CN112657333A - Ammonia spraying and uniformly distributing device and denitration ammonia spraying system - Google Patents

Ammonia spraying and uniformly distributing device and denitration ammonia spraying system Download PDF

Info

Publication number
CN112657333A
CN112657333A CN202011463158.4A CN202011463158A CN112657333A CN 112657333 A CN112657333 A CN 112657333A CN 202011463158 A CN202011463158 A CN 202011463158A CN 112657333 A CN112657333 A CN 112657333A
Authority
CN
China
Prior art keywords
ammonia
flue gas
ammonia injection
pipe
shaped
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.)
Granted
Application number
CN202011463158.4A
Other languages
Chinese (zh)
Other versions
CN112657333B (en
Inventor
耿明山
任乐
金锐
向继涛
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.)
Capital Engineering & Research Inc Ltd
Original Assignee
Capital Engineering & Research Inc Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Capital Engineering & Research Inc Ltd filed Critical Capital Engineering & Research Inc Ltd
Priority to CN202011463158.4A priority Critical patent/CN112657333B/en
Publication of CN112657333A publication Critical patent/CN112657333A/en
Application granted granted Critical
Publication of CN112657333B publication Critical patent/CN112657333B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Treating Waste Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

本发明提供了一种喷氨均布装置及脱硝喷氨系统,喷氨均布装置包括喷氨主管和多个结构相同且间隔均布的喷氨单元,每个喷氨单元均包括:喷氨支管,喷氨支管的入口与喷氨主管连接;工字形支管,具有第一入口和多个第一出口,第一入口位于工字形支管的对称中心处,多个第一出口与工字形支管的端部一一对应,喷氨支管的出口与第一入口连接;多个X形分布器,与多个第一出口一一对应连接,每个X形分布器均包括第二入口和多个第二出口,第二入口位于X形分布器的对称中心处,第二出口与X形分布器的端部一一对应,每个X形分布器的第二入口均与对应的第一出口连通;多个喷嘴,每个第二出口处均对应连接有一个喷嘴。本发明能提高脱硝效率。

Figure 202011463158

The invention provides an ammonia injection uniform distribution device and a denitrification ammonia injection system. The ammonia injection uniform distribution device includes an ammonia injection main pipe and a plurality of ammonia injection units with the same structure and uniform intervals. Each ammonia injection unit includes: ammonia injection Branch pipe, the inlet of the ammonia injection branch pipe is connected with the main pipe of ammonia injection; The ends are in one-to-one correspondence, and the outlet of the ammonia injection branch pipe is connected with the first inlet; a plurality of X-shaped distributors are connected with a plurality of first outlets in a one-to-one correspondence, and each X-shaped distributor includes a second inlet and a plurality of first outlets. Two outlets, the second inlet is located at the symmetrical center of the X-shaped distributor, the second outlet is in one-to-one correspondence with the end of the X-shaped distributor, and the second inlet of each X-shaped distributor communicates with the corresponding first outlet; A plurality of nozzles are connected with each second outlet correspondingly. The invention can improve the denitration efficiency.

Figure 202011463158

Description

Ammonia spraying and uniformly distributing device and denitration ammonia spraying system
Technical Field
The invention relates to the field of denitration of flue gas or industrial tail gas, in particular to an ammonia spraying uniform distribution device and a denitration ammonia spraying system.
Background
Nitrogen oxides (NOx) are a major class of atmospheric pollutants and are one of the major contributors to the formation of acid rain, photochemical smog, and PM2.5 pollution. A large amount of SO is generated in the process of burning coal2And the air pollutants such as NOx are easy to cause serious air pollution and economic loss. The denitration in the prior art mainly aims at removing Nitric Oxide (NO) and nitrogen dioxide (NO)2)。
In SO2And NOx removal is greater than SO removal2Therefore, the simultaneous desulfurization and denitrification techniques can be roughly classified into two types from the viewpoint of NOx. The first type is a catalytic reduction method, which mainly utilizes a catalyst, a reducing agent and the like to reduce NOx so as to realize simultaneous desulfurization and denitrification; the second type is oxidation absorption method, which mainly uses various strong oxidants and active free radicals to oxidize NO insoluble in water to generate NO2,SO2And NO2Subsequent simultaneous absorption, strong oxidants include NaClO2、ClO2、HClO3、KMnO4、H2O2Etc., the free radicals include O2 -、OH-、O3And the like, and the generation technologies thereof include electron beam technology, pulsed corona discharge, and radical cluster lamp. The nitrogen oxide is difficult to remove, and the nitrogen dioxide is easy to remove. Therefore, the technology for converting nitric oxide into nitrogen dioxide is more critical.
At present, the desulfurization and denitrification technologies widely used at home and abroad comprise wet limestone and gypsum Flue Gas Desulfurization (FGD) and NH3A combination of selective catalytic reduction denitration technology (SCR) and an activated carbon adsorption catalysis method.
Wherein the SCR is widely applied to denitration of coal-fired power plants, a temperature window of 300-400 ℃ is needed, and NOx is in a catalyst and NH3Is reduced to N2The denitration efficiency can reach more than 90%; the activated carbon adsorption catalysis method utilizes the adsorption and catalysis effects of activated carbon, the application temperature is about 200 ℃, and the denitration efficiency is about 50-70% under the condition of ammonia spraying; in thatIn the field of low-temperature denitration, the SCR needs to heat flue gas, and the technical cost of the activated carbon is high.
Although the desulfurization and denitrification efficiency of the technology is high, the investment and operation cost are high, the requirements of the catalyst in the SCR denitrification process on the process conditions are strict, the special requirements including the flue gas temperature and the dust characteristics in the flue gas exist, and the catalyst is easy to be poisoned and failed, so that the operation cost of an SCR system is high.
For a selective catalytic reduction method, two performance parameters of denitration efficiency and ammonia escape rate are mainly improved by two means: 1. the catalytic reduction capability of the catalyst is improved; 2. improving the flue gas distribution and NOx/NH at the inlet of the catalyst layer3(NOx means nitrogen oxide, NH)3Representing ammonia) uniformity.
The catalytic reduction capability of the catalyst is improved mainly by means of improving the formula of the catalyst, increasing the dosage of the catalyst and the like; and catalyst layer inlet flue gas distribution and NOx/NH3The uniformity of the ammonia injection grid is realized by optimizing a flue guide plate of the denitration device and adjusting the design of the ammonia injection grid, wherein the ammonia injection grid is used for treating NOx/NH in flue gas of the denitration device3Is particularly critical.
In an SCR flue gas denitration system, the injection and mixing of a reducing agent ammonia gas are important components of the whole system. Usually, the ammonia injection and mixing adopts an ammonia injection grid or a static mixer so as to achieve the purpose of uniformly mixing the ammonia gas and the flue gas. In the design of a denitration system, the sufficient mixing of ammonia and nitrogen oxides is a key factor, and the uneven mixing can cause lower denitration rate or higher escape ammonia amount. The effect of this mixing is only a rough type of control, while the distribution of ammonia is significantly uneven and cannot be controlled locally and fine tuned.
The ammonia injection grid commonly used in the prior art is composed of a plurality of parallel ammonia injection pipes, and each ammonia injection pipe is provided with a plurality of ammonia gas nozzles. In actual industrial production, the ammonia spraying amount of different ammonia nozzles on different ammonia spraying pipes is greatly different, and the distribution of ammonia on the cross section of a flue is extremely uneven due to the influence of comprehensive factors such as on-way resistance of a pipeline and uneven distribution of flue gas flow velocity on the cross section of the flue, so that the denitration efficiency is seriously influenced, and the ammonia escape rate is increased.
The common ammonia injection device configuration type of current SCR denitrification facility is the ammonia injection grid of equipartition formula. The basic principle is that a plurality of subareas with the same size are designed and planned in the denitration inlet flue, and a plurality of groups of nozzles are uniformly distributed in the subareas. Each partition corresponds to an ammonia injection branch pipe, and a valve is arranged on the ammonia injection branch pipe and used for manual adjustment.
But along with the continuous improvement of the environmental protection requirement, the requirement of ultra-clean and even ultra-clean flue gas denitration is provided, when the requirement of the flue gas denitration device on the denitration efficiency is more than 90%, the efficiency can not be further improved by simply increasing the dosage of the catalyst, and the NOx/NH is required to be carried out3Higher requirements for uniformity, NH3/NOXThe deviation of the molar ratio distribution needs to be up to + -3% or even less.
In the face of such high NH3/NOXThe requirement for the deviation of the molar ratio distribution, the current ammonia-injection grid pattern, begins to expose its disadvantages:
1. when the deviation of the flue gas flow field is large, the ammonia gas flow required by a plurality of local injection branch pipes is too large or too small and exceeds the adjustment range; the flow rate of the locally sprayed ammonia gas is too much or too little relative to the flow rate of the flue gas, so that the denitration efficiency is not high.
2. Ammonia is unevenly distributed on the cross section, and the dynamic adjustment of local ammonia flow cannot be realized; the ordinary stop valve that the valve of ammonia injection branch pipe adopted, the regulation performance is relatively poor, can't satisfy the regulation required precision.
3. The flow distribution of each nozzle on a single branch pipe is uneven, the air flow velocity near the inlet of the branch pipe is high, the flow is high, and the air flow velocity at the tail end of the branch pipe is low and the air flow is insufficient.
4. Flue gas and ammonia gas are not well mixed in laminar flow and turbulent flow states.
