CN213160195U

CN213160195U - Efficient flue gas dry method SNCR denitrification facility

Info

Publication number: CN213160195U
Application number: CN202021676239.8U
Authority: CN
Inventors: 王连宝
Original assignee: Changchun Qinglang Environmental Engineering Co ltd
Current assignee: Changchun Qinglang Environmental Engineering Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-05-11
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses an efficient flue gas dry process SNCR denitrification facility, concretely relates to environmental protection technology field, including denitration agent loading attachment, denitration agent storage device and denitration agent conveyor. The denitration agent conveying device comprises an extraction chamber, an acceleration chamber and a denitration spray gun. Compared with the prior art, the denitration agent and the flue gas can be fully mixed in the hearth, the NOx in the flue gas can be efficiently removed through complex chemical reaction, and finally the NOx in the flue gas is removed to the national specified emission index, so that the treatment efficiency is effectively improved, and the construction cost and the maintenance cost are greatly reduced.

Description

Efficient flue gas dry method SNCR denitrification facility

Technical Field

The utility model relates to a denitrification facility especially relates to an efficient flue gas dry process SNCR denitrification facility, belongs to the environmental protection technology field.

Background

The denitration device removes NOx generated during coal burning of the coal-fired boiler, and flue gas generated during fuel burning of the coal-fired boiler contains a large amount of NOx which needs to be treated in order to protect the environment, so that the pollution problem is fundamentally solved. The traditional denitration technology can adopt ammonia water, pure ammonia or urea as a reducing agent, and the difference in process is mainly reflected in two aspects: firstly, expensive metal catalysts need to be arranged in SCR, and catalysts are not needed in SNCR; secondly, SNCR has a so-called reaction temperature window, which is introduced in general literature, the optimal reaction temperature window is 850-1100 ℃, and the temperature window of SNCR denitration cannot be met due to the fact that the load of a heat supply boiler is unstable and is only 30% -50% of the boiler load in the daytime, so that the SNCR denitration has the problem that the boiler load is insufficient in the application of the heat supply chain boiler, ammonia escapes, and the blockage of an air preheater and an economizer is further caused. If the spraying amount of the sprayed denitration solution is improperly controlled, the efficiency of the boiler is even influenced, and the normal production of the boiler is influenced. The traditional SNCR flue gas denitration process for the heat supply boiler cannot meet strict emission reduction requirements, but the traditional SCR process has the defects of high equipment investment, large occupied area and the like, and the maintenance cost is high. Therefore, the development of a dry-method denitration device with simple and reliable process is of great significance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the problem that exists among the prior art, provide an efficient flue gas dry process SNCR denitrification facility, use through denitrification agent loading attachment, denitrification agent storage device and denitrification agent conveyor's cooperation, can get rid of the NOx in the flue gas high-efficiently, improve the treatment effeciency, greatly reduced construction cost and maintenance cost.

In order to realize the technical purpose, the technical effect is achieved, the utility model discloses a realize through following technical scheme:

an efficient flue gas dry SNCR denitration device comprises a denitration agent feeding device, a denitration agent storage device and a denitration agent conveying device, and the denitration agent feeding, storage and conveying functions are realized respectively;

the denitration agent feeding device comprises a hopper and a feeding machine; the inlet end of the feeding machine is arranged in the hopper, and the outlet end of the feeding machine is arranged right above the denitration agent storage device; the inlet end of the feeding machine is provided with a rectangular access hand hole, so that the maintenance is convenient;

the denitration agent storage device comprises a denitration bin and a denitration support; the denitration bin is of a cone bin type structure, and a cone is downwards arranged on the denitration support; an inlet of the denitration bin is hermetically connected with an outlet of the feeding machine, and an outlet of the denitration bin is connected with a manual gate valve through a bolt; a rapping device is arranged in the denitration bin conical hopper, and can effectively avoid hardening and blocking of the denitration agent; a high-low material level meter is arranged on the inner wall of the denitration bin, so that the material level condition in the denitration bin can be effectively monitored;

