All-time automatic extraction system for yellow phosphorus furnace gas

Abstract

The utility model discloses a yellow phosphorus furnace gas all-time automatic extraction system which comprises a cooling tower, a first exhaust pipe and a second exhaust pipe are arranged in the middle of the upper end of the cooling tower and at the upper end of one side of the cooling tower respectively, and the other end of the first exhaust pipe is connected with a buffer storage assembly. The other end of the second exhaust pipe is connected with the middle of the top of the second purification box through a three-way connector, a second conveying pipe, a frequency conversion fan and a third conveying pipe. The lower end of one side of the second purification box is connected with the lower end of one side of the gas cabinet through a communicating pipe. According to the yellow phosphorus furnace gas full-time-period automatic extraction system, the first variable-frequency suction pump, the quantitative suction pump, the variable-frequency fan and the second variable-frequency suction pump are matched for use, so that the smoke suction and conveying speed is conveniently changed according to the pressure value of smoke generated by combustion in the furnace, the pressure in the furnace is conveniently and automatically adjusted, the use safety is improved, and the practicability is high. And secondly, by adjusting the flue gas conveying capacity, the furnace gas is continuously conveyed to the subsequent recovery treatment process, and the furnace gas is prevented from being directly discharged to a torch to be combusted.

Description

Technical Field

[0001] The utility model relates to the technical field related to yellow phosphorus production, in particular to a full-time automatic extraction system for yellow phosphorus furnace gas. Background Art

[0002] Yellow phosphorus furnace is a kind of equipment used to refine yellow phosphorus. Its working principle is to put phosphate ore and fuel (usually sulfur carbon) into the furnace, and carry out reduction reaction under high temperature conditions. The phosphorus vapor generated by the reaction is cooled and solidified into solid yellow phosphorus and collected. Yellow phosphorus furnace usually adopts top feeding method, that is, phosphate ore and fuel are added layer by layer from the top of the furnace. In the furnace, phosphate ore and fuel are mixed and reacted under high temperature conditions to generate phosphorus vapor and some by-products (such as carbon monoxide, nitrogen, etc.). Phosphorus vapor is discharged from the top of the furnace along with high-temperature flue gas, and solid yellow phosphorus is obtained through cooling and condensation.

[0003] The gas water ring vacuum pumps used in the current yellow phosphorus production process all use manual adjustment of the size of the reflux valve and the vent valve to achieve pressure balance in the electric furnace, and the motor and pump under this adjustment method are almost all running at full load; at the same time, the monitoring of the pressure in the furnace is achieved by the operator's experience and judgment and manual opening and closing of the valve, which is easy to cause negative pressure in the tail gas pipeline due to poor human control, resulting in safety accidents. Therefore, in view of the above problems, it is necessary to improve the existing equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a full-time automatic extraction system for yellow phosphorus furnace gas, so as to solve the problem that the gas water ring vacuum pump used in the current yellow phosphorus production process proposed in the above background technology adopts manual adjustment of the size of the reflux valve and the vent valve to achieve pressure balance in the electric furnace. The motor and the pump under this adjustment mode are almost all in full-load operation, and the monitoring of the pressure in the furnace is achieved by the operator's experience and judgment and manual opening and closing of the valve. It is easy to cause the exhaust pipe to draw negative pressure due to poor human control, resulting in safety accidents.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions: a full-time automatic extraction system for yellow phosphorus furnace gas, including a cooling tower,

[0006] A first exhaust pipe is arranged on the top of the cooling tower, a second exhaust pipe is arranged on the upper end of the cooling tower, and a quantitative suction pump is installed on the first exhaust pipe, and the other end of the first exhaust pipe is connected to the buffer storage assembly; the other end of the second exhaust pipe is connected to the bottom of the buffer storage assembly through a three-way connector, the other outlet of the three-way connector is connected to the second delivery pipe, and the other end of the second delivery pipe is connected to the third delivery pipe through a variable frequency fan, and the other end of the third delivery pipe is connected to a second purification box; the lower end of the second purification box is connected to a gas tank through a connecting pipe, and a second variable frequency suction pump is installed on the connecting pipe; a discharge channel is arranged on the top of the gas tank, and a second temperature detector is also arranged on the gas tank.

