Phosphorus processing plant evacuation pipe phosphorus vapor spraying system

Abstract

The application discloses a phosphorus vapor spraying system of a phosphorus processing workshop emptying pipe and belongs to the technical field of yellow phosphorus workshop modification. The phosphorus vapor spraying system comprises a phosphorus receiving tank, an emptying pipe connected with the phosphorus receiving tank, a detection unit, a control unit, an air introduction unit and a spraying unit. The detection unit detects the concentration of phosphorus vapor above the connection between the phosphorus receiving tank and the emptying pipe and feeds back the detection result to the control unit. The air introduction unit rapidly introduces the steam entering the emptying pipe into a gas collecting part. The spraying unit sprays the emptying pipe to condense the steam. The control unit controls the air introduction unit and the spraying unit according to the feedback signal of the detection unit. The spraying system disclosed by the application can greatly improve the phosphorus recovery efficiency of the emptying pipe and has high automation degree.

Description

Technical Field

[0001] This invention relates to the field of yellow phosphorus workshop renovation technology, and in particular to a phosphorus vapor spraying system for the exhaust pipe of a phosphorus processing workshop. Background Technology

[0002] In the yellow phosphorus production and recovery process, only the condensation tower has a spray system. When the system pressure is too high, some phosphorus vapor cannot be completely condensed and is discharged through the vent pipe, affecting the environment and wasting resources. Existing phosphorus processing workshops are not perfect. Patent number CN204963597U discloses "a phosphorus vapor spraying device for vent pipes in phosphorus processing workshops," which solves the above problems to some extent, but still has shortcomings. For example, the structure of the device is too simple, making it difficult to achieve automatic control; due to the shape limitations of the vent pipe, conventional nozzles cannot completely cover the vent pipe, resulting in insufficient phosphorus vapor condensation and difficulty in achieving high recovery efficiency. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention aims to provide a spray system that can fully condense discharged phosphorus vapor, has high recovery efficiency, and is automatically controlled.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A phosphorus vapor spraying system for a phosphorus processing workshop includes a phosphorus receiving tank and an exhaust pipe connected to the receiving tank, as well as a detection unit, a control unit, an air intake unit, and a spraying unit. The exhaust pipe is arranged longitudinally, with the middle section offset radially inward to form a gas collecting section. The gas collecting section is fixedly connected to the upper and lower exhaust pipes via a tapered structure, forming an upper air guide section and a lower air guide section. The taper of the upper air guide section is greater than that of the lower air guide section, and the bottom of the gas collecting section is provided with an inwardly inclined guide plate. The detection unit detects the phosphorus vapor concentration above the connection between the receiving tank and the exhaust pipe and feeds the detection result back to the control unit. The air intake unit quickly guides the vapor entering the exhaust pipe into the gas collecting section. The spraying unit sprays the inside of the exhaust pipe to condense the vapor. The control unit controls the operation of the air intake unit and the spraying unit based on the feedback signal from the detection unit.

[0005] Preferably, the air intake unit is located below the lower air guide section; the air intake unit consists of at least two air intake fans, and the longitudinal projection of the air intake fans is located outside the air collection section.

[0006] Preferably, the exhaust fans are evenly distributed around the central axis of the exhaust pipe.

[0007] Preferably, the exhaust fan is provided with a protective cover, the upper end of which extends upward and then offsets inward, and the offset section is an arc-shaped curved surface.

[0008] Preferably, the spray unit is located above the upper air guide section; the spray unit includes at least two vertically distributed spray pipes, each spray pipe is provided with at least two rotating nozzles; the rotating nozzles on adjacent spray pipes are staggered in the axial direction of the exhaust pipe.

[0009] Preferably, the rotating nozzle is a four-nozzle rotating nozzle, and the rotation direction of the rotating nozzle is perpendicular to the axis of the drain pipe.

[0010] Preferably, the vertical distance between the bottommost spray pipe and the top of the upper air guide section is 30-80cm, and the vertical distance between adjacent spray pipes is 60-110cm.

[0011] Preferably, the detection unit is a phosphorus vapor concentration detector with an external protective cover.

[0012] Compared with the prior art, the present invention has the following advantages: (1) Automatic control is achieved through the design of detection unit, control unit, air intake unit and spray unit. When the detection unit detects the presence of phosphorus vapor in the exhaust pipe, the spray unit and air intake unit are started in sequence to achieve spraying first and then air intake. The air intake unit quickly introduces phosphorus vapor into the gas collection section. Since the diameter of the gas collection section is smaller than the outer diameter of the exhaust pipe and the taper of the lower gas guide section is smaller than the taper of the upper gas guide section, the phosphorus vapor achieves the effect of fast entry and slow exit in the gas collection section, thus greatly improving the spraying effect. (2) The design of the spray unit, namely multiple spray pipes and staggered rotating nozzles, allows the spray surface to completely cover the entire exhaust pipe, further improving the spraying effect. (3) The longitudinal position of the air intake fan, the structure of the protective cover and the structure of the guide plate provide a recovery channel for phosphorus vapor condensation and recovery, which will not be affected by the air intake unit. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure; Figure 2 This is a schematic diagram.

[0014] In the diagram: 1. Gas collection section; 11. Guide plate; 2. Upper gas guide section; 3. Lower gas guide section; 4. Exhaust fan; 41. Protective cover; 5. Spray pipe; 6. Rotary nozzle; 7. Phosphorus vapor concentration detector; 100. Phosphorus receiving tank; 200. Exhaust pipe. Implementation

[0015] The structure and principles of the present invention will now be fully explained in conjunction with specific embodiments, so that those skilled in the art can fully understand and implement it.

[0016] like Figure 1 , Figure 2As shown, a phosphorus vapor spraying system for a phosphorus processing workshop includes a phosphorus receiving tank 100 and an exhaust pipe 200 connected to the receiving tank 100, and further includes a detection unit, a control unit, an air venting unit, and a spraying unit. Wherein: The detection unit detects the concentration of phosphorus vapor above the connection between the phosphorus receiving tank 100 and the vent pipe 200, and feeds the detection results back to the control unit.

[0017] The induced draft unit rapidly guides the steam entering the exhaust pipe 200 into the gas collection section 1.

[0018] The spray unit sprays water into the vent pipe 200 to condense the steam.

[0019] The control unit controls the operation of the air intake unit and the spray unit based on the feedback signal from the detection unit.

[0020] Further configuration: The exhaust pipe 200 is arranged longitudinally, and the middle pipe is offset radially inward to form an air collection section 1; the air collection section 1 is fixedly connected to the exhaust pipes 200 on the upper and lower sides through a tapered structure to form an upper air guide section 2 and a lower air guide section 3. The taper of the upper air guide section 2 is greater than the taper of the lower air guide section 3, and the bottom of the air collection section 1 is provided with an inwardly inclined guide plate 11.

[0021] The air intake unit is located below the lower air guide section 3. The air intake unit consists of two air intake fans 4, one on the left and one on the right. The longitudinal projection of the air intake fan 4 is located outside the air collection section 1. The two air intake fans 4 are symmetrically distributed with the central axis of the exhaust pipe 200 as the center. A protective cover 41 is provided around the air intake fan 4. The upper end of the protective cover 41 extends upward and then offsets inward, and the offset section is an arc-shaped curved surface.

[0022] The spray unit is located above the upper air guide section 2. Each spray unit includes two vertically distributed spray pipes 5, each equipped with four rotating nozzles 6. The rotating nozzles 6 on adjacent spray pipes 5 are staggered along the axis of the exhaust pipe 200. Each rotating nozzle 6 is a four-nozzle rotating nozzle, and the rotation direction of the rotating nozzle 6 is perpendicular to the axis of the exhaust pipe 200. The vertical distance between the lowermost spray pipe 5 and the top of the upper air guide section 2 is 30–80 cm, and the vertical distance between adjacent spray pipes 5 is 60–110 cm.

[0023] Among them, the detection unit is a phosphorus vapor concentration detector 7, which is equipped with a protective cover.

[0024] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the technical principles and scope of the present invention. Therefore, any combination, modification, or substitution made to the technical features disclosed in the present invention based on the technical essence of the present invention, without departing from the principles or solutions of the present invention, should fall within the protection scope of the present invention.

Claims

1. A phosphorus vapor spraying system for an exhaust pipe in a phosphorus processing workshop, comprising a phosphorus receiving tank (100) and an exhaust pipe (200) connected to the phosphorus receiving tank (100), characterized in that, It also includes a detection unit, a control unit, an air intake unit, and a spray unit; the exhaust pipe (200) is arranged longitudinally, with the middle pipe radially offset inward to form a gas collection section (1); the gas collection section (1) is fixedly connected to the exhaust pipes (200) on the upper and lower sides through a conical structure to form an upper air guide section (2) and a lower air guide section (3), the taper of the upper air guide section (2) is greater than the taper of the lower air guide section (3), and the bottom of the gas collection section (1) is provided with an inwardly inclined guide plate (11); the detection unit detects the phosphorus vapor concentration above the connection between the phosphorus receiving tank (100) and the exhaust pipe (200) and feeds the detection result back to the control unit; the air intake unit draws air into the exhaust pipe (200) The steam of 0) is quickly introduced into the gas collection section (1); the spray unit sprays the inside of the exhaust pipe (200) to condense the steam; the control unit controls the operation of the induced air unit and the spray unit according to the feedback signal of the detection unit; the induced air unit is located below the lower gas guide section (3); the induced air unit consists of at least two induced air fans (4), the longitudinal projection of the induced air fans (4) is located outside the gas collection section (1); the induced air fans (4) are evenly distributed around the central axis of the exhaust pipe (200); the induced air fans (4) are provided with a protective cover (41) around the periphery, the upper end of the protective cover (41) extends upward and then shifts inward, the shifted section is an arc-shaped curved surface.

2. The phosphorus vapor spraying system for the exhaust pipe of a phosphorus processing workshop as described in claim 1, characterized in that, The spray unit is located above the upper air guide (2); the spray unit includes at least two vertically distributed spray pipes (5), each spray pipe (5) is provided with at least two rotating nozzles (6); the rotating nozzles (6) on adjacent spray pipes (5) are staggered in the axial direction of the drain pipe (200).

3. A phosphorus vapor spraying system for the exhaust pipe of a phosphorus processing workshop as described in claim 2, characterized in that, The rotating nozzle (6) is a four-nozzle rotating nozzle, and the rotation direction of the rotating nozzle (6) is perpendicular to the axis of the drain pipe (200).

4. A phosphorus vapor spraying system for the exhaust pipe of a phosphorus processing workshop as described in claim 2, characterized in that, The vertical distance between the bottom spray pipe (5) and the top of the upper air guide (2) is 30-80cm, and the vertical distance between adjacent spray pipes (5) is 60-110cm.

5. A phosphorus vapor spraying system for the exhaust pipe of a phosphorus processing workshop as described in any one of claims 1 to 4, characterized in that, The detection unit is a phosphorus vapor concentration detector (7), which is equipped with a protective cover.

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