Efficient denitration reducing agent spraying device

Abstract

An efficient denitration reducing agent spraying device comprises a spraying pipe assembly and is characterized in that the spraying pipe assembly comprises an inner pipe and an outer pipe which are nested with each other; a spray pipe head is connected between one end of the inner pipe and one end of the outer pipe, and a plurality of liquid spray holes are evenly distributed in the circumference of the spray pipe head and communicated with an inner cavity of the outer pipe. The front end of a spray pipe head of the spray pipe assembly is in threaded connection with a spray nozzle seat, a stepped center hole and liquid guide holes which are uniformly distributed on the circumference are formed in the spray nozzle seat, the center hole is communicated with an inner pipe of the spray pipe assembly, and the liquid guide holes are obliquely arranged and are communicated with the liquid spray holes; an atomizing head is connected to the front end of the nozzle seat, the small end of the front end of the nozzle seat is inserted into a center hole of the atomizing head in a clearance fit mode, the liquid guide hole is communicated with the center hole of the atomizing head, and the front end of the atomizing head is in a semi-spherical shape and is provided with a flat spraying opening. The device is good in atomization effect, the reducing agent liquid can make more sufficient contact with a target, the spraying uniformity and coverage degree are improved, and therefore the spraying quality and the denitration efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to an injection device, in particular to a high-efficiency denitration reducing agent injection device. Background Art

[0002] With increasingly stringent environmental protection requirements, flue gas denitrification technology has been widely used. In the process of flue gas denitrification, the denitrification reductant injection device is a key equipment, and its performance directly affects the denitrification effect. Existing denitrification reductant injection devices are mostly single-fluid denitrification spray guns. Single-fluid spray guns mainly rely on pump pressure to send the reductant liquid into the nozzle, and rotate it at high speed in the nozzle rotating chamber, and finally spray it through the small holes of the nozzle, so that the reductant liquid is atomized into fine droplets. Its atomization characteristics mainly depend on the liquid inlet pressure and the aperture of the nozzle. There are generally problems such as poor atomization effect and low denitrification efficiency, which is difficult to meet modern environmental protection requirements. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-efficiency denitration reducing agent injection device with good atomization effect and high denitration efficiency.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A high-efficiency denitration reducing agent injection device comprises a nozzle assembly, wherein the nozzle assembly comprises an inner tube and an outer tube nested with each other, and is used to respectively access compressed air through the inner tube and access reducing agent liquid through the outer tube; a nozzle head is connected between one end of the inner tube and the outer tube, and a plurality of liquid injection holes are evenly distributed on the nozzle head and are connected to the inner cavity of the outer tube;

[0006] A nozzle seat is connected to the front end of the nozzle head of the nozzle assembly through a thread, and a stepped central hole and circumferentially evenly distributed liquid guide holes are provided in the nozzle seat, the central hole is connected to the inner tube of the nozzle assembly, and the liquid guide holes are arranged obliquely and connected to the liquid spray hole;

[0007] An atomizing head is connected to the front end of the nozzle seat. The small head end of the front end of the nozzle seat is inserted into the central hole of the atomizing head through clearance fit. The liquid guide hole is connected to the central hole of the atomizing head. The front end of the atomizing head is semi-spherical and has a flat injection port.

[0008] As a further preference, a sealing gasket is provided between the nozzle head and the nozzle seat, through holes are evenly distributed on the circumference of the sealing gasket, and annular grooves are respectively provided at the opposite ends of the nozzle head and the nozzle seat, and the liquid guide hole and the liquid spray hole are connected through the annular grooves on the nozzle head and the nozzle seat and the through holes on the sealing gasket to facilitate installation and sealing.

[0009] As a further preference, an outer pipe joint is connected to the other end of the outer pipe through a tee to facilitate access to the reducing agent liquid.

[0010] As a further preference, the other end of the inner tube passes through a tee and is connected to a ferrule elbow to facilitate access to compressed air; a ferrule joint is threadedly connected to the other end of the tee, and a ferrule joint sealing sleeve is provided on the inner tube to seal the other end of the tee.

[0011] As a further preference, a quick connector is sleeved on the outer tube, one end of which is threadedly connected to a ferrule-type pipe joint and clamped on the outer tube through the ferrule-type pipe joint, so as to adjust the length of the atomizer head extending into the flue.

[0012] As a further preference, a nut sleeve is threadedly connected to the front end of the nozzle seat, and the nut sleeve is sleeved and clamped on the shoulder at the rear end of the outer edge of the atomizing head to facilitate fixing the atomizing head.

[0013] As a further preference, a protective sleeve is sleeved on the outer tube, a positioning sleeve is fixedly connected to one end of the protective sleeve, and the positioning sleeve is fixed to the outer tube by a top screw to protect the nozzle seat and the atomizing head.

