A vacuum impregnation and drying integrated system for anti-poison impregnated carbon and its use method

Abstract

The invention discloses a vacuum impregnation and drying integrated system for anti-poison impregnated carbon and a use method. The device comprises an impregnation tank, the shell of the impregnation tank is a sandwich structure, and the sandwich is filled with heat-conducting oil; the interior of the sandwich is connected to a temperature circulation controller through an oil inlet and return pipeline; a liquid inlet and an exhaust port are arranged inside the impregnation tank, the liquid inlet of the impregnation tank is connected to the liquid outlet of a metering pump through a pipeline, and the exhaust port of the impregnation tank is connected to an external filtering system through a pipeline; during use, the temperature and vacuum degree are controlled to control the efficient impregnation process, and excess ammonia is recycled and reused, thereby solving the problems of low generation efficiency, backward process and low resource recovery rate of the anti-poison impregnation equipment in the prior art, and having the characteristics of simple and stable structure, compact and efficient process, and effectively improving the impregnation efficiency of the anti-poison filter element.

Description

Technical Field

[0001] The invention belongs to the technical field of gas filter canister production, and particularly relates to a vacuum impregnation and drying integrated system for gas-proof impregnated carbon and a use method thereof. Background Art

[0002] Anti-toxic impregnated carbon can provide comprehensive protection and purification for classic poisons, industrial harmful gases, and toxic substances emitted indoors, ensuring the normal life and work of personnel in complex working environments. At present, the production of anti-toxic impregnated carbon has the following problems: 1. The equipment is complicated, the impregnation tank is separated from the vacuum drying tank, and the production efficiency is low; 2. The production process is backward. The traditional normal pressure and room temperature impregnation and open storage cannot meet the needs of mass production of high-performance anti-toxic impregnated carbon; 3. The volatile ammonia and carbon dust generated during the production process pollute the environment, and solvents such as ammonia water cannot be fully recycled. Therefore, it is necessary to design a vacuum impregnation and drying integrated system and use method of anti-toxic impregnated carbon to solve the above problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an integrated vacuum impregnation and drying system for anti-poison impregnated carbon and a method of use, aiming to solve the problems of low production efficiency, backward technology and low resource recovery rate of the anti-poison impregnation equipment in the prior art. The system has the characteristics of simple and stable structure, compact and efficient process, and can effectively improve the impregnation efficiency of the anti-poison filter element.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A vacuum impregnation and drying integrated system for poison-proof impregnated carbon comprises an impregnation tank, the shell of the impregnation tank is a sandwich structure, the sandwich is filled with heat-conducting oil; the interior of the sandwich is connected to a temperature circulation controller through an oil inlet and return pipeline; a liquid inlet and an exhaust port are arranged inside the impregnation tank, the liquid inlet of the impregnation tank is connected to the liquid outlet of a metering pump through a pipeline, and the exhaust port of the impregnation tank is connected to an external filtering system through a pipeline.

[0005] Furthermore, the impregnation tank is lined with 304 stainless steel, which can effectively prevent corrosion from the impregnation solution. It has a sandwich structure, a smooth outer wall and a concave-convex inner wall, which can effectively prevent wet carbon from sticking to the wall.

[0006] Furthermore, the metering pump is a plunger structure, and the flow rate can be infinitely adjusted within a range of 0% to 100%, and is used to pressurize and speed-control the configured impregnation solution and pump it into the impregnation tank.

[0007] Preferably, the filtration system comprises an external filter with a carbon ash discharge port at the bottom; the air inlet of the external filter is connected to the exhaust port of the impregnation tank, and the air outlet of the external filter is connected to the air inlet of the condenser.

[0008] Preferably, the condenser is a horizontally installed water-cooled jacket condenser; the air outlet of the condenser is connected to the buffer tank, and a liquid outlet is provided at the bottom of the buffer tank and connected to the front end of the liquid inlet of the metering pump.

[0009] Preferably, the air outlet of the buffer tank is connected to a water ring vacuum pump, and the air outlet end of the water ring vacuum pump is connected to a water tank; the concentration of the ammonia water collected in the buffer tank is between 3% and 5%.

