CN-117839340-B - Leakage dangerous chemical recycling system and recycling method

CN117839340BCN 117839340 BCN117839340 BCN 117839340BCN-117839340-B

Abstract

The invention discloses a leakage dangerous chemical recovery system and a recovery method, wherein the system comprises a dangerous chemical collection box, a venturi generator, a suction pipe and a high-pressure inert gas cylinder, wherein the high-pressure inert gas cylinder is connected with one end of the venturi generator, a collection box inlet is formed in one side of the dangerous chemical collection box, a collection box outlet is formed in the top of the dangerous chemical collection box, the venturi generator is communicated with the collection box outlet in the top of the dangerous chemical collection box through a pipeline, the suction pipe is communicated with the collection box inlet on one side of the dangerous chemical collection box, and negative pressure can be generated when the high-pressure inert gas enters the venturi generator to suck leakage dangerous chemicals into the dangerous chemical collection box through the suction pipe. According to the recovery device and the recovery method for the leaked dangerous goods, provided by the invention, the mixed gas of the inert gas and the treated dangerous chemical tail gas can be returned to the suction pipe, so that the gas concentration in the dangerous chemical collecting box is kept below the explosion lower limit, and the explosion in the dangerous chemical collecting box is prevented.

Inventors

CHEN SONG
ZHENG YI
ZHAO XIANGDI
JIANG CHUNYU
MA MING
WANG ZHENG
ZHANG GUANGWEN

Assignees

中国石油化工股份有限公司
中石化安全工程研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20220930

Claims (12)

1. The leakage dangerous chemical recovery system is characterized by comprising a dangerous chemical collecting box, a venturi generator and a suction pipe, wherein a collecting box inlet is formed in one side of the dangerous chemical collecting box, a collecting box outlet is formed in the top of the dangerous chemical collecting box, the venturi generator is communicated with the collecting box outlet at the top of the dangerous chemical collecting box through a pipeline, and the suction pipe is communicated with the collecting box inlet on one side of the dangerous chemical collecting box; The venturi generator comprises a venturi generator cavity, an air inlet pipe positioned at one side of the upper part of the venturi generator cavity and an air outlet pipe positioned at the other side of the upper part of the venturi generator cavity, and the central axis of the air inlet pipe and the central axis of the air outlet pipe are positioned on the same straight line; The inlet end of an air inlet pipe of the venturi generator is connected with a high-pressure inert gas cylinder, and the outlet end of the air inlet pipe is communicated with the cavity of the venturi generator; The inlet end of the exhaust pipe of the Venturi generator is communicated with the cavity of the Venturi generator, the outlet end of the exhaust pipe comprises a first exhaust outlet which is directly communicated with the atmospheric environment and a second exhaust outlet which is communicated with the suction pipe, and the second exhaust outlet is communicated with the suction pipe through a hose.
2. The leakage dangerous chemical recycling system according to claim 1, wherein the dangerous chemical collecting box is internally provided with a VOC gas concentration detector, and the hose is provided with a flow regulating valve.
3. The leakage hazard recovery system of claim 1, wherein an inner diameter of an intake pipe of said venturi generator decreases stepwise from an inlet end of the intake pipe toward an outlet end of the intake pipe.
4. The leakage dangerous chemical recycling system according to claim 3, wherein the air inlet pipe of the venturi generator sequentially comprises a primary steady flow section, a necking section and a secondary steady flow section from the inlet end of the air inlet pipe to the outlet end of the air inlet pipe, the primary steady flow section and the secondary steady flow section of the air inlet pipe are in a straight cylinder shape, the necking section of the air inlet pipe is in a conical shape, and the ratio of the inner diameter of the secondary steady flow section to the inner diameter of the primary steady flow section of the air inlet pipe is 0.1-0.5.
5. The leakage hazard recovery system according to claim 4, wherein the ratio of the inner diameter of the outlet end of the air inlet pipe of the venturi generator to the inner diameter of the inlet end of the air outlet pipe is 0.01-0.97.
6. The leakage dangerous chemical recycling system according to claim 1, wherein the ratio of the distance L between the outlet end of the air inlet pipe and the inlet end of the air outlet pipe of the venturi generator to the inner diameter D of the cavity of the venturi generator is 0.11-0.91.
7. The leakage dangerous chemical recycling system according to claim 1, wherein the inner diameter of the hose is smaller than the inner diameter of the outlet end of the exhaust pipe, and the ratio of the inner diameter of the hose to the inner diameter of the outlet end of the exhaust pipe is 0.15-0.87.
8. The leakage hazard recovery system of claim 1, wherein a collection box inlet on one side of said hazard collection box is disposed obliquely downward.
9. The leakage hazard recovery system of claim 1, wherein at least one filter screen is disposed within the hazard collection tank above the collection tank inlet.
10. The leakage hazard recovery system of claim 1, wherein an adsorbent material is disposed within a conduit between the venturi generator and the hazard collection tank.
11. A leakage hazard recovery method using a leakage hazard recovery system according to any one of claims 1 to 10, comprising the steps of: (1) Opening a high-pressure inert gas cylinder to enable the high-pressure inert gas to enter a venturi generator, wherein the high-pressure inert gas generates negative pressure in the venturi generator due to the change of flow velocity, and dangerous chemicals are sucked into a dangerous chemicals collecting box; (2) Under the action of negative pressure, dangerous chemical gas and/or steam in the dangerous chemical collecting box is pumped into the cavity of the Venturi generator and mixed with inert gas, part of mixed gas is discharged into the atmosphere, and the other part of mixed gas enters the suction pipe through a hose and then enters the dangerous chemical collecting box together with the pumped dangerous chemical, so that the concentration of the dangerous chemical gas and/or steam is lower than the lower explosion limit.
12. The method for recycling hazardous chemical substances according to claim 11, wherein in the step (2), before the hazardous chemical substance gas and/or steam in the hazardous chemical substance collecting tank enters the venturi generator cavity, a filter screen at the top of the hazardous chemical substance collecting tank can filter the hazardous chemical substance gas and/or steam, and an adsorption material in a pipeline between the hazardous chemical substance collecting tank and the venturi generator can adsorb the hazardous chemical substance gas and/or steam.

