in flue gas, obtain nitrogen gas and water and
Part ammonia, the flue gas after reaction enter flue, and flue is equipped with oxynitride concentration detector, in flue
Flue gas enter carry out SCR denitration reaction device carry out catalytic reduction reaction.The coal-fired electric boiler SNCR-SCR of the utility model joins
It closes denitrating system denitrification rate and reaches 85% or more, catalyst usage amount is low, and SCR denitration reaction device volume is small.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, any simple modification, equivalent change and modification made by the above technical examples according to the technical essence of the present invention,
It is still within the scope of the technical solutions of the present invention.
Claims (4)
1. a kind of fire coal electric boiler SNCR-SCR combined denitration system, including urea extraction element, urea dissolving tank and urea are deposited
Storage tank, it is characterised in that: urea is discharged into the urea dissolving tank by the urea extraction element, and the urea dissolving tank is equipped with pressure
Power transmitter, the water level of the pressure transmitter control urea dissolving tank, the water inlet and softening water pipe of the urea dissolving tank
The outlet of road connection, the urea dissolving tank is connect by delivery pump with the urea storage tank, the urea dissolving tank
Interior to be equipped with agitating device, the urea storage tank is connect by urea conveyance conduit with spray gun, and the spray gun is arranged in boiler
In burner hearth, the boiler is equipped with the infrared radiation thermometer of detection boiler hearth temperature, and the spray gun passes through compressed air pipe and sky
The exhanst gas outlet of air compressor connection, the boiler is equipped with oxynitrides content detection device, the exhanst gas outlet of the boiler
Connect SCR denitration reaction device.
2. fire coal electric boiler SNCR-SCR combined denitration system according to claim 1, which is characterized in that the urea is molten
It solves tank and is equipped with liquidometer.
3. fire coal electric boiler SNCR-SCR combined denitration system according to claim 1, which is characterized in that the softened water
Pipeline is equipped with inlet valve.
4. fire coal electric boiler SNCR-SCR combined denitration system according to claim 1, which is characterized in that the urea
Extraction element includes motor, pulley, sliding rail, chain, dump skip, and the dump skip is mounted on the sliding rail by chain and pulley
On, the motor makes dump skip discharging by control pulley and chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821663385.XU CN209060876U (en) | 2018-10-15 | 2018-10-15 | Coal-fired electric boiler SNCR-SCR combined denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821663385.XU CN209060876U (en) | 2018-10-15 | 2018-10-15 | Coal-fired electric boiler SNCR-SCR combined denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209060876U true CN209060876U (en) | 2019-07-05 |
Family
ID=67094681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821663385.XU Active CN209060876U (en) | 2018-10-15 | 2018-10-15 | Coal-fired electric boiler SNCR-SCR combined denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209060876U (en) |
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2018
- 2018-10-15 CN CN201821663385.XU patent/CN209060876U/en active Active
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