[0014] As a further preference, a fixing sleeve is further provided, and a quick connector sleeve is connected to one end of the fixing sleeve for clamping the quick connector to fix the device.

[0015] The beneficial effects of the utility model are:

[0016] 1. The device is connected to compressed air and reducing agent liquid through the inner tube and outer tube of the nozzle assembly respectively. The compressed air and reducing agent liquid can be introduced into the atomizing head for mixing through the central hole in the nozzle seat and the liquid guide holes evenly distributed on the circumference. The reducing agent liquid is atomized and sprayed out under the action of high-speed airflow by utilizing the common pressure of the gas and the reducing agent liquid. The atomized particles are small and uniform, and the atomization effect is good, which can enable the reducing agent liquid to contact the target more fully, improve the uniformity and coverage of the spraying, thereby improving the spraying quality and denitrification efficiency.

[0017] 2. The device can achieve fine atomization under lower air pressure conditions, significantly reducing energy consumption; it is easy to disassemble and assemble, and is easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the connection between the spray pipe assembly, the nozzle seat and the atomizing head of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the fixed sleeve part of the utility model.

[0021] In the figure: nozzle assembly 1, top screw 2, atomizing head 3, nut sleeve 4, nozzle seat 5, sealing gasket 6, protective sleeve 7, positioning sleeve 8, ferrule elbow 9, quick connector 10, reducer thread head 11, ferrule pipe joint 12, outer pipe joint 13, tee 14, ferrule joint 15, quick connector jacket 16, fixing sleeve 17. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 2 As shown, the utility model relates to a high-efficiency denitration reducing agent injection device, comprising a nozzle assembly 1, which includes an inner tube 101 and an outer tube 102 that are concentrically nested with each other, and are used to respectively connect compressed air through the inner tube 101 and connect reducing agent liquid through the outer tube 102; a nozzle head 103 is welded between one end of the inner tube 101 and the outer tube 102, and a plurality of liquid injection holes 104 are evenly distributed on the circumference of the nozzle head 103 and are connected to the inner cavity of the outer tube 102; the other end of the inner tube 101 passes through the outer tube 102.

[0023] A nozzle seat 5 is connected to the front end of the nozzle head 103 of the nozzle assembly 1 through a thread, and a stepped central hole and a plurality of liquid guide holes 501 evenly distributed around the circumference are provided in the nozzle seat 5. The central hole is connected to the inner tube 101 of the nozzle assembly 1, and the liquid guide holes 501 are arranged obliquely and connected to the liquid injection hole 104. In this embodiment, six liquid guide holes and six liquid injection holes are used as an example.

[0024] A sealing gasket 6 is clamped between the nozzle head 103 and the nozzle seat 5, and a plurality of through holes are evenly distributed on the circumference of the sealing gasket 6. Annular grooves are respectively provided at the opposite ends of the nozzle head 103 and the nozzle seat 5. The liquid guide hole 501 and the liquid injection hole are connected through the annular grooves on the nozzle head 103 and the nozzle seat 5 and the through holes on the sealing gasket 6 to facilitate installation and sealing.

[0025] The front end of the nozzle seat 5 is connected with the atomizing head 3 and is connected with the nut sleeve 4 through a thread. The nut sleeve 4 is sleeved and clamped on the shoulder of the rear end of the outer edge of the atomizing head 3 to fix the atomizing head 3. The small head end of the front end of the nozzle seat 5 is inserted into the central hole of the atomizing head 3 through a clearance fit. The liquid guide hole 501 is connected with the central hole of the atomizing head 3 through the annular gap between the front end of the nozzle seat 5 and the central hole of the atomizing head 3. The front end of the atomizing head 3 is semi-spherical and is provided with a spray flat mouth 301.

[0026] The other end of the outer tube 102 is connected to an outer tube joint 13 through a tee 14 to facilitate the access to the reducing agent liquid. The other end of the inner tube 101 passes through the tee 14 and is connected to a ferrule elbow 9 to facilitate the access to compressed air; the other end of the tee 14 is connected to a ferrule joint 15 through a reducer and a thread, and the ferrule joint 15 sealing sleeve is arranged on the inner tube 101 to block the other end of the tee 14.

[0027] A protective sleeve 7 is sleeved on one end of the outer tube 102 corresponding to the nozzle head 103, and a positioning sleeve 8 is welded on the end of the protective sleeve 7 away from the nozzle head 103. The positioning sleeve 8 is fixed to the outer tube by a top screw 2 to protect the nozzle seat 5 and the atomizing head 3.

