Chlorine pumping device

Abstract

The utility model relates to a chlorine pumping device which comprises a Nessler pump (1), a regulating valve (2), a conveying pipeline (3) and a gas-liquid separation tank (5), the Nessler pump is used for providing power for conveying chlorine, the regulating valve is arranged at the end of a gas inlet (11) of the Nessler pump, and the outlet end of the regulating valve is communicated with the gas inlet (11) of the Nessler pump. One end of the conveying pipeline is fixedly connected with the inlet end of the adjusting valve and internally communicated, the other end of the conveying pipeline is used for being communicated with the waste gas buffer tank, and a gas-liquid inlet (51) of the gas-liquid separation tank is communicated with a gas outlet (12) of the Nessler pump. The device can prevent a large amount of chlorine from entering the Nessler pump, damaging a liquid ring of the Nessler pump, affecting normal operation of the Nessler pump and preventing a large amount of chlorine from entering a deinsectization system and being not absorbed in time at the moment when the tank car starts to release pressure, and prevents the inner wall of the conveying pipeline from being separated from and falling off from the pipe wall of the pipeline to cause blockage of the pipeline. The service life of the device is influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chlorine gas pumping device, especially to the structure of chlorine gas pumping device. BACKGROUND

[0002] Chlorine is yellow-green gas at normal temperature and pressure, has strong pungent smell, chemical property is active, has toxicity, violent irritability and corrosiveness, can react with most elements (or compounds), will burn and explode when mixing with other flammable gases under sunlight, has corrosion effect on almost all metals and non-metals, can seriously corrode iron, steel, copper and zinc in humid environment, chlorine reacts with water to generate hypochlorous acid and hydrochloric acid, reacts with sodium hydroxide, potassium hydroxide and other alkalis to generate hypochlorite and chloride, and can utilize the reaction to carry out harmless treatment on chlorine.

[0003] During the chlorine loading process, chlorine of the chlorine distribution table first enters the liquefier and is cooled to about -15 DEG C to form liquid chlorine, then enters the liquid chlorine storage tank after gas-liquid separation in the gas-liquid separation tank, and finally is filled into the tank car by the packing pump after being pressurized to 0.8~1.0MPa. During the filling, in order to balance the internal pressure of the tank car, the liquid phase filling and the gas phase balance pressure mode are adopted, and the chlorine discharged from the tank car enters the waste gas buffer tank first, and then is pumped to the decontamination system by the chlorine pumping device.

[0004] The existing chlorine pumping device is composed of a Nash pump and a carbon steel lined fluorine pipeline, the Nash pump is communicated with the waste gas buffer tank through the carbon steel lined fluorine pipeline, when the tank car is not filled with chlorine, the suction force generated by the Nash pump forms negative pressure in the carbon steel lined fluorine pipeline, which can cause the separation and falling off of the lining fluorine from the wall of the carbon steel lined fluorine pipeline, resulting in the blockage of the pipeline and affecting the service life. When the tank car is filled with chlorine, a large amount of chlorine is discharged at the moment when the tank car starts to decompress, a large amount of chlorine enters the Nash pump, destroys the liquid ring of the Nash pump, affects the normal operation of the Nash pump, a large amount of chlorine enters the decontamination system and cannot be absorbed in time, causing environmental pollution.

[0005] The utility model aims at providing a chlorine pumping device, solves the problem that the lining fluorine pipeline forms negative pressure and causes the falling off of the lining fluorine when not filled with chlorine, and a large amount of chlorine destroys the liquid ring of the Nash pump at the moment when the chlorine is decompressed during the filling, and cannot be absorbed in time by the decontamination system. Utility model content

[0006] In order to solve the above problems, the utility model provides chlorine pumping device, including nash pump 1, regulating valve 2, conveying pipeline 3 and gas -liquid separation tank 5, nash pump 1 is used to provide the power of chlorine delivery. Regulating valve 2 sets up at the air inlet 11 end of nash pump 1, and the outlet end of regulating valve 2 is communicated with the air inlet 11 of nash pump 1. Conveying pipeline 3 one end is fixedly connected with the import end of regulating valve 2, and is communicated inside, and the other end is used for and waste gas buffer tank communication, and the gas -liquid import 51 of gas -liquid separation tank 5 is communicated with the gas outlet 12 of nash pump 1.

