Phosphorus flame retardant production waste gas recovery treatment equipment

Abstract

The utility model relates to the technical field of waste gas recovery treatment, in particular to phosphorus flame retardant production waste gas recovery treatment equipment. Comprising a heat exchange mechanism and a treatment mechanism, the heat exchange mechanism is connected with an air inlet of the treatment mechanism through a pipeline, the treatment mechanism comprises a tank body, an exhaust port is formed in the top of the tank body, an emptying pipe is arranged at the bottom of the tank body, a valve is arranged on the emptying pipe, and a demisting plate and a plurality of parallel segmental guide plates are sequentially arranged in the tank body from top to bottom; through mutual cooperation of the heat exchange box, the spraying head, the spiral pipe, the partition plate and other structures, heat in waste gas is transferred into water, and heat recovery is achieved; the flowing direction of the waste gas is changed and the retention time of the waste gas in the tank body is prolonged through the plurality of segmental guide plates, so that the waste gas and the treatment liquid have sufficient time to react, and the treatment effect on the waste gas is improved; treatment liquid fog drops in the waste gas are removed through the baffle plate, so that the discharged gas cannot pollute the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas recovery and treatment, in particular to waste gas recovery and treatment equipment for phosphorus flame retardant production. Background Art

[0002] Phosphorus flame retardants can be divided into two categories: inorganic phosphorus flame retardants and organic phosphorus flame retardants according to their composition and structure. Red phosphorus flame retardant is a purple or slightly brown amorphous powder. It is an organic halogen-free flame retardant with excellent thermal stability, non-volatility, no generation of corrosive gases, good flame retardant effect, good electrical insulation, etc. It has the advantages of no toxic risk during use, small addition amount, insolubility, high melting point, etc. However, waste will be generated during the production process of red phosphorus flame retardant masterbatch.

[0003] Chinese patent number CN202320935294.1 discloses a phosphorus-based flame retardant production waste gas recovery and treatment equipment, in which a spray mechanism is arranged. Through the mutual cooperation between the various structures in the spray mechanism, by arranging a treatment liquid tank, a second water pump, a liquid inlet pipe, a liquid outlet pipe spray barrel and an atomizing nozzle, a full reaction of phosphorus pentoxide waste gas and treatment liquid is achieved, thereby improving the treatment effect of phosphorus pentoxide waste gas.

[0004] The above patent has the following technical problems: when the spray mechanism sprays the waste gas, the contact time between the treatment liquid and the waste gas is short, resulting in incomplete reaction; and when the exhaust port is exhausted, the gas is mixed with the treatment liquid, and the gas will carry the treatment liquid into the atmosphere. Since the spray liquid contains chemical substances, it will have a certain impact on the environment if it is directly discharged into the air. For this reason, the utility model proposes a phosphorus flame retardant production waste gas recovery and treatment equipment. Utility Model Content

[0005] The utility model aims at the deficiencies of the prior art and provides a phosphorus flame retardant production waste gas recovery and treatment equipment, which can not only recover the heat in the waste gas, but also increase the waste gas treatment effect by increasing the contact time between the waste gas and the treatment liquid, and can also collect droplets in the exhaust gas.

[0006] In order to achieve the above technical objectives, the utility model proposes the following technical solutions: a phosphorus-based flame retardant production waste gas recovery and treatment equipment, including a heat exchange mechanism and a treatment mechanism, the heat exchange mechanism and the air inlet of the treatment mechanism are connected by a pipeline, the treatment mechanism includes a tank body, the top of the tank body is provided with an exhaust port, the bottom of the tank body is provided with a drain pipe, the drain pipe is provided with a valve, the tank body is provided with a defog plate and a plurality of parallel circular guide plates from top to bottom, the notches of two adjacent guide plates are staggered in opposite directions, and nozzles are provided between two adjacent guide plates, and the air inlet of the treatment mechanism is located below the guide plate.

[0007] Furthermore, the heat exchange mechanism includes a heat exchange box, a spray pipe is installed in the heat exchange box, a plurality of spray heads are provided on the spray pipe, a plurality of spiral tubes parallel to each other are installed in the heat exchange box and at the bottom of the spray head, an exhaust gas inlet is installed on one side of the heat exchange box, an exhaust gas outlet is provided on the other side of the heat exchange box, and a drain port is provided on one side of the lower part of the heat exchange box.