[0010] Preferably, a plate heat exchanger is built into the water tank, and the plate heat exchanger is connected to a cold water source or a hot water source to adjust the temperature of the water ring vacuum pump. Cold water is passed to prevent the water temperature in the water tank from being too high and affecting the operation of the vacuum pump, or hot water is passed to prevent the water in the water tank from freezing due to low temperature.

[0011] Preferably, the temperature circulation controller comprises an electric heating device and a pump, the pump is connected to the oil inlet and return pipelines to circulate the heat transfer oil in the interlayer, and the electric heating device heats the circulating heat transfer oil.

[0012] Furthermore, the temperature control range of the temperature cycle controller is 20°C-200°C.

[0013] Preferably, a feed inlet is provided at the top of the impregnation tank, and a temperature controller is installed on the inner wall of the feed inlet.

[0014] Preferably, a filter screen is provided at the end of the exhaust port inside the impregnation tank, and a pressure gauge, a stop valve and a back-blowing pulse valve are provided on the pipeline between the exhaust port and the external filtering system.

[0015] Preferably, a spray head is connected to the end of the liquid inlet inside the immersion tank, and a discharge port is provided at the bottom of the immersion tank; a motor is connected to one side of the immersion tank, and the motor is connected to a stirring device inside the immersion tank.

[0016] Furthermore, the stirring device includes a stirring shaft arranged inside the immersion tank, and a plurality of stirring blades are connected to the outer surface of the stirring shaft; one end of the stirring shaft is rotatably connected to the shell inside the immersion tank and passes through the shell, and a sealed bearing is used at the rotating connection, which can prevent the heat transfer oil in the shell interlayer from flowing out, and also prevent the material and gas inside the immersion tank from leaking out. The stirring shaft passing through the outside of the shell is connected to the motor and the speed regulator, and the stirring device is driven to rotate by the motor.

[0017] A method for using a vacuum impregnation and drying integrated system for anti-poison impregnated carbon comprises the following steps: S1, feed the crushed coconut shell activated carbon with a water capacity of 90%-120% into the tank through the vacuum feeder from the feed port at the upper end of the impregnation tank, and monitor the temperature in the tank in real time through the temperature controller; S2, evacuate the inside of the impregnation tank, start the water ring vacuum pump to evacuate, when the pressure gauge shows that the vacuum degree reaches -0.03~-0.04Mpa, close the stop valve and turn off the water ring vacuum pump; S3, pumping the anti-poison mixed solution with a specific gravity of 1.21-1.31 into the impregnation tank through a metering pump, the end of the liquid outlet pipeline of the metering pump penetrates into the impregnation tank, and atomizing the mixed solution through a spray head, thereby impregnating the crushed coconut shell activated carbon; S4, during the impregnation process, the temperature in the impregnation tank is controlled within the range of 40-50°C by the temperature cycle controller in conjunction with the heat transfer oil, and the internal material is stirred by the stirring device driven by the motor to complete the vacuum hot impregnation; S5, after the vacuum hot dipping is completed, the back-blowing pulse valve is started and the stop valve is opened to back-blow the residual carbon ash and liquid in the pipeline, thereby adjusting the vacuum degree; S6, vacuum drying: Adjust the opening of the pressure reducing valve at the front end of the water ring vacuum pump to maintain the vacuum degree in the tank at -0.05~-0.07Mpa, and adjust the temperature circulation controller to increase the temperature of the heat transfer oil so that the temperature in the tank reaches 80~90℃ to perform vacuum drying; after vacuum drying is completed, the material is discharged from the tank discharge port and transferred to the boiling furnace for subsequent high-temperature activation; S7, during the vacuuming process, a filtration system is used to treat the residual gas inside the impregnation tank; the residual gas is extracted through the exhaust port of the impregnation tank, passes through the external filter and the condenser in sequence, and the condensed ammonia water is stored in the buffer tank and returns to the metering pump through the liquid outlet at the bottom of the buffer tank for recycling.

[0018] Furthermore, in step S6, the vacuum drying time is determined by the amount of impregnated carbon, and is generally 60-90 minutes.