5. The spoiler is arranged, so that resistance loss of air flow is increased, the equipment is high in processing and manufacturing difficulty, high in mounting precision requirement and inconvenient to maintain and overhaul.
6. The mode of adopting the tapered branch pipe can only be suitable for gas distribution under a certain flow condition, the gas distribution under different flow conditions still has nonuniformity, the processing and manufacturing difficulty of the branch pipe is large, and the precision requirement is high.
The increase of the escape rate of ammonia not only reduces the denitration efficiency, but also causes the blockage and corrosion of the denitration device. Therefore, a new ammonia injection grid which is reasonable in design and suitable for application is urgently needed, the uniform mixing of ammonia gas and nitric oxide in a flue is ensured, the denitration efficiency is further improved, and the ammonia escape rate is reduced.
Disclosure of Invention
The invention provides an ammonia injection uniform distribution device and a denitration ammonia injection system, which aim to improve the denitration efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a spout ammonia equipartition device, is responsible for and a plurality of structure the same and interval equipartition spout the ammonia unit including spouting the ammonia, and every spouts the ammonia unit and all includes: the inlet of the ammonia spraying branch pipe is connected with the ammonia spraying main pipe; the I-shaped branch pipe is provided with a first inlet and a plurality of first outlets, the first inlet is positioned at the symmetrical center of the I-shaped branch pipe, the plurality of first outlets correspond to the end parts of the I-shaped branch pipe one by one, and the outlets of the ammonia spraying branch pipe are connected with the first inlets; the X-shaped distributors are connected with the first outlets in a one-to-one correspondence mode, each X-shaped distributor comprises a second inlet and a plurality of second outlets, the second inlets are located at the symmetrical centers of the X-shaped distributors, the second outlets are in one-to-one correspondence with the end portions of the X-shaped distributors, and the second inlets of the X-shaped distributors are communicated with the corresponding first outlets; and each second outlet is correspondingly connected with one nozzle.
Furthermore, a first regulating valve and a flow meter are arranged on the ammonia injection branch pipe of each ammonia injection unit.
Further, the ammonia spraying main pipe comprises a first main pipe, a second main pipe and a third main pipe which are sequentially connected, wherein the inner diameter of the first main pipe is larger than that of the second main pipe, and the inner diameter of the second main pipe is larger than that of the third main pipe.
Further, the inlet end of the first main pipe is provided with a second regulating valve for controlling the opening degree of the ammonia spraying main pipe.
Further, the ammonia spraying and uniformly distributing device also comprises a control assembly which is connected with the first regulating valve and the second regulating valve.
Further, the nozzle includes: the small-diameter end of the circular truncated cone-shaped spray pipe is connected with the second outlet; the arc guide plate is fixedly connected with the large-diameter end of the circular truncated cone-shaped spray pipe through the circular seam supporting piece.
Furthermore, the nozzle also comprises a flow equalizing plate which is provided with a plurality of through holes which are uniformly distributed at intervals, and the outer wall of the flow equalizing plate is fixedly connected with the inner wall of the large-diameter end of the circular truncated cone-shaped spray pipe.
The invention also provides a denitration ammonia injection system, which comprises the ammonia injection uniform distribution device, and the denitration ammonia injection system also comprises: the ammonia spraying and uniformly distributing device is fixed in the flue gas pipeline and is vertical to the flow direction of the flue gas, and the spraying direction of a nozzle of the ammonia spraying and uniformly distributing device is opposite to the flow direction of the flue gas; the denitration reactor is arranged in the flue gas pipeline and is positioned at the downstream position of the ammonia spraying uniform distribution device; the flame burner is arranged in the flue gas pipeline and positioned between the ammonia spraying and uniformly distributing device and the denitration reactor; and the measurement and analysis assembly is arranged in the flue gas pipeline and is used for measuring and analyzing the gas components and the speed in the flue gas pipeline.
Furthermore, the flue gas pipeline comprises a flue gas inlet pipe and a flue gas outlet pipe which are arranged in parallel at intervals, the outlet of the flue gas inlet pipe is connected with the inlet of the flue gas outlet pipe through a connecting pipeline, the ammonia spraying and uniformly distributing device is arranged in the flue gas inlet pipe, and the denitration reactor is arranged in the flue gas outlet pipe; the denitration ammonia injection system also comprises a heat exchanger which is respectively connected with the flue gas inlet pipe and the flue gas outlet pipe.
Further, the measurement analysis component includes: the speed measuring instrument and the flue gas analyzer are arranged in the flue gas inlet pipe and are positioned between the heat exchanger and the ammonia spraying uniform distribution device; and the ammonia gas analyzer is arranged in the flue gas outlet pipe and is positioned between the denitration reactor and the heat exchanger.
The invention has the advantages that the uniform distribution of ammonia spraying amount of each nozzle in each independent subarea can be realized by adopting the arrangement mode of the I-shaped branch pipes and the X-shaped distributor, the uniform distribution of the speed and the pressure of ammonia gas of each nozzle is realized, the uniform mixing of flue gas and ammonia gas is realized, and the phenomenon of ammonia escape caused by overlarge local ammonia gas concentration is eliminated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a first embodiment of an ammonia injection equispaced device of the present invention;
FIG. 2 is a schematic structural view of a second embodiment of the ammonia injection equispaced device of the present invention;
FIG. 3 is a schematic structural view of a third embodiment of the ammonia injection equispaced device of the present invention;
FIG. 4 is a schematic diagram of an X-shaped distributor and nozzle configuration in accordance with an embodiment of the present invention;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a schematic structural view of a nozzle in an embodiment of the present invention;
FIG. 7 is a side view of FIG. 6;
FIG. 8 is a schematic structural diagram of a denitration ammonia injection system according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a speed meter;
FIG. 10 is a schematic diagram of a flue gas analyzer;
fig. 11 is a schematic structural view of an ammonia gas analyzer.