[0028] A quick connector 10 is sleeved in the middle of the outer tube 102, and one end of the quick connector 10 is clamped on the outer tube 102 through a reducer 11 and a threaded ferrule pipe connector 12, so as to adjust the length of the atomizer head 3 extending into the flue.

[0029] like Figure 3 As shown, the device is further provided with a fixing sleeve 17 for fixing on the side wall of the flue; a quick connector sleeve 16 is threadedly connected to one end of the fixing sleeve 17 for clamping the quick connector to fix the device.

[0030] When in use, one end of the atomizing head 3 of the device is inserted into the flue through the fixing sleeve, and fixed with the quick connector jacket. The reducing agent liquid is connected to the pipeline through the outer pipe joint 13, and the compressed air is connected to the air pipe through the ferrule elbow 9; the reducing agent liquid enters the outer pipe and enters the atomizing head 3 through the spray hole on the nozzle head 103, the through hole on the sealing gasket 6 and the liquid guide hole 501 in the nozzle seat 5 in turn; after the compressed air enters the inner pipe 101, it enters the center hole in the atomizing head 3 through the nozzle head 103 and the center hole in the nozzle seat 5 in turn, and mixes with the reducing agent liquid entering the atomizing head 3, so that the reducing agent liquid is sprayed out through the injection flat mouth 301 under the action of the high-speed airflow, and the atomization effect is good, which can make the reducing agent liquid contact with the target more fully, improve the uniformity and coverage of the spraying, and thus improve the spraying quality.

[0031] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A high-efficiency denitration reducing agent injection device, comprising a nozzle assembly, characterized in that: The nozzle assembly comprises an inner tube and an outer tube nested with each other, and is used to respectively receive compressed air through the inner tube and receive reducing agent liquid through the outer tube; a nozzle head is connected between one end of the inner tube and the outer tube, and a plurality of liquid spraying holes are evenly distributed on the nozzle head and communicated with the inner cavity of the outer tube; A nozzle seat is connected to the front end of the nozzle head of the nozzle assembly through a thread, and a stepped central hole and circumferentially evenly distributed liquid guide holes are provided in the nozzle seat, the central hole is connected to the inner tube of the nozzle assembly, and the liquid guide holes are arranged obliquely and connected to the liquid spray hole; An atomizing head is connected to the front end of the nozzle seat. The small head end of the front end of the nozzle seat is inserted into the central hole of the atomizing head through clearance fit. The liquid guide hole is connected to the central hole of the atomizing head. The front end of the atomizing head is semi-spherical and has a flat injection port.

2. The high-efficiency denitration reducing agent injection device according to claim 1 is characterized in that: A sealing gasket is provided between the nozzle head and the nozzle seat, and through holes are evenly distributed on the circumference of the sealing gasket. Annular grooves are respectively provided at the opposite ends of the nozzle head and the nozzle seat. The liquid guide hole and the liquid spray hole are connected through the annular grooves on the nozzle head and the nozzle seat and the through holes on the sealing gasket to facilitate installation and sealing.

3. The high-efficiency denitration reducing agent injection device according to claim 1 is characterized in that: The other end of the outer tube is connected with an outer tube joint through a tee to facilitate the access of the reducing agent liquid.

4. The high-efficiency denitration reducing agent injection device according to claim 3 is characterized in that: The other end of the inner tube passes through the tee and is connected with a ferrule elbow to facilitate the access to compressed air; a ferrule joint is threadedly connected to the other end of the tee, and a ferrule joint sealing sleeve is arranged on the inner tube to seal the other end of the tee.

5. A high-efficiency denitration reducing agent injection device according to any one of claims 1 to 4, characterized in that: A quick connector is sleeved on the outer tube, one end of which is connected to a ferrule-type pipe connector through a thread and clamped on the outer tube through the ferrule-type pipe connector, so as to adjust the length of the atomizing head extending into the flue.

6. The high-efficiency denitration reducing agent injection device according to claim 1 is characterized in that: A nut sleeve is connected to the front end of the nozzle seat through a thread, and the nut sleeve is sleeved and clamped on the shoulder at the rear end of the outer edge of the atomizing head to fix the atomizing head.

7. The high-efficiency denitration reducing agent injection device according to claim 5 is characterized in that: A protective sleeve is sleeved on the outer tube, a positioning sleeve is fixedly connected to one end of the protective sleeve, and the positioning sleeve is fixed on the outer tube through a top screw to protect the nozzle seat and the atomizing head.

8. A high-efficiency denitration reducing agent injection device according to claim 1 or 7, characterized in that: A fixing sleeve is also provided, and a quick connector sleeve is connected to one end of the fixing sleeve for clamping the quick connector to fix the device.

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