Ammonia water spraying device and method

Abstract

The invention relates to the technical field of coking equipment, in particular to an ammonia water spraying device and method.The ammonia water spraying device comprises a bridge pipe, a spray head, a connecting pipe, a flange cover, an ammonia water inlet pipe, an ammonia water valve, a filter, a control valve and a pressure gauge, the connecting pipe extends into the bridge pipe and is fixed through the flange cover, and the spray head is arranged at the end, in the bridge pipe, of the connecting pipe; the spray nozzle has the beneficial effects that the spray nozzle is large in opening, not easy to block, simple in structure, convenient to use and high in practicability, atomized ammonia water is in full contact with raw coke oven gas, the raw coke oven gas cooling effect is good, the ammonia water utilization rate is high, and the service life of the spray nozzle is prolonged. The filter can be conveniently and timely cleaned, so that the normal production and operation of the coke oven are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of coking equipment, and in particular to an ammonia water spraying device and method. Background Art

[0002] The coke oven gas collection system includes a riser, a bridge pipe, a gas collection pipe and an ammonia spraying device. The riser on the top of the coke oven is connected to the gas collection pipe through a bridge pipe, and the gas generated by the coke oven is cooled and introduced into the gas collection pipe. Low-pressure ammonia is sprayed in the bridge pipe to cool the raw gas from the riser, cooling its temperature from 600-650℃ to below 100℃, and at the same time condensing a portion of the tar and ammonia.

[0003] The position of the ammonia nozzle of the traditional ammonia injection device cannot be controlled, the ammonia nozzle is not effective, the ammonia spray cannot be atomized and sprayed evenly, the ammonia and the raw gas in the coke oven gas collection system cannot fully contact, and the cooling effect cannot be achieved; the blockage detection of the spraying device is not timely, affecting the coke oven production.

[0004] In order to ensure the long-term stable operation of coke oven production, it is necessary to develop an ammonia spraying device. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the present invention provides an ammonia water spraying device and method, which adopts an atomizing nozzle to extend into the bridge pipe through a connecting pipe. The atomized ammonia water sprayed by all the nozzle holes of the nozzle will cover the entire internal space of the bridge pipe. The atomized ammonia water is in full contact with the raw coal gas, and the cooling effect is good. A pressure gauge is provided on the connecting pipe to measure the ammonia water pressure in the connecting pipe, so as to promptly confirm the blockage of the spraying device and timely inspect and replace the filter without affecting the coke oven production.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An ammonia water spraying device includes a bridge pipe, a nozzle, a connecting pipe, a flange cover, an ammonia water inlet pipe, an ammonia water valve, a filter, a control valve and a pressure gauge. The connecting pipe extends into the bridge pipe and is fixed by the flange cover. The nozzle is provided at the end of the connecting pipe inside the bridge pipe. The connecting pipe is provided with a pressure gauge, a control valve, a filter and an ammonia water valve in sequence outside the bridge pipe and then connected to the ammonia water inlet pipe. The nozzle includes a shell and an inner core. The end of the shell is a frustum structure. A liquid distribution chamber is provided inside the shell. A cylindrical spray hole is provided at the center of the frustum end face. A plurality of cylindrical spray holes are evenly distributed around the circumference of the frustum cone. A spray chamber is provided between the liquid distribution chamber and the cylindrical spray hole. An inner core is provided in the spray chamber. The shell and the inner core are threadedly connected.

[0008] Furthermore, the lower portion of the injection chamber is a cylindrical cavity, the upper portion is a conical cavity, and the inner wall of the bottom of the cylindrical cavity is provided with an internal thread.

[0009] Furthermore, the inner core is a cylindrical half shell, the upper end is a complete circular end face, the lower end is a stepped cylindrical wall, a through hole is set in the center of the circular end face, and an external thread is set at the bottom of the stepped cylindrical wall at the lower end.

[0010] Furthermore, a plurality of tangential channels are provided on the stepped cylindrical wall.

[0011] Furthermore, the bridge pipe is provided with a flange, and the flange is connected to the flange cover.

[0012] Furthermore, the filter is a wire mesh filter or other liquid filter.

[0013] Furthermore, the pressure gauge is a liquid pressure gauge.

[0014] Furthermore, the pressure gauge, control valve, filter and ammonia valve are threadedly connected to the connecting pipe.

[0015] Furthermore, the spraying method of the ammonia water spraying device includes the following steps:

[0016] S1. Ammonia water from the ammonia water inlet pipe passes through the opened ammonia water valve, filter, control valve, and then enters the nozzle through the connecting pipe. The ammonia water enters the liquid distribution chamber of the nozzle and is distributed to the injection chambers at the center and circumference in the liquid distribution chamber;

[0017] S2. The center of the inner core is a straight channel for ammonia, which directly enters the upper conical cavity of the shell. A tangential channel is set on the stepped cylindrical wall at the lower end of the inner core. The ammonia rotates along the tangential channel in the cylindrical cavity and fully mixes and collides with the ammonia in the central straight channel in the conical cavity to form atomization. It is sprayed along the cylindrical spray hole at the top of the spray cavity to form uniform atomized ammonia outside the nozzle;

[0018] S3. All cylindrical nozzle holes of the nozzle will cover the entire internal space of the bridge pipe with atomized ammonia water, and the atomized ammonia water will fully contact with the raw gas;

[0019] S4. During operation, use a pressure gauge to measure the pressure in the pipe. When the pressure gauge shows a decrease in pressure, the filter is clogged. Close the ammonia valve and the control valve, and clean the filter. This is safe and reliable.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The ammonia water in the nozzle enters the injection cavity through a central straight channel and a tangential channel. The ammonia water rotates in the injection cavity to form atomized ammonia water. The nozzle opening is large and not easy to be blocked. The nozzle structure is simple, easy to use, the device is practical and has a long service life.

[0022] 2) Multiple spray holes are set on the end face of the nozzle, the nozzle covers a large area, the spraying is uniform, the atomized ammonia water is fully in contact with the raw gas, the raw gas cooling effect is good, the ammonia water utilization rate is high, and the use of ammonia water is saved.

[0023] 3) The connecting pipe and pressure gauge, control valve, filter and ammonia valve are threadedly connected, with simple structure, easy installation, and convenient and quick maintenance and replacement.

[0024] 4) A pressure gauge is used to measure the pressure inside the pipe, and the blockage of the device can be detected at any time, which facilitates timely cleaning of the filter, makes maintenance convenient and timely, and ensures normal production and operation of the coke oven.

[0025] 5) Set up a control valve and an ammonia valve. The ammonia valve controls the amount of ammonia entering. The control valve is closed when cleaning the filter to prevent the leakage of raw gas in the bridge pipe, prevent the leakage of raw gas from affecting production safety, and improve the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an ammonia water spraying device described in the present invention.

[0027] Figure 2 It is a side view of the structure of an ammonia water spraying device described in the present invention.

[0028] Figure 3 It is a cross-sectional view of the nozzle structure of the present invention.

[0029] Figure 4 It is a schematic diagram of the end face structure of the nozzle of the present invention.

[0030] Figure 5 It is a cross-sectional view of the shell structure described in the present invention.

[0031] Figure 6 It is a cross-sectional view of the inner core structure of the present invention.

[0032] Figure 7 It is a top view of the inner core structure described in the present invention.

[0033] In the figure: 1. Bridge pipe; 2. Nozzle; 3. Connecting pipe; 4. Flange cover; 5. Ammonia inlet pipe; 6. Ammonia valve; 7. Filter; 8. Control valve; 9. Pressure gauge; 10. Flange; 21. Shell; 22. Inner core; 23. Liquid distribution chamber; 24. Cylindrical spray hole; 25. Injection chamber; 26. Tangential channel; 221. Through hole; 222. External thread; 251. Cylindrical cavity; 252. Conical cavity; 253. Internal thread. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0035] like Figure 1-Figure 7 As shown, the working principle of an ammonia water spraying device is as follows: the connecting pipe 3 extends into the bridge pipe 1, and the connecting pipe 3 is provided with a pressure gauge 9, a control valve 8, a filter 7 and an ammonia water valve 6 outside the bridge pipe 1 to control the ammonia water to enter the nozzle 2 at the end. The control valve 8 prevents the raw gas from leaking when cleaning the filter 7. The ammonia water valve 6 adjusts the amount of ammonia water entering. The nozzle 2 adopts a central cylindrical spray hole 24 and a plurality of cylindrical spray holes 24 around it to spray atomized ammonia water into the bridge pipe 1. The atomized ammonia water sprayed by the nozzle 2 has a large coverage area and is sprayed evenly. The atomized ammonia water is in full contact with the raw gas, and the cooling effect is good.

[0036] like Figure 1-Figure 7 As shown, an ammonia water spraying device includes a bridge pipe 1, a nozzle 2, a connecting pipe 3, a flange cover 4, an ammonia water inlet pipe 5, an ammonia water valve 6, a filter 7, a control valve 8 and a pressure gauge 9. The connecting pipe 3 extends into the bridge pipe 1 and is fixed by the flange cover 4. The connecting pipe 3 is welded to the flange cover 4 and fixed. The nozzle 2 is provided at the end of the connecting pipe 3. The nozzle 2 at the end of the connecting pipe 3 extends into the center of the bridge pipe 1. The connecting pipe 3 is connected to the ammonia water inlet pipe 5 after the pressure gauge 9, the control valve 8, the filter 7 and the ammonia water valve 6 are sequentially provided outside the bridge pipe 1. The pressure gauge detects the ammonia water pressure in the connecting pipe. When the pressure gauge 9 shows that the pressure is reduced, the filter 7 may be blocked, the ammonia water valve 6 is closed, and the control valve 8 is closed. The filter 7 is cleaned and the ammonia water valve 6 is closed. To prevent ammonia leakage, the control valve 8 is closed to prevent the raw gas in the bridge pipe 1 from leaking. The device has good sealing performance, which improves the safety of the surrounding area. The device is safe and reliable. The nozzle 2 includes a shell 21 and an inner core 22. The end of the shell 21 is a frustum structure. A liquid distribution chamber 23 is arranged inside the shell 21. A cylindrical spray hole 24 is arranged at the center of the frustum end face. Six cylindrical spray holes 24 are evenly distributed on the circumference of the frustum cone. The cylindrical spray holes 24 are wrapped around the end of the nozzle 2. The atomized ammonia sprayed from the cylindrical spray holes 24 covers the entire bridge pipe 1. The atomized ammonia is in full contact with the raw gas. A spray chamber 25 is arranged between the liquid distribution chamber 23 and the cylindrical spray hole 24. An inner core 22 is arranged in the spray chamber 25. The shell 21 and the inner core 22 are threadedly connected.

[0037] Furthermore, the lower portion of the injection chamber 25 is a cylindrical cavity 251 , and the upper portion is a conical cavity 252 . An internal thread 253 is provided on the inner wall of the bottom of the cylindrical cavity 251 .

[0038] Furthermore, the inner core 22 is a cylindrical half shell, with a complete circular end face at the upper end and a stepped cylindrical wall at the lower end. A through hole 221 is provided at the center of the circular end face, and an external thread 222 is provided at the bottom of the stepped cylindrical wall at the lower end.

[0039] Furthermore, a plurality of tangential channels 26 are provided on the stepped cylindrical wall.

[0040] Furthermore, the bridge pipe 1 is provided with a flange 10, which is connected to the flange cover 4, and the flange cover 4 is fixedly bolted to the flange 10, and a connecting pipe 3 is welded on the flange cover 4, so that the nozzle 2 of the connecting pipe 3 is fixed in the bridge pipe 1, and the nozzle 2 faces the flow direction of the raw gas.

[0041] Furthermore, the filter 7 is a wire mesh filter or other liquid filter.

[0042] Furthermore, the pressure gauge 9 is a liquid pressure gauge.

[0043] Furthermore, the pressure gauge 9 , the control valve 8 , the filter 7 and the ammonia valve 6 are threadedly connected to the connecting pipe 3 .

[0044] Furthermore, the spraying method of the ammonia water spraying device includes the following steps:

[0045] S1, ammonia water from ammonia water inlet pipe 5 passes through opened ammonia water valve 6, filter 7, control valve 8, and then enters nozzle 2 through connecting pipe 3. Ammonia water enters liquid distribution chamber 23 of nozzle 2, and is distributed to injection chambers 25 at the center and circumference in liquid distribution chamber 23;

[0046] S2, the center of the inner core 22 is a straight channel for ammonia, which directly enters the conical cavity 252 at the upper part of the shell 21. A tangential channel 26 is provided on the stepped cylindrical wall at the lower end of the inner core 22. The ammonia rotates along the tangential channel 26 in the cylindrical cavity 251, and is fully mixed and collided with the ammonia in the central straight channel in the conical cavity 252 to form atomization, and is sprayed along the cylindrical spray hole 24 at the top of the spray chamber 25 to form uniform atomized ammonia outside the nozzle 2;

[0047] S3, all the cylindrical spray holes 24 of the nozzle 2 cover the entire internal space of the bridge pipe 1 with atomized ammonia water, and the atomized ammonia water is in full contact with the raw gas;

[0048] S4. During operation, use the pressure gauge 9 to measure the pressure in the pipe. When the pressure gauge 9 shows a decrease in pressure, the filter 7 is blocked. Close the ammonia valve 6 and the control valve 8, and clean the filter 7. This is safe and reliable.

[0049] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An ammonia water spraying device, comprising a bridge pipe (1), a nozzle (2), a connecting pipe (3), a flange cover (4), an ammonia water inlet pipe (5), an ammonia water valve (6), a filter (7), a control valve (8) and a pressure gauge (9), characterized in that: The connecting pipe (3) extends into the bridge pipe (1) and is fixed by a flange cover (4). The connecting pipe (3) is provided with a nozzle (2) at the end of the bridge pipe (1). The connecting pipe (3) is provided with a pressure gauge (9), a control valve (8), a filter (7) and an ammonia valve (6) in sequence outside the bridge pipe (1) and then connected to the ammonia inlet pipe (5). The nozzle (2) includes a shell (21) and an inner core (22). The end of the shell (21) is a truncated cone structure. A liquid distribution chamber (23) is provided inside the shell (21). A cylindrical spray hole (24) is provided at the center of the end face of the truncated cone. A plurality of cylindrical spray holes (24) are evenly distributed on the circumference of the cone surface. A spray chamber (25) is provided between the liquid distribution chamber (23) and the cylindrical spray hole (24). An inner core (22) is provided in the spray chamber (25). The shell (21) and the inner core (22) are connected by threaded fitting.

2. An ammonia water spraying device according to claim 1, characterized in that: The lower part of the injection cavity (25) is a cylindrical cavity (251), and the upper part is a conical cavity (252). An internal thread (253) is provided on the inner wall of the bottom of the cylindrical cavity (251).

3. An ammonia water spraying device according to claim 1, characterized in that: The inner core (22) is a cylindrical half shell, the upper end of which is a complete circular end face and the lower end is a stepped cylindrical wall. A through hole (221) is provided at the center of the circular end face, and an external thread (222) is provided at the bottom of the stepped cylindrical wall.

4. An ammonia water spraying device according to claim 3, characterized in that: A plurality of tangential channels (26) are arranged on the stepped cylindrical wall.

5. The ammonia water spraying device according to claim 1, characterized in that: The bridge pipe (1) is provided with a flange (10), and the flange (10) is connected to the flange cover (4).

6. The ammonia water spraying device according to claim 1, characterized in that: The filter (7) is a wire mesh filter or a liquid filter.

7. The ammonia water spraying device according to claim 1, characterized in that: The pressure gauge (9) is a liquid pressure gauge.

8. The ammonia water spraying device according to claim 1, characterized in that: The pressure gauge (9), control valve (8), filter (7) and ammonia valve (6) are threadedly connected to the connecting pipe (3).

9. A spraying method of the ammonia water spraying device according to claim 1, characterized in that: The spraying method of the ammonia water spraying device comprises the following steps: S1, ammonia water from the ammonia water inlet pipe (5) passes through the opened ammonia water valve (6), the filter (7), the control valve (8), and then enters the nozzle (2) through the connecting pipe (3). The ammonia water enters the liquid distribution chamber (23) of the nozzle (2), and is distributed to the injection chambers (25) at the center and circumferential positions in the liquid distribution chamber (23); S2, the center of the inner core (22) is a straight channel for ammonia water, which directly enters the conical cavity (252) at the upper part of the shell (21), and a tangential channel (26) is provided on the stepped cylindrical wall at the lower end of the inner core (22). The ammonia water rotates along the tangential channel (26) in the cylindrical cavity (251), and is fully mixed and collided with the ammonia water in the central straight channel in the conical cavity (252) to form atomization, and is sprayed along the cylindrical spray hole (24) at the top of the spray cavity (25), forming uniform atomized ammonia water outside the nozzle (2); S3. All cylindrical spray holes (24) of the nozzle (2) cover the entire interior space of the bridge pipe (1) with atomized ammonia water, so that the atomized ammonia water is in full contact with the raw gas; S4. During operation, the pressure in the pipe is measured using a pressure gauge (9). When the pressure gauge (9) shows a decrease in pressure, the filter (7) is blocked. The ammonia valve (6) and the control valve (8) are closed, and the filter (7) is cleaned. This is safe and reliable.

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