the denitration agent conveying device comprises an air extraction chamber, an acceleration chamber and a denitration spray gun; the extraction chamber is arranged below the manual gate valve, a metal corrugated expansion joint is fixedly connected between the extraction chamber and the manual gate valve through bolts, and the extraction chamber can enable the medicine to stably fall; the acceleration chamber is arranged below the air pumping chamber, and a rotary feeder is fixedly connected between the acceleration chamber and the air pumping chamber through bolts; an inlet of the acceleration chamber is connected with the Roots blower through a first pipeline, an outlet of the acceleration chamber is connected with a second pipeline, and a glass sight glass is further arranged at the outlet of the acceleration chamber, so that the conveying condition of the denitration medicament can be visually observed; the inlet end of the denitration spray gun is communicated with the second pipeline through a metal hose; the outlet end of the denitration spray gun is inserted into a boiler hearth; the acceleration chamber is provided with a circular opening, a steel pipe bent at 90 degrees is inserted in the opening and welded at the intersection; one end of the pipe orifice of the steel pipe is upwards opposite to the valve core of the rotary feeder and is welded and plugged by a steel plate with small holes; the other end of the pipe orifice of the steel pipe extends out of the acceleration chamber and is connected with a compressed air pipe network.

Preferably, a manual three-way valve is arranged on the second pipeline, so that the two furnaces can be freely switched.

Preferably, the second pipeline is provided with a pressure transmitter at the tail end.

Preferably, the denitration feed bin, the extraction chamber, the first pipeline, the second pipeline and the denitration spray gun are all made of stainless steel.

Compared with the prior art, the utility model beneficial effect lies in:

the utility model has novel design and reasonable structure, can control the blanking speed by adjusting the frequency through rotating the feeder, and meets various operating conditions; the denitration agent can be effectively prevented from being hardened and blocked by the rapping device; the conveying condition of the denitration medicament can be visually observed through a glass sight glass; the denitration spray gun can evenly convey the denitration agent to the reaction area, and the denitration efficiency of the equipment is ensured.

Drawings

FIG. 1 is a schematic structural diagram of the high-efficiency flue gas dry SNCR denitration device;

fig. 2 is a schematic structural diagram of the acceleration chamber.

The denitration device comprises a hopper 11, a feeding machine 12, a denitration bin 21, a denitration support 22, a manual gate valve 23, a shaking device 211, an extraction chamber 31, an acceleration chamber 32, a denitration spray gun 33, a metal corrugated expansion joint 311, a rotary feeder 321, a Roots blower 322, a first pipeline 323, a second pipeline 324, a boiler 331, a valve core 3211 and a steel pipe 5.

Detailed Description

The preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are not intended to limit the scope of the invention, but rather, are intended to cover all modifications and equivalents of the claims.

Referring to fig. 1, the utility model discloses an efficient flue gas dry-method SNCR denitration device, which comprises a denitration agent feeding device, a denitration agent storage device and a denitration agent conveying device, and realizes the functions of feeding, storing and conveying denitration agents respectively;

the denitration agent feeding device comprises a hopper 11 and a feeding machine 12; the inlet end of the feeding machine 12 is arranged in the hopper 11, and the outlet end of the feeding machine is arranged right above the denitration agent storage device; a rectangular access hand hole is formed at the inlet end of the feeding machine 12;

the denitration agent storage device comprises a denitration bin 21 and a denitration support 22; wherein, the denitration feed bin 21 is of a cone bin type structure, and the cone is downwards arranged on the denitration support 22; an inlet of the denitration bin 21 is hermetically connected with an outlet of the feeding machine 12, and an outlet of the denitration bin 21 is in bolted connection with a manual gate valve 23; the rapping device 211 is arranged in the conical hopper of the denitration bin 21, and the rapping device 211 can effectively avoid hardening and blocking of the denitration agent; a high-low material level meter is arranged on the inner wall of the denitration bin 21;

the denitration agent conveying device comprises an extraction chamber 31, an acceleration chamber 32 and a denitration spray gun 33; the extraction chamber 31 is arranged below the manual gate valve 23 and is connected with the denitration bin 21 through a circular tube, a metal corrugated expansion joint 311 is fixedly connected between the extraction chamber 31 and the manual gate valve 23 through bolts, and the extraction chamber 31 is arranged to enable the pesticide to stably fall; the acceleration chamber 32 is arranged below the extraction chamber 31, and a rotary feeder 321 is fixedly connected between the acceleration chamber 32 and the extraction chamber 31 through bolts; an inlet of the accelerating chamber 32 is connected with the Roots blower 322 through a first pipeline 323, an outlet of the accelerating chamber 32 is connected with a second pipeline 324, and a glass sight glass is further arranged at the outlet of the accelerating chamber 32, so that the conveying condition of the denitration medicament can be visually observed; the inlet end of the denitration spray gun 33 is communicated with the second pipeline 324 through a metal hose; the outlet end of the denitration spray gun 33 is inserted into a hearth of the boiler 331; referring to fig. 2, a circular opening is formed in the acceleration chamber 32, and a steel pipe 5 bent at 90 ° is inserted into the opening and welded at the intersection; one end of the pipe orifice of the steel pipe 5 is upwards opposite to the valve core 3211 of the rotary feeder 321 and is welded and blocked by a steel plate with small holes; the other end of the pipe orifice of the steel pipe 5 extends out of the accelerating chamber 32 and is connected with a compressed air pipe network.

