CN219290699U

CN219290699U - LPG self-circulation airtight continuous water cutting system

Info

Publication number: CN219290699U
Application number: CN202223497975.9U
Authority: CN
Inventors: 郑德成; 李福临; 赵勇; 韩荣贤; 张强; 宋亦伟
Original assignee: China Petroleum and Chemical Corp; Sinopec Qingdao Petrochemical Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Qingdao Petrochemical Co Ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-07-04
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses an LPG self-circulation airtight continuous water cutting system, which belongs to the field of petroleum processing and aims to solve the problem that the prior art is difficult to treat disulfide-containing wastewater. It mainly includes sand filter tower and washing jar, be equipped with the drain line on the sand filter tower, the drain line include drain valve I and drain valve II, drain valve I is connected with drain valve II, washing jar connects static mixer, static mixer connect self-circulation waterline, self-circulation waterline includes water valve I and water valve II that adds, the one end of water line is cut in the water pipe upper branch between drain valve I and drain valve II, the other end of water line is cut and is connected on the water pipe between water valve I and water valve II that adds. The sand filter tower is communicated with the water washing tank through the water cutting line, and the self-circulation airtight continuous water cutting can be completed without external power by means of negative pressure operation formed by pressure drop of the system and original equipment.

Description

LPG self-circulation airtight continuous water cutting system

Technical Field

The utility model relates to the field of petroleum processing, in particular to an LPG self-circulation airtight continuous water cutting system.

Background

In the catalytic cracking device in the petroleum processing field, after the LPG is desulfurized and is subjected to mercaptan removal, the LPG is subjected to water washing, filtered and settled and then conveyed to a downstream device for reprocessing, in order to ensure that no impact is caused to the downstream device, the filtered and settled disulfide-containing wastewater is required to be drained periodically, water is cut once about every 12 hours, the water is always cut to operate in a traditional manual field emptying mode, and is directly discharged into a sewage pipe network, because the water is not cut in a closed mode, and a valve is required to be frequently opened and closed manually, when the water is cut, the field discharged wastewater rich in combustible hydrocarbon and disulfide and the malodorous smell are serious, and the LDRA detection in a discharge area is serious. At present, a plurality of enterprises adopt the traditional manual on-site water cutting method, and no good solution is available.

Disclosure of Invention

The utility model aims to provide an LPG self-circulation airtight continuous water cutting system so as to solve the problem of water cutting on an artificial site in the prior art.

The utility model is realized by the following technical scheme:

the utility model provides a LPG self-circulation airtight continuous water cutting system, includes sand filter tower and washing jar, be equipped with the drain line on the sand filter tower, the drain line include drain valve I and drain valve II, drain valve I pass through water piping connection with drain valve II, the washing jar is connected static mixer, the manometer is connected at static mixer both ends, static mixer connect self-circulation waterline, self-circulation waterline includes the waterline of moving back, adds waterline, circulation way valve I and circulation way valve II, add the waterline and include water valve I and water valve II that adds, the waterline of moving back is connected with the dehydration package on the washing jar, water valve I and water valve II pass through water piping connection; one end of a water cutting line is connected to the water pipe between the emptying valve I and the emptying valve II in a tapping way, and the other end of the water cutting line is connected to the water pipe between the water adding valve I and the water adding valve II.

Further, the water cutting line on still be equipped with restriction orifice plate and cut water valve, steady flow that can be better, newly increase and cut water line and valve on increase the heat preservation, the heat preservation is equipped with aluminium alloy protective layer, prevent heat loss, can prevent frostbite and prevent congealing winter.

Further, the water cutting valve comprises a water cutting valve I, a water cutting valve II and a water cutting circulating pipe, wherein the water cutting valve I is arranged at the junction of the emptying line, and the water cutting valve II is arranged at the junction of the water adding line, so that emergency cutting is facilitated.

Further, the water cutting valve I and the water cutting valve II adopt direct-current stop valves.

Further, the two ends of the static mixer are connected with pressure gauges.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the LPG sand filter tower is communicated with the LPG water washing tank through the water cutting line, and the self-circulation airtight continuous water cutting can be completed without external power by means of negative pressure operation formed by pressure drop of the system and original equipment.

2. The flow-limiting pore plate is arranged in front of the water cutting valve, so that the flow can be better controlled; the novel heat preservation measures are increased and decreased on the newly added water cutting pipeline and the valve, an aluminum alloy protection layer is additionally added for heat preservation, heat loss is prevented, and the anti-freezing and anti-coagulation effects can be realized in winter.

3. The utility model has simple operation, reduces labor cost, improves working efficiency, prevents on-site emission from polluting the environment, and is safe and reliable.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure: 1. a sand filtering tower; 2. a vent valve I; 3. a blow-down valve II; 4. a water cutting valve I; 5. a water cutting valve II; 6. a water adding valve I; 7. a water adding valve II; 8. cutting a waterline; 9. a static mixer; 10. a pressure gauge; 11. a water washing tank; 12. a dehydration bag; 13. a water return valve; 14. self-circulating waterline; 15. a circulation valve I; 16. a circulation valve II; 17. a restrictor orifice plate.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The embodiment 1, an LPG self-circulation airtight continuous water cutting system, as shown in figure 1, comprises a sand filter tower 1 and a water washing tank 11, wherein a vent line is arranged on the sand filter tower 1, the vent line comprises a vent valve I2 and a vent valve II 3, the vent valve I2 is connected with the vent valve II 3 through a water pipe, the water washing tank 11 is connected with a static mixer 9, two ends of the static mixer 9 are respectively provided with a pressure gauge 10 and a cut-off valve, and the pressure gauge 10 monitors the pressure condition of a waterline at any time; the static mixer 9 is connected with the self-circulation waterline 14, the self-circulation waterline 14 comprises a waterline withdrawal, a waterline adding and circulating channel valve I15 and a circulating channel valve II 16, one end of the circulating channel valve I15 is connected with the static mixer 9, and the other end is connected with the waterline adding; one end of the circulating channel valve II 16 is connected with a water adding line, and the other end is connected with a water withdrawing line; the water adding line comprises a water adding valve I6 and a water adding valve II 7, the water removing line is connected with a dewatering bag 12 on the water washing tank 11, the water removing line comprises a water removing valve 13, the water removing valve 13 is connected with the circulating valve through a water pipe, a cut-off valve is arranged on the water pipe between the water removing valve 13 and the circulating valve, the water adding valve I6 is connected with the circulating valve through a water pipe, and the water adding valve I6 is connected with the water adding valve II 7 through a water pipe; one end of a water cutting line 8 is connected to the water pipe between the emptying valve I2 and the emptying valve II 3, and the other end of the water cutting line 8 is connected to the water pipe between the water adding valve I6 and the water adding valve II 7. The sand filter tower 1 is communicated with the water washing tank 11 by the water cutting line 8, and the self-circulation airtight continuous water cutting can be completed without external power by means of negative pressure operation formed by pressure drop of the system and original equipment.

In the embodiment 2, as shown in fig. 1, the water cutting line is also provided with a current limiting pore plate and a water cutting valve, so that the flow can be stabilized better, the newly added water cutting line and valve are additionally provided with a heat insulation layer, and an aluminum alloy protection layer is arranged outside the heat insulation layer to prevent heat loss and prevent freezing and coagulation in winter; the water cutting valve comprises a water cutting valve I4, a water cutting valve II 5 and a water cutting circulating pipe, wherein the water cutting valve I4 and the water cutting valve II 5 are respectively arranged at two sides of the water cutting circulating pipe; the water cutting valve I4 and the water cutting valve II 5 adopt direct-current stop valves; the two ends of the static mixer 9 are connected with pressure gauges 10; the other steps are the same as in example 1.

When the LPG self-circulation closed continuous water cutting system is used, the LPG sand filter tower 1 and the LPG water washing tank 11 normally circulate, the water washing static mixer 9 normally operates, the pressure gauge 10 is normal before and after the static mixer 9, the control of the water washing circulation path valve II 16 is slowly changed into the control of the water washing circulation path valve I15, the purpose is to reduce the pressure drop at the inlet of the static mixer 9 by utilizing the pressure difference before and after the flow orifice plate of the circulating water quantity, water enters the static mixer 9, and the joint of the newly added water cutting line 8 forms a negative pressure zone under the action of the LPG circulation quantity. When the automatic water cutting system is put into operation, the newly added emptying valve II 3 is firstly checked to be in a closed state, then the emptying valve I2, the water cutting valve I4, the water cutting valve II 5 and the water adding valve I6 are sequentially opened, and the valves are opened to the maximum, so that the pressure drop of the system is reduced, the water cutting system is ensured to run normally, and at the moment, the automatic water cutting system is put into operation, and the water cutting flow is fixedly controlled by the flow limiting pore plate 17. The utility model does not need any power, and realizes self-circulation airtight continuous water cutting by means of pressure drop of the system and negative pressure operation formed by original equipment.

Claims

1. The utility model provides a LPG self-loopa airtight continuous water cutting system, includes sand filtration tower (1) and wash tank (11), its characterized in that: the sand filtering tower (1) is provided with a vent line, the vent line comprises a vent valve I (2) and a vent valve II (3), the vent valve I (2) is connected with the vent valve II (3) through a water pipe, the water washing tank (11) is connected with the static mixer (9), the static mixer (9) is connected with the self-circulation water line (14), the self-circulation water line (14) comprises a water adding line, the water adding line comprises a water adding valve I (6) and a water adding valve II (7), and the water adding valve I (6) is connected with the water adding valve II (7) through a water pipe; one end of a water cutting line (8) is connected to the water pipe between the emptying valve I (2) and the emptying valve II (3), and the other end of the water cutting line (8) is connected to the water pipe between the water adding valve I (6) and the water adding valve II (7).

2. The LPG self-circulation closed continuous water cutting system according to claim 1, characterized in that: the water cutting line (8) is also provided with a current limiting pore plate and a water cutting valve, the water cutting valve is provided with a heat insulation layer, and an aluminum alloy protection layer is arranged outside the heat insulation layer.

3. The LPG self-circulation closed continuous water cutting system according to claim 2, characterized in that: the water cutting valve comprises a water cutting valve I (4), a water cutting valve II (5) and a water cutting circulating pipe, wherein the water cutting valve I (4) and the water cutting valve II (5) are respectively arranged at two sides of the water cutting circulating pipe.

4. The LPG self-circulation closed continuous water cutting system according to claim 3, characterized in that: the water cutting valve I (4) and the water cutting valve II (5) adopt direct-current stop valves.

5. The LPG self-circulation closed continuous water cutting system according to claim 1, characterized in that: and two ends of the static mixer (9) are connected with pressure gauges (10).