Denitration equipment for optimizing flue gas emission

Abstract

The invention discloses denitration equipment for optimizing flue gas emission, and relates to the technical field of denitration equipment, the denitration equipment comprises a bottom guide rail, a walking mechanism, a rotating mechanism and a spraying mechanism; the walking mechanism is arranged on the bottom guide rail; the rotating mechanism and the spraying mechanism are arranged on the walking mechanism; the spraying mechanism is provided with a spraying pipe fitting which can rotate and is used for extending into the hearth; the rotating mechanism can drive the spraying pipe fitting to rotate around the axis of the spraying pipe fitting. A pipe for supplying a reducing agent and compressed air and spraying assemblies for spraying are arranged in the spraying pipe fitting, a cooling water circulation system is arranged in the spraying pipe fitting, a plurality of spraying assemblies are arranged in the spraying pipe fitting, and each spraying assembly comprises a premixing module for premixing the reducing agent and the compressed air and a spraying assembly for spraying out a premix. The spraying coverage range can be expanded, use of a reducing agent is reduced, and the use cost of the reducing agent is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of denitration equipment, and in particular to a denitration equipment for optimizing flue gas emissions. Background Art

[0002] Nitrogen oxides are one of the main atmospheric pollutants. They contribute to acid rain. NOx reacts with water and oxygen in the atmosphere to form nitric acid, which falls to the ground with precipitation, acidifying soil and water bodies and harming crops, forests, and aquatic life. It is a key component of photochemical smog. Under sunlight, NOx and volatile organic compounds undergo a complex series of photochemical reactions, producing harmful substances such as ozone and peroxyacetyl nitrate. This degrades air quality and causes serious damage to human health (such as respiratory illnesses) and ecosystems. Reducing NOx emissions helps improve regional environmental quality, reduce health risks to surrounding residents, enhance the environmental well-being of society as a whole, and promote the coordinated and sustainable development of the economy and the environment.

[0003] Existing SNCR technology for denitrification typically uses urea as the reducing agent. Urea storage is set up, and bucket elevators transport urea granules to a dissolution tank, where they are dissolved into a 40%-60% urea solution. This solution is then pumped to a dilution and metering module. Multi-layer injectors are installed at appropriate locations in the furnace (such as above the flame deflection angle or on the side walls). These injectors are made of high-temperature and corrosion-resistant materials to ensure that the reducing agent is evenly sprayed into the flue gas, which has a temperature of 850°C-1100°C, where it reacts with nitrogen oxides.

[0004] However, the traditional SNCR denitrification method adopts a set of nozzles installed on the furnace wall, and then through the external liquid and gas distribution system, conveying system and drive modules, ammonia water is sprayed into the furnace to reduce the NOx nitrogen oxides in the flue gas to achieve denitrification. Its main disadvantage is that it is restricted by installation (fixed on the four sides of the furnace wall and the position is fixed), its spray range is limited, and the reaction with the flue gas in the center of the flow field is insufficient, resulting in low denitrification efficiency of traditional SNCR denitrification technology applied to large boilers and kilns. If the required emission standards are to be met, the use of reducing agents must be increased, which increases the cost of using reducing agents. Summary of the Invention

[0005] The purpose of the present invention is to provide a denitrification device that optimizes flue gas emissions to solve the problems existing in the above-mentioned prior art, expand the spray coverage, reduce the use of reducing agents, and reduce the cost of using reducing agents.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The invention provides a denitrification device for optimizing flue gas emissions, comprising a bottom guide rail, a walking mechanism, a rotating mechanism and a spray mechanism; the bottom guide rail is used to be fixed to the ground; the walking mechanism is arranged on the bottom guide rail; the rotating mechanism and the spray mechanism are both arranged on the walking mechanism; the spray mechanism has a rotatable spray pipe, one end of the spray pipe is used to extend into the furnace; the rotating mechanism can drive the spray pipe to rotate around its own axis; the spray pipe comprises an outer sleeve arranged from the outside to the inside, a compressed air pipe, a reducing agent pipe and a plurality of cooling water inlet pipes; the reducing agent pipe is located in the compressed air pipe, and the compressed air pipe is located in the outer sleeve; the reducing agent is supplied in the reducing agent pipe; the space located outside the reducing pipe and inside the compressed air pipe is a compressed air cavity, which is supplied with compressed air; the space located outside the compressed air pipe and inside the outer sleeve is a cooling water cavity, and each of the cooling water inlet pipes is located In the cooling water chamber, one end of each cooling water inlet pipe close to the walking mechanism is used to pass cooling water, and the opening of each cooling water inlet pipe at one end away from the walking mechanism is connected to the cooling water chamber at the end position, and the end of the spray pipe close to the walking mechanism is provided with multiple cooling water return ports connected to the cooling water chamber; in the axial direction of the outer sleeve, multiple spray assemblies are fixedly arranged in sequence at intervals in the compressed air pipe; the spray assembly includes a premixing module and a spray assembly; the premixing module has at least one premixing chamber, a premixing element is provided in the premixing chamber, the reducing agent inlet of the premixing element is connected to the reducing agent pipe, and the compressed air inlet of the premixing element is connected to the compressed air chamber; the spray assembly includes at least one nozzle, and the output port of the premixing element in each premixing chamber is connected to one of the nozzles through a premixing connecting pipe; the nozzle can spray the input to the outside of the outer sleeve.

[0008] Preferably, an end sprayer is provided at one end of the outer sleeve away from the walking mechanism, the end sprayer has an end premixing chamber, the end premixing element is provided in the end premixing chamber, the reducing agent inlet of the end premixing element is connected to the reducing agent pipe, and the compressed air inlet of the end premixing element is connected to the compressed air chamber; the output port of the end premixing element is connected to an end nozzle, and the end nozzle can spray the input material to the outside of the outer sleeve.

[0009] Preferably, a rotary joint is provided at one end of the spray pipe near the walking mechanism, and the rotary joint includes a fixed shell and a rotating core shaft, and the rotating core shaft is sealed and rotatably arranged in the fixed shell; the fixed shell is used to be fixedly arranged on the walking mechanism; the fixed shell has a compressed air interface, a cooling water inlet interface, a cooling water return interface and a reducing agent interface; mutually independent compressed air annular channels, cooling water inlet annular channels, cooling water return annular channels and reducing agent annular channels are provided between the inner side wall of the fixed shell and the outer side wall of the rotating core shaft; the compressed air interface is communicated with the compressed air annular channel, the cooling water inlet interface is communicated with the cooling water inlet annular channel, the cooling water return interface is communicated with the cooling water return annular channel, the reducing agent interface is communicated with the The reducing agent annular channel is connected; one end of the rotating core shaft is used to be fixedly connected to the spray pipe; the rotating core shaft is provided with a central reducing agent channel, at least one compressed air connecting channel, at least one cooling water inlet connecting channel and at least one cooling water return connecting channel; one end of the central reducing agent channel is connected to the reducing agent annular channel, and the other end is connected to the reducing agent pipe; one end of each of the compressed air connecting channels is connected to the compressed air annular channel, and the other end is connected to the compressed air cavity; one end of each of the cooling water inlet connecting channels is connected to the cooling water inlet annular channel, and the other end is respectively connected to the corresponding cooling water inlet pipe; one end of each of the cooling water return connecting channels is connected to the cooling water return annular channel, and the other end is connected to the cooling water cavity.

[0010] Preferably, the spray assembly includes a premixing mounting seat; the reducing agent pipe includes a central input pipe and a lateral elliptical pipe, the central input pipe is coaxially arranged with the compressed air pipe, one end of the central input pipe close to the walking mechanism is the input end, which is used to introduce the reducing agent, and the other end is connected with the input end of the lateral elliptical pipe, and the lateral elliptical pipe is located on one side of the compressed air pipe; the premixing mounting seat is provided with an elliptical perforation for the lateral elliptical pipe to pass through, and the premixing mounting seat can be provided with a plurality of premixing chambers, each of which is respectively connected with the interior of the lateral elliptical pipe in the elliptical perforation; the ejection assembly also includes a nozzle mounting seat and a plurality of nozzles; each of the premixing connecting pipes is a multi-section bent pipe, and each of the nozzles is fixedly arranged on the nozzle mounting seat around the axis of the compressed air pipe.

[0011] The transmission gear of said sliding arm is connected to said sliding arm by a threaded hole, and said sliding arm is connected to said sliding arm's upper end by a threaded hole, and said sliding arm is connected to said sliding arm's lower end by a threaded hole.

[0012] Preferably, a crank connecting rod is fixedly provided on the driving gear, a connecting rod bracket is fixedly provided on the walking trolley, a connecting rod mounting hole is provided on the connecting rod bracket, and the crank connecting rod is rotatably provided in the connecting rod mounting hole through a bearing.

[0013] Preferably, an inspection port is provided on the outer sleeve at a position corresponding to each of the premixing chambers, and each of the premixing elements can be taken out from the corresponding inspection port.

[0014] Preferably, an annular furnace door seal is fixedly provided on the outer sleeve, and the furnace door seal is used to dock with the furnace door docking device. The furnace door docking device has a through hole for the spray pipe to pass through. The furnace door seal can seal and block the outside of the through hole, and the furnace door docking device has an air cooling chamber and a water cooling chamber.

[0015] Preferably, the bottom guide rail includes a central square tube and channel steels fixedly arranged on both sides of the central square tube; two front-to-rear arranged walking wheel mounting seats are fixedly provided on both sides of the walking trolley, and each walking wheel mounting seat is rotatably provided with a composite roller bearing, and the composite roller bearing is located in the groove of the corresponding channel steel.