Preferably, a manual three-way valve is arranged on each second pipeline 324, so that the two furnaces can be freely switched.

Preferably, the end of the second pipe 324 is provided with a pressure transmitter, so that the pressure parameter can be monitored in real time.

Preferably, the denitration bunker 21, the extraction chamber 31, the first pipe 323, the second pipe 324, and the denitration lance 33 are all made of stainless steel.

The specific operation control flow is as follows: referring to fig. 1, when denitration is performed, a feeding machine 12 conveys a denitration agent in a hopper 11 to a denitration bin 21, and when a material level reaches an upper threshold value of a high-low material level meter, feeding is stopped. Then, the roots blower 322 is started, the rotary feeder 321 is started, and the manual gate valve 23 is opened, so that the denitrifier is uniformly sprayed into the furnace chamber of the boiler 331 through the denitration spray gun 33 via the second pipeline 324, and finally, the denitrifier and the flue gas are chemically reacted to effectively remove the NOx in the flue gas.

According to the above, the utility model provides a pair of efficient flue gas dry process SNCR denitrification facility can handle according to unit operation situation in a flexible way and take off a sale agent supply flow, can not receive the change of unit fuel and load and influenced. And simultaneously, the utility model discloses simple structure, construction cycle is short, and the design takes up an area of and is less than the design area of traditional denitration far away, and is applicable to the denitration transformation of old factory very much.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and concepts of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an efficient flue gas dry method SNCR denitrification facility which characterized in that: comprises a denitration agent feeding device, a denitration agent storage device and a denitration agent conveying device;

the denitration agent feeding device comprises a hopper (11) and a feeding machine (12); the inlet end of the feeding machine (12) is arranged in the hopper (11), and the outlet end of the feeding machine is arranged right above the denitration agent storage device;

the denitration agent storage device comprises a denitration bin (21) and a denitration support (22); wherein the denitration feed bin (21) is of a cone bin type structure, and the cone is downwards arranged on the denitration support (22); an inlet of the denitration bin (21) is hermetically connected with an outlet of the feeding machine (12), and an outlet of the denitration bin (21) is in bolt connection with the manual gate valve (23); a shaking beater (211) is arranged in the conical hopper of the denitration bin (21);

the denitration agent conveying device comprises an extraction chamber (31), an acceleration chamber (32) and a denitration spray gun (33); the extraction chamber (31) is arranged below the manual gate valve (23), and a metal corrugated expansion joint (311) is fixedly connected between the extraction chamber (31) and the manual gate valve (23) through bolts; the acceleration chamber (32) is arranged below the extraction chamber (31), and a rotary feeder (321) is fixedly connected between the acceleration chamber (32) and the extraction chamber (31) through bolts; the inlet of the accelerating chamber (32) is connected with the Roots blower (322) through a first pipeline (323), and the outlet of the accelerating chamber (32) is connected with a second pipeline (324); the inlet end of the denitration spray gun (33) is communicated with the second pipeline (324) through a metal hose; the outlet end of the denitration spray gun (33) is inserted into a hearth of the boiler (331).

2. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: and a high-low material level meter is arranged on the denitration bin (21) along the inner wall of the denitration bin.

3. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: the inlet end of the feeding machine (12) is provided with a rectangular access hand hole.

4. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: the outlet of the accelerating chamber (32) is provided with a glass sight glass.

5. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: and a manual three-way valve is arranged on the second pipeline (324).

6. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: the tail end of the second pipeline (324) is provided with a pressure transmitter.

7. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: the accelerating chamber (32) is provided with a circular opening, a steel pipe (5) bent at 90 degrees is inserted in the opening and welded at the intersection; one end of the pipe orifice of the steel pipe (5) is upwards opposite to a valve core (3211) of the rotary feeder (321), and is welded and blocked by a steel plate with small holes; the other end of the pipe orifice of the steel pipe (5) extends out of the accelerating chamber (32) and is connected with a compressed air pipe network.

8. The efficient flue gas dry SNCR denitration device according to claim 1, characterized in that: the denitration feed bin (21), the extraction chamber (31), the first pipeline (323), the second pipeline (324) and the denitration spray gun (33) are all made of stainless steel.