CN210765172U

CN210765172U - Coalescence dewatering device for liquefied gas

Info

Publication number: CN210765172U
Application number: CN201921860955.9U
Authority: CN
Inventors: 王杰; 杨永凯; 李占武
Original assignee: Ningxia Jinyuhai Chemical Co ltd
Current assignee: Ningxia Jinyuhai Chemical Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-06-16
Anticipated expiration: 2029-10-31

Abstract

The utility model provides a liquefied gas coalescence dewatering device belongs to petrochemical technical field. Including coalescence dehydrator body, drainage buffer memory jar and coalescence water collection tank, coalescence dehydrator body has the drain, is provided with buffer memory jar inlet tube and buffer memory jar outlet pipe on the drainage buffer memory jar, and buffer memory jar inlet tube intercommunication drain is provided with the buffer memory on the buffer memory jar outlet pipe and closes the valve. The coalescence water collection tank is arranged below the drainage buffer tank, a collection tank inlet pipe, a coalescence water outlet pipe and a diffused gas collection pipe are arranged on the coalescence water collection tank, the collection tank inlet pipe is connected with the buffer tank outlet pipe, and a drain valve is arranged on the coalescence water outlet pipe. After the liquefied gas is deeply dehydrated by the coalescence dehydrator body, coalescent water firstly passes through the drainage buffer tank, then enters the coalescence water collecting tank and is sent to the wastewater treatment device. The coalescence water collection tank is provided with the diffused gas collection pipe, the gathered volatile combustible gas is collected and processed in a centralized manner, the safety risk is reduced, and the potential safety hazard is eliminated.

Description

Coalescence dewatering device for liquefied gas

Technical Field

The utility model belongs to the technical field of petrochemical, concretely relates to liquefied gas coalescence dewatering device.

Background

The deep processing of the C4 includes alkylation, isomerization and MTBE (methyl tert-butyl ether) preparation processes, the water in the raw material can have fatal influence on the existing catalysts used in the isomerization process and the MTBE preparation process, so the raw material liquefied gas is deeply dehydrated before feeding, and the deep dehydration of the raw material liquefied gas is realized by adopting a coalescence dehydrator.

However, the flow rate of water removed from the liquefied gas raw material is limited, and the liquefied gas raw material contains part of volatile combustible gas, if the volatile combustible gas is directly conveyed to a wastewater storage tank or a wastewater treatment unit by using a pipeline, on one hand, the pipeline can only be arranged from high to low, and the outlet end is arranged at a lower position and is not suitable for being directly conveyed to the storage tank, and on the other hand, if the liquefied gas raw material is connected to a wastewater pool, a large amount of volatile combustible gas exists in the connecting pipe and at the outlet end of the connecting pipe, so that.

Disclosure of Invention

In view of this, the utility model provides a liquefied gas coalescence dewatering device to the coalescence dehydrator displacement that exists is little among the solution prior art, gathers easily volatile combustible gas in pipeline and outlet, exists the technical problem of potential safety hazard.

The utility model provides a technical scheme that its technical problem adopted is:

a liquefied gas coalescing dehydration apparatus comprising:

a coalescing dehydrator body having a drain outlet;

the drainage buffer tank is provided with a buffer tank inlet pipe and a buffer tank outlet pipe, the buffer tank inlet pipe is communicated with the sewage discharge outlet, and the buffer tank outlet pipe is provided with a buffer isolating valve; and

the coalescence water collection tank, the coalescence water collection tank set up in drainage buffer tank below, just be provided with collection tank inlet tube, coalescence water outlet pipe and diffuse gas collecting pipe on the coalescence water collection tank, collection tank inlet union coupling buffer tank outlet pipe, the entry end of coalescence water outlet pipe is close to the lower part of coalescence water collection tank, just set up the drain valve on the coalescence water outlet pipe, the entry end intercommunication of diffuse gas collecting pipe the upper portion of coalescence water collection tank.

Preferably, a shielding gas inlet pipe is further arranged on the coalescence water collection tank and is communicated with the upper part of the coalescence water collection tank.

Preferably, a pressure material purging pipe is arranged on the shielding gas inlet pipe in parallel, and the pressure material purging pipe is communicated with the upper part of the coalescence water collection tank.

Preferably, a liquid level controller is arranged on the coalescence water collection tank, and the liquid level controller is interlocked with the buffer closing valve and the drain valve.

Preferably, the outside of buffer tank inlet tube, drainage buffer tank, coalescence water collection tank, collection tank inlet tube and coalescence water outlet pipe is provided with the heat tracing subassembly, and the parcel has the heat preservation.

Preferably, a coalesced water sampling pipe is arranged on the drainage cache tank.

According to the above technical scheme, the utility model provides a liquefied gas coalescence dewatering device, its beneficial effect is: the coalescence dehydrator body the drain outlet department add the drainage buffer tank reaches the coalescence water collection tank, liquefied gas process after the coalescence dehydrator body degree of depth dehydration, the sewage that contains partial volatile combustible gas at first passes through the drainage buffer tank, later enters the coalescence water collection tank send waste water treatment device after gathering in the coalescence water collection tank. Set up the gas collecting pipe that diffuses on the coalescence water collection tank, make be little negative pressure state in the coalescence water collection tank, with will coalescence water collection tank gathers volatile combustible gas collects and centralized processing, reduces the safety risk, eliminates the potential safety hazard. This coalescence dewatering device flow is simple, and the pipeline distributes concentratedly, can prevent effectively that coalescence water and volatile combustible gas from detaining in the pipeline, reduces the safety risk.

Drawings

Fig. 1 is a schematic pipeline flow diagram of the liquefied gas coalescence-dehydration device.

In the figure: the device comprises a liquefied gas coalescing dehydration device 10, a coalescing dehydrator body 100, a drain outlet 110, a drainage buffer tank 200, a buffer tank inlet pipe 210, a buffer tank outlet pipe 220, a buffer closing valve 221, a coalesced water collecting tank 300, a collecting tank inlet pipe 310, a coalesced water outlet pipe 320, a drain valve 321, a diffused gas collecting pipe 330, a diffused gas valve 331, a shielding gas inlet pipe 340, a shielding gas valve 341, a material pressing purging pipe 350, a material pressing valve 351 and a liquid level controller 360.

Detailed Description

The following combines the drawings of the utility model to further elaborate the technical scheme and technical effect of the utility model.

Referring to fig. 1, in one embodiment, a liquefied gas coalescing dehydration apparatus 10 includes: coalescent dehydrator body 100, drainage buffer tank 200 and coalescent water collection tank 300, coalescent dehydrator body 100 has drain 110, be provided with buffer tank inlet tube 210 and buffer tank outlet pipe 220 on drainage buffer tank 200, buffer tank inlet tube 210 intercommunication drain 110, be provided with buffer block valve 221 on the buffer tank outlet pipe 220. The coalesced water collecting tank 300 is disposed below the drain buffer tank 200, the coalesced water collecting tank 300 is provided with a collecting tank inlet pipe 310, a coalesced water outlet pipe 320 and a diffused gas collecting pipe 330, the collecting tank inlet pipe 310 is connected with the buffer tank outlet pipe 220, the inlet end of the coalesced water outlet pipe 320 is close to the lower part of the coalesced water collecting tank 300, the coalesced water outlet pipe 320 is provided with a drain valve 321, and the inlet end of the diffused gas collecting pipe 330 is communicated with the upper part of the coalesced water collecting tank 300.

After the liquefied gas is deeply dehydrated through the coalescing dehydrator body 100, the generated coalesced water is discharged through the drain outlet 110, passes through the drain buffer tank 200, and is finally collected by the coalesced water collecting tank 300. In the process, the valve opening of the buffer closing valve 221 is controlled to maintain a certain liquid level in the drain buffer tank 200 to keep the outlet pipe 220 and the inlet pipe 310 full of coalesced water, thereby preventing the volatile combustible gas from accumulating in the pipeline. The volatile combustible gas collected in the coalescing water collection tank 300 is discharged and centrally treated through the diffused gas collection pipe 330 by the diffused gas collection pipe 330. When the level of the coalesced water collection tank 300 reaches a preset value, the coalesced water collected in the coalesced water collection tank 300 is transferred to a wastewater storage tank or a wastewater disposal unit.