[0007] The utility model discloses a regulating valve 2 is provided at the air inlet 11 of nash pump 1, can first adjust the opening of regulating valve 2 when filling chlorine to tank car 8, control the air intake in nash pump 1, after the chlorine that tank car 8 pressure relief discharges is stable, again, the opening of regulating valve 2 is adjusted to be big. Prevent a large number of chlorine from entering nash pump 1 at the moment when tank car 8 starts pressure relief, destroys the liquid ring of nash pump 1, influences the normal operation of nash pump 1, a large number of chlorine enters the pest control system 7, cannot absorb in time, causes environmental pollution. When not filling chlorine to tank car 8, can close regulating valve 2 or adjusting valve 2 is adjusted to small opening, makes conveying pipeline 3 inside be in the state of small negative pressure, prevents the separation on the inner wall of conveying pipeline 3 and the pipe wall of pipeline from falling off, causes the blockage of pipeline, influences service life.

[0008] Preferably, it further includes a one-way valve 34 located between the regulating valve 2 and the air inlet 11 of the nash pump 1, the inlet end of the one-way valve 34 is fixedly connected with the outlet end of the regulating valve 2 and is in internal communication, and the outlet end of the one-way valve 34 is fixedly connected with the air inlet 11 of the nash pump 1 and is in internal communication.

[0009] By setting the one-way valve 4, the sulfuric acid in the nash pump 1 can be prevented from flowing back into the conveying pipeline 3, and the conveying pipeline 3 can be prevented from being corroded by sulfuric acid.

[0010] Preferably, the conveying pipeline 3 is a carbon steel fluorine-lined pipeline. By setting the conveying pipeline 3 as a carbon steel fluorine-lined pipeline, the corrosion by chlorine can be prevented, and the service life can be prolonged.

[0011] Preferably, the conveying pipeline 3 is fixedly connected with the import end of the regulating valve 2 through a first loose flange 31, and a Teflon gasket 32 is arranged between the first loose flange 31 and the import end of the regulating valve 2.

[0012] By fixing the conveying pipeline 3 with the regulating valve 2 through the first loose flange 31, the firmness of the connection can be improved, and the disassembly and assembly are convenient. The Teflon gasket 32 is arranged between the first loose flange 31 and the import end of the regulating valve 2, the Teflon gasket 32 has good properties such as corrosion resistance, aging resistance and non-conductivity, can maintain the sealing property of the interface under harsh conditions, and can prevent chlorine leakage.

[0013] Preferably, the gas inlet 11 of the Nash pump 1 is fixedly connected with the outlet end of the one-way valve 34 through the second loop flange 13, and a fluorine gasket 32 is arranged between the second loop flange 13 and the outlet end of the one-way valve 34.

[0014] The gas inlet 11 of the Nash pump 1 is fixedly connected with the outlet end of the one-way valve 4 through the second loop flange 13, which can improve the firmness of the connection and facilitate disassembly. The fluorine gasket 32 arranged between the second loop flange 13 and the outlet end of the one-way valve 4 can maintain the sealing property of the interface under harsh conditions and prevent chlorine leakage.

[0015] Preferably, the inlet end of the one-way valve 34 and the outlet end of the regulating valve 2 are fixedly connected through bolts, and a fluorine gasket 32 is arranged between the inlet end of the one-way valve 34 and the outlet end of the regulating valve 2.

[0016] The inlet end of the one-way valve 4 and the outlet end of the regulating valve 2 are fixedly connected through bolts, which can improve the firmness of the connection of the one-way valve 4 and the regulating valve 2 and facilitate disassembly. The fluorine gasket 32 arranged between the inlet end of the one-way valve 4 and the outlet end of the regulating valve 2 can maintain the sealing property of the interface under harsh conditions and prevent chlorine leakage.

[0017] Preferably, the liquid ring medium of the Nash pump 1 is 98% concentrated sulfuric acid. Concentrated sulfuric acid has strong water absorption and dehydration, which can fully absorb the water carried in the chlorine gas and prevent pipeline and equipment corrosion. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 . The overall structure of the chlorine gas pumping device is shown in the schematic view.

[0019] Figure 2 . Figure 1 The enlarged schematic view of the middle A is shown.

[0020] Figure 3 . The schematic view of the chlorine gas pumping device in use is shown.

[0021] In the figure, 1. Nash pump, 11. Gas inlet, 12. Gas outlet, 13. Second loop flange, 2. Regulating valve, 3. Delivery pipeline, 31. First loop flange, 32. Fluorine gasket, 4. One-way valve, 5. Gas-liquid separation tank, 51. Gas-liquid inlet, 52. Gas phase outlet, 53. Liquid phase outlet, 6. Waste gas buffer tank, 61. Pressure relief pipe, 7. Harm removal system, 8. Tank car, 9. Filling crane. DETAILED DESCRIPTION

[0022] The preferred embodiments of the utility model will be described in detail below with reference to the drawings.

[0023] As Figure 1 and Figure 2As shown, the chlorine gas pumping device comprises a Nash pump 1, a one-way valve 4, a regulating valve 2, a conveying pipeline 3 and a gas-liquid separation tank 5.

[0024] The Nash pump 1 is used to provide power for chlorine gas conveying, and the liquid ring medium of the Nash pump 1 is 98% concentrated sulfuric acid. The liquid ring medium of the Nash pump 1 is set to be 98% sulfuric acid, and the concentrated sulfuric acid has strong water absorption and dehydration, which can fully absorb the water carried in the chlorine gas and prevent the pipeline and equipment from being corroded.

[0025] The one-way valve 4 is arranged at the gas inlet end 11 of the Nash pump 1. Through the one-way valve 4, the backflow of sulfuric acid in the Nash pump 1 into the conveying pipeline 3 can be prevented, and the conveying pipeline 3 can be prevented from being corroded by sulfuric acid.

[0026] The gas inlet end 11 of the Nash pump 1 is fixedly connected with the outlet end of the one-way valve 4 through the second loop flange 13, and the inside is communicated. A fluorine pad 32 is arranged between the second loop flange 13 and the outlet end of the one-way valve 4.

[0027] The gas inlet end 11 of the Nash pump 1 is fixedly connected with the outlet end of the one-way valve 4 through the second loop flange 13, which can improve the firmness of the connection and is convenient to disassemble and assemble. The fluorine pad 32 is arranged between the second loop flange 13 and the outlet end of the one-way valve 4, which can keep the sealing of the interface under harsh conditions and prevent chlorine gas from leaking.

[0028] The outlet end of the regulating valve 2 is fixedly connected with the inlet end of the one-way valve 4 through bolts, and the inside is communicated. A fluorine pad 32 is arranged between the outlet end of the regulating valve 2 and the inlet end of the one-way valve 4.

[0029] The outlet end of the regulating valve 2 is fixedly connected with the inlet end of the one-way valve 4 through bolts, which can improve the firmness of the connection between the one-way valve 4 and the regulating valve 2 and is convenient to disassemble and assemble. The fluorine pad 32 is arranged between the outlet end of the regulating valve 2 and the inlet end of the one-way valve 4, which can keep the sealing of the interface under harsh conditions and prevent chlorine gas from leaking.

[0030] The conveying pipeline 3 is a carbon steel fluorine-lined pipeline, one end of which is fixedly connected with the inlet end of the regulating valve 2 through the first loop flange 31, and the inside is communicated. The other end is used for communicating with the waste gas buffer tank. A fluorine pad 32 is arranged between the first loop flange 31 and the inlet end of the regulating valve 2.

[0031] The inlet end of the regulating valve 2 refers to the end of the regulating valve 2 close to the conveying pipeline 3, and the outlet end of the regulating valve 2 refers to the end of the regulating valve 2 close to the Nash pump.

[0032] The inlet end of the one-way valve 4 refers to the end of the one-way valve 4 close to the conveying pipeline 3, and the outlet end of the one-way valve 4 refers to the end of the one-way valve 4 close to the Nash pump.

[0033] The conveying pipeline 3 is constructed of carbon steel lined with fluoropolymer to prevent corrosion by chlorine gas and extend its service life. The conveying pipeline 3 is fixedly connected to the inlet end of the regulating valve 2 via a first loose flange 31, which improves the connection's strength and facilitates easy assembly and disassembly. A PTFE gasket 32 ​​is installed between the first loose flange 31 and the inlet end of the regulating valve 2. The PTFE gasket 32 ​​possesses excellent properties such as corrosion resistance, aging resistance, and non-conductivity, maintaining the sealing of the interface under harsh conditions and preventing chlorine gas leakage.

[0034] The gas-liquid inlet 51 of the gas-liquid separator 5 is connected to the gas outlet 12 of the Nash pump 1. The gas phase outlet 52 of the gas-liquid separator 5 is connected to the pest control system 7, and the discharged chlorine gas enters the pest control system 7 for treatment. The liquid phase outlet 53 of the gas-liquid separator 5 discharges sulfuric acid, which can be reused.