Reference numbers in the figures: 10. an ammonia spraying main pipe; 101. a first main tube; 102. a second main pipe; 103. a third main pipe; 11. an ammonia injection branch pipe; 12. an I-shaped branch pipe; 121. a first-stage I-shaped branch pipe; 122. a second-stage I-shaped branch pipe; 13. an X-shaped distributor; 14. a nozzle; 141. a truncated cone-shaped nozzle; 142. an arc-shaped guide plate; 143. a circumferential seam support; 144. a flow equalizing plate; 15. a first regulating valve; 16. a flow meter; 17. a second regulating valve; 20. a flue gas duct; 21. a flue gas inlet pipe; 22. a flue gas outlet pipe; 23. connecting a pipeline; 24. a spoiler; 25. a baffle; 26. a rectifying grid; 30. a denitration reactor; 40. a heat exchanger; 50. a flame burner; 61. a speed measuring instrument; 62. a flue gas analyzer; 63. an ammonia gas analyzer.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 7, an embodiment of the present invention provides an ammonia spraying uniform distribution device, which includes an ammonia spraying main pipe 10 and a plurality of ammonia spraying units that have the same structure and are uniformly distributed at intervals, wherein each ammonia spraying unit includes an ammonia spraying branch pipe 11, an i-shaped branch pipe 12, a plurality of X-shaped distributors 13, and a plurality of nozzles 14. The inlet of the ammonia injection branch pipe 11 is connected with the ammonia injection main pipe 10. The I-shaped branch pipe 12 is provided with a first inlet and a plurality of first outlets, the first inlet is positioned at the symmetrical center of the I-shaped branch pipe 12, the plurality of first outlets are in one-to-one correspondence with the end part of the I-shaped branch pipe 12, and the outlets of the ammonia spraying branch pipes 11 are connected with the first inlets. The X-shaped distributors 13 are connected with the first outlets in a one-to-one correspondence mode, each X-shaped distributor 13 comprises a second inlet and a plurality of second outlets, the second inlets are located at the symmetrical centers of the X-shaped distributors 13, the second outlets are in one-to-one correspondence with the end portions of the X-shaped distributors 13, and the second inlets of the X-shaped distributors 13 are communicated with the corresponding first outlets. Each second outlet is correspondingly connected with a nozzle 14.
By adopting the arrangement mode of the I-shaped branch pipes 12 and the X-shaped distributor 13, the ammonia spraying amount of each nozzle 14 in each independent subarea can be uniformly distributed, the ammonia gas speed and pressure of each nozzle 14 can be uniformly distributed, the flue gas and the ammonia gas can be uniformly mixed, and the phenomenon of ammonia escape caused by overlarge local ammonia gas concentration can be eliminated.
As shown in fig. 1, the ammonia injection main pipe 10 includes a first main pipe 101, a second main pipe 102, and a third main pipe 103 connected in this order, wherein the first main pipe 101 has an inner diameter larger than that of the second main pipe 102, and the second main pipe 102 has an inner diameter larger than that of the third main pipe 103. The section 10 of the ammonia spraying main pipe is connected by adopting a plurality of sections of pipelines with different pipe diameters so as to realize the uniform and stable flow rate of ammonia gas.
Preferably, the inlet end of the first main pipe 101 is provided with a second regulating valve 17 for controlling the opening degree of the ammonia spraying main pipe 10. The ammonia injection branch pipe 11 of each ammonia injection unit is provided with a first regulating valve 15 and a flow meter 16. Every spouts and all is provided with first governing valve 15 and flowmeter 16 on the ammonia branch pipe 11, can adjust and control every subregion respectively through first governing valve 15 and flowmeter 16 and spout the ammonia volume for it is adjustable to spout the ammonia volume subregion on the flue cross-section, optimizes ammonia and nitrogen oxide's in the air homogeneous mixing effect, has improved denitration efficiency, and has effectively reduced the ammonia escape rate.
It should be noted that, in the embodiment of the present invention, the ammonia injection main pipe 10 is disposed outside the whole apparatus, at least two ammonia injection main pipes 10 are disposed, and the two ammonia injection main pipes 10 are designed in a symmetrical structure.
Further, the ammonia spraying and uniformly distributing device also comprises a control assembly which is connected with the first regulating valve 15 and the second regulating valve 17. The first regulating valve 15 and the second regulating valve 17 in the embodiment of the invention are both opening regulating valves, and comprise actuators and electromagnetic flow regulating valve bodies, and the actuators are used for receiving opening signals from the control assembly and regulating the opening of the electromagnetic flow regulating valve bodies, so that the automatic regulation of ammonia spraying amount is realized.
As shown in fig. 5 to 7, the nozzle 14 includes a truncated cone-shaped nozzle 141, an arc-shaped flow guide plate 142, a circumferential seam support 143, and a flow equalizing plate 144. The circular truncated cone-shaped nozzle 141 has a large-diameter end and a small-diameter end. The small diameter end of the first outlet is connected with the second outlet. The arc-shaped guide plate 142 is fixedly connected with the large-diameter end of the circular truncated cone-shaped spray pipe 141 through the circular seam supporting piece 143. The flow equalizing plate 144 has a plurality of through holes uniformly distributed at intervals, and the outer wall of the flow equalizing plate 144 is fixedly connected with the inner wall of the large-diameter end of the circular truncated cone-shaped spray pipe 141. The flow equalization plate 144 may be a porous honeycomb structure to achieve uniform distribution of the air flow. It should be noted that the arrow direction in the figure is the smoke flowing direction.
As shown in fig. 6, a plurality of circular seam supports 143 are uniformly distributed along the circumferential direction of the circular truncated cone-shaped nozzle 141, the circular seam supports 143 are located in the circular truncated cone-shaped nozzle 141, and the circular seam supports 143 are located between the arc-shaped flow guide plate 142 and the flow equalizing plate 144. The circular seam support 143 comprises a top edge, a bottom edge and an inner side edge, the top edge is connected with the arc-shaped flow guide plate 142, the bottom edge is connected with the large-diameter end of the circular truncated cone-shaped spray pipe 141, the inner side edge is parallel to the central line of the circular truncated cone-shaped spray pipe 141, the distance from the side edge to the central line of the circular truncated cone-shaped spray pipe 141 is smaller than the radius of the flow balance plate 144, the flow balance plate 144 is fixed by the circular seam support 143, and meanwhile, the circular seam support 143 and the arc-shaped flow guide plate 142 can be separated from and assembled with the circular truncated cone-.
As shown in fig. 2, the present invention is not limited to the above embodiment, in the second embodiment, a plurality of independently controlled partitions are set in the flue, each partition has a plurality of ammonia injection units with the same structure and evenly distributed at intervals, wherein, part of the ammonia injection branch pipes 11 of the partitions are connected with the i-shaped branch pipes 12 in a T-shaped connection manner, and the other partitions are connected with the i-shaped branch pipes 12 in a Z-shaped connection manner; one end of the ammonia spraying branch pipe 11 is connected with the central position of the length direction of the middle pipe section of the I-shaped branch pipe 12. The outlet end of the I-shaped branch pipe 12 is connected with the central inlet end of an X-shaped distributor 13, 4 nozzles 14 are arranged at the four tail ends of the X-shaped distributor 13, and the spraying direction of the nozzles 14 is opposite to the flowing direction of the flue gas.
As shown in fig. 3, in the third embodiment, a plurality of independently controlled partitions are set in the flue, each partition has a plurality of ammonia injection units with the same structure and uniformly distributed at intervals, wherein, the ammonia injection branch pipes 11 of some partitions are connected with the first-level i-shaped branch pipe 121 by adopting a T-shaped connection mode, and other partitions are connected with the first-level i-shaped branch pipe 121 by adopting a Z-shaped ammonia injection branch pipe 11; four outlet ends of the first-stage I-shaped branch pipe 121 are connected with the center position of the middle pipe section of the second-stage I-shaped branch pipe 122 in the length direction. Four outlet ends of the second-stage I-shaped branch pipe 122 are connected with the central inlet end of the X-shaped distributor 13, 4 nozzles 14 are arranged at the four tail ends of the X-shaped distributor 13, and the spraying directions of the nozzles 14 are opposite to the flowing direction of the flue gas.
As shown in fig. 8 to 11, an embodiment of the present invention further provides a denitration ammonia injection system, which includes the ammonia injection uniform distribution device, and the denitration ammonia injection system further includes a flue gas pipeline 20, a denitration reactor 30, a flame burner 50, and a measurement and analysis component. The ammonia spraying and uniformly distributing device is fixed in the flue gas pipeline 20 and is vertical to the flow direction of the flue gas, and the spraying direction of the nozzles of the ammonia spraying and uniformly distributing device is opposite to the flow direction of the flue gas. The denitration reactor 30 is arranged in the flue gas pipeline 20 and is positioned at the downstream position of the ammonia spraying uniform distribution device. The flame burner 50 is arranged in the flue gas pipeline 20 and is positioned between the ammonia injection uniform distribution device and the denitration reactor 30; the measurement and analysis assembly is disposed within the flue gas duct 20 and is used to measure and analyze the gas composition and velocity in the flue gas duct 20.
Specifically, the flue gas duct 20 comprises a flue gas inlet pipe 21 and a flue gas outlet pipe 22 which are arranged in parallel at intervals, an outlet of the flue gas inlet pipe 21 is connected with an inlet of the flue gas outlet pipe 22 through a connecting pipeline 23, the ammonia spraying and uniformly distributing device is arranged in the flue gas inlet pipe 21, and the denitration reactor 30 is arranged in the flue gas outlet pipe 22; the denitration ammonia injection system further comprises a heat exchanger 40 which is respectively connected with the flue gas inlet pipe 21 and the flue gas outlet pipe 22.
The original flue gas (unpurified) enters the embodiment from a flue gas inlet pipe 21, firstly, the flue gas is preheated and heated by a heat exchanger 40, the heated flue gas flows through a measurement and analysis assembly, then passes through an ammonia spraying and uniform distribution device, the ammonia spraying operation is carried out by the ammonia spraying and uniform distribution device, the sprayed ammonia gas is mixed with the flue gas, the flue gas continuously rises, the flue gas is mixed in a streaming way by a spoiler 24 to promote the further mixing of the ammonia gas and the flue gas, the high-efficiency combustion of combustible gas and combustion-supporting air is carried out in a flame burner 50, the temperature of the mixed gas of the flue gas and the ammonia gas is further improved, the flue gas is guided by a connecting pipeline 23 and a guide plate 25 arranged in the connecting pipeline, the further mixing of the flue gas and the ammonia gas is realized, the energy is simultaneously mixed, the uniformity of the temperature of the flue gas and the rectification effect of the, Inside the vertical catalyst converter that gets into SCR denitration reactor 30 (this embodiment is SCR denitration reactor), realize nitrogen oxide and ammonia high-efficient quick even reaction under the catalyst catalytic effect in the flue gas, flue gas mixture after the catalyst flows through the measurement and analysis subassembly after, the ammonia content in the measurement and analysis subassembly detection gas mixture, control ammonia concentration is less than the setting value, if ammonia content exceeds the setting value, feed back to control system, reset the ammonia injection volume that spouts ammonia equipartition device, adjust the ammonia injection volume of first governing valve 15 and second governing valve 17 through the controller simultaneously, it satisfies the setting value to continuously monitor SCR denitration reactor 30 low reaches surplus ammonia content, the gas mixture flows through flue gas outlet pipe 22 and gets into the low reaches dust remover after getting into heat exchanger 40.
It should be noted that, in this embodiment, at least two flame burners 50 are disposed at the downstream of the ammonia injection uniform distribution device, and the flame burners 50 are used to burn combustible gas and combustion-supporting gas, so as to realize temperature rise of flue gas and ammonia gas, meet the requirement of flue gas temperature required by SCR reaction, and realize the expected denitration reaction.
Specifically, the measurement and analysis component includes: a speed meter 61, a flue gas analyzer 62, and an ammonia gas analyzer 63. The speed measuring instrument 61 and the flue gas analyzer 62 are arranged in the flue gas inlet pipe 21 and are positioned between the heat exchanger 40 and the ammonia spraying and uniformly distributing device; the ammonia gas analyzer 63 is disposed in the flue gas outlet pipe 22 between the denitration reactor 30 and the heat exchanger 40.
As shown in fig. 9, the speed measuring instrument 61 is distributed on the flue section as a plurality of independent distribution areas, a plurality of groups of relatively independent tube bundles are arranged in the distribution areas, each tube bundle can be provided with different numbers of sampling tubes, the top end of each sampling tube is provided with a speed detecting element, the position of the speed detecting element and the center of the X-shaped distributor 13 in the ammonia spraying distribution device are on the same axis, the sampling tube bundles are symmetrically arranged on both sides of the flue section, and the flue gas flow rate of each flue gas speed measuring point represents the flue gas speed distribution at different positions.
Combining the concentration of nitrogen oxides at each measuring point of the smoke components and the flow rate of the smoke, calculating the removal load of the nitrogen oxides in each X-shaped distributor 13 area according to the area covered by each X-shaped distributor 13, calculating the ammonia injection amount required in each X-shaped distributor 13 area, calculating the total ammonia injection amount in the distribution area according to the number of the X-shaped distributors 13 in each distribution area, wherein the calculated ammonia injection amount is the ammonia injection amount required to be set by the ammonia injection branch pipe 11 in the area, adjusting the opening adjusting valve by using the controller to realize the accurate setting and control of the ammonia injection amount, simultaneously monitoring the actual ammonia injection amount of the ammonia injection branch pipe 11 in the area by using the flow meter 16, if the deviation between the monitored ammonia injection amount and the set value is smaller than the allowable deviation range, keeping the opening adjusting valve to set, stabilizing the ammonia injection amount, and if the deviation between the monitored ammonia injection amount and the set value is larger than the allowable deviation range, continuing to adjust the, until the deviation between the monitored ammonia injection amount and the set value is less than the allowable deviation range.