[0016] Preferably, a detachable U-shaped clamp block is provided on each of the channel steels on both sides; the U-shaped clamp block is fixedly clamped on the upper end flange of the channel steel on the corresponding side.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The denitrification equipment for optimizing flue gas emissions provided by the present invention has a bottom guide rail fixed to the ground, and a walking mechanism that can move on the guide rail, so that the entire equipment can be moved along the length or width direction of the furnace, which is convenient for the extension and extension of the spray pipe; the rotating mechanism drives the spray pipe to rotate around its own axis, so that the spray angle changes continuously, and the coverage in the circumferential direction is achieved, so that the spraying is no longer limited to a fixed area, and can cover a larger space in the furnace; the spray pipe is extended into the furnace, and the multi-layer casing structure of multiple cooling water inlet pipes, reducing agent pipes and compressed air pipes provides a basis for uniform and stable spraying, and multiple spray assemblies are arranged at intervals in the compressed air pipe, each assembly has a nozzle, and the multiple nozzles are distributed along the axis of the outer sleeve and spray out of the outer sleeve from different positions, thereby increasing the spraying range and making the spraying more uniform and comprehensive; the premixing chamber of the premixing module has a premixing element, and in the premixing chamber, the reducing agent and the compressed air are fully mixed, so that the reducing agent is dispersed more evenly and fully, thereby improving the contact probability and reaction efficiency with nitrogen oxides in the flue gas, and reducing agent dosage can be reduced under the same denitrification effect; the rotating mechanism Working in coordination with the spray mechanism, the spray position and intensity can be precisely controlled according to the distribution of nitrogen oxide concentrations at different positions in the furnace, the spraying amount can be reduced in areas with low nitrogen oxide concentrations and increased in areas with high concentrations, thereby avoiding blind and excessive spraying of reducing agents, achieving precise denitrification, and reducing unnecessary reducing agent consumption. Through the above-mentioned measures to reduce the use of reducing agents, the actual consumption of reducing agents is directly reduced, the compressed air and reducing agent are fully mixed in the premixing module, and the precise spraying control improves the utilization rate of reducing agents, reduces the total amount of reducing agents required for the same denitrification effect, and significantly reduces costs during long-term operation. Since the spray pipes are equipped with a water cooling system and a coordinated walking mechanism, open flame operations can be carried out under the combustion state in the furnace, and can be applied to environments of different temperatures. Compared with traditional denitrification equipment, the spray pipes can directly reach the core area of ​​combustion in the furnace, directly react chemically with the flue gas in the core area, make the reducing agent react more fully, greatly improve the denitrification efficiency, reduce the use of reducing agents, and reduce the cost of reducing agents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the overall structure of the denitrification equipment for optimizing flue gas emissions provided by the present invention;

[0021] Figure 2 A schematic diagram of the structure of the denitrification equipment for optimizing flue gas emissions provided by the present invention installed on a boiler;

[0022] Figure 3 A schematic cross-sectional view of a spray pipe in a denitration device for optimizing flue gas emissions provided by the present invention;

[0023] Figure 4 A schematic diagram of the internal structure of a spray pipe in a denitrification device for optimizing flue gas emissions provided by the present invention;

[0024] Figure 5 A schematic structural diagram of a single ejection assembly in the denitration equipment for optimizing flue gas emissions provided by the present invention;

[0025] Figure 6 A schematic structural diagram of a premixing mounting base in a denitration device for optimizing flue gas emissions provided by the present invention;

[0026] Figure 7 A schematic diagram of the structure of a premixing element in a denitration device for optimizing flue gas emissions provided by the present invention;

[0027] Figure 8 A schematic cross-sectional view of a premixing element in a denitration device for optimizing flue gas emissions provided by the present invention;

[0028] Figure 9 A schematic structural diagram of a nozzle mounting base with a nozzle in a denitration device for optimizing flue gas emissions provided by the present invention;

[0029] Figure 10 A schematic structural diagram of one end of a rotary joint in a denitration device for optimizing flue gas emissions provided by the present invention;

[0030] Figure 11 A schematic cross-sectional view of the connection between the nozzle assembly and the rotary joint in the denitrification equipment for optimizing flue gas emissions provided by the present invention;

[0031] Figure 12 A schematic cross-sectional view of the nozzle assembly at the premixing element in the denitrification equipment for optimizing flue gas emissions provided by the present invention;

[0032] Figure 13 A schematic diagram of the connection structure between the traveling mechanism and other equipment in the denitrification equipment for optimizing flue gas emissions provided by the present invention;

[0033] Figure 14 This is a schematic structural diagram of the traveling mechanism in the denitrification equipment for optimizing flue gas emissions provided by the present invention.

[0034] In the picture:

[0035] 10-Spraying mechanism;

[0036] 11-Spray pipe fitting; 111-Outer casing; 112-Compressed air pipe; 113-Reducing agent pipe; 1131-Center input pipe; 1132-Lateral elliptical pipe; 114-Cooling water inlet pipe; 115-Cooling water return port; 116-Gear;

[0037] 12-Spray assembly; 121-Premixing module; 1211-Premixing mounting seat; 1212-Premixing element; 12121-Premixing housing; 12122-Premixing jacket; 12123-Premixer; 1213-Compressed air inlet; 1214-Central compressed air outlet channel; 1215-Annular reducing agent outlet space; 122-Spraying assembly; 1221-Nozzle mounting seat; 1222-Nozzle; 123-Premixing connecting pipe;

[0038] 13-end sprinkler;

[0039] 14 - Rotary joint; 141 - Fixed housing; 142 - Rotating mandrel; 1421 - Central reducing agent channel; 1422 - Compressed air communication channel; 1423 - Cooling water inlet communication channel; 1424 - Cooling water return communication channel; 143 - Compressed air annular channel; 144 - Cooling water inlet annular channel; 145 - Cooling water return annular channel; 146 - Reducing agent annular channel;

[0040] 20-rotating mechanism; 21-pinion gear;

[0041] 30 - Traveling mechanism; 31 - Traveling trolley; 311 - Rotating support seat; 312 - End fixing seat; 32 - Traveling driver; 321 - Sprocket; 322 - Driven gear; 33 - Chain guide; 34 - Crank connecting rod; 35 - Traveling wheel mounting seat; 36 - Composite roller bearing;

[0042] 40- bottom guide rail; 41- middle square tube; 42- channel steel;

[0043] 50-Furnace door seal. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] The purpose of the present invention is to provide a denitrification device that optimizes flue gas emissions to solve the problems existing in the prior art, expand the spraying coverage, reduce the use of reducing agents, and reduce the cost of using reducing agents.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Example 1

[0048] This embodiment provides a denitrification device for optimizing flue gas emissions, such as Figures 1 to 14 As shown, it includes a bottom guide rail 40, a walking mechanism 30, a rotating mechanism 20 and a spraying mechanism 10; the bottom guide rail 40 is used to be fixed on the ground; the walking mechanism 30 is arranged on the bottom guide rail 40; the rotating mechanism 20 and the spraying mechanism 10 are both arranged on the walking mechanism 30; the spraying mechanism 10 has a rotatable spray pipe 11, one end of the spray pipe 11 is used to extend into the furnace; the rotating mechanism 20 can drive the spray pipe 11 to rotate around its own axis (the axis of the spray pipe 11); the spray pipe 11 includes a spray pipe 11 arranged from the outside to the inside. The outer sleeve 111, the compressed air pipe 112, the reducing agent pipe 113 and a plurality of cooling water inlet pipes 114; the reducing agent pipe 113 is located in the compressed air pipe 112, and the compressed air pipe 112 is located in the outer sleeve 111; the reducing agent pipe 113 is supplied with reducing agent; the space outside the reducing agent pipe 113 and inside the compressed air pipe 112 is a compressed air cavity, and compressed air is supplied therein; the space outside the compressed air pipe 112 and inside the outer sleeve 111 is a cooling water cavity, and each cooling water inlet pipe 114 is located in a cooling water cavity. In the cavity, the end of each cooling water inlet pipe 114 close to the walking mechanism 30 is used to pass cooling water, and the opening of the end of each cooling water inlet pipe 114 away from the walking mechanism 30 is connected to the cooling water cavity at the end position. The end of the spray pipe 11 close to the walking mechanism 30 is provided with multiple cooling water return ports 115 connected to the cooling water cavity; in the axial direction of the outer sleeve 111, multiple spray assemblies 12 are fixedly arranged in sequence at intervals in the compressed air pipe 112; the spray assembly 12 includes a premixing module 121 and a spray assembly 122 The premixing module 121 has at least one premixing chamber, in which a premixing element 1212 is provided. The reducing agent inlet of the premixing element 1212 is connected to the reducing agent pipe 113, and the compressed air inlet 1213 of the premixing element 1212 is connected to the compressed air chamber; the ejection assembly 122 includes at least one nozzle 1222, and the output port of the premixing element 1212 in each premixing chamber is connected to a nozzle 1222 through a premixing connecting pipe 123; the nozzle 1222 can eject the input material to the outside of the outer sleeve 111.

[0049] By fixing the bottom guide rail 40 to the ground, the walking mechanism 30 can move on the guide rail, so that the entire equipment can be moved along the length or width direction of the furnace, which is convenient for the extension and extension of the spray pipe 11; the rotating mechanism 20 drives the spray pipe 11 to rotate around its own axis, so that the spray angle changes continuously, and the coverage in the circumferential direction is achieved, so that the spraying is no longer limited to a fixed area, and can cover a larger space in the furnace; the spray pipe 11 extends into the furnace, and the multi-layer sleeve structure of multiple cooling water inlet pipes 114, reducing agent pipes 113 and compressed air pipes 112 is used for uniform and stable spraying. Spraying provides a basis, multiple spray components 12 are arranged at intervals in the compressed air pipe 112, each component has a nozzle 1222, and multiple nozzles 1222 are distributed along the axis of the outer sleeve 111, spraying from different positions to the outside of the outer sleeve 111, increasing the spraying range and making the spraying more uniform and comprehensive; the premixing chamber of the premixing module 121 has a premixing element 1212, in which the reducing agent and the compressed air are fully mixed, so that the reducing agent is dispersed more evenly and fully, thereby increasing the contact probability and reaction efficiency with the nitrogen oxides in the flue gas, and reducing the reducing agent under the same denitrification effect. The rotating mechanism 20 and the spray mechanism 10 work together to precisely control the spray position and intensity according to the distribution of nitrogen oxide concentrations at different locations in the furnace, reduce the spraying amount in areas with low nitrogen oxide concentrations, and increase the spraying amount in areas with high concentrations, thereby avoiding blind and excessive spraying of reducing agent, achieving precise denitrification, and reducing unnecessary reducing agent consumption. The above-mentioned measures to reduce the use of reducing agent directly reduce the actual consumption of reducing agent. The compressed air and reducing agent are fully mixed in the premixing module 121, and the precise spraying control improves the utilization rate of reducing agent, reduces the total amount of reducing agent required for the same denitrification effect, and significantly reduces the cost of long-term operation. Since the spray pipe 11 is provided with a water cooling system and is equipped with a traveling mechanism 30, it can perform open flame operations under the combustion state in the furnace and can be applied to environments with different temperatures. Compared with traditional denitrification equipment, the spray pipe 11 can directly reach the core area of ​​combustion in the furnace, directly react with the flue gas in the core area, make the reducing agent react more fully, greatly improve the denitrification efficiency, reduce the use of reducing agent, and reduce the cost of reducing agent.

[0050] Among them, the relevant setting description of the spray mechanism 10 is as follows:

[0051] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 4As shown, an end sprayer 13 is provided at the end of the outer sleeve 111 away from the walking mechanism 30 (the same premixing module 121 provides a premixing function for the end sprayer 13), the end sprayer 13 has an end premixing chamber, an end premixing element 1212 is provided in the end premixing chamber, the reducing agent inlet of the end premixing element 1212 is connected to the reducing agent pipe 113 (the end premixing element 1212 has the same structure as the premixing elements 1212 at other positions), and the compressed air inlet 1213 of the end premixing element 1212 is connected to the compressed air chamber; the output port of the end premixing element 1212 is connected to the end nozzle, which can spray the input material to the outside of the outer sleeve 111.

[0052] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 12 As shown, a rotary joint 14 is provided at one end of the spray pipe 11 close to the walking mechanism 30, and the rotary joint 14 includes a fixed shell 141 and a rotating core shaft 142, and the rotating core shaft 142 is sealed and rotatably arranged in the fixed shell 141; the fixed shell 141 is used to be fixedly arranged on the walking mechanism 30; the fixed shell 141 has a compressed air interface, a cooling water inlet interface, a cooling water return interface and a reducing agent interface; a compressed air annular channel 143, a cooling water inlet annular channel 144, a cooling water return annular channel 145 and a reducing agent annular channel 146 that are independent of each other are provided between the inner wall of the fixed shell 141 and the outer wall of the rotating core shaft 142; the compressed air interface is communicated with the compressed air annular channel 143, the cooling water inlet interface is communicated with the cooling water inlet annular channel 144, the cooling water return interface is communicated with the cooling water return annular channel 145, and the reducing agent interface is communicated with the reducing agent annular channel 146 is connected; one end of the rotating core shaft 142 is used to be fixedly connected to the spray pipe 11; a central reducing agent channel 1421, at least one compressed air connecting channel 1422, at least one cooling water inlet connecting channel 1423 and at least one cooling water return connecting channel 1424 are provided on the rotating core shaft 142; one end of the central reducing agent channel 1421 is connected to the reducing agent annular channel 146, and the other end is connected to the reducing agent pipe 113; one end of each compressed air connecting channel 1422 is connected to the compressed air annular channel 143, and the other end is connected to the compressed air cavity; one end of each cooling water inlet connecting channel 1423 is connected to the cooling water inlet annular channel 144, and the other end is respectively connected to the corresponding cooling water inlet pipe 114; one end of each cooling water return connecting channel 1424 is connected to the cooling water return annular channel 145, and the other end is connected to the cooling water cavity.

[0053] Among the optional solutions of this embodiment, it is more preferred that Figures 3 to 12As shown, the spray assembly 12 includes a premixing mounting seat 1211; the reducing agent pipe 113 includes a central input pipe 1131 and a lateral elliptical pipe 1132, the central input pipe 1131 is coaxially arranged with the compressed air pipe 112, the end of the central input pipe 1131 close to the walking mechanism 30 is the input end, which is used to pass the reducing agent, and the other end is connected to the input end of the lateral elliptical pipe 1132, and the lateral elliptical pipe 1132 is located on one side of the compressed air pipe 112; the premixing mounting seat 1 211 is provided with an elliptical perforation for the lateral elliptical tube 1132 to pass through, and the premixing mounting seat 1211 can be provided with multiple premixing chambers, each premixing chamber is respectively connected to the interior of the lateral elliptical tube 1132 in the elliptical perforation; the ejection assembly 122 also includes a nozzle mounting seat 1221 and multiple nozzles 1222; each premixing connecting pipe 123 is a multi-section bent pipe, and each nozzle 1222 is fixedly arranged on the nozzle mounting seat 1221 around the axis of the compressed air pipe 112.

[0054] Specifically, a nozzle 1222 mounting ring is provided at a position outside the compressed air pipe 112 corresponding to the position of the nozzle mounting seat 1221 and located inside the outer sleeve 111, and a support ring is also provided between the outside of the compressed air pipe 112 and the inside of the outer sleeve 111. The support ring is provided with a fixed penetration hole for the cooling water inlet pipe 114 to pass through, and has a connecting groove for connecting the cooling water on both sides.

[0055] Specifically, a plurality of through-mounting holes are provided on the premixing mounting seat 1211, and the through-mounting holes form a premixing cavity. A premixing element 1212 is installed in each premixing cavity. The premixing element 1212 includes a premixing housing sleeve 12121, a premixing outer sleeve 12122 and a premixer 12123; the premixing housing sleeve 12121 is fixedly arranged in the premixing cavity, the premixing outer sleeve 12122 is fixedly and sealedly arranged in the premixing housing sleeve 12121, and the premixer 12123 is arranged in the premixing outer sleeve 12122; The mixer 12123 has a central compressed air ejection channel 1214, and an annular reducing agent ejection space 1215 is formed between the outer wall of the premixer 12123 and the inner wall of the premixing jacket 12122. The annular reducing agent ejection space 1215 is connected with the lateral elliptical tube 1132 through the premixing chamber, and the central compressed air ejection channel 1214 is connected with the compressed air chamber. The compressed air and reducing agent ejected by the two are ejected at the same outlet position to form a premix, which is ejected through the premixing connecting pipe 123 and the nozzle 1222.

[0056] In an optional solution of this embodiment, it is more preferred that an inspection port is provided on the outer sleeve 111 at a position corresponding to each premixing chamber, and each premixing element 1212 can be taken out from the corresponding inspection port.

[0057] Among them, the relevant setting description of the walking mechanism 30 is as follows:

[0058] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 14 As shown, the walking mechanism 30 includes a walking trolley 31, a walking driver 32, a chain guide 33, a rotating support seat 311 and an end fixing seat 312; the walking trolley 31 is slidably arranged on the bottom guide rail 40; the walking driver 32 is arranged on the walking trolley 31, and the output shaft of the walking driver 32 is fixedly provided with a driving gear; the walking trolley 31 is provided with a gear through hole passing through the upper and lower parts, and a sprocket 321 is rotatably provided in the gear through hole, and the sprocket 321 and the driving gear can be meshed for transmission (the sprocket 321 and the driven gear 322 are coaxially fixed, and the driven gear 322 is meshed for transmission with the driving gear); the chain guide 33 is fixedly provided on the upper end surface of the bottom guide rail 40 (the chain guide 33 is composed of two parallel pin side plates and a plurality of pins, and the two ends of each pin are respectively connected to the opposite The corresponding pin side plates are fixed, and the pins are arranged in parallel and at intervals, and they cooperate with the sprocket 321 to achieve mutual meshing); the sprocket 321 is meshed with the chain guide 33; the rotating support seat 311 and the end fixing seat 312 are both fixedly set on the walking trolley 31; a rotating through hole is opened on the rotating support seat 311, and the spray pipe 11 is rotatably set in the rotating through hole (the spray pipe 11 is rotatably set in the rotating through hole through a bearing), the rotating mechanism 20 (such as a servo motor) is fixedly set on the rotating support seat 311, and a large gear 116 is fixedly set on the outer sleeve 111 of the spray pipe 11, and a small gear 21 is fixedly set on the output shaft of the rotating mechanism 20, and the small gear 21 is meshed with the large gear 116 for transmission; the fixed shell 141 of the rotary joint 14 is fixedly set on the end fixing seat 312.

[0059] Among the optional solutions of this embodiment, it is more preferred that Figure 13 and Figure 14 As shown, a crank link 34 (which serves as a manual drive interface) is fixedly provided on the driving gear, and a link bracket is fixedly provided on the walking trolley 31. A link mounting hole is provided on the link bracket, and the crank link 34 is rotatably set in the link mounting hole through a bearing.

[0060] Among them, the relevant setting instructions for the bottom guide rail 40 are as follows:

[0061] Among the optional solutions of this embodiment, it is more preferred that Figure 13 and Figure 14 As shown, the bottom guide rail 40 includes a central square tube 41 and channel steels 42 fixedly arranged on both sides of the central square tube 41; two front-to-rear arranged walking wheel mounting seats 35 are fixedly provided on both sides of the walking trolley 31, and each walking wheel mounting seat 35 is rotatably provided with a composite roller bearing 36, and the composite roller bearing 36 is located in the groove of the corresponding channel steel 42.

[0062] Specifically, the traveling wheel mounting seat 35 is provided with a mounting groove corresponding to the mounting position of the composite roller bearing 36 , and the composite roller bearing 36 can be adjusted up and down in the corresponding mounting groove through a gasket.

[0063] Specifically, both ends of the groove of each channel steel 42 are fixedly provided with limit blocks; and the end of the bottom guide rail 40 close to the rotary joint 14 and the end away from the rotary joint 14 are fixedly provided with limit switches.

[0064] Among them, about other related settings:

[0065] Among the optional solutions of this embodiment, it is more preferred that Figures 1 and 2 and Figures 13 and 14 As shown, an annular furnace door seal 50 is fixedly mounted on the outer sleeve 111. The furnace door seal 50 is used to connect with the furnace door docking device. The furnace door docking device has a through-hole for the spray pipe 11 to pass through. The furnace door seal 50 can seal the outside of the through-hole. The furnace door docking device contains an air cooling chamber and a water cooling chamber. (The water cooling chamber has an upper interface and a lower interface for the inflow and outflow of cooling water. It is annular in shape. The air cooling chamber is also annular and is located inside the water cooling chamber. The end of the air cooling chamber away from the furnace cavity is provided with an air cooling inlet, and the end of the air cooling chamber close to the furnace cavity is provided with an annular air outlet.)

[0066] Among the optional solutions of this embodiment, it is more preferred that Figure 1 As shown, a detachable U-shaped clamp block is respectively provided on the channel steels 42 on both sides; the U-shaped clamp block is fixedly clamped on the upper end flange of the channel steel 42 on the corresponding side.

[0067] Specifically, two threaded holes are provided on the upper end of the U-shaped clamp block. A bolt is threadedly connected to each threaded hole. The threaded end of the bolt passes through the threaded hole and abuts against the upper plane of the channel steel 42 .

[0068] Specifically, an avoidance groove for avoiding each cooling water inlet pipe 114 is provided on the mounting ring of the nozzle 1222 .

[0069] Specifically, in order to avoid the installation position of the premixing module 121 and the spraying assembly 122, the cooling water supply pipe can also be provided with a reasonable bend.

[0070] Specifically, each pipeline connection is provided with necessary sealing elements that are suitable for the use environment, such as sealing rings, etc., according to the use requirements, to achieve the necessary sealed communication between the pipelines.

[0071] Specifically, to ensure safety, a necessary front guard is provided at the position where the large gear 116 and the small gear 21 are engaged corresponding to the outer sleeve 111; a necessary outer protective cover can also be provided at the position where the driving gear and the sprocket 321 are corresponding to the rotary joint 14 and the rotary support seat.

[0072] Specifically, a drag chain mechanism is also provided, and corresponding drag chain mounting brackets are also provided on the traveling trolley 31 and on the ground; each pipeline is moved along by the drag chain mechanism; the drag chain mechanism is an existing technology and will not be described in detail here.

[0073] Specifically, the bottom guide rail 40 may be fixed to the ground through a plurality of parallel and spaced-apart mounting base plates.

[0074] Specifically, in addition to the above corresponding structures, the movement of the walking trolley 31 on the bottom guide rail 40 can also be achieved by using existing structures such as gear racks, screw guides, etc., which will not be described in detail here.

[0075] Specifically, the driving components used for the rotation and movement of the components on the equipment are not limited to hydraulic motors, stepper motors, etc.

[0076] Specifically, in addition to the above positions, the reducing agent and the compressed air can also be premixed directly at the nozzle 1222 and directly sprayed out.

[0077] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A denitrification device for optimizing flue gas emissions, characterized by: Including bottom guide rail, walking mechanism, rotating mechanism and spraying mechanism; The bottom guide rail is used to be fixed on the ground; the walking mechanism is arranged on the bottom guide rail; the rotating mechanism and the spraying mechanism are both arranged on the walking mechanism; The spray mechanism has a rotatable spray pipe, one end of which is used to extend into the furnace; the rotating mechanism can drive the spray pipe to rotate around its own axis; The spray pipe fitting includes an outer sleeve, a compressed air pipe, a reducing agent pipe and a plurality of cooling water inlet pipes arranged from the outside to the inside; the reducing agent pipe is located in the compressed air pipe, and the compressed air pipe is located in the outer sleeve; the reducing agent pipe is supplied with reducing agent; the space located outside the reducing agent pipe and inside the compressed air pipe is a compressed air cavity, inside which compressed air is supplied; the space located outside the compressed air pipe and inside the outer sleeve is a cooling water cavity, each of the cooling water inlet pipes is located in the cooling water cavity, one end of each cooling water inlet pipe close to the walking mechanism is used to pass cooling water, and the opening of each cooling water inlet pipe at one end away from the walking mechanism is connected to the cooling water cavity at the end position, and one end of the spray pipe fitting close to the walking mechanism is provided with a plurality of cooling water return ports connected to the cooling water cavity; In the axial direction of the outer sleeve, a plurality of spray assemblies are fixedly arranged in sequence at intervals in the compressed air pipe; the spray assembly includes a premixing module and a spray assembly; the premixing module has a plurality of premixing chambers, and a premixing element is provided in the premixing chamber, and the reducing agent inlet of each premixing element is connected to the reducing agent pipe, and the compressed air inlet of each premixing element is connected to the compressed air chamber; the spray assembly includes a plurality of nozzles arranged in sequence along the axial direction of the outer sleeve, and the nozzles correspond to the premixing chambers one by one, and the output ports of the premixing elements in the premixing chambers are respectively connected to one of the nozzles through a premixing connecting pipe; the nozzles can spray the input material to the outside of the outer sleeve.

2. The denitrification equipment for optimizing flue gas emissions according to claim 1, characterized in that: An end sprayer is provided at one end of the outer sleeve away from the walking mechanism, and the end sprayer has an end premixing chamber. The end premixing element is provided in the end premixing chamber, the reducing agent inlet of the end premixing element is communicated with the reducing agent pipe, and the compressed air inlet of the end premixing element is communicated with the compressed air chamber; the output port of the end premixing element is connected to the end nozzle, and the end nozzle can spray the input material to the outside of the outer sleeve.