[0008] Furthermore, a filter tank is provided on the outer wall of the tank body and below the guide plate. The filter tank is separated from the tank body by a filter screen. The filter tank is connected to the nozzle by a nozzle, and an infusion pump is provided on the nozzle.

[0009] Furthermore, a plurality of baffles parallel to each other are fixedly connected to the bottom of the demister plate, an air flow channel is formed between two adjacent baffles, and an air outlet is provided on the demister plate and above the air flow channel.

[0010] Furthermore, a mounting hole is provided on the top of the filter tank, a holder parallel to the mounting hole is provided on the bottom of the filter tank, a limiting plate matching the mounting hole is provided on the top of the filter screen, and a handle is fixed to the top of the limiting plate.

[0011] Furthermore, guide holes are provided on both sides of the filter screen, and guide rods matching the guide holes are provided on the inner wall of the filter tank.

[0012] Compared with the prior art, the beneficial effects produced by the utility model are: the utility model has a novel structure, ingenious conception, simple and convenient operation, and has the following advantages compared with the prior art: the utility model transfers the heat in the exhaust gas to the water through the mutual cooperation of structures such as the heat exchange box, the spray head, the spiral tube and the partition, thereby realizing heat recovery; through a plurality of circular guide plates, the flow direction of the exhaust gas is changed, and the residence time of the exhaust gas in the tank is increased, so that the exhaust gas and the treatment liquid can have sufficient time to react, thereby improving the treatment effect of the exhaust gas; the treatment liquid droplets in the exhaust gas are removed through the baffle plate to ensure that the discharged gas will not pollute the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a top view structural diagram of the processing mechanism of the utility model;

[0015] Figure 3 The utility model Figure 2 Schematic diagram of the AA section structure;

[0016] Figure 4 This utility model is an enlarged view of the mechanism at B;

[0017] Figure 5This is an enlarged view of the mechanism at C of the utility model;

[0018] Figure 6 It is a schematic diagram of the structure of the filter screen of the utility model.

[0019] In the figure, 1. treatment mechanism; 101. tank body; 102. exhaust port; 103. exhaust pipe; 104. defog plate; 105. guide plate; 106. nozzle; 107. nozzle; 108. infusion pump; 109. baffle; 110. air flow channel; 111. air outlet; 2. heat exchange mechanism; 201. heat exchange box; 202. spray pipe; 203. spray head; 204. partition; 205. spiral tube; 206. exhaust gas inlet; 207. exhaust gas outlet; 208. drain port; 3. pipeline; 4. filter tank; 5. filter screen; 6. mounting hole; 7. holder; 8. limit plate; 9. handle; 10. guide hole. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention, and the technical solution of the present invention is further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0021] like Figure 1-6 As shown, the utility model provides a phosphorus-based flame retardant production waste gas recovery and treatment equipment, including a heat exchange mechanism 2 and a treatment mechanism 1, the heat exchange mechanism 2 is connected to the air inlet of the treatment mechanism 1 through a pipeline 3, the treatment mechanism 1 includes a tank body 101, the top of the tank body 101 is provided with an exhaust port 102, the bottom of the tank body 101 is provided with a drain pipe 103, the drain pipe 103 is provided with a valve, the tank body 101 is provided with a defog plate 104 and a plurality of parallel circular notch guide plates 105 from top to bottom, the notches of two adjacent guide plates 105 are staggered in opposite directions, and nozzles 106 are provided between the two adjacent guide plates 105, and the nozzles 106 are staggered on both sides of the tank body 101, and the air inlet of the treatment mechanism 1 is located below the guide plate 105.

[0022] like Figure 1 As shown, the heat in the exhaust gas is recovered through the heat exchange mechanism 2, and the cooled exhaust gas will enter the tank body 101 along the pipeline 3. The exhaust gas flows out of the exhaust port 102 in the tank body 101 from bottom to top along the notch of the guide plate 105 in an S-shaped path. At the same time, the nozzle 106 sprays the treatment liquid on the exhaust gas. The treatment liquid of the utility model can use potassium hydroxide as a medium to react with phosphorus pentoxide in the exhaust gas. The treatment liquid contacts the exhaust gas. The utility model can change the flow direction of the exhaust gas and increase the contact time between the exhaust gas and the treatment liquid, so that the exhaust gas and the treatment liquid are fully in contact, thereby improving the treatment effect. The exhaust gas after the reaction passes through the demister plate 104 to remove the treatment liquid droplets carried in the exhaust gas after the reaction, so as to avoid the treatment liquid being discharged into the atmosphere and causing environmental pollution.