As shown in fig. 10, the flue gas analyzer 62 is distributed on the flue cross section as a plurality of independent distribution areas, a plurality of groups of relatively independent sampling tube bundles are arranged in the distribution areas, each sampling tube bundle can be provided with different numbers of sampling tubes, the top end of each sampling tube is provided with a flue gas component sampler, the positions of the flue gas samplers and the centers of the X-shaped distributors 13 in the ammonia spraying and distributing device are on the same axis, the sampling tube bundles are symmetrically arranged on the two sides of the flue cross section, and the flue gas components measured by each flue gas component sampling point represent the concentration distribution of nitrogen oxides in the flue gas at different positions.
As shown in fig. 11, the ammonia analyzer 63 is distributed on the flue section as a plurality of independent distribution areas, a plurality of groups of relatively independent sampling tube bundles are arranged in the distribution areas, each sampling tube bundle can be provided with sampling tubes of different numbers, the top end of each sampling tube is provided with an ammonia component sampler, the sampling tube bundles are symmetrically arranged on the two sides of the flue section, and the ammonia component measured by each ammonia component sampling point represents the concentration distribution of ammonia in the flue gas at different positions. In this embodiment, the ammonia gas analyzer 63 is provided with a plurality of ammonia gas sampling and measuring points, and the ammonia gas sampling and measuring points are arranged in one-to-one correspondence with the positions of the X-shaped distributors 13 in the ammonia spraying and uniform distribution device.
The distribution mode of the ammonia gas concentration distribution area is consistent with the distribution position of the flue gas analyzer and the distribution mode of the ammonia spraying and uniformly distributing device, the one-to-one correspondence relationship between the distribution area of the ammonia gas analyzer and each area of the ammonia spraying and uniformly distributing device is determined by combining the analysis result of finite element fluid simulation software, whether the ammonia spraying amount in the corresponding distribution area in the corresponding ammonia spraying and uniformly distributing device is proper or not is evaluated by using the ammonia gas concentration measured in each area, if the ammonia gas concentration of a monitored certain subarea exceeds an allowable value, the ammonia spraying amount in the corresponding ammonia spraying distribution area is indicated to be too large, the corresponding calculation model reduces the ammonia spraying amount, and the ammonia spraying amount is adjusted by automatically adjusting an opening adjusting valve until the monitored ammonia gas concentration value reaches the allowable emission requirement; if the ammonia concentration in a certain distribution area is too low, the ammonia spraying amount in the ammonia spraying distribution area corresponding to the certain distribution area is insufficient, the corresponding calculation model is increased aiming at the ammonia spraying amount, the ammonia spraying amount is adjusted by automatically adjusting the opening adjusting valve until the monitored ammonia concentration value reaches the minimum ammonia excess concentration, and sufficient ammonia and nitrogen oxides are ensured to be completely reacted.
By utilizing the speed measuring instrument 61, the flue gas analyzer 62 and the ammonia gas analyzer 63, the automatic setting, automatic adjustment and automatic detection of the ammonia spraying amount in each area are realized, the dynamic control of the ammonia spraying amount is realized, the requirement of adjusting the ammonia spraying amount in real time under different flue gas working conditions is met, the residual ammonia amount in the flue gas is monitored, and the excessive ammonia escape amount in the discharged flue gas is avoided.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. divide into a plurality of regions that the area is the same with the flue cross-section, every region all is provided with spouts ammonia branch pipe, I-shaped branch pipe, X shape distributor and nozzle, is provided with adjusting valve and flowmeter on every spouts ammonia branch pipe, can adjust and control the ammonia injection volume of every subregion respectively through adjusting valve and flowmeter for it is adjustable to spout ammonia volume subregion on the flue cross-section, optimizes ammonia and the homogeneous mixing effect of nitrogen oxide in the air, has improved denitration efficiency, and has effectively reduced the ammonia escape rate.
2. The connection mode of the I-shaped branch pipes, the X-shaped distributors and the nozzles is adopted in each subarea, so that the on-way resistance loss of all the nozzles is equal, the flow and the pressure of each nozzle in each subarea are equal, the difference among the nozzles is eliminated, the ammonia spraying amount in the subareas is uniformly distributed, and the large flow nonuniformity among the traditional ammonia spraying grid nozzles is eliminated.
3. The X-shaped distributor is arranged, and the nozzles are arranged at the tail ends of the X-shaped distributor, so that the equal nozzle spacing can be realized in the transverse direction and the longitudinal direction of all the nozzles in each subarea, the uniform distribution of the nozzles is realized, the equal coverage area of each nozzle is realized, and the uniform distribution of the ammonia amount sprayed by each nozzle in the space is realized.
4. The distribution of the flue gas in the flue is not uniform, the flue gas flow in a local area is large, the load capacity of the nitrogen oxides can be calculated according to the flow of the flue gas by aiming at an ammonia spraying subarea corresponding to the area with large local flue gas flow, the required ammonia spraying capacity can be calculated according to the load capacity of the nitrogen oxides in the subarea, the ammonia spraying capacity of the subarea can be adjusted and monitored according to the required ammonia spraying capacity, the appropriate ammonia spraying capacity of the subarea can be realized, the ideal removal of the nitrogen oxides can be realized, the surplus of the ammonia spraying capacity can be avoided, and the ammonia escape can be eliminated.
5. Reform transform on original deNOx systems basis, save the investment, when reduce cost, guarantee higher denitration efficiency.
6. The denitration ammonia-spraying uniform distribution device is simple in structure and convenient to adjust, ammonia gas and flue gas are mixed more uniformly, and the removal efficiency of nitrogen oxides is improved.
7. The processing, the manufacturing and the installation are simple and convenient, and the implementation is easy.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features, the technical schemes and the technical schemes can be freely combined and used.