3. The denitrification equipment for optimizing flue gas emissions according to claim 1, characterized in that: The spray pipe is provided with a rotary joint at one end close to the walking mechanism, and the rotary joint includes a fixed shell and a rotating core shaft, and the rotating core shaft is sealed and rotatably arranged in the fixed shell; The fixed housing is used to be fixedly arranged on the walking mechanism; the fixed housing is provided with a compressed air interface, a cooling water inlet interface, a cooling water return interface and a reducing agent interface; a compressed air annular channel, a cooling water inlet annular channel, a cooling water return annular channel and a reducing agent annular channel that are independent of each other are provided between the inner side wall of the fixed housing and the outer side wall of the rotating core shaft; the compressed air interface is communicated with the compressed air annular channel, the cooling water inlet interface is communicated with the cooling water inlet annular channel, the cooling water return interface is communicated with the cooling water return annular channel, and the reducing agent interface is communicated with the reducing agent annular channel; One end of the rotating core shaft is used to be fixedly connected to the spray pipe; a central reducing agent channel, at least one compressed air connecting channel, at least one cooling water inlet connecting channel and at least one cooling water return connecting channel are provided on the rotating core shaft; one end of the central reducing agent channel is connected to the reducing agent annular channel, and the other end is connected to the reducing agent pipe; one end of each of the compressed air connecting channels is connected to the compressed air annular channel, and the other end is connected to the compressed air cavity; one end of each of the cooling water inlet connecting channels is connected to the cooling water inlet annular channel, and the other end is respectively connected to the corresponding cooling water inlet pipe; one end of each of the cooling water return connecting channels is connected to the cooling water return annular channel, and the other end is connected to the cooling water cavity.

4. The denitrification equipment for optimizing flue gas emissions according to claim 1, characterized in that: The spray assembly includes a premix mounting seat; The reducing agent pipe includes a central input pipe and a lateral elliptical pipe. The central input pipe is coaxially arranged with the compressed air pipe. One end of the central input pipe close to the walking mechanism is an input end for introducing the reducing agent, and the other end is connected to the input end of the lateral elliptical pipe. The lateral elliptical pipe is located on one side inside the compressed air pipe. The premixing mounting seat is provided with an elliptical through-hole for the lateral elliptical tube to pass through, and the premixing mounting seat can be provided with a plurality of premixing cavities, each of which is communicated with the interior of the lateral elliptical tube in the elliptical through-hole; The spray assembly further includes a nozzle mounting seat and a plurality of nozzles; each of the premixed connecting pipes is a multi-section bent pipe, and each of the nozzles is fixedly arranged on the nozzle mounting seat around the axis of the compressed air pipe.

5. The denitrification equipment for optimizing flue gas emissions according to claim 3, characterized in that: The walking mechanism includes a walking trolley, a walking driver, a chain guide rail, a rotating support seat and an end fixing seat; The walking trolley is slidably arranged on the bottom guide rail; The travel driver is arranged on the travel trolley, and the output shaft of the travel driver is fixedly provided with a driving gear; the travel trolley is provided with a gear through hole which passes through the upper and lower parts, and a sprocket is rotatably provided in the gear through hole, and the sprocket and the driving gear can be meshed and transmitted; The chain guide is fixedly arranged on the upper end surface of the bottom guide; the sprocket is engaged with the chain guide; The rotating support seat and the end fixing seat are both fixedly arranged on the walking trolley; a rotating through-hole is opened on the rotating support seat, and the spray pipe is rotatably arranged in the rotating through-hole; the rotating mechanism is fixedly arranged on the rotating support seat, and a large gear is fixedly arranged on the outer sleeve of the spray pipe, and a small gear is fixedly arranged on the output shaft of the rotating mechanism, and the small gear is meshed with the large gear for transmission; the fixed shell of the rotary joint is fixedly arranged on the end fixing seat.

6. The denitrification equipment for optimizing flue gas emissions according to claim 5, characterized in that: A crank connecting rod is also fixedly provided on the driving gear, a connecting rod bracket is fixedly provided on the walking trolley, a connecting rod mounting hole is opened on the connecting rod bracket, and the crank connecting rod is rotatably arranged in the connecting rod mounting hole through a bearing.

7. The denitrification equipment for optimizing flue gas emissions according to claim 1, characterized in that: An inspection port is provided on the outer sleeve at a position corresponding to each premixing chamber, and each premixing element can be taken out from the corresponding inspection port.

8. The denitrification equipment for optimizing flue gas emissions according to claim 1, characterized in that: An annular furnace door seal is fixedly sleeved on the outer sleeve, and the furnace door seal is used to dock with the furnace door docking device. The furnace door docking device has a through hole for the spray pipe to pass through. The furnace door seal can seal and block the outside of the through hole, and the furnace door docking device has an air cooling chamber and a water cooling chamber.

9. The denitrification equipment for optimizing flue gas emissions according to claim 5, characterized in that: The bottom guide rail includes a central square tube and channel steels fixedly arranged on both sides of the central square tube; Two front-to-rear travel wheel mounting seats are fixedly provided on both sides of the travel trolley, and a composite roller bearing is rotatably provided on each of the travel wheel mounting seats. The composite roller bearing is located in the groove of the corresponding channel steel.

10. The denitrification equipment for optimizing flue gas emissions according to claim 9, characterized in that: A detachable U-shaped clamp block is respectively provided on the channel steels on both sides; The U-shaped clamp block is fixedly clamped on the upper end flange of the channel steel on the corresponding side.

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