[0019] The beneficial effects of the present invention are: The present invention integrates the vacuum impregnation system and the vacuum drying system, and can realize direct vacuum drying and drying after vacuum hot impregnation of activated carbon without transferring materials, thereby reducing the equipment footprint and production energy consumption. Vacuum hot impregnation can reduce the viscosity of the impregnation solution in the pores of the activated carbon and enhance the adsorption and diffusion effect of the impregnation solution in the activated carbon. Low-temperature vacuum drying can realize the gentle evaporation of ammonia water in the pores of the activated carbon and reduce energy consumption. At the same time, the system can recover volatile ammonia, prepare a dilute ammonia solution and then recycle it for environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The overall structural block diagram of the circuit of the present invention is shown in FIG. In the figure: impregnation tank 1, temperature cycle controller 2, metering pump 3, external filter 4, condenser 5, buffer tank 6, water ring vacuum pump 7, water tank 8, spray head 101, filter 103, feed port 104, discharge port 105, motor 106, speed regulator 107, temperature controller 109, pressure gauge 110, back-blowing pulse valve 111, stop valve 112. DETAILED DESCRIPTION

[0021] Embodiment 1: like Figure 1~Figure 2 In the invention, a vacuum impregnation and drying integrated system for poison-proof impregnated carbon includes an impregnation tank 1, the shell of the impregnation tank 1 is a sandwich structure, and the interlayer is filled with heat-conducting oil; the interior of the interlayer is connected to a temperature circulation controller 2 through an oil inlet and return pipe; a liquid inlet and an exhaust port are arranged inside the impregnation tank 1, the liquid inlet of the impregnation tank 1 is connected to the liquid outlet of a metering pump 3 through a pipeline, and the exhaust port of the impregnation tank 1 is connected to an external filtering system through a pipeline.

[0022] Furthermore, the impregnation tank 1 is lined with 304 stainless steel, which can effectively prevent corrosion from the impregnation solution, has a sandwich structure, a smooth outer wall, and a concave-convex inner wall, which can effectively prevent wet carbon from sticking to the wall.

[0023] Furthermore, the metering pump 3 is a plunger structure, and the flow rate can be infinitely adjusted within a range of 0% to 100%, and is used to pressurize and speed-control the configured impregnation solution and pump it into the impregnation tank 1.

[0024] Preferably, the filtration system includes an external filter 4 with a carbon ash discharge port at the bottom; the air inlet of the external filter 4 is connected to the exhaust port of the impregnation tank 1 , and the air outlet of the external filter 4 is connected to the air inlet of the condenser 5 .

[0025] Preferably, the condenser 5 is a horizontally installed water-cooled jacket condenser 5 ; the air outlet of the condenser 5 is connected to the buffer tank 6 , and a liquid outlet is provided at the bottom of the buffer tank 6 and connected to the front end of the liquid inlet of the metering pump 3 .

[0026] Preferably, the air outlet of the buffer tank 6 is connected to the water ring vacuum pump 7, and the air outlet end of the water ring vacuum pump 7 is connected to the water tank 8; the concentration of the ammonia water collected in the buffer tank 6 is between 3% and 5%.

[0027] Preferably, the water tank 8 has a built-in plate heat exchanger, which is connected to a cold water source or a hot water source to adjust the temperature of the water ring vacuum pump 7. Cold water is passed through the water tank 8 to prevent the water temperature from being too high and affecting the operation of the vacuum pump, or hot water is passed through the water tank 8 to prevent the water from freezing due to low temperature.

[0028] Preferably, the temperature circulation controller 2 includes an electric heating device and a pump, the pump is connected to the oil inlet and return pipelines to circulate the heat transfer oil in the interlayer, and the electric heating device heats the circulating heat transfer oil.

[0029] Furthermore, the temperature control range of the temperature cycle controller 2 is 20°C-200°C.

[0030] Preferably, a feed inlet 104 is provided at the top of the impregnation tank 1 , and a temperature controller 109 is installed on the inner wall of the feed inlet 104 .

[0031] Preferably, a filter screen 103 is provided at the end of the exhaust port inside the impregnation tank 1, and a pressure gauge 110, a stop valve 112 and a back-blowing pulse valve 111 are provided on the pipeline between the exhaust port and the external filtering system.

