Structure for improving denitration spray gun muzzle crystallization

Abstract

The utility model belongs to the technical field of dust removal equipment, and particularly relates to a structure for improving denitration spray gun muzzle crystallization, which comprises a reactor, the right side of the reactor is fixedly communicated with a flue, and the right end of the flue is provided with a smoke inlet. Compressed gas and a reducing agent solution are mixed through a liquid inlet assembly and an atomized air inlet assembly, the mixed gas is mixed with flue gas after being atomized and sprayed out of a spray head, and the mixed flue gas enters a reactor to be subjected to a catalytic reaction; cooling air enters the spray gun from the cooling air inlet through the cooling air inlet assembly to cool the spray gun, the left side of the inner pipe of the spray gun is fixedly sleeved with the flow guide pipe, and the flow guide pipe is in a funnel shape, so that smoke flows through the flow guide pipe to be diffused and is not attracted by a vacuum area of the spray head; and the situation that the spray gun cannot work due to the fact that dust in smoke adheres to the spray head or is combined with a reducing agent solution to form hard crystals is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to dust removal equipment technical field, concretely is a structure of improving denitration spray gun mouth crystallization. BACKGROUND

[0002] SCR (selective catalytic reduction) denitration technology is the most widely used flue gas denitration technology at present, and is mainly used for reducing nitrogen oxides (NOx) discharged by industrial facilities such as coal-fired boilers and oil-fired boilers. In the SCR system, the spray gun is a very important component, which is responsible for uniformly spraying the reducing agent (usually ammonia water or urea solution) into the flue gas stream, and chemically reacting with NOx, so as to achieve the purpose of removing NOx.

[0003] In the prior art, the SCR process needs to spray ammonia water or urea solution as a reducing agent to remove NOX in flue gas. The flue gas often contains a large amount of dust, the spray speed at the spray port of the spray gun is fast, a vacuum zone is easily formed, the flue gas is attracted, the flue gas contains a large amount of dust, and hard crystalline bodies are easily formed by sticking at the gun port or combining with the reducing agent solution, thereby causing the spray head to be blocked and unable to continue to be used. In order to avoid the dust in the flue gas from sticking at the gun port or combining with the reducing agent solution to form hard crystalline bodies and cause the spray gun to be unable to work, the utility model provides a structure for improving denitration spray gun port crystallization. CONTENT OF THE UTILITY MODEL

[0004] In view of the defects of the prior art, the utility model provides a structure for improving denitration spray gun port crystallization. A liquid inlet and an atomizing air inlet are formed in the right side of the spray gun inner tube. Compressed gas and reducing agent solution are mixed by the liquid inlet assembly and the atomizing air inlet assembly, sprayed out from the spray head, mixed with the flue gas, and then enter the reactor for catalytic reaction. A cooling air inlet is formed in the right bottom of the cooling air sleeve pipe. The cooling air enters the cooling air inlet through the cooling air inlet assembly to cool the spray gun. A flow guide pipe is fixedly sleeved to the left side of the spray gun inner tube. The flow guide pipe is funnel-shaped, so that the flue gas diffuses when flowing through the flow guide pipe and is not attracted by the vacuum zone of the spray head. The dust in the flue gas is prevented from sticking at the spray head or combining with the reducing agent solution to form hard crystalline bodies and cause the spray gun to be unable to work. A rotary spray head assembly is installed at the left end of the spray gun inner tube. The rotary spray head assembly is fixedly connected to the spray head through a fixed rod. A plurality of spiral blades are fixedly connected to the outer surface of the fixed rod. When the reducing agent and the compressed gas are mixed and sprayed out, the gas pushes the spiral blades to drive the spray head to rotate. The rotation of the spray head makes the atomization of the reducing agent solution more uniform, and the problems in the background are solved.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved structure for crystallization at the nozzle of a denitrification spray gun, comprising a reactor, a flue fixedly connected to the right side of the reactor, a flue gas inlet at the right end of the flue, an air outlet at the bottom of the reactor, several sets of catalysts inside the reactor, a mounting frame on the right side of the flue, a mounting plate one fixedly connected to the middle of the mounting frame, a mounting plate two fixedly connected to the top of the mounting frame, several buried pipes fixedly passing through the right side of the flue, a cooling air sleeve fixedly connected to the inner wall of the buried pipes, a spray gun inner tube passing through the cooling air sleeve, a liquid inlet and an atomizing air inlet on the right side of the spray gun inner tube, a cooling air inlet at the bottom right side of the cooling air sleeve, a guide pipe fixedly sleeved on the left side of the spray gun inner tube, and a rotating nozzle assembly installed at the left end of the spray gun inner tube, and a liquid inlet assembly, a cooling air inlet assembly, and an atomizing air inlet assembly installed on the mounting frame.

[0006] Preferably, the rotary nozzle assembly includes a threaded sleeve, which is fixedly connected to the left end of the inner tube of the spray gun. A fixed sleeve is threaded onto the threaded sleeve, and a bearing is provided between the threaded sleeve and the fixed sleeve. A nozzle is rotatably connected to the bearing. A connecting plate is fixedly connected to the right side of the nozzle, and a fixed rod is fixedly connected to the middle of the right side of the connecting plate. Several helical blades are fixedly connected to the outer surface of the fixed rod.

[0007] Preferably, the liquid inlet assembly includes a liquid storage tank, which is fixedly installed on the top left side of the mounting plate. A liquid pump is fixedly connected to the front side of the liquid storage tank via a pipe. The output end of the liquid pump is fixedly connected to an inlet pipe, and several sets of liquid inlets are fixedly connected to the inlet pipe.

[0008] Preferably, the cooling air intake assembly includes a blower, which is fixedly installed on the top front side of the mounting plate two. The output end of the blower is fixedly connected to a cold air duct, and a plurality of the cooling air inlets are fixedly connected to the cold air duct.

[0009] Preferably, the atomizing air intake assembly includes a compressor and a compressed air cylinder. The compressor and the compressed air cylinder are both fixedly installed on the top right side of the mounting plate. The output end of the compressor is fixedly connected to the front side of the compressed air cylinder. The output end of the compressed air cylinder is fixedly connected to a compressed air pipe. A plurality of atomizing air inlets are fixedly connected to the compressed air pipe.

[0010] Preferably, a bolt is threaded through the cooling air sleeve, and the end of the bolt near the inner tube of the spray gun abuts against the outer surface of the inner tube of the spray gun.

[0011] This invention provides an improved structure for crystallization at the nozzle of a denitrification spray gun. Compared with the prior art, it has the following advantages:

[0012] 1. The structure of the improved denitration spray gun nozzle crystal, the right side of the spray gun inner tube is provided with a liquid inlet and an atomizing air inlet, compressed gas and reducing agent solution are mixed through the liquid inlet assembly and the atomizing air inlet assembly, and are sprayed out from the spray head to mix with flue gas, the mixed flue gas enters a reactor to perform a catalytic reaction, a cooling air inlet is formed at the right bottom of the cooling air sleeve pipe, cooling air enters the cooling air inlet through the cooling air inlet assembly to cool the spray gun, and a flow guide pipe is fixedly sleeved with the left side of the spray gun inner tube, the flow guide pipe is funnel-shaped, flue gas flows through the flow guide pipe to diffuse, is not attracted by the vacuum area of the spray head, and dust in the flue gas is prevented from being bonded at the spray head or combined with the reducing agent solution to form hard crystal bodies to cause the spray gun to be unable to work.

[0013] 2. The structure of the improved denitration spray gun nozzle crystal, a rotary spray head assembly is installed at the left end of the spray gun inner tube, the rotary spray head assembly is provided with a fixed rod fixedly connected with the spray head, and a plurality of spiral blades are fixedly connected to the outer surface of the fixed rod, when the reducing agent and compressed gas are mixed and sprayed out, the gas pushes the spiral blades to drive the spray head to rotate, and the rotation makes the atomization of the spray head on the reducing agent solution more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the utility model main part;

[0015] Figure 2 It is a front view cross section structural schematic diagram of the utility model main part;

[0016] Figure 3 It is a spray gun structural schematic diagram of the utility model;

[0017] Figure 4 It is a spray gun cross section structural schematic diagram of the utility model;

[0018] Figure 5 It is a spray gun cross section structural schematic diagram of the utility model; Figure 4 It is an enlarged schematic diagram of structure A in the utility model.

[0019] In the drawing: 1, reactor; 2, mounting frame; 3, mounting plate one; 4, mounting plate two; 5, flue gas inlet; 6, compressed air blower; 7, compressed gas cylinder; 8, liquid pump; 9, air blower; 10, liquid storage tank; 11, liquid inlet pipe; 12, cooling air pipe; 13, compressed gas pipe; 14, catalyst; 15, air outlet; 16, flue; 17, flow guide pipe; 18, buried pipe; 19, cooling air sleeve pipe; 20, spray gun inner tube; 21, cooling air inlet; 22, liquid inlet; 23, atomizing air inlet; 24, bolt; 25, threaded sleeve; 26, fixed sleeve; 27, spray head; 28, bearing; 29, connecting plate; 30, fixed rod; 31, spiral blade. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] Please refer to Figures 1-5 The utility model provides a technical scheme: an improved structure of denitration spray gun nozzle crystallization, including reactor 1, the right side of reactor 1 is fixedly connected with flue 16, the right end of flue 16 is provided with inlet 5, the bottom side of reactor 1 is provided with air outlet 15, the inside of reactor 1 is provided with several groups of catalyst 14, the right side of flue 16 is provided with mounting bracket 2, the middle part of mounting bracket 2 is fixedly connected with mounting plate one 3, the top side of mounting bracket 2 is fixedly connected with mounting plate two 4, the right side of flue 16 is still fixedly provided with several buried pipes 18, the inner wall of buried pipe 18 is fixedly connected with cooling wind sleeve pipe 19, the upper part of cooling wind sleeve pipe 19 is provided with spray gun inner tube 20, the right side of spray gun inner tube 20 is provided with liquid inlet 22 and atomizing air inlet 23, the right side bottom of cooling wind sleeve pipe 19 is provided with cooling air inlet 21, the left side of spray gun inner tube 20 is fixedly sleeved with flow guide pipe 17, and the left end of spray gun inner tube 20 is provided with rotary spray head assembly, and mounting bracket 2 is provided with liquid inlet assembly, cooling air inlet assembly and atomizing air inlet assembly.

[0022] When the equipment is used, flue gas enters flue 16 from inlet 5, reducer solution and compressed gas are mixed through liquid inlet assembly and atomizing air inlet assembly, are atomized and sprayed out through the rotary spray head assembly arranged at the left end of spray gun inner tube 20, cooling air is made to enter cooling wind sleeve pipe 19 through cooling air inlet 21 through the arrangement of cooling air inlet assembly, spray gun inner tube 20 is cooled, and flow guide pipe 17 is fixedly sleeved with the left side of spray gun inner tube 20, the flow guide pipe 17 is funnel-shaped, when flue gas flows through the flow guide pipe 17 and is diffused, is not attracted by the vacuum area generated by spray head 27, avoids that the dust in flue gas is bonded or combined with reducer solution to form hard crystalline body at spray head 27, and causes the spray gun to be unable to work.

[0023] Rotary spray head assembly includes threaded sleeve 25, threaded sleeve 25 is fixedly connected at the left end of spray gun inner tube 20, threaded sleeve 25 is threadedly sleeved with fixed sleeve 26, bearing 28 is arranged between threaded sleeve 25 and fixed sleeve 26, spray head 27 is rotatably connected on bearing 28, the right side of spray head 27 is fixedly connected with connecting plate 29, the right side middle part of connecting plate 29 is fixedly connected with fixed rod 30, and the outer surface of fixed rod 30 is fixedly connected with several spiral vanes 31.

[0024] When the reducing agent solution is sprayed out from the left end of the inner tube 20 after mixing with compressed gas, the gas pushes the spiral blade 31, thereby driving the fixed rod 30 to rotate, and since the nozzle 27 is rotatably installed on the fixed sleeve 26 through the bearing 28, the nozzle 27 is further driven to rotate, and the rotation makes the atomization of the reducing agent solution by the nozzle 27 more uniform.

[0025] The liquid inlet assembly comprises a liquid storage tank 10 fixedly installed on the top left side of the mounting plate one 3, the front side of the liquid storage tank 10 is fixedly communicated with the liquid pump 8 through a pipeline, the output end of the liquid pump 8 is fixedly communicated with the liquid inlet pipe 11, and a plurality of groups of liquid inlet ports 22 are fixedly communicated with the liquid inlet pipe 11.

[0026] The liquid pump 8 delivers the reducing agent solution in the liquid storage tank 10 to the liquid inlet port 22 through the liquid inlet pipe 11.

[0027] The cooling air inlet assembly comprises a blower 9 fixedly installed on the top front side of the mounting plate two 4, the output end of the blower 9 is fixedly communicated with a cooling air pipe 12, and a plurality of cooling air inlets 21 are fixedly communicated with the cooling air pipe 12.

[0028] The blower 9 delivers the external cooling air to the cooling air inlet 21 through the cooling air pipe 12.

[0029] The atomizing air inlet assembly comprises a compressed air blower 6 and a compressed air cylinder 7, both of which are fixedly installed on the top right side of the mounting plate one 3, the output end of the compressed air blower 6 is fixedly communicated with the front side of the compressed air cylinder 7, the output end of the compressed air cylinder 7 is fixedly communicated with a compressed air pipe 13, and a plurality of atomizing air inlets 23 are fixedly communicated with the compressed air pipe 13.

[0030] The compressed air blower 6 generates compressed air which is stored in the compressed air cylinder 7, and when the equipment works, the compressed air in the compressed air cylinder 7 is delivered to the atomizing air inlet 23 through the compressed air pipe 13.

[0031] The cooling air sleeve pipe 19 is threaded with a bolt 24, one end of the bolt 24 close to the inner tube 20 abuts against the outer surface of the inner tube 20, and the bolt 24 is used to fixedly install the cooling air sleeve pipe 19 on the inner tube 20.

[0032] Working principle: when the device is used, flue gas enters flue 16 from smoke inlet 5, liquid pump 8 is started to deliver the reducing agent solution in liquid storage tank 10 to liquid inlet 22 through liquid inlet pipe 11, and compressed gas generated by compressed air fan 6 is stored in compressed gas cylinder 7, at this time, the compressed gas in compressed gas cylinder 7 is delivered to atomizing air inlet 23 through compressed gas pipe 13, the reducing agent solution is mixed with the compressed gas, and when the reducing agent solution is sprayed from the left end of spray gun inner tube 20, the gas pushes helical blade 31, thereby driving fixed rod 30 to rotate, since spray head 27 is rotatably installed on fixed sleeve 26 through bearing 28, fixed sleeve 26 drives spray head 27 to rotate, and the rotation makes the atomization of reducing agent solution by spray head 27 more uniform, and air blower 9 is arranged to deliver the external cold air to cooling air inlet 21 through cooling air pipe 12 into cooling air sleeve pipe 19 to cool spray gun inner tube 20, so as to avoid damage to spray gun inner tube 20 caused by high temperature, and the left side of spray gun inner tube 20 is fixed with flow guide pipe 17, which is in the shape of a funnel, when flue gas flows through flow guide pipe 17 and is diffused, it is not attracted by the vacuum area generated by spray head 27, so as to avoid that the dust in flue gas is adhered to spray head 27 or combined with the reducing agent solution to form hard crystalline, thereby causing the spray gun to be unable to work.