[0007] Preferably, a first variable frequency vacuum pump is provided at the lower end of the cooling tower, and a liquid inlet spray pipe is connected to the upper end of the cooling tower, the liquid inlet spray pipe passes through the cooling tower and extends to the inside of the cooling tower; a first temperature detector is also provided on the cooling tower, and a drain valve is provided at the bottom of the cooling tower.

[0008] Preferably, the buffer storage assembly includes a first buffer tank, the outlet end of the first exhaust pipe is connected to the first buffer tank, a quantitative discharge valve is provided at the bottom of the first buffer tank, and the bottom of the quantitative discharge valve is connected to the three-way connector; a first air pressure detector is provided on the first buffer tank, a first connecting pipe is provided at the top of the first buffer tank, and an emptying water seal is installed on the first connecting pipe; the top of the first connecting pipe is connected to the bottom of the first purification box, and an emptying pipe is provided at the upper end of the first purification box.

[0009] Preferably, the upper end of the first buffer tank and the lower end of the first buffer tank are respectively connected to a first delivery pipe and a circulation pipe, the other end of the first delivery pipe and the other end of the circulation pipe are commonly connected to a second buffer tank, and a second air pressure detector is provided on the second buffer tank.

[0010] Preferably, the structure inside the first purification box is the same as the structure inside the second purification box, and both the first purification box and the second purification box are provided with multiple filter plates, dehumidification cotton layers and activated carbon layers, and the filter plates and dehumidification cotton layers are arranged alternately.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the yellow phosphorus furnace gas full-time automatic extraction system,

[0012] (1) In order to solve the problem that the gas water ring vacuum pump used in the current yellow phosphorus production process adopts manual adjustment of the size of the reflux valve and the vent valve to achieve pressure balance in the electric furnace, the motor and pump under this adjustment mode are almost all in full load operation, and the monitoring of the pressure in the furnace is achieved by the operator's experience and judgment and manual opening and closing of the valve, which is easy to cause the tail gas pipeline to draw negative pressure due to poor human control, resulting in safety accidents. The present application arranges a first variable frequency vacuum pump, a quantitative suction pump, a variable frequency fan and a second variable frequency vacuum pump for use, so as to change the speed of flue gas suction and delivery according to the pressure value of the flue gas generated by combustion in the furnace, so as to automatically adjust the pressure in the furnace and improve the safety of use. Secondly, by adjusting the flue gas delivery capacity, the continuous delivery of furnace gas to the subsequent recovery and treatment process is maintained to avoid the furnace gas being directly discharged to the torch for combustion;

[0013] (2) In order to solve the problem that the existing exhaust gas extraction device cannot realize the extraction and treatment of all the exhaust gas generated, the present application is provided with a buffer storage component. By setting a first buffer tank and a second buffer tank for use, it is convenient to store the flue gas generated in the furnace in portions, so that the extraction system can continuously operate and transport and operate safely during operation. At the same time, a first purification box and a second purification box are provided to reduce the pollution of the exhaust gas to the air environment during emission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front view structure of the cooling tower of the utility model;

[0016] Figure 3 This is a schematic diagram of the front view structure of the buffer storage component of the utility model.