Claims (10)

1.一种喷氨均布装置,其特征在于,包括喷氨主管(10)和多个结构相同且间隔均布的喷氨单元,每个所述喷氨单元均包括:1. an ammonia spray uniform device, is characterized in that, comprises ammonia spray main pipe (10) and a plurality of ammonia spray units identical in structure and evenly spaced, and each described ammonia spray unit comprises: 喷氨支管(11),喷氨支管(11)的入口与喷氨主管(10)连接;The ammonia injection branch pipe (11), the inlet of the ammonia injection branch pipe (11) is connected with the ammonia injection main pipe (10); 工字形支管(12),具有第一入口和多个第一出口,所述第一入口位于工字形支管(12)的对称中心处,多个所述第一出口与工字形支管(12)的端部一一对应,喷氨支管(11)的出口与所述第一入口连接;The I-shaped branch pipe (12) has a first inlet and a plurality of first outlets, the first inlet is located at the symmetrical center of the I-shaped branch pipe (12), and the plurality of first outlets and the I-shaped branch pipe (12) The ends are in one-to-one correspondence, and the outlet of the ammonia injection branch pipe (11) is connected to the first inlet; 多个X形分布器(13),与多个所述第一出口一一对应连接,每个X形分布器(13)均包括第二入口和多个第二出口,所述第二入口位于X形分布器(13)的对称中心处,所述第二出口与X形分布器(13)的端部一一对应,每个X形分布器(13)的所述第二入口均与对应的所述第一出口连通;A plurality of X-shaped distributors (13) are connected with the plurality of first outlets in one-to-one correspondence, each X-shaped distributor (13) includes a second inlet and a plurality of second outlets, the second inlets are located at At the symmetrical center of the X-shaped distributor (13), the second outlet corresponds to the end of the X-shaped distributor (13) one-to-one, and the second inlet of each X-shaped distributor (13) corresponds to The said first outlet is connected; 多个喷嘴(14),每个所述第二出口处均对应连接有一个喷嘴(14)。A plurality of nozzles (14), each of the second outlets is connected with a nozzle (14) correspondingly. 2.根据权利要求1所述的喷氨均布装置,其特征在于,每个所述喷氨单元的喷氨支管(11)上均设置有第一调节阀(15)和流量计(16)。2. The ammonia injection uniform distribution device according to claim 1, wherein the ammonia injection branch pipe (11) of each ammonia injection unit is provided with a first regulating valve (15) and a flow meter (16) . 3.根据权利要求2所述的喷氨均布装置,其特征在于,喷氨主管(10)包括依次连接的第一主管(101)、第二主管(102)和第三主管(103),第一主管(101)的内径大于第二主管(102)的内径,第二主管(102)的内径大于第三主管(103)的内径。3. The ammonia injection uniform distribution device according to claim 2, wherein the ammonia injection main pipe (10) comprises a first main pipe (101), a second main pipe (102) and a third main pipe (103) connected in sequence, The inner diameter of the first main pipe (101) is larger than the inner diameter of the second main pipe (102), and the inner diameter of the second main pipe (102) is larger than the inner diameter of the third main pipe (103). 4.根据权利要求3所述的喷氨均布装置,其特征在于,第一主管(101)的入口端设置有用于控制喷氨主管(10)开度的第二调节阀(17)。4. The ammonia injection uniform distribution device according to claim 3, characterized in that, the inlet end of the first main pipe (101) is provided with a second regulating valve (17) for controlling the opening of the ammonia injection main pipe (10). 5.根据权利要求4所述的喷氨均布装置,其特征在于,所述喷氨均布装置还包括控制组件,与第一调节阀(15)和第二调节阀(17)连接。5 . The uniform distribution device for ammonia injection according to claim 4 , wherein the uniform distribution device for ammonia injection further comprises a control assembly, which is connected to the first regulating valve ( 15 ) and the second regulating valve ( 17 ). 6 . 6.根据权利要求1所述的喷氨均布装置,其特征在于,喷嘴(14)包括:6. The ammonia spray uniform distribution device according to claim 1, wherein the nozzle (14) comprises: 圆台状喷管(141),小径端与所述第二出口连接;a circular truncated nozzle (141), the small diameter end is connected to the second outlet; 弧形导流板(142),通过环缝支撑件(143)与圆台状喷管(141)的大径端固定连接。The arc-shaped deflector (142) is fixedly connected with the large diameter end of the circular frustum-shaped nozzle (141) through the annular slot support (143). 7.根据权利要求6所述的喷氨均布装置,其特征在于,喷嘴(14)还包括均流板(144),具有多个间隔均布的贯通孔,均流板(144)的外壁与圆台状喷管(141)的大径端的内壁固定连接。7 . The ammonia spray uniform distribution device according to claim 6 , wherein the nozzle ( 14 ) further comprises a flow equalizing plate ( 144 ) having a plurality of through holes evenly spaced, and the outer wall of the equalizing plate ( 144 ) has It is fixedly connected with the inner wall of the large diameter end of the circular frustum-shaped nozzle (141). 8.一种脱硝喷氨系统,包括权利要求1至7中任一项所述的喷氨均布装置,其特征在于,所述脱硝喷氨系统还包括:8. A denitrification ammonia spray system, comprising the ammonia spray uniform distribution device according to any one of claims 1 to 7, wherein the denitration ammonia spray system further comprises: 烟气管道(20),所述喷氨均布装置固定在烟气管道(20)内并垂直于烟气流动方向,所述喷氨均布装置的喷嘴喷射方向与所述烟气流动方向相向;A flue gas duct (20), the ammonia injection uniform distribution device is fixed in the flue gas duct (20) and is perpendicular to the flue gas flow direction, and the injection direction of the nozzle of the ammonia injection uniform distribution device is opposite to the flue gas flow direction ; 脱硝反应器(30),设置在烟气管道(20)中并位于所述喷氨均布装置的下游位置;a denitration reactor (30), which is arranged in the flue gas pipeline (20) and is located at the downstream position of the ammonia injection uniform distribution device; 火焰燃烧器(50),设置在烟气管道(20)并位于所述喷氨均布装置和脱硝反应器(30)之间;a flame burner (50), arranged in the flue gas pipeline (20) and between the ammonia injection uniform distribution device and the denitration reactor (30); 测量分析组件,设置在烟气管道(20)内并用于测量分析烟气管道(20)中气体成分和速度。The measurement and analysis component is arranged in the flue gas duct (20) and used for measuring and analyzing the gas composition and velocity in the flue gas duct (20). 9.根据权利要求8所述的脱硝喷氨系统,其特征在于,9. The denitrification ammonia spray system according to claim 8, characterized in that, 烟气管道(20)包括平行间隔设置的烟气入口管(21)和烟气出口管(22),烟气入口管(21)的出口与烟气出口管(22)的入口通过连接管路(23)连接,喷氨均布装置设置在烟气入口管(21)内,脱硝反应器(30)设置在烟气出口管(22)内;The flue gas duct (20) comprises a flue gas inlet pipe (21) and a flue gas outlet pipe (22) arranged in parallel and spaced apart, and the outlet of the flue gas inlet pipe (21) and the inlet of the flue gas outlet pipe (22) pass through a connecting pipeline (23) connection, the ammonia spray uniform distribution device is arranged in the flue gas inlet pipe (21), and the denitration reactor (30) is arranged in the flue gas outlet pipe (22); 所述脱硝喷氨系统还包括换热器(40),分别连接烟气入口管(21)和烟气出口管(22)。The denitration ammonia injection system further comprises a heat exchanger (40), which is respectively connected to the flue gas inlet pipe (21) and the flue gas outlet pipe (22). 10.根据权利要求9所述的脱硝喷氨系统,其特征在于,所述测量分析组件包括:10. The denitration ammonia injection system according to claim 9, wherein the measurement and analysis component comprises: 速度测量仪(61)和烟气分析仪(62),设置在烟气入口管(21)内并位于换热器(40)与所述喷氨均布装置之间;a velocity measuring instrument (61) and a flue gas analyzer (62), arranged in the flue gas inlet pipe (21) and between the heat exchanger (40) and the ammonia injection uniform distribution device; 氨气分析仪(63),设置在烟气出口管(22)内并位于脱硝反应器(30)与换热器(40)之间。An ammonia gas analyzer (63) is arranged in the flue gas outlet pipe (22) and is located between the denitration reactor (30) and the heat exchanger (40).
CN202011463158.4A 2020-12-14 2020-12-14 Ammonia spraying uniform distribution device and denitration ammonia spraying system Active CN112657333B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011463158.4A CN112657333B (en) 2020-12-14 2020-12-14 Ammonia spraying uniform distribution device and denitration ammonia spraying system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011463158.4A CN112657333B (en) 2020-12-14 2020-12-14 Ammonia spraying uniform distribution device and denitration ammonia spraying system

Publications (2)

Publication Number Publication Date
CN112657333A true CN112657333A (en) 2021-04-16
CN112657333B CN112657333B (en) 2024-04-16

Family

ID=75405446

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011463158.4A Active CN112657333B (en) 2020-12-14 2020-12-14 Ammonia spraying uniform distribution device and denitration ammonia spraying system

Country Status (1)

Country Link
CN (1) CN112657333B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113074382A (en) * 2021-04-30 2021-07-06 中冶京诚工程技术有限公司 Direct-fired heating device for denitration system
CN113154429A (en) * 2021-04-30 2021-07-23 中冶京诚工程技术有限公司 Denitration system for combustion temperature rise in flue
CN113144898A (en) * 2021-04-30 2021-07-23 中冶京诚工程技术有限公司 Flue denitration ammonia injection uniform distribution device and denitration ammonia injection system
CN113204872A (en) * 2021-04-29 2021-08-03 上海明华电力科技有限公司 Uneven ammonia spraying partition nozzle resistance design method based on numerical simulation
CN113559705A (en) * 2021-08-05 2021-10-29 西安热工研究院有限公司 Drainage type SCR denitration urea direct injection system
CN114699889A (en) * 2022-04-19 2022-07-05 东方电气集团东方锅炉股份有限公司 SCR denitration system capable of accurately controlling ammonia injection amount
CN114950133A (en) * 2022-05-18 2022-08-30 西安西热锅炉环保工程有限公司 A kind of ammonia injection grill for graded control of near-zero nitrogen oxide emissions
CN115121118A (en) * 2022-07-27 2022-09-30 西安热工研究院有限公司 SCR denitration ammonia injection system and SCR denitration ammonia injection control method
CN115487656A (en) * 2022-11-15 2022-12-20 张家港市锦明机械有限公司 Glass production flue gas desulfurization system
CN115703024A (en) * 2021-08-05 2023-02-17 中国石化工程建设有限公司 Liquid material distribution and collection device for adsorption tower
CN117298861A (en) * 2023-11-30 2023-12-29 中建材环保研究院(江苏)有限公司 High-temperature high-dust SCR denitration system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489129A (en) * 2011-12-14 2012-06-13 山东中玻节能环保发展有限公司 Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof
JP2013176733A (en) * 2012-02-28 2013-09-09 Mitsubishi Heavy Ind Ltd Denitration device and reducing agent distribution adjusting method of denitration device
CN205965517U (en) * 2016-07-28 2017-02-22 中国大唐集团科学技术研究院有限公司华中分公司 Spout ammonia pipe and use this ammonia injection grid device and SCR system of spouting ammonia pipe
CN106731812A (en) * 2017-01-17 2017-05-31 国网河南省电力公司电力科学研究院 A kind of flue gas subregion mixing denitrating system
CN208356498U (en) * 2018-05-15 2019-01-11 中冶京诚工程技术有限公司 Flue gas desulfurization and denitrification integrated device
CN214051166U (en) * 2020-12-14 2021-08-27 中冶京诚工程技术有限公司 Ammonia spray uniform distribution device and denitrification ammonia spray system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489129A (en) * 2011-12-14 2012-06-13 山东中玻节能环保发展有限公司 Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof
JP2013176733A (en) * 2012-02-28 2013-09-09 Mitsubishi Heavy Ind Ltd Denitration device and reducing agent distribution adjusting method of denitration device
CN205965517U (en) * 2016-07-28 2017-02-22 中国大唐集团科学技术研究院有限公司华中分公司 Spout ammonia pipe and use this ammonia injection grid device and SCR system of spouting ammonia pipe
CN106731812A (en) * 2017-01-17 2017-05-31 国网河南省电力公司电力科学研究院 A kind of flue gas subregion mixing denitrating system
CN208356498U (en) * 2018-05-15 2019-01-11 中冶京诚工程技术有限公司 Flue gas desulfurization and denitrification integrated device
CN214051166U (en) * 2020-12-14 2021-08-27 中冶京诚工程技术有限公司 Ammonia spray uniform distribution device and denitrification ammonia spray system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113204872A (en) * 2021-04-29 2021-08-03 上海明华电力科技有限公司 Uneven ammonia spraying partition nozzle resistance design method based on numerical simulation
CN113074382A (en) * 2021-04-30 2021-07-06 中冶京诚工程技术有限公司 Direct-fired heating device for denitration system
CN113154429A (en) * 2021-04-30 2021-07-23 中冶京诚工程技术有限公司 Denitration system for combustion temperature rise in flue
CN113144898A (en) * 2021-04-30 2021-07-23 中冶京诚工程技术有限公司 Flue denitration ammonia injection uniform distribution device and denitration ammonia injection system
CN113154429B (en) * 2021-04-30 2025-03-18 中冶京诚工程技术有限公司 Denitrification system with combustion and heating in the flue
CN113144898B (en) * 2021-04-30 2025-01-24 中冶京诚工程技术有限公司 Flue denitrification ammonia spraying uniform distribution device and denitrification ammonia spraying system
CN115703024A (en) * 2021-08-05 2023-02-17 中国石化工程建设有限公司 Liquid material distribution and collection device for adsorption tower
CN113559705A (en) * 2021-08-05 2021-10-29 西安热工研究院有限公司 Drainage type SCR denitration urea direct injection system
CN114699889A (en) * 2022-04-19 2022-07-05 东方电气集团东方锅炉股份有限公司 SCR denitration system capable of accurately controlling ammonia injection amount
CN114950133A (en) * 2022-05-18 2022-08-30 西安西热锅炉环保工程有限公司 A kind of ammonia injection grill for graded control of near-zero nitrogen oxide emissions
CN115121118A (en) * 2022-07-27 2022-09-30 西安热工研究院有限公司 SCR denitration ammonia injection system and SCR denitration ammonia injection control method
CN115487656A (en) * 2022-11-15 2022-12-20 张家港市锦明机械有限公司 Glass production flue gas desulfurization system
CN117298861A (en) * 2023-11-30 2023-12-29 中建材环保研究院(江苏)有限公司 High-temperature high-dust SCR denitration system

Also Published As

Publication number Publication date
CN112657333B (en) 2024-04-16

Similar Documents

Publication Publication Date Title
CN112657333A (en) Ammonia spraying and uniformly distributing device and denitration ammonia spraying system
CN214051166U (en) Ammonia spray uniform distribution device and denitrification ammonia spray system
CN108404661A (en) The full load of a kind of leveling of on-line velocity field and concentration field measurement precisely sprays ammonia system
US6905658B2 (en) Channelized SCR inlet for improved ammonia injection and efficient NOx control
CN105126616A (en) SCR denitration system ammonia spraying optimization method based on weight valve regulation and control
CN104226110A (en) Coal-fired boiler SCR (Selective Catalytic Reduction) denitration control method and system
CN113144898B (en) Flue denitrification ammonia spraying uniform distribution device and denitrification ammonia spraying system
CN103877837A (en) Flue ozone distributor applied to low-temperature oxidation denitration technology and arrangement manner thereof
CN102698579B (en) Ammonia injection and eddy current mixing device and method of flue gas denitrification system
CN214051165U (en) Denitrification waste heat boiler
CN105465109B (en) A device for swirling blades and flue gas spraying ammonia for denitrification
CN102166472A (en) Spiral-flow type ammonia spraying device used for selective catalytic reduction (SCR) denitrification system
CN207913518U (en) The accurate spray ammonia system of the adaptive leveling of full load
CN106215672A (en) A kind of modified model SNCR SCR combined denitration device
CN108786460A (en) Coal-burning power plant's denitration ammonia-gas spraying device flow fieldoptimization system
CN108722184A (en) A kind of accurate spray ammonia system of the adaptive leveling of full load
CN112657334B (en) Denitration waste heat boiler
CN214635422U (en) Air preheater anti-blocking treatment device based on denitration ammonia escape control
CN214345611U (en) Optimized denitration system
CN202113779U (en) Spiral-flow type ammonia spraying device used for SCR (Selective Catalytic Reduction) denitration system
CN214715705U (en) Flue denitration ammonia injection uniform distribution device and denitration ammonia injection system
CN106178946A (en) Method for realizing integral embedded type smelting flue gas denitration system
CN114887485B (en) A measurement and control system and method for SCR denitrification and ammonia injection in coal-fired power plants
CN217068377U (en) Tower boiler deNOx systems
CN214664545U (en) Denitration system for combustion temperature rise in flue

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant