Denitration agent spraying device of flue gas denitration equipment

Abstract

The utility model discloses a denitration agent spraying device of flue gas denitration equipment, which belongs to the technical field of flue gas denitration, and comprises a denitration flue and a reducing agent header pipe, and a plurality of outer connecting pipes are fixedly sleeved on the side part of the denitration flue. According to the utility model, when the nozzles spray a reducing agent, the injection branch pipes and the nozzles are driven to reciprocate in the inner cavity of the denitration flue through the screw-thread fit between the reciprocating screw rods and the moving seats, so that the positions of the nozzles for spraying the reducing agent in the denitration flue are adjusted, and the reciprocating directions of the two adjacent injection branch pipes are opposite; according to the denitration agent spraying device of the flue gas denitration equipment, the spraying branch pipes are arranged in the inclined direction, the nozzles located on the spraying branch pipes are arranged in the inclined direction, it is guaranteed that a reducing agent sprayed out of the nozzles is located between the two spraying branch pipes, meanwhile, flue gas flows between the two adjacent spraying branch pipes, it is guaranteed that the flue gas and the reducing agent are fully mixed, the denitration effect is guaranteed, and the working quality of the denitration agent spraying device of the flue gas denitration equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas denitration, more particularly to a denitration agent injection device of flue gas denitration equipment. BACKGROUND

[0002] With the increasingly high national environmental protection requirement, the emission standard of nitrogen oxide is also more strict, wherein the NO x Usually generated by coal-fired industry, is one of the main atmospheric pollutants, and the photochemical smog caused thereby has great harm to soil and aquatic ecosystems, and the selective catalytic reduction flue gas denitration technology currently adopted is the most widely used and highest denitration efficiency technology, which uniformly injects the denitration agent into the flue gas by using an injection system, so that the denitration agent reacts with NO x In the flue gas to generate N2, thereby realizing the denitration treatment of the flue gas.

[0003] After searching, the utility model patent with publication number CN209596934U discloses a SCR denitration reducing agent injection device, which comprises a reducing agent main pipe and a plurality of injection branch pipes installed in a flue, the plurality of injection branch pipes are communicated with the reducing agent main pipe through connecting pipes, a plurality of nozzles are uniformly and interval ly arranged on the injection branch pipes, a first valve, an orifice flowmeter, a compressed air inlet and a blowdown port are arranged on the connecting pipe, a differential pressure measuring device is arranged on the orifice flowmeter, and a purge pipeline is further connected to the reducing agent main pipe; the patent adopts the mode of independent injection pipe into the flue, more nozzles, reducing agent atomization by compressed air, and reduction of support accessories, which can improve the utilization rate of reducing agent, reduce energy consumption, reduce the difficulty of installation and maintenance, and avoid the problem of reducing agent or dust blocking the nozzle and unable to be processed online.

[0004] But the above-mentioned patent still has the following disadvantages: the position of the nozzle in the flue is fixed, and it is inconvenient to ensure that the reducing agent and the flue gas are fully mixed, therefore we propose a denitration agent injection device of flue gas denitration equipment. UTILITY MODEL CONTENT

[0005] In view of the problems in the prior art, the purpose of the utility model is to provide a denitration agent injection device of flue gas denitration equipment.

[0006] To solve the above problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of denitration agent injection device of flue gas denitration equipment, including denitration flue, and reducing agent main pipe, the side of the denitration flue is fixedly sleeved with multiple outer connecting pipes, the end of multiple outer connecting pipes is equipped with outer mounting cylinder respectively, the middle part of multiple outer mounting cylinders is movably sleeved with injection branch pipe, one end of multiple injection branch pipes is extended to the inner chamber of denitration flue, the both sides of the top of injection branch pipe one end are fixedly installed with multiple nozzles respectively, the other end of injection branch pipe is provided with plug, the side of reducing agent main pipe is fixedly connected with multiple liquid guide hose, the end of multiple liquid guide hose is respectively sleeved on the outside of plug, the outside of outer mounting cylinder is fixedly connected with L-shaped support, reciprocating screw rod is rotatably connected between L-shaped support and outer mounting cylinder, the outside of L-shaped support is fixedly installed with servo motor, the output shaft of servo motor and the end of reciprocating screw rod are connected, the outside of reciprocating screw rod is threadedly sleeved with moving seat, the top of moving seat is installed with fixed cover, fixed cover and moving seat are sleeved on the outside of injection branch pipe.

[0008] As a preferred scheme of the utility model, the top surface of the moving seat and the bottom of the fixed cover are provided with clamping grooves, the inner diameter of the clamping grooves is equal to the outer diameter of the injection branch pipe, and the two sides of the fixed cover and the moving seat are threadedly installed with second bolts.

[0009] As a preferred scheme of the utility model, the end of the outer connecting pipe is fixedly sleeved with a first flange, the end of the outer mounting cylinder is fixedly sleeved with a second flange, and a plurality of first bolts are threadedly installed between the second flange and the first flange.

[0010] As a preferred scheme of the utility model, an active hole is formed in the outside of the outer mounting cylinder, a sealing rubber ring is fixedly connected to the inner wall of the active hole, the inner side surface of the sealing rubber ring is in abutment with the outer side surface of the injection branch pipe, and the injection branch pipe penetrates the inner cavity of the active hole.

[0011] As a preferred scheme of the utility model, a flow valve is fixedly installed on each of the plurality of liquid guide hoses.

[0012] As a preferred scheme of the utility model, the bottom surface of the moving seat is in abutment with the top surface of the inside of the L-shaped support.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses a denitration flue and the spray branch pipe and the nozzle are reciprocatingly moved in the inner chamber of denitration flue through the screw thread cooperation between reciprocating screw rod and mobile seat, thereby adjusting the position of nozzle in denitration flue and making the direction of reciprocating movement of two adjacent spray branch pipes opposite, and the nozzle on the spray branch pipe is arranged obliquely upward, guaranteeing that the reducing agent sprayed by nozzle is located between two spray branch pipes, and at the same time, the flue gas flows between two adjacent spray branch pipes, guaranteeing that the flue gas and reducing agent are fully mixed, guaranteeing the effect of denitration, and improving the working quality of denitration agent injection device of the flue gas denitration equipment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the structure schematic diagram of the denitration flue of the utility model;

[0017] Figure 3 It is the installation schematic diagram of the outer installation cylinder and the spray branch pipe of the utility model;

[0018] Figure 4 It is the structure schematic diagram of the outer installation cylinder of the utility model;

[0019] Figure 5 It is the structure schematic diagram of the spray branch pipe of the utility model.

[0020] Mark explanation in drawing:

[0021] 1, denitration flue;2, reducing agent main pipe;3, outer connecting pipe;4, outer installation cylinder;5, spray branch pipe;6, nozzle;7, liquid guide hose;8, plug;9, L-shaped support;10, reciprocating screw rod;11, servo motor;12, mobile seat;13, fixed cover;14, first flange;15, second flange;16, first bolt;17, movable hole;18, sealing rubber ring;19, clamping groove;20, second bolt;21, flow valve. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.

[0023] In the description of the utility model, it is necessary to explain that, the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it is necessary to explain that, unless otherwise expressly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Embodiment:

[0026] Please refer to Figures 1-5 A denitration agent injection device of a flue gas denitration equipment, comprising a denitration flue 1 and a reducing agent main pipe 2, a plurality of outer connecting pipes 3 are fixedly sleeved on the side of the denitration flue 1, outer mounting barrels 4 are respectively installed at the ends of the plurality of outer connecting pipes 3, injection branch pipes 5 are movably sleeved at the middle parts of the plurality of outer mounting barrels 4, one end of the plurality of injection branch pipes 5 extends to the inner cavity of the denitration flue 1, a plurality of nozzles 6 are fixedly installed on the both sides of the top of one end of the injection branch pipe 5, a plug 8 is arranged at the other end of the injection branch pipe 5, a plurality of liquid guide hoses 7 are fixedly connected to the side of the reducing agent main pipe 2, the ends of the plurality of liquid guide hoses 7 are sleeved on the outside of the plug 8, L-shaped supports 9 are fixedly connected to the outside of the outer mounting barrels 4, a reciprocating screw rod 10 is rotatably connected between the L-shaped support 9 and the outer mounting barrel 4, a servo motor 11 is fixedly installed on the outside of the L-shaped support 9, the output shaft of the servo motor 11 is connected with the end of the reciprocating screw rod 10, a moving seat 12 is threadedly sleeved on the outside of the reciprocating screw rod 10, a fixed cover 13 is installed on the top end of the moving seat 12, and the fixed cover 13 and the moving seat 12 are sleeved on the outside of the injection branch pipe 5.