[0017] In the figure: 1. cooling tower; 101. first variable frequency vacuum pump; 102. liquid inlet spray pipe; 103. first temperature detector; 104. drain valve; 2. first exhaust pipe; 201. quantitative suction pump; 3. buffer storage assembly; 301. first buffer tank; 302. quantitative discharge valve; 303. first air pressure detector; 304. first connecting pipe; 305. drain water seal; 306. first purification box; 307. drain pipe; 308. first delivery pipe; 309. second buffer tank; 310. circulation pipe; 311. second air pressure detector; 4. second exhaust pipe; 5. three-way connector; 6. second delivery pipe; 7. variable frequency fan; 8. third delivery pipe; 9. second purification box; 10. connecting pipe; 11. second variable frequency vacuum pump; 12. gas cabinet; 13. second temperature detector; 14. discharge channel. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides a technical solution: a full-time automatic extraction system for yellow phosphorus furnace gas, according to Figure 1 , Figure 2 and Figure 3 As shown, a first variable frequency vacuum pump 101 is provided at the lower end of one side of the cooling tower 1, and a liquid inlet spray pipe 102 is provided at the upper end of one side of the cooling tower 1, and the liquid inlet spray pipe 102 passes through the cooling tower 1 and extends to the inside of the cooling tower 1, a first temperature detector 103 is provided at the upper end of the front side of the cooling tower 1, and a drain valve 104 is provided at the bottom of the lower end of the cooling tower 1, so as to facilitate the discharge of the purified and cooled liquid inside the cooling tower 1, a first exhaust pipe 2 is provided at the top of the cooling tower 1, a second exhaust pipe 4 is provided on one side of the upper end of the cooling tower 1, and a quantitative suction pump 201 is installed on the first exhaust pipe 2, and the outlet end of the first exhaust pipe 2 is connected to the buffer storage component 3.

[0020] Specifically, the buffer storage assembly 3 includes a first buffer tank 301, the outlet end of the first exhaust pipe 2 is connected to the upper end of the first buffer tank 301, a quantitative discharge valve 302 is arranged at the bottom of the lower end of the first buffer tank 301, and the bottom of the quantitative discharge valve 302 is connected to the three-way connector 5; at the same time, a first air pressure detector 303 is arranged on the front of the first buffer tank 301, and the first air pressure detector 303 is convenient for monitoring the air pressure inside the first buffer tank 301, a first connecting pipe 304 is arranged in the middle of the upper end of the first buffer tank 301, and an emptying water seal 305 is installed on the first connecting pipe 304; the top of the first connecting pipe 304 is connected to the bottom of the lower end of the first purification box 306, and the upper end of the first purification box 306 is provided with an emptying pipe 307.

[0021] To further explain, the upper end of the first buffer tank 301 is also connected to a first delivery pipe 308, and the lower end of the first purification box 306 is also connected to a circulation pipe 310. The first delivery pipe 308 and the circulation pipe 310 are both connected to the second buffer tank 309, and a second air pressure detector 311 is provided on the front of the second buffer tank 309 to facilitate monitoring of the air pressure inside the second buffer tank 309.

[0022] To further explain, the internal structure of the first purification box 306 is the same as the internal structure of the second purification box 9, and both the first purification box 306 and the second purification box 9 are provided with multiple filter screens, dehumidification cotton layers and activated carbon layers, and the filter screens and dehumidification cotton layers are alternately arranged to improve the purification and filtering effect.

[0023] according to Figure 1 As shown, the other end of the second exhaust pipe 4 is connected to the quantitative discharge valve 302 in the buffer storage assembly 3 through a three-way connector 5, and the second exhaust pipe 4 is also connected to one end of the second delivery pipe 6 through the three-way connector 5, and the other end of the second delivery pipe 6 is connected to one end of the third delivery pipe 8 through a variable frequency fan 7; at the same time, the other end of the third delivery pipe 8 is connected to the middle of the top of the second purification box 9, which is convenient for purifying and adsorbing harmful substances and water vapor in the flue gas to improve the cleanliness of later emissions. The lower end of one side of the second purification box 9 is connected to the lower end of one side of the gas tank 12 through a connecting pipe 10, and a second variable frequency exhaust pump 11 is installed on the connecting pipe 10, which is convenient for changing the suction wind speed efficiency according to the air pressure conditions to improve the practicality of use; an exhaust channel 14 is arranged in the middle of the upper end of the gas tank 12, and a second temperature detector 13 is arranged on the front of the gas tank 12 to facilitate the detection of the combustion temperature in the gas tank 12.

