Phosphoric acid wet purification equipment

Abstract

The utility model discloses wet purification equipment for phosphoric acid. The wet purification equipment comprises a spray tower, a gas phase outlet, a liquid phase outlet, a flue gas pipeline, a spray pipe, a liquid supply pipe and an anti-blocking spray device, the anti-blocking spraying device is arranged on the surface of the spraying pipe, when the spraying pipe is in an idle state, the liquid supply pipe stops supplying liquid to the spraying pipe, the hydraulic pressure in the sleeve is reduced, at the moment, the elastic acting force of the reset spring exceeds the hydraulic pressure in the sleeve, and the reset spring pushes the transmission rod to move, reset and retract upwards to the inner side of the sleeve; the nozzle is sealed by the sealing cover, impurities are prevented from entering the nozzle, the failure rate of the nozzle is reduced, the blockage clearing needle is arranged at the top of the sealing cover, and the sealing cover can drive the blockage clearing needle to move on the inner side of the nozzle when moving, so that a channel on the inner side of the nozzle is dredged, and workers can be helped to clear blockage faults.

Description

Technical Field

[0001] The utility model relates to the relevant field of wet purification equipment, in particular to phosphoric acid wet purification equipment. Background Art

[0002] The spray tower exists as a treatment equipment for environmental waste gas treatment. According to the working principle, it is divided into circulating water spray tower, alkali spray tower and acid spray tower. It can deeply purify and treat the tail gas generated in the phosphoric acid chemical production process.

[0003] Existing patent application number: CN201822028279.0 A high-temperature sulfuric acid spray tower liquid level measuring device and a high-temperature sulfuric acid spray tower, including a liquid level gauge main conduit, on which a liquid level gauge float capable of measuring water level is movably provided, characterized in that a float balancing mechanism is provided outside the liquid level gauge main conduit, which can reduce the inaccurate liquid level measurement caused by the violent up and down fluctuations of the liquid level gauge float when measuring the water level in the spray tower. The float balancing mechanism reduces the violent up and down fluctuations of the liquid level gauge float, and then the liquid level is known by observing the position of the liquid level gauge float on the liquid level gauge main conduit, thereby meeting people's usage needs, having a simple structure and strong practicality.

[0004] The above patent records a spray tower in which a spray pipe is arranged. The spray pipe sprays chemicals to the passing flue gas through a nozzle arranged thereon, thereby purifying the flue gas. However, in actual application, the spray pipe is exposed to the flue gas for a long time, and some impurities carried by the flue gas can easily cause clogging of the nozzle. Over time, the nozzle will find it difficult to spray normally. The spray pipe is arranged in the spray tower, and maintenance and troubleshooting work is also difficult to carry out. The functional structure of the spray pipe can be further improved to reduce its failure rate. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a phosphoric acid wet purification device.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a phosphoric acid wet purification equipment, including a spray tower, a gas phase outlet, a liquid phase outlet, a flue gas pipeline, a spray pipe, a liquid supply pipe and an anti-blocking spray device, the top of the spray tower is provided with a gas phase outlet, the bottom of the spray tower is provided with a liquid phase outlet, the lower right end of the spray tower is connected to the flue gas pipeline, the spray pipe is horizontally installed at the upper inner end of the spray tower, and the left end of the spray pipe extends out of the inner side of the spray tower and is connected to the liquid supply pipe, the surface of the spray pipe is provided with an anti-blocking spray device, and the anti-blocking spray device includes a spray head, a nozzle, a sleeve, a transmission rod, a piston, a reset spring, A connecting frame and a sealing cover, a row of spray heads are installed at the bottom of the spray pipe, a nozzle is opened at the center of the bottom end surface of the spray head, a sleeve is arranged at the bottom of the spray pipe, the sleeve is communicated with the inner side of the spray pipe, and the sleeve is parallel to the spray head, a transmission rod is slidingly arranged at the opening at the bottom end of the sleeve, a piston is installed at the top of the transmission rod, and the piston slides in a sealed manner against the inner wall of the sleeve, a return spring is sleeved on the outside of the transmission rod, the top of the return spring is in conflict with the piston, and the bottom of the return spring is in conflict with the sleeve, the bottom end of the transmission rod extends out of the sleeve and is connected and fixed to the connecting frame, a row of sealing covers are arranged on the surface of the connecting frame, and the sealing covers are located directly below the nozzles.

[0007] Preferably, the nozzle is of concave design, and the cross-sectional area of ​​the cover is larger than the cross-sectional area of ​​the nozzle.

[0008] Preferably, the number of the caps is consistent with the number of the nozzles, and the position distribution of the caps is consistent with that of the nozzles.

[0009] Preferably, the nozzle is a conical nozzle.

[0010] Preferably, the horizontal width of the connecting frame does not exceed 10 mm.

[0011] Preferably, a clearing needle is provided on the top of the cover, the size of the clearing needle matches that of the nozzle, and the clearing needle and the nozzle are in the same vertical direction.

[0012] Beneficial effects of the utility model:

[0013] The utility model arranges an anti-blocking spray device on the surface of the spray pipe. When the spray pipe is in an idle state, the liquid supply pipe stops supplying liquid to the spray pipe, so that the hydraulic pressure inside the sleeve is reduced. At this time, the elastic force of the reset spring will exceed the hydraulic pressure inside the sleeve, so that the reset spring pushes the transmission rod to move and reset, and shrink upward to the inside of the sleeve until the sealing cover is tightly fitted to the nozzle surface, so that the sealing cover closes the nozzle, prevents impurities from entering, and reduces the failure rate of the nozzle.

[0014] The utility model arranges a clearing needle on the top of the sealing cap, which can drive the clearing needle to move inside the nozzle when the sealing cap moves, thereby clearing the inner channel thereof, and can help staff to clear the blockage fault. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a front view structural schematic diagram of the spray pipe in the utility model;

[0017] Figure 3 This utility model Figure 2 Schematic diagram of idle state;

[0018] Figure 4 It is a schematic diagram of the structure of the nozzle in the utility model when viewed from above;

[0019] Figure 5 It is a front view cross-sectional structural schematic diagram of the sleeve in the utility model.

[0020] Among them: spray tower-1, gas phase outlet-2, liquid phase outlet-3, flue gas duct-4, spray pipe-5, liquid supply pipe-6, anti-blocking spray device-7, nozzle-71, nozzle-72, sleeve-73, transmission rod-74, piston-75, return spring-76, connecting frame-77, sealing cover-78, and clearing needle-79. DETAILED DESCRIPTION

[0021] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0022] See also Figure 1 The utility model provides a phosphoric acid wet purification device, comprising a spray tower 1, a gas phase outlet 2, a liquid phase outlet 3, a flue gas pipeline 4, a spray pipe 5, a liquid supply pipe 6 and an anti-blocking spray device 7. The top of the spray tower 1 is provided with a gas phase outlet 2, the bottom of the spray tower 1 is provided with a liquid phase outlet 3, the lower right end of the spray tower 1 is connected with the flue gas pipeline 4, the spray pipe 5 is horizontally installed at the upper inner end of the spray tower 1, and the left end of the spray pipe 5 extends out of the inner side of the spray tower 1 and is connected to the liquid supply pipe 6, and the surface of the spray pipe 5 is provided with an anti-blocking spray device 7.

[0023] See also Figure 2-5The anti-blocking spray device 7 in the utility model includes a spray head 71, a nozzle 72, a sleeve 73, a transmission rod 74, a piston 75, a return spring 76, a connecting frame 77 and a cover 78. A row of spray heads 71 ​​are installed at the bottom of the spray pipe 5. The center of the bottom end surface of the spray head 71 is provided with a nozzle 72. A sleeve 73 is provided at the bottom of the spray pipe 5. The sleeve 73 is connected to the inner side of the spray pipe 5, and the sleeve 73 is parallel to the spray head 71. The bottom opening of the sleeve 73 is slidably provided with a transmission rod 74. The transmission rod A piston 75 is installed at the top of 74, and the piston 75 slides in a sealed manner against the inner wall of the sleeve 73. A return spring 76 is sleeved on the outside of the transmission rod 74. The top of the return spring 76 contacts the piston 75, and the bottom of the return spring 76 contacts the sleeve 73. The transmission rod 74 is controlled by the return spring 76 to return to the original position. The bottom end of the transmission rod 74 extends out of the sleeve 73 and is fixedly connected to the connecting frame 77. A row of sealing covers 78 are provided on the surface of the connecting frame 77, and the sealing covers 78 are located directly below the nozzle 72.

[0024] Further, the nozzle 72 is of concave design, and the cross-sectional area of ​​the cover 78 is larger than the cross-sectional area of ​​the nozzle 72, so that the cover 78 can fit tightly to the surface of the nozzle 72 to seal it and prevent impurities from entering.

[0025] To further illustrate, the number of the covers 78 is consistent with the number of the nozzles 71 , and the positions of the covers 78 and the nozzles 71 are distributed consistently.

[0026] To further explain, the nozzle 71 is a conical nozzle, and its spray shape is annular, which can better avoid the middle cover 78 and spray downward.

[0027] To further illustrate, the horizontal width of the connecting frame 77 does not exceed 10 mm, so that the connecting frame 77 is thin enough and does not easily block the nozzle 71.

[0028] To further explain, a clearing needle 79 is provided on the top of the cover 78. The clearing needle 79 matches the size specification of the nozzle 72, and the clearing needle 79 and the nozzle 72 are in the same vertical direction. The clearing needle 79 can be inserted into the inner side of the nozzle 72 to clear its channel, which can help the staff to clear the blockage.

[0029] Here’s how it works:

[0030] First, the tail gas generated in the phosphoric acid chemical production process needs to be purified by the spray tower 1. The specific purification process is as follows: the phosphoric acid tail gas enters the spray tower 1 through the flue gas pipe 4 and floats upward. At the same time, the liquid supply pipe 6 supplies liquid to the spray pipe 5, so that the nozzle 71 set on the spray pipe 5 sprays liquid mist downward through the nozzle 72, so that the phosphoric acid tail gas is flushed and purified by the liquid mist. The purified phosphoric acid tail gas is discharged from the spray tower 1 upward through the gas phase outlet 2, and the liquid mist is discharged from the spray tower 1 through the liquid phase outlet 3 below after condensing into droplets, thereby completing the wet purification of the phosphoric acid tail gas.

[0031] Second, when the spray pipe 5 is in working state, the liquid medicine in the spray pipe 5 will enter the sleeve 73 and push the piston 75 to move, so that the transmission rod 74 is pushed downward out of the sleeve 73 by the piston 75, and the transmission rod 74 drives the connecting frame 77 to move downward, so that the sealing cover 78 leaves the surface of the nozzle 72, ensuring that the spray head 71 can operate normally.

[0032] Third, when the spray pipe 5 is in an idle state, the liquid supply pipe 6 stops supplying liquid to the spray pipe 5, so that the internal hydraulic pressure of the sleeve 73 is reduced. At this time, the elastic force of the return spring 76 will exceed the internal hydraulic pressure of the sleeve 73, so that the return spring 76 pushes the transmission rod 74 to move and retract upward to the inside of the sleeve 73 until the cover 78 fits tightly to the surface of the nozzle 72, so that the cover 78 closes the nozzle 72 to prevent impurities from entering, thereby reducing the failure rate of the nozzle 71.

[0033] Fourthly, by providing a clearing needle 79 on the top of the cover 78, the clearing needle 79 can be driven to move inside the nozzle 72 when the cover 78 moves, thereby clearing the inner channel thereof, which can help the staff to clear the blockage.

[0034] The utility model provides a phosphoric acid wet purification device, by arranging an anti-blocking spray device 7 on the surface of a spray pipe 5, when the spray pipe 5 is in an idle state, the liquid supply pipe 6 stops supplying liquid to the spray pipe 5, so that the internal hydraulic pressure of the sleeve 73 is reduced, and at this time, the elastic force of the reset spring 76 will exceed the internal hydraulic pressure of the sleeve 73, so that the reset spring 76 pushes the transmission rod 74 to move and reset to shrink upward to the inside of the sleeve 73 until the sealing cover 78 is tightly fitted to the surface of the nozzle 72, so that the sealing cover 78 closes the nozzle 72 to prevent impurities from entering, and reduce the failure rate of the nozzle 71, and by arranging a clearing needle 79 on the top of the sealing cover 78, the sealing cover 78 can drive the clearing needle 79 to move inside the nozzle 72 when it moves, so as to clear the inner channel thereof, and can help the staff to clear the blockage fault.

[0035] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A phosphoric acid wet purification device, comprising a spray tower (1), a gas phase outlet (2), a liquid phase outlet (3), a flue gas pipeline (4), a spray pipe (5) and a liquid supply pipe (6), wherein the top of the spray tower (1) is provided with a gas phase outlet (2), the bottom of the spray tower (1) is provided with a liquid phase outlet (3), the lower right end of the spray tower (1) is connected to the flue gas pipeline (4), the spray pipe (5) is horizontally installed at the upper inner end of the spray tower (1), and the left end of the spray pipe (5) extends out of the inner side of the spray tower (1) and is connected to the liquid supply pipe (6); Features: The spray pipe (5) also includes an anti-blocking spray device (7), the surface of which is provided with the anti-blocking spray device (7), the anti-blocking spray device (7) comprising a spray head (71), a nozzle (72), a sleeve (73), a transmission rod (74), a piston (75), a return spring (76), a connecting frame (77) and a sealing cover (78), a row of spray heads (71) are installed at the bottom of the spray pipe (5), a nozzle (72) is provided at the center of the bottom end surface of the spray head (71), a sleeve (73) is provided at the bottom of the spray pipe (5), the sleeve (73) is communicated with the inner side of the spray pipe (5), and the sleeve (73) is parallel to the spray head (71). ), a transmission rod (74) is slidably provided at the bottom opening of the sleeve (73), a piston (75) is installed at the top of the transmission rod (74), and the piston (75) is sealed and slidably fitted against the inner wall of the sleeve (73), a return spring (76) is sleeved on the outside of the transmission rod (74), the top of the return spring (76) is in contact with the piston (75), and the bottom of the return spring (76) is in contact with the sleeve (73), the bottom end of the transmission rod (74) extends out of the sleeve (73) and is connected and fixed to the connecting frame (77), and a row of sealing covers (78) are provided on the surface of the connecting frame (77), and the sealing covers (78) are located directly below the nozzle (72).

2. A phosphoric acid wet purification device according to claim 1, characterized in that: The nozzle (72) is of concave design, and the cross-sectional area of ​​the cover (78) is larger than the cross-sectional area of ​​the nozzle (72).

3. A phosphoric acid wet purification device according to claim 1, characterized in that: The number of the sealing caps (78) is consistent with the number of the nozzles (71), and the position distribution of the sealing caps (78) and the nozzles (71) is consistent.

4. A phosphoric acid wet purification device according to claim 1, characterized in that: The nozzle (71) is a conical nozzle.

5. The phosphoric acid wet purification equipment according to claim 1, characterized in that: The horizontal width of the connecting frame (77) does not exceed 10 mm.

6. The phosphoric acid wet purification equipment according to claim 1, characterized in that: A clearing needle (79) is arranged on the top of the sealing cover (78), the size of the clearing needle (79) matches that of the nozzle (72), and the clearing needle (79) and the nozzle (72) are located in the same vertical direction.

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