[0027] In the embodiment, the end of the reducing agent main pipe 2 is connected with a reducing agent supply equipment, wherein the reducing agent can be ammonia water, and the end of the liquid guide hose 7 is in interference fit with the plug 8, so that the liquid guide hose 7 and the plug 8 are tightly connected.

[0028] Specifically, please refer to Figure 3 And Figure 4The top surface of the moving seat 12 and the bottom of the fixed cover 13 are provided with clamping grooves 19, the inner diameter of the clamping grooves 19 is equal to the outer diameter of the spray branch pipe 5, and the two sides of the fixed cover 13 and the moving seat 12 are respectively screwed with second bolts 20.

[0029] In the embodiment, the spray branch pipe 5 is fixed on the outer mounting cylinder 4 through the cooperation of the fixed cover 13, the moving seat 12 and the second bolts 20, and the moving seat 12 and the spray branch pipe 5 are driven to reciprocate through the threaded cooperation between the reciprocating screw rod 10 and the moving seat 12.

[0030] Specifically, please refer to Figures 2 to 4 The end of the outer connecting pipe 3 is fixedly sleeved with a first flange 14, the end of the outer mounting cylinder 4 is fixedly sleeved with a second flange 15, and a plurality of first bolts 16 are screwed between the second flange 15 and the first flange 14.

[0031] In the embodiment, the outer mounting cylinder 4 is mounted on the outer connecting pipe 3 on the side of the denitration flue 1 through the cooperation of the first flange 14, the second flange 15 and the first bolts 16, so that the spray branch pipe 5 mounted on the outer mounting cylinder 4 is inserted into the inner cavity of the denitration flue 1.

[0032] Specifically, please refer to Figure 3 and Figure 4 The outer side of the outer mounting cylinder 4 is provided with a movable hole 17, the inner wall of the movable hole 17 is fixedly connected with a sealing rubber ring 18, the inner side surface of the sealing rubber ring 18 is in abutment with the outer side surface of the spray branch pipe 5, and the spray branch pipe 5 penetrates the inner cavity of the movable hole 17.

[0033] In the embodiment, the movable hole 17 facilitates the reciprocating sliding of the spray branch pipe 5 on the outer mounting cylinder 4, and the sealing rubber ring 18 ensures the sealing between the outer mounting cylinder 4 and the spray branch pipe 5.

[0034] Specifically, please refer to Figure 1 A plurality of liquid guide hoses 7 are fixedly installed with flow valves 21.

[0035] In the embodiment, the flow valves 21 control the flow of the reducing agent in the liquid guide hoses 7.

[0036] Specifically, please refer to Figure 4 The bottom surface of the moving seat 12 is in abutment with the top surface of the inner side of the L-shaped support 9.

[0037] In the embodiment, the L-shaped support 9 limits the moving seat 12 to reciprocate only along the axial direction of the reciprocating screw rod 10.