[0024] When in use, the flue gas inside the furnace body is transported to the cooling tower 1 through the first variable frequency vacuum pump 101. At the same time, the liquid inlet spray pipe 102 sprays the cooling tower 1 with atomization to cool down the impurities and temperature in the flue gas. Then, the cooled flue gas enters the first buffer tank 301 and the second buffer tank 309 through the first exhaust pipe 2 for storage. At the same time, the flue gas enters the second purification box 9 through the second exhaust pipe 4, the three-way connector 5, the second delivery pipe 6, the variable frequency fan 7, and the third delivery pipe 8 for purification and filtration. Then, the flue gas enters the gas cabinet 12 through the connecting pipe 10 and the second variable frequency vacuum pump 11 for storage. , for later use, when the smoke in the furnace is discharged, the smoke stored in the first buffer tank 301 and the second buffer tank 309 enters the second purification box 9 through the three-way connector 5, the second delivery pipe 6, the variable frequency fan 7, and the third delivery pipe 8 for purification and filtration, and then enters the gas cabinet 12 through the connecting pipe 10 and the second variable frequency vacuum pump 11 for storage for later use, or is discharged through the first connecting pipe 304, the emptying water seal 305, the first purification box 306 and the emptying pipe 307, and connected to other tank bodies to store the smoke inside other tank bodies for later use.

[0025] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the protection content of the present invention.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A full-time automatic extraction system for yellow phosphorus furnace gas, comprising a cooling tower (1), characterized in that: A first exhaust pipe (2) is arranged at the top of the cooling tower (1), a second exhaust pipe (4) is arranged at the upper end of the cooling tower (1), and a quantitative suction pump (201) is installed on the first exhaust pipe (2), and the other end of the first exhaust pipe (2) is connected to the buffer storage component (3); the other end of the second exhaust pipe (4) is connected to the bottom of the buffer storage component (3) through a three-way connector (5), the other outlet of the three-way connector (5) is connected to a second delivery pipe (6), and the other end of the second delivery pipe (6) is connected to a third delivery pipe (8) through a variable frequency fan (7), and the other end of the third delivery pipe (8) is connected to a second purification box (9); the lower end of the second purification box (9) is connected to a gas tank (12) through a connecting pipe (10), and a second variable frequency suction pump (11) is installed on the connecting pipe (10); a discharge channel (14) is arranged on the top of the gas tank (12), and a second temperature detector (13) is also arranged on the gas tank (12).

2. The full-time automatic extraction system of yellow phosphorus furnace gas according to claim 1, characterized in that: The lower end of the cooling tower (1) is provided with a first variable frequency vacuum pump (101), and the upper end of the cooling tower (1) is connected with a liquid inlet spray pipe (102), the liquid inlet spray pipe (102) passes through the cooling tower (1) and extends into the interior of the cooling tower (1); the cooling tower (1) is also provided with a first temperature detector (103), and the bottom of the cooling tower (1) is provided with a liquid discharge valve (104).

3. The full-time automatic extraction system of yellow phosphorus furnace gas according to claim 1 is characterized in that: The buffer storage assembly (3) comprises a first buffer tank (301), the outlet end of the first exhaust pipe (2) is connected to the first buffer tank (301), a quantitative discharge valve (302) is arranged at the bottom of the first buffer tank (301), and the bottom of the quantitative discharge valve (302) is connected to a three-way connector (5); a first air pressure detector (303) is arranged on the first buffer tank (301), a first connecting pipe (304) is arranged at the top of the first buffer tank (301), and an emptying water seal (305) is installed on the first connecting pipe (304); the top of the first connecting pipe (304) is connected to a first purification box (306), and an emptying pipe (307) is arranged at the upper end of the first purification box (306).

4. The full-time automatic extraction system for yellow phosphorus furnace gas as claimed in claim 3 is characterized in that: The upper end of the first buffer tank (301) and the lower end of the first buffer tank (301) are respectively connected to a first delivery pipe (308) and a circulation pipe (310); the other end of the first delivery pipe (308) and the other end of the circulation pipe (310) are commonly connected to a second buffer tank (309); and a second air pressure detector (311) is provided on the second buffer tank (309).

5. The full-time automatic extraction system of yellow phosphorus furnace gas as claimed in claim 3 is characterized in that: The structure inside the first purification box (306) is the same as the structure inside the second purification box (9), and both the first purification box (306) and the second purification box (9) are provided with a plurality of filter screens, dehumidification cotton layers and activated carbon layers, and the filter screens and dehumidification cotton layers are arranged alternately.

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