[0035] like Figure 2 As shown, when the chlorine extraction device is in use, the delivery pipeline 3 is connected to the outlet of the waste gas buffer tank 6, and the liquid phase outlet 53 of the gas-liquid separator 5 is connected to the sulfuric acid recovery device. When filling the tank truck 8 with liquid chlorine, the liquid chlorine in the loading arm 9 enters the tank truck 8. A small amount of liquid chlorine entering the tank truck 8 will turn into chlorine gas. In order to balance the pressure inside the tank truck 8, the chlorine gas in the tank truck 8 is discharged into the waste gas buffer tank 6 through the pressure relief pipe 61. At this time, the opening of the regulating valve 2 is reduced to control the amount of gas entering the Nash pump 1. After the chlorine gas pressure is stabilized, the opening of the regulating valve 2 is increased. After the chlorine gas is pumped to the gas-liquid separator 5 by the Nash pump 1, the chlorine gas and the entrained sulfuric acid are separated by the gas-liquid separator 5. The chlorine gas is discharged into the hazard removal system 7 for treatment through the gas phase outlet 52, and the sulfuric acid discharged from the liquid phase outlet 53 enters the sulfuric acid recovery system for recovery. After the tanker truck 8 is filled, close the regulating valve 2 or adjust the regulating valve 2 to a small opening so that the inside of the conveying pipeline 3 is in a small negative pressure state.

[0036] This invention, by installing a regulating valve 2 at the air inlet 11 of the Nash pump 1, allows for the initial reduction of the valve opening when filling the tank truck 8 with chlorine. This controls the amount of chlorine entering the Nash pump 1, and then gradually increases the valve opening once the chlorine released from the tank truck 8 has stabilized. This prevents a large amount of chlorine from entering the Nash pump 1 at the moment of depressurization, which could damage the liquid ring of the Nash pump 1, affect its normal operation, or cause environmental pollution due to excessive chlorine entering the chlorination system 7.

[0037] When chlorine is not being filled into tank truck 8, regulating valve 2 can be closed or adjusted to a small opening to maintain a small negative pressure inside the conveying pipeline 3. This prevents the gas from separating from or detaching from the pipe wall, causing blockage and affecting the pipeline's service life. A check valve 4 prevents sulfuric acid from flowing back into the conveying pipeline 3 from the Nash pump 1, thus preventing corrosion of the pipeline by sulfuric acid.

[0038] It should be noted that the above embodiments illustrate the present application rather than limit the present application.

Claims

1. Chlorine gas pumping device, characterized in that, Including the nash pump (1), regulating valve (2), conveying pipeline (3) and gas-liquid separation tank (5), The nash pump (1) is used for providing power for chlorine gas conveying; The regulating valve (2) is arranged at the gas inlet (11) end of the nash pump (1), and the outlet end of the regulating valve (2) is communicated with the gas inlet (11) of the nash pump (1); The conveying pipeline (3) is fixedly connected with the inlet end of the regulating valve (2) at one end and is communicated internally, and the other end is used for being communicated with the exhaust gas buffer tank; The gas-liquid inlet (51) of the gas-liquid separation tank (5) is communicated with the gas outlet (12) of the nash pump (1).

2. The chlorine gas pumping apparatus according to claim 1, characterized by Further comprising a one-way valve (34), The one-way valve (34) is located between the regulating valve (2) and the gas inlet (11) of the nash pump (1), the inlet end of the one-way valve (34) is fixedly connected with the outlet end of the regulating valve (2) and is communicated internally, and the outlet end of the one-way valve (34) is fixedly connected with the gas inlet (11) of the nash pump (1) and is communicated internally.

3. The chlorine gas pumping apparatus according to claim 2, characterized by The conveying pipeline (3) is a carbon steel lined fluorine pipeline.

4. The chlorine gas pumping apparatus according to claim 3, characterized by The conveying pipeline (3) is fixedly connected with the inlet end of the regulating valve (2) through the first loose flange (31), The first loose flange (31) and the inlet end of the regulating valve (2) are provided with a tetrafluoroethylene gasket (32) therebetween.

5. The chlorine gas pumping apparatus according to claim 4, characterized by The gas inlet (11) of the nash pump (1) is fixedly connected with the outlet end of the one-way valve (34) through the second loose flange (13), The second loose flange (13) and the outlet end of the one-way valve (34) are provided with a tetrafluoroethylene gasket (32) therebetween.

6. The chlorine gas pumping apparatus according to claim 5, characterized by The inlet end of the one-way valve (34) and the outlet end of the regulating valve (2) are fixedly connected through bolts, The inlet end of the one-way valve (34) and the outlet end of the regulating valve (2) are provided with a tetrafluoroethylene gasket (32) therebetween.

7. The chlorine gas pumping apparatus according to any one of claims 1 to 6, characterized by The liquid ring medium of the nash pump (1) is 98% concentrated sulfuric acid.

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