[0038] Working principle: in use, first, one end of the spray branch pipe 5 is inserted into the movable hole 17 and the clamping groove 19, so that the outer side of the spray branch pipe 5 and the inner side of the sealing rubber ring 18 are in close contact, and the spray branch pipe 5 is fixed on the movable seat 12 and the fixed cover 13 by the cooperation of the fixed cover 13, the movable seat 12 and the second bolt 20, then the end of the spray branch pipe 5 with the nozzle 6 is inserted into the inner cavity of the denitration flue 1 from the outer connecting pipe 3, and the outer mounting cylinder 4 is mounted on the outer connecting pipe 3 by the cooperation of the first flange 14, the second flange 15 and the first bolt 16, in addition, the end of the liquid guide hose 7 on the side of the reducing agent main pipe 2 is inserted into the plug 8 on the other end of the spray branch pipe 5, then the reducing agent is guided into the inner cavity of the spray branch pipe 5 through the reducing agent main pipe 2 and the liquid guide hose 7, so that the reducing agent is sprayed upward from the nozzle 6, so that the reducing agent and the flue gas flowing in the denitration flue 1 are fully mixed, so that the flue gas is denitrated by the reducing agent, finally, the servo motor 11 is started to drive the reciprocating screw rod 10 to rotate, the movable seat 12, the fixed cover 13, the spray branch pipe 5 and the nozzle 6 are synchronously reciprocated by the cooperation of the reciprocating screw rod 10 and the movable seat 12, so as to change the position of the nozzle 6 spraying the reducing agent, in addition, the reciprocating directions of two adjacent spray branch pipes 5 are opposite, and the nozzles 6 on both sides of the top surface of the spray branch pipe 5 are arranged obliquely upward, so as to ensure that the reducing agent and the flue gas are uniformly and fully mixed.

[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A flue gas denitration apparatus denitration agent injection device, comprising a denitration flue (1) and a reducing agent main pipe (2), characterized in that: The side of the denitration flue (1) is fixedly sleeved with a plurality of outer connecting pipes (3), the ends of the plurality of outer connecting pipes (3) are respectively provided with outer mounting barrels (4), the middle parts of the plurality of outer mounting barrels (4) are movably sleeved with injection branch pipes (5), one end of the plurality of injection branch pipes (5) extends to the inner cavity of the denitration flue (1), the two sides of the top of the one end of the injection branch pipe (5) are respectively fixedly provided with a plurality of nozzles (6), the other end of the injection branch pipe (5) is provided with a plug (8), the side of the reducing agent main pipe (2) is fixedly connected with a plurality of liquid guide hoses (7), the ends of the plurality of liquid guide hoses (7) are respectively sleeved outside the plug (8), the outside of the outer mounting barrel (4) is fixedly connected with an L-shaped support (9), the L-shaped support (9) and the outer mounting barrel (4) are rotatably connected with a reciprocating screw rod (10), the outside of the L-shaped support (9) is fixedly provided with a servo motor (11), the output shaft of the servo motor (11) and the end of the reciprocating screw rod (10) are connected, the outside of the reciprocating screw rod (10) is threadedly sleeved with a moving seat (12), the top end of the moving seat (12) is provided with a fixed cover (13), the fixed cover (13) and the moving seat (12) are sleeved outside the injection branch pipe (5).

2. The denitration agent injection device of a flue gas denitration apparatus according to claim 1, characterized by: The top surface of the moving seat (12) and the bottom of the fixed cover (13) are both provided with clamping grooves (19), the inner diameter of the clamping groove (19) is equal to the outer diameter of the injection branch pipe (5), the two sides of the fixed cover (13) and the moving seat (12) are respectively threadedly provided with second bolts (20).

3. The denitration agent injection device of a flue gas denitration apparatus according to claim 1, characterized by: The end of the outer connecting pipe (3) is fixedly sleeved with a first flange (14), the end of the outer mounting barrel (4) is fixedly sleeved with a second flange (15), a plurality of first bolts (16) are threadedly installed between the second flange (15) and the first flange (14).

4. The denitration agent injection device of a flue gas denitration apparatus according to claim 1, characterized by: The outside of the outer mounting barrel (4) is provided with a movable hole (17), the inner wall of the movable hole (17) is fixedly connected with a sealing rubber ring (18), the inner side of the sealing rubber ring (18) and the outer side of the injection branch pipe (5) are in abutment, the injection branch pipe (5) penetrates the inner cavity of the movable hole (17).

5. The denitration agent injection device of a flue gas denitration apparatus according to claim 1, characterized by: A flow valve (21) is fixedly installed on the plurality of liquid guide hoses (7).

6. The denitration agent injection device of a flue gas denitration apparatus according to claim 1, characterized by: The bottom surface of the moving seat (12) and the top surface of the inside of the L-shaped support (9) are in abutment.

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