CN217017700U

CN217017700U - Feed pump plunger rinse-system

Info

Publication number: CN217017700U
Application number: CN202121302439.1U
Authority: CN
Inventors: 司孝锋; 傅江东
Original assignee: Chongqing Jianfeng New Material Co Ltd
Current assignee: Chongqing Jianfeng New Material Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-07-22
Anticipated expiration: 2031-06-09

Abstract

The utility model provides a feeding pump plunger flushing system which comprises a flushing fluid storage tank, a heat exchanger and a supercharging device, wherein the flushing fluid storage tank is connected with the heat exchanger through a pipeline, and an initial flushing fluid inlet is formed in a liquid inlet end of the heat exchanger; the flushing liquid storage tank bottom liquid outlet with supercharging device's the end of advancing passes through the pipe connection, flushing liquid storage tank liquid outlet end is equipped with the flushing liquid outlet, supercharging device's the exit end with flushing liquid outlet pipe connection, be equipped with the flushing liquid on the flushing liquid storage tank and return the import. Adopt this rinse-system not only can ensure the continuous supply of flush fluid, effectively improve the life that BYD feed pump packed, still solved traditional flush fluid and polluted the back and can not recycle by the flush fluid that leaks, can only regard as harmful waste liquid treatment's problem, reach recycle and zero release's purpose.

Description

Feed pump plunger rinse-system

Technical Field

The utility model relates to the technical field of plunger washing of reciprocating pumps, in particular to a feeding pump plunger washing system.

Background

The BDO production device synthesizes 1.4-butanediol by high-pressure hydrogenation of Butynediol (BYD) under the action of a catalystDiol (BDO). In the production link, a BYD feed pump (BS-P8201A/B) sends material BYD butynediol to a hydrogenation reactor (R8201) for hydrogenation synthesis reaction. IN the traditional process, a plunger of a high-pressure reciprocating pump is lubricated by thin oil with corresponding viscosity, but mineral oil cannot enter a process medium due to special requirements of a BDO production process, so that desalted water or condensate (with the pressure of 0.8MpaG and the temperature of 35/50IN/OUT) is originally designed for flushing, cooling and lubricating the plunger by a BYD feeding pump, but IN use, a plurality of problems exist, for example, the amount of the steam condensate flushed IN actual operation is more than 0.5m³The temperature of the filler can be reduced; because the flushing liquid is polluted by materials leaked from the main filler, the flushing liquid can be only collected and treated in a centralized and harmless manner, and the operation cost of the device is increased; the lubricity of the steam condensate on the plunger is far lower than that of the steam condensate on the mineral oil, and the plunger and the filler are seriously damaged due to more friction heat generated in the operation process due to large friction coefficient; after the filler is seriously abraded due to the washing problem, the filler fiber often blocks a washing pipeline, so that other washing pipelines are cut off, and the filler of the whole equipment is burnt. Therefore, there is a need to find better technical methods to ensure better operation of the BYD feed pump plungers.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a feeding pump plunger flushing system, which overcomes the defects of the flushing liquid in the original design, can effectively reduce the friction heat of a filler and a plunger, and prolongs the service life of the filler and the plunger.

According to the embodiment of the utility model, the feeding pump plunger flushing system comprises a flushing liquid storage tank, a heat exchanger and a supercharging device, wherein the flushing liquid storage tank is connected with the heat exchanger through a pipeline, and an initial flushing liquid inlet is formed in the liquid inlet end of the heat exchanger; the flushing liquid storage tank bottom liquid outlet with supercharging device's the end of advancing passes through the pipe connection, flushing liquid storage tank liquid outlet end is equipped with the flushing liquid outlet, supercharging device's the exit end with flushing liquid outlet pipe connection, be equipped with the flushing liquid on the flushing liquid storage tank and return the import.

Furthermore, a material recycling port used for being connected with external equipment is arranged on a pipeline at the outlet end of the pressurizing device, and a switch valve is arranged between the material recycling port and the outlet end of the pressurizing device.

Further, supercharging device includes washing liquid circulating pump and pressure transmitter, the end that advances of washing liquid circulating pump pass through the pipeline with washing liquid storage tank bottom liquid outlet is connected, the outlet end of washing liquid circulating pump is connected on the pipeline between adjusting valve and washing liquid outlet, pressure transmitter installs on the pipeline between the outlet end of washing liquid circulating pump and washing liquid outlet, pressure transmitter is used for the controller that opens and shuts to the washing liquid circulating pump with pressure signal transmission.

Furthermore, a regulating valve is arranged on a pipeline between the flushing liquid outlet and the flushing liquid storage tank outlet end.

Furthermore, the flush fluid circulating pump is two, two flush fluid circulating pumps advance the end parallelly connected back through the pipeline with flush fluid storage tank bottom liquid outlet is connected, connects on the pipeline between adjusