CN110585911A

CN110585911A - SCR denitration device

Info

Publication number: CN110585911A
Application number: CN201910928720.7A
Authority: CN
Inventors: 王文骏
Original assignee: Xian Anmai Industrial Automation Technology Co Ltd
Current assignee: Xian Anmai Industrial Automation Technology Co Ltd
Priority date: 2019-09-28
Filing date: 2019-09-28
Publication date: 2019-12-20

Abstract

The invention relates to SCR denitration equipment which comprises a smoke inlet pipe, a flue, an ammonia screen, a denitration device, ammonia sprayers, a conveying pipe, an air pump and an ammonia storage tank. This novel SCR denitration device can realize carrying out denitration treatment to the flue gas through the denitrification facility that is equipped with, can control the blowout rate and the output quantity of ammonia shower nozzle through the controlling means who is equipped with to more effectually carry out denitration treatment to the flue gas, can realize catalyzing the flue gas through a plurality of catalysis layers that are equipped with, accelerate reaction rate, and a plurality of catalysis layers can successively act on, strengthen the effect of denitration, can realize removing dust to the flue gas through the dust collector who is equipped with.

Description

SCR denitration device

Technical Field

The invention relates to the technical field of denitration, in particular to SCR denitration equipment.

Background

At present, a newly built power plant usually adopts a Selective Catalytic Reduction (SCR) process for denitration. The SCR denitration system generally consists of an SCR reactor, a catalyst module, an ammonia storage and supply system, an ammonia injection system, an economizer bypass, an SCR bypass, and related test control systems. Wherein the catalyst module is placed in the flue of the SCR reactor in the form of a fixed bed, and in the upstream region of the fixed bed of catalyst NH3 is injected into the flue to mix with the flue gases. When the flue gas flows through the catalyst fixed bed, NH3 reacts with nitrogen oxides in the flue gas under the participation of the catalyst to generate N2, so that denitration is realized. The SCR process has good denitration effect but large investment, and requires a catalyst module to have good pollution resistance to resist the adverse effects of SO2 and H2O; it is also desired to have good thermal shock resistance and mechanical strength properties.

In addition, the SCR reactor needs to be arranged between the boiler and the dust remover, and the SCR reactor is large in size, so that no enough space can be used between the boiler and the dust remover of an old power plant in China, and the SCR process cannot be adopted for denitration. In addition, the existing SCR system has the defect that the catalytic effect is rapidly reduced after the SCR system works for a period of time. Therefore, there is a need to develop a new flue gas denitration apparatus and a flue gas denitration method, and these problems are to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide SCR denitration equipment to improve the problems in the background art.

In order to improve the problems, the invention is embodied by the following technical scheme: the utility model provides a SCR denitration device, includes into tobacco pipe, flue, ammonia screen cloth, denitrification facility, ammonia shower nozzle, conveyer pipe, air pump and ammonia holding vessel, novel SCR denitration device comprises denitrification facility, controlling means, catalysis flue and dust collector jointly, advance flue upper end and flue lower extreme fixed connection, flue upper end and denitrification facility fixed connection, denitrification facility inside is fixed and is equipped with a plurality of ammonia shower nozzles, and is a plurality of ammonia shower nozzle upper end and conveyer pipe lower extreme fixed connection, conveyer pipe upper end and ammonia holding vessel fixed connection, fixed mounting has the air pump between ammonia holding vessel and the conveyer pipe, the fixed controlling means that is equipped with in denitrification facility right side, flue upper portion right side link up with catalysis flue left end, the inside fixed catalysis layer that is equipped with of catalysis flue, the catalysis layer includes first catalysis layer, air pump, denitration device, The device comprises a first catalytic layer, a second catalytic layer and a third catalytic layer, wherein the first catalytic layer and the second catalytic layer alternately appear, the right lower end of the catalytic flue is fixedly provided with an electrostatic dust collection device, and a smoke outlet pipe is fixedly arranged below the electrostatic dust collection device.

As a preferred embodiment of the invention, the middle part of the flue is fixedly provided with an ammonia screen.

In a preferred embodiment of the present invention, a PLC controller is fixedly installed inside the control device.

As a preferred embodiment of the present invention, the first catalytic layer is fixedly connected to the inner lower wall of the catalytic flue, the second catalytic layer is fixedly connected to the inner upper wall of the catalytic flue, the third catalytic layer is fixedly connected to both the inner upper wall and the inner lower wall of the catalytic flue, and the first catalytic layer is internally provided with a plurality of honeycomb-shaped holes.

In a preferred embodiment of the present invention, an electrostatic precipitator is fixedly installed on both sides inside the dust removing device.

The invention has the beneficial effects that: the invention relates to SCR denitration equipment which comprises a smoke inlet pipe, a flue, an ammonia screen, a denitration device, an ammonia sprayer, a conveying pipe, an air pump, an ammonia storage tank, a control device, a PLC (programmable logic controller), a catalytic flue, a first catalytic layer, a second catalytic layer, a third catalytic layer, a dust removal device, an electrostatic dust remover and a smoke outlet pipe.

1. This novel SCR denitration device can realize carrying out denitration treatment to the flue gas through the denitrification facility that is equipped with, can control the blowout rate and the output quantity of ammonia shower nozzle through the controlling means that is equipped with to more effectual denitration treatment carries out the flue gas.

2. This novel SCR denitration device can realize catalyzing the flue gas through a plurality of catalysis layers that are equipped with for reaction rate to a plurality of catalysis layers can successively act on, strengthen the effect of denitration, can realize removing dust to the flue gas through the dust collector who is equipped with.

The invention makes up for the defects in the background technology to a certain extent.

Drawings

FIG. 1 is a schematic view of the overall structure of an SCR denitration apparatus according to the present invention;

FIG. 2 is a schematic view of a partial structure of an SCR denitration apparatus according to the present invention;

in the figure: 1. the device comprises a smoke inlet pipe, a smoke flue, a smoke inlet pipe, a smoke screen, an ammonia screen, a denitration device, a smoke outlet pipe, a smoke inlet pipe, a smoke flue, a smoke screen, a denitration device, a smoke nozzle, a smoke outlet pipe, a conveying pipe, a gas pump, an ammonia storage tank, a control device, a PLC (programmable logic controller), a catalytic smoke flue, a first catalytic layer, a second catalytic layer, a 14 catalytic layer, a third catalytic layer, a 15, a dust removal device.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1 to 2, the present invention provides a technical solution: an SCR denitration device comprises a smoke inlet pipe 1, a flue 2, an ammonia screen 3, a denitration device 4, ammonia nozzles 5, a conveying pipe 6, an air pump 7 and an ammonia storage tank 8, wherein the novel SCR denitration device is composed of the denitration device 4, a control device 9, a catalytic flue 11 and a dust removal device 15, the upper end of the smoke inlet pipe 1 is fixedly connected with the lower end of the flue 2, the upper end of the flue 2 is fixedly connected with the denitration device 4, the denitration device 4 is internally and fixedly provided with a plurality of ammonia nozzles 5, the upper ends of the ammonia nozzles 5 are fixedly connected with the lower end of the conveying pipe 6, the upper end of the conveying pipe 6 is fixedly connected with the ammonia storage tank 8, the air pump 7 is fixedly arranged between the ammonia storage tank 8 and the conveying pipe 6, the right side of the denitration device 4 is fixedly provided with the control device 9, and the right side of the upper part of the flue, the catalytic flue 11 is internally and fixedly provided with a catalytic layer, the catalytic layer comprises a first catalytic layer 12, a second catalytic layer 13 and a third catalytic layer 14, the first catalytic layer 12 and the second catalytic layer 13 alternately appear, the right lower end of the catalytic flue 11 is fixedly provided with an electrostatic dust collection device 15, and a smoke outlet pipe 17 is fixedly arranged below the electrostatic dust collection device 15.

The working principle is as follows: novel SCR denitration device is when using, can realize carrying out denitration treatment to the flue gas through the denitrification facility 4 that is equipped with, controlling means 9 through being equipped with can control the blowout speed and the output quantity of ammonia shower nozzle 5, thereby more effectually carry out denitration treatment to the flue gas, can realize catalyzing the flue gas through a plurality of catalysis layers that are equipped with, accelerate reaction rate, and a plurality of catalysis layers can successively act on, strengthen the effect of denitration, can realize removing dust to the flue gas through the dust collector 15 that is equipped with.

In a preferred embodiment of the present invention, an ammonia screen 3 is fixedly installed in the middle of the flue 2.

In a preferred embodiment of the present invention, a PLC controller 10 is fixedly installed inside the control device 9.

As a preferred embodiment of the present invention, the first catalytic layer 12 is fixedly connected to the inner lower wall of the catalytic flue 11, the second catalytic layer 13 is fixedly connected to the inner upper wall of the catalytic flue 11, the third catalytic layer 14 is fixedly connected to both the inner upper wall and the inner lower wall of the catalytic flue 11, and the first catalytic layer 12 is provided with a plurality of honeycomb-shaped holes therein.

In a preferred embodiment of the present invention, an electrostatic precipitator 16 is fixedly installed on both sides inside the dust removing device 15.

The invention is mainly characterized in that: this novel SCR denitration device can realize carrying out denitration treatment to the flue gas through the denitrification facility 4 that is equipped with, can control the blowout rate and the output quantity of ammonia shower nozzle 5 through the controlling means 9 that is equipped with to more effectual carries out denitration treatment to the flue gas.

Compare with patent 201820941627.0, 201721820707.2, 201721000224.8, this SCR denitration device can realize catalyzing the flue gas through a plurality of catalysis layers that are equipped with for reaction rate, and a plurality of catalysis layers can successively act on, strengthen the effect of denitration, can realize removing dust to the flue gas through the dust collector 15 that is equipped with.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a SCR denitration device, includes into tobacco pipe (1), flue (2), ammonia screen cloth (3), denitrification facility (4), ammonia shower nozzle (5), conveyer pipe (6), air pump (7) and ammonia holding vessel (8), its characterized in that: the novel SCR denitration device is composed of a denitration device (4), a control device (9), a catalytic flue (11) and a dust removal device (15) together, wherein the upper end of the flue (1) is fixedly connected with the lower end of the flue (2), the upper end of the flue (2) is fixedly connected with the denitration device (4), a plurality of ammonia sprayers (5) are fixedly arranged in the denitration device (4), the upper ends of the ammonia sprayers (5) are fixedly connected with the lower end of a conveying pipe (6), the upper end of the conveying pipe (6) is fixedly connected with an ammonia storage tank (8), an air pump (7) is fixedly arranged between the ammonia storage tank (8) and the conveying pipe (6), the control device (9) is fixedly arranged on the right side of the denitration device (4), the right side of the upper part of the flue (2) is communicated with the left end of the catalytic flue (11), a catalytic layer is fixedly arranged in the catalytic flue, the catalytic layer comprises a first catalytic layer (12), a second catalytic layer (13) and a third catalytic layer (14), the first catalytic layer (12) and the second catalytic layer (13) appear alternately, an electrostatic dust collection device (15) is fixedly installed at the right lower end of the catalytic flue (11), and a smoke outlet pipe (17) is fixedly arranged below the electrostatic dust collection device (15).

2. The SCR denitration device of claim 1, wherein an ammonia screen (3) is fixedly arranged in the middle of the flue (2).

3. An SCR denitration device according to claim 1, characterized in that a PLC controller (10) is fixedly arranged in the control device (9).

4. The SCR denitration device according to claim 1, wherein the first catalytic layer (12) is fixedly connected with the inner lower wall of the catalytic flue (11), the second catalytic layer (13) is fixedly connected with the inner upper wall of the catalytic flue (11), the third catalytic layer (14) is fixedly connected with the inner upper wall and the inner lower wall of the catalytic flue (11), and a plurality of honeycomb-shaped holes are formed in the first catalytic layer (12).

5. The SCR denitration device of claim 1, wherein the electrostatic precipitator (16) is fixedly arranged at two sides inside the dust removing device (15).