Description

Leakage dangerous chemical recycling system and recycling method Technical Field The invention relates to the technical field of dangerous goods leakage recovery, in particular to a leakage dangerous chemical recovery system and a recovery method. Background At present, a conveying pump or a fan is generally adopted as a power source for leakage recovery of dangerous chemicals, negative pressure is formed in the device, leaked dangerous chemicals are sucked into the device through a suction port and other parts, then the dangerous chemicals recovered into the device are subjected to gas, liquid and solid three-phase separation through gravity separation or membrane separation, and finally the gas is subjected to decontamination and filtration treatment and then is discharged, so that leakage recovery of the dangerous chemicals is realized. The separation and recovery method for the hazardous chemicals comprises the following steps of S1, primarily separating the water phase containing the hazardous chemicals from the water phase in a gravity separation mode, recovering the separated hazardous chemicals, S2, further separating the hazardous chemicals from the water phase separated in the S1 in a membrane separation mode and recovering the hazardous chemicals, and as disclosed in the Chinese patent CN108211526A, an emergency treatment system for hazardous chemicals leakage comprises a separation and collection section, a gas treatment section and an adsorption and discharge section, wherein the separation and collection section comprises a suction port, a gas-liquid-solid three-phase separator, a collection bin and a gas outlet, the suction port is connected with the gas-liquid-solid three-phase separator, the gas-liquid-solid three-phase separator is respectively connected with the collection bin and the gas outlet, the gas treatment section comprises a treatment agent bin, a gas decontamination bin, a condenser, a reprocessing bin and a demisting bin which are sequentially connected, the adsorption and discharge port, the separation and collection section comprises a cyclone liquid storage bin, an adsorption bin and a discharge port which are sequentially connected, and the adsorption and discharge section comprises the cyclone liquid storage bin and the adsorption and the demisting bin which are sequentially connected with the adsorption and the gas treatment bin. However, for recovery treatment of leakage hazardous chemicals with volatility and explosion risk, in the recovery process, hazardous chemicals are necessarily atomized and evaporated in the device, if hazardous chemical gas in the device is between the upper and lower explosion limits, once an ignition source is encountered, explosion can occur, and more serious accidents are caused. Disclosure of Invention In order to solve the technical problems, the invention provides a leakage hazardous chemical substance recovery system and a recovery method, which can enable hazardous chemical substance gas in a hazardous chemical substance collection box to be lower than the lower explosion limit, enable the inside of the hazardous chemical substance collection box to form an intrinsically safe environment, and prevent explosion in the hazardous chemical substance collection box. In order to achieve the above purpose, the technical solution adopted by the invention is as follows: The utility model provides a leakage hazardous chemical substance recovery system, includes hazardous chemical substance collecting box, venturi generator and is used for sucking the hazardous chemical substance to the suction tube in the hazardous chemical substance collecting box, one side of hazardous chemical substance collecting box is provided with the collecting box entry, the top of hazardous chemical substance collecting box is provided with the collecting box export, venturi generator passes through the collecting box export intercommunication at pipeline and hazardous chemical substance collecting box top, the suction tube communicates with the collecting box entry of hazardous chemical substance collecting box one side; The venturi generator comprises a venturi generator cavity, an air inlet pipe positioned at one side of the upper part of the venturi generator cavity and an air outlet pipe positioned at the other side of the upper part of the venturi generator cavity, and the central axis of the air inlet pipe and the central axis of the air outlet pipe are positioned on the same straight line; The inlet end of an air inlet pipe of the venturi generator is connected with a high-pressure inert gas cylinder, and the outlet end of the air inlet pipe is communicated with the cavity of the venturi generator; The inlet end of the exhaust pipe of the Venturi generator is communicated with the cavity of the Venturi generator, the outlet end of the exhaust pipe comprises a first exhaust outlet which is directly communicated with the atmospheric environment and a second exhaus