[0032] Preferably, a spray head 101 is connected to the end of the liquid inlet inside the immersion tank 1, and a discharge port 105 is provided at the bottom of the immersion tank 1; a motor 106 is connected to one side of the immersion tank 1, and the motor 106 is connected to a stirring device inside the immersion tank 1.

[0033] Furthermore, the stirring device includes a stirring shaft arranged inside the immersion tank 1, and a plurality of stirring blades are connected to the outer surface of the stirring shaft; one end of the stirring shaft is rotatably connected to the shell inside the immersion tank 1 and passes through the shell, and a sealed bearing is used at the rotating connection, which can prevent the heat transfer oil in the shell interlayer from flowing out, and also prevent the material and gas inside the immersion tank 1 from leaking out. The stirring shaft passing through the outside of the shell is connected to the motor 106 and the speed regulator 107 of the gear set structure, and the stirring device is driven to rotate by the motor 106.

[0034] Embodiment 2: A method for using a vacuum impregnation and drying integrated system for anti-poison impregnated carbon comprises the following steps: S1, feed the crushed coconut shell activated carbon with a water capacity of 90%-120% into the tank through the feed port 104 at the upper end of the impregnation tank 1 through a vacuum lifter, and monitor the temperature in the tank in real time through the temperature controller 109; S2, evacuate the inside of the impregnation tank 1, start the water ring vacuum pump 7 to evacuate, and when the pressure gauge 110 shows that the vacuum degree reaches -0.03~-0.04Mpa, close the stop valve 112 and turn off the water ring vacuum pump 7; S3, pumping the anti-poison mixed solution with a specific gravity of 1.21-1.31 into the impregnation tank 1 through the metering pump 3, the end of the liquid outlet pipeline of the metering pump 3 penetrates into the impregnation tank 1, and atomizing the mixed solution through the spray head 101, thereby impregnating the crushed coconut shell activated carbon; S4, during the impregnation process, the temperature in the impregnation tank 1 is controlled within the range of 40-50°C by the temperature cycle controller 2 in cooperation with the heat transfer oil, and the stirring device is driven by the motor 106 to stir the internal material to complete the vacuum hot impregnation; S5, after the vacuum hot dipping is completed, the backflush pulse valve 111 is started and the stop valve 112 is opened to backflush the carbon ash and liquid remaining in the pipeline, thereby adjusting the vacuum degree; S6, vacuum drying: Adjust the opening of the pressure reducing valve at the front end of the water ring vacuum pump 7 to maintain the vacuum degree in the tank at -0.05~-0.07Mpa, and adjust the temperature circulation controller 2 to increase the temperature of the heat transfer oil so that the temperature in the tank reaches 80~90°C to perform vacuum drying; after the vacuum drying is completed, the material is discharged from the tank discharge port 105 and transferred to the boiling furnace for subsequent high-temperature activation; S7, during the vacuuming process, a filtering system is used to treat the residual gas inside the impregnation tank 1; the residual gas is extracted through the exhaust port of the impregnation tank 1, passes through the external filter 4 and the condenser 5 in sequence, and the condensed ammonia water is stored in the buffer tank 6, and returns to the metering pump 3 through the liquid outlet at the bottom of the buffer tank 6 for recycling.

[0035] Furthermore, in step S6, the vacuum drying time is determined by the amount of impregnated carbon, and is generally 60-90 minutes.

[0036] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A vacuum impregnation and drying integrated system for anti-poison impregnated carbon, characterized in that: The invention comprises an immersion tank (1), wherein the shell of the immersion tank (1) is a sandwich structure, and the sandwich is filled with heat transfer oil; the interior of the sandwich is connected to a temperature circulation controller (2) via an oil inlet and return pipe; a liquid inlet and an exhaust port are arranged inside the immersion tank (1); the liquid inlet of the immersion tank (1) is connected to the liquid outlet of a metering pump (3) via a pipeline, and the exhaust port of the immersion tank (1) is connected to an external filtering system via a pipeline.

2. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 1, characterized in that: The filtration system comprises an external filter (4), wherein an air inlet of the external filter (4) is connected to an air outlet of the impregnation tank (1), and an air outlet of the external filter (4) is connected to an air inlet of a condenser (5).

3. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 2, characterized in that: The condenser (5) is a water-cooled jacketed condenser; the gas outlet of the condenser (5) is connected to the buffer tank (6); the bottom of the buffer tank (6) is provided with a liquid outlet connected to the front end of the liquid inlet of the metering pump (3).

4. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 3 is characterized in that: The gas outlet of the buffer tank (6) is in communication with the water ring vacuum pump (7), and the gas outlet end of the water ring vacuum pump (7) is in communication with the water tank (8).

5. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 4, characterized in that: The water tank (8) has a built-in plate heat exchanger, which is connected to a cold water source or a hot water source to adjust the temperature of the water ring vacuum pump (7).

6. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 1, characterized in that: The temperature circulation controller (2) comprises an electric heating device and a pump, wherein the pump is connected to the oil inlet and return pipes to circulate the heat transfer oil in the interlayer, and the electric heating device heats the circulating heat transfer oil.

7. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 1, characterized in that: The top of the impregnation tank (1) is provided with a feed inlet (104), and the inner wall of the feed inlet (104) is installed with a temperature controller (109).

8. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 1, characterized in that: A filter screen (103) is provided at the end of the exhaust port inside the impregnation tank (1), and a pressure gauge (110), a stop valve (112) and a back-blowing pulse valve (111) are provided on the pipeline between the exhaust port and the external filtering system.

9. The vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to claim 1, characterized in that: The end of the liquid inlet inside the impregnation tank (1) is connected to a spray head (101), and a discharge port (105) is provided at the bottom of the impregnation tank (1); a motor (106) is connected to one side of the impregnation tank (1), and the motor (106) is connected to a stirring device inside the impregnation tank (1).

10. The method for using the vacuum impregnation and drying integrated system for anti-poison impregnated carbon according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, feeding crushed coconut shell activated carbon with a water content of 90%-120% into the tank through a vacuum feeder from a feed port (104) at the upper end of the impregnation tank (1), and monitoring the temperature in the tank in real time through a temperature controller (109); S2, evacuating the interior of the impregnation tank (1), starting the water ring vacuum pump (7) to evacuate the interior of the impregnation tank (1), and when the pressure gauge (110) shows that the vacuum degree reaches -0.03 to -0.04 MPa, closing the stop valve (112) and turning off the water ring vacuum pump (7); S3, pumping the anti-poison mixed solution with a specific gravity of 1.21 to 1.31 into the impregnation tank (1) through the metering pump (3), the end of the liquid outlet pipeline of the metering pump (3) penetrates into the impregnation tank (1), and atomizing the mixed solution through the spray head (101), thereby impregnating the crushed coconut shell activated carbon; S4, during the impregnation process, the temperature in the impregnation tank (1) is controlled within the range of 40 to 50° C. by means of the temperature cycle controller (2) in cooperation with the heat transfer oil, and at the same time, the stirring device is driven by the motor (106) to stir the internal material, thereby completing the vacuum heat impregnation; S5, after the vacuum hot dipping is completed, the backflush pulse valve (111) is started and the stop valve (112) is opened to backflush the carbon ash and liquid remaining in the pipeline, thereby adjusting the vacuum degree; S6, vacuum drying: The opening of the pressure reducing valve at the front end of the water ring vacuum pump (7) is adjusted to maintain the vacuum degree in the tank at -0.05~-0.07Mpa, and the temperature circulation controller (2) is controlled to increase the temperature of the heat transfer oil so that the temperature in the tank reaches 80~90°C to perform vacuum drying; after the vacuum drying is completed, the material is discharged from the tank discharge port (105) and transferred to the boiling furnace for subsequent high-temperature activation; S7, during the vacuuming process, a filtration system is used to treat the residual gas inside the impregnation tank (1); the residual gas is extracted through the exhaust port of the impregnation tank (1), passes through the external filter (4) and the condenser (5) in sequence, and the condensed ammonia water is stored in the buffer tank (6), and returns to the metering pump (3) through the liquid outlet at the bottom of the buffer tank (6) for recycling.

Images