Further, for further reducing volatile combustible gas the safety risk of coalescence in the coalescence water collection tank 300 eliminates the potential safety hazard, still be provided with protective gas inlet tube 340 on the coalescence water collection tank 300, protective gas inlet tube 340 intercommunication the upper portion of coalescence water collection tank 300. An inert gas, preferably industrial nitrogen, is introduced into the shielding gas inlet pipe 340 to displace and discharge the volatile combustible gas in the coalescing water collection tank 300 into the purge gas collection pipe 330.

Further, a material pressing purge pipe 350 is connected in parallel to the shielding gas inlet pipe 340, and the material pressing purge pipe 350 is communicated with the upper part of the coalescence water collection tank 300. Under a normal state, the material pressing valve 351 on the material pressing purging pipe 350 is closed, and the protective gas valve 341 on the protective gas inlet pipe 340 is kept at a certain opening degree, so that the volatile combustible gas is replaced. When the liquid level of the coalesced water collecting tank 300 reaches a preset value and drainage is required, the purge gas valve 331 of the purge gas collecting pipe 330 and the buffer closing valve 221 are closed, the drain valve 321 and the pressure valve 351 are opened, inert gas is introduced into the coalesced water collecting tank 300, and coalesced water is conveyed to a waste water storage tank or a waste water disposal unit under the pressure. During pressing, the generated coalesced water is temporarily stored in the drain buffer tank 200, and after pressing is finished, the coalesced water collection state is recovered.

Further, a liquid level controller 360 is arranged on the coalesced water collecting tank 300, and the liquid level controller 360 is interlocked with the buffer closing valve 221 and the drain valve 321, preferably also with the pressure material valve 351 and the bleeding gas valve 331, so as to automatically control the opening and closing states of the buffer closing valve 221, the drain valve 321, the pressure material valve 351 and the bleeding gas valve 331 when drainage is required or closed, thereby realizing automatic production.

The interlock is to provide a central control device, such as a DCS control system or a PLC controller, to automatically control the open/close states of the buffer closing valve 221, the drain valve 321, the pressure valve 351, and the bleed valve 331 through the input of the level controller 360. Are within the general knowledge of those skilled in the art and will not be described in detail.

Furthermore, the buffer tank inlet pipe 210, the drainage buffer tank 200, the coalesced water collecting tank 300, the collecting tank inlet pipe 310 and the coalesced water outlet pipe 320 are provided with heat tracing components on the outer sides thereof, and are wrapped with heat insulating layers, so as to prevent the pipelines from being frozen and blocked after the temperature of the pipeline is reduced in winter.

Further, a coalesced water sample pipe 230 is disposed on the drainage buffer tank 200 to collect a coalesced water sample through the drainage buffer tank 200, and determine the operation state of the coalesced dehydrator body 100. During sampling, the coalesced water in the drainage buffer tank 200 can be repeatedly discharged or collected by opening and closing the buffer closing valve 221 so as to take a real-time sample and improve the judgment accuracy.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A liquefied gas coalescence dewatering device, comprising:

a coalescing dehydrator body having a drain outlet;

2. The liquefied gas coalescing and dehydrating apparatus of claim 1, wherein a shielding gas inlet pipe is further provided on the coalescing water collection tank, and the shielding gas inlet pipe communicates with an upper portion of the coalescing water collection tank.

3. The liquefied gas coalescence dewatering device of claim 2, wherein a material pressing purging pipe is arranged on the shielding gas inlet pipe in parallel, and the material pressing purging pipe is communicated with the upper part of the coalescence water collection tank.

4. The liquefied gas coalescing and dehydrating apparatus of claim 1, wherein a level controller is provided on the coalescing water collection tank, the level controller being interlocked with the buffer block valve and with the drain valve.

5. The liquefied gas coalescing and dehydrating device of claim 1, wherein the inlet pipe of the buffer tank, the drain buffer tank, the coalesced water collecting tank, the inlet pipe of the collecting tank and the coalesced water outlet pipe are provided with heat tracing components outside and wrapped with an insulating layer.

6. The liquefied gas coalescing and dehydrating apparatus of claim 1, wherein the drain buffer tank is provided with a coalesced water sampling pipe.