[0023] The heat exchange mechanism 2 includes a heat exchange box 201, in which a spray pipe 202 is installed, and a plurality of spray heads 203 are arranged on the spray pipe 202. Two partitions 204 are installed in the heat exchange box 201 and below the spray heads 203. A plurality of spiral tubes 205 parallel to each other are arranged between the two partitions 204, and the inlet and outlet ends of the spiral tubes 205 respectively pass through the two partitions 204. An exhaust gas inlet 206 is installed on one side of the heat exchange box 201, and an exhaust gas outlet 207 is arranged on the other side of the heat exchange box 201. The exhaust gas outlet 207 is connected to the air inlet of the processing mechanism 1 through a pipeline 3, and a drain port 208 is arranged at the lower part of one side of the heat exchange box 201.

[0024] like Figure 1 As shown, the exhaust gas after combustion enters the heat exchange box 201 from the exhaust gas inlet 206, contacts the multiple spiral tubes 205 in the heat exchange box 201, and the coolant of the spray head 203 enters the spiral tube 205. The coolant is preferably an aqueous solution. The aqueous solution in the spiral tube 205 exchanges heat with the exhaust gas outside the spiral tube 205. The exhaust gas after heat exchange enters the tank body 101 along the exhaust gas outlet 207. The aqueous solution after heat exchange falls into the heat exchange box 4 and is discharged along the drain port 208 to a place where hot water is needed, such as to the living place of factory employees, to provide hot water for employees to bathe, thereby indirectly saving the factory's expenses for providing hot water to employees.

[0025] A filter tank 4 is provided on the outer wall of the tank body 101 and below the guide plate 105 . The filter tank 4 is separated from the tank body 101 by a filter screen 5 . The filter tank 4 is connected to the nozzle 106 by a nozzle 107 . An infusion pump 108 is provided on the nozzle 107 .

[0026] like Figure 2 and 3 As shown, the exhaust gas after combustion may carry some impurities such as dust. After the exhaust gas of the utility model is treated by the treatment liquid, the impurities soluble in water or insoluble in water in the exhaust gas will be mixed in the treatment liquid. The impurities in the treatment liquid will be filtered out by the filter 5 to ensure the stability of the infusion pump 108 and avoid clogging of the nozzle 106, which will affect the treatment effect. The infusion pump 108 circulates the treatment liquid in the tank 101 and sprays it from the nozzle 106, repeatedly reacting with the phosphorus pentoxide in the exhaust gas, thereby improving the utilization rate of the treatment liquid.

[0027] A plurality of baffles 109 parallel to each other are fixedly connected to the bottom of the demister plate 104 , and an air flow channel 110 is formed between two adjacent baffles 109 . An air outlet 111 is provided on the demister plate 104 and above the air flow channel 110 .

[0028] like Figure 2 and 4As shown, the baffle 109 is in the shape of water corrugations, the purpose of which is to increase the residence time of the droplets in the air flow channel 110; when the droplets enter the air flow channel 110, since the baffle 109 is in the shape of water corrugations, the droplets will encounter obstruction of the baffle 109 during the upward movement. When the droplets touch the baffle 109, on the one hand, the movement direction of the droplets is changed, thereby increasing the residence time of the droplets in the tank body 101. On the other hand, the droplets contact the baffle 109 and adhere to the baffle 109. As the droplets on the baffle 109 become larger, droplets will be formed and fall along the baffle 109 onto the guide plate 105 in the tank body 101, and then fall to the bottom of the tank body 101 along the guide plate 105.

[0029] The top of the filter tank 4 is provided with a mounting hole 6, the bottom of the filter tank 4 is provided with a holder 7 parallel to the mounting hole 6, the top of the filter screen 5 is provided with a limit plate 8 adapted to the mounting hole 6, and the top of the limit plate 8 is fixed with a handle 9.

[0030] like Figure 5 and 6 As shown, the filter 5 is inserted into the filter tank 4 along the mounting hole 6, the bottom of the filter 5 is clamped in the holder 7 to limit the filter 7, the limiting plate 8 is clamped in the mounting hole 6, and the limiting plate 8 is provided with sealing gaskets around it to seal it, and the handle 9 can conveniently pull the filter 5 out of the filter tank 4, so as to facilitate regular cleaning and replacement of the filter 5.