[0033] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An improved structure of crystallization of the nozzle of a denitration lance, comprising a reactor (1), characterized in that: The right side of the reactor (1) is fixedly communicated with a flue (16), the right end of the flue (16) is provided with an air inlet (5), the bottom side of the reactor (1) is provided with an air outlet (15), the inside of the reactor (1) is provided with a plurality of groups of catalysts (14), the right side of the flue (16) is provided with a mounting bracket (2), the middle part of the mounting bracket (2) is fixedly connected with a mounting plate one (3), the top side of the mounting bracket (2) is fixedly connected with a mounting plate two (4), the right side of the flue (16) is also fixedly provided with a plurality of buried pipes (18), the inner wall of the buried pipe (18) is fixedly connected with a cooling air sleeve pipe (19), the cooling air sleeve pipe (19) is provided with a spray gun inner pipe (20), the right side of the spray gun inner pipe (20) is provided with a liquid inlet (22) and an atomizing air inlet (23), the right side bottom of the cooling air sleeve pipe (19) is provided with a cooling air inlet (21), the left side of the spray gun inner pipe (20) is fixedly sleeved with a flow guide pipe (17), and the left end of the spray gun inner pipe (20) is provided with a rotating spray head assembly, the mounting bracket (2) is provided with a liquid inlet assembly, a cooling air inlet assembly and an atomizing air inlet assembly.

2. The improved structure of a denitration injection gun nozzle crystal according to claim 1, characterized in that: The rotating spray head assembly comprises a threaded sleeve (25), the threaded sleeve (25) is fixedly connected with the left end of the spray gun inner pipe (20), the threaded sleeve (25) is threadedly sleeved with a fixed sleeve (26), the threaded sleeve (25) and the fixed sleeve (26) are provided with a bearing (28), the bearing (28) is rotatably connected with a spray head (27), the right side of the spray head (27) is fixedly connected with a connecting plate (29), the right side middle part of the connecting plate (29) is fixedly connected with a fixed rod (30), and the outer surface of the fixed rod (30) is fixedly connected with a plurality of helical blades (31).

3. The improved structure of a denitration injection gun nozzle crystal according to claim 2, characterized in that: The liquid inlet assembly comprises a liquid storage tank (10), the liquid storage tank (10) is fixedly installed on the top left side of the mounting plate one (3), the front side of the liquid storage tank (10) is fixedly communicated with a liquid pump (8) through a pipeline, the output end of the liquid pump (8) is fixedly communicated with a liquid inlet pipe (11), and a plurality of groups of the liquid inlets (22) are fixedly communicated with the liquid inlet pipe (11).

4. The improved structure of a denitration injection gun nozzle crystal according to claim 3, characterized in that: The cooling air inlet assembly comprises an air blower (9), the air blower (9) is fixedly installed on the top front side of the mounting plate two (4), the output end of the air blower (9) is fixedly communicated with a cooling air pipe (12), and a plurality of the cooling air inlets (21) are fixedly communicated with the cooling air pipe (12).

5. The improved structure of a denitration injection gun nozzle crystal according to claim 4, characterized in that: The atomizing air inlet assembly comprises a compressed air blower (6) and a compressed gas cylinder (7), the compressed air blower (6) and the compressed gas cylinder (7) are fixedly installed on the top right side of the mounting plate one (3), the output end of the compressed air blower (6) is fixedly communicated with the front side of the compressed gas cylinder (7), the output end of the compressed gas cylinder (7) is fixedly communicated with a compressed gas pipe (13), and a plurality of the atomizing air inlets (23) are fixedly communicated with the compressed gas pipe (13).

6. The improved structure of a denitration injection gun nozzle crystal according to claim 5, characterized in that: The cooling air sleeve pipe (19) is threadedly provided with a bolt (24), one end of the bolt (24) close to the spray gun inner pipe (20) is abutted with the outer surface of the spray gun inner pipe (20).

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