[0031] Guide holes 10 are provided on both sides of the filter screen 5 , and guide rods matching the guide holes 10 are provided on the inner wall of the filter tank 4 .

[0032] like Figure 6 As shown, the guide rod is a semi-cylindrical structure, and the guide rod slides into the guide hole 10 to improve the sealing performance of the connection between the two sides of the filter screen 5 and the filter tank 4.

[0033] Principle of use: the waste gas generated after combustion enters the heat exchange box 201 along the waste gas inlet 206, and the water sprayed by the sprinkler head 203 enters the spiral tube 205 at the same time. The water in the spiral tube 205 exchanges heat with the waste gas outside the spiral tube 205. The waste gas after heat exchange enters the tank body 101 along the waste gas outlet 207. The aqueous solution after heat exchange falls into the heat exchange box 4 and is discharged to the place where hot water is needed along the drain port 208. The waste gas in the tank body 101 flows out of the exhaust port 102 in an S-shaped path from bottom to top along the notch of the guide plate 105. At the same time, the sprinkler head 106 sprays the treatment liquid on the waste gas. The treatment liquid contacts the waste gas and reacts with the phosphorus pentoxide in the waste gas. The waste gas after removing the phosphorus pentoxide passes through the baffle 109 on the demister plate 104 to remove the treatment liquid droplets carried in the waste gas, and the purified gas is discharged into the atmosphere along the exhaust port 102.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A phosphorus flame retardant production waste gas recovery and treatment equipment, characterized by: The invention comprises a heat exchange mechanism (2) and a treatment mechanism (1), wherein the heat exchange mechanism (2) is connected to the air inlet of the treatment mechanism (1) via a pipe (3), the treatment mechanism (1) comprises a tank body (101), the top of the tank body (101) is provided with an exhaust port (102), the bottom of the tank body (101) is provided with a drain pipe (103), the drain pipe (103) is provided with a valve, a demisting plate (104) and a plurality of parallel circular notch-shaped guide plates (105) are sequentially provided in the tank body (101) from top to bottom, the notches of two adjacent guide plates (105) are staggered in opposite directions, and a nozzle (106) is provided between two adjacent guide plates (105), and the air inlet of the treatment mechanism (1) is located below the guide plate (105).

2. The phosphorus flame retardant production waste gas recovery and treatment equipment according to claim 1, characterized in that: The heat exchange mechanism (2) comprises a heat exchange box (201), a spray pipe (202) is installed in the heat exchange box (201), a plurality of spray heads (203) are provided on the spray pipe (202), two partitions (204) are installed in the heat exchange box (201) and below the spray heads (203), a plurality of mutually parallel spiral tubes (205) are provided between the two partitions (204), the inlet and outlet ends of the spiral tubes (205) respectively penetrate the two partitions (204), an exhaust gas inlet (206) is installed on one side of the heat exchange box (201), an exhaust gas outlet (207) is provided on the other side of the heat exchange box (201), and a liquid discharge port (208) is provided at the lower part of one side of the heat exchange box.

3. The phosphorus flame retardant production waste gas recovery and treatment equipment according to claim 1, characterized in that: A filter tank (4) is provided on the outer wall of the tank body (101) and below the guide plate (105); the filter tank (4) and the tank body (101) are separated by a filter screen (5); the filter tank (4) and the nozzle (106) are connected by a nozzle (107); and an infusion pump (108) is provided on the nozzle (107).

4. The phosphorus flame retardant production waste gas recovery and treatment equipment according to claim 1, characterized in that: A plurality of mutually parallel baffles (109) are fixedly connected to the bottom of the demister plate (104), an air flow channel (110) is formed between two adjacent baffles (109), and an air outlet (111) is provided on the demister plate (104) and above the air flow channel (110).

5. The phosphorus flame retardant production waste gas recovery and treatment equipment according to claim 3, characterized in that: The top of the filter tank (4) is provided with a mounting hole (6), the bottom of the filter tank (4) is provided with a holder (7) parallel to the mounting hole (6), the top of the filter screen (5) is provided with a limit plate (8) adapted to the mounting hole (6), and the top of the limit plate (8) is fixedly connected with a handle (9).

6. The phosphorus flame retardant production waste gas recovery and treatment equipment according to claim 5, characterized in that: Guide holes (10) are provided on both sides of the filter screen (5), and guide rods matching the guide holes (10) are provided on the inner wall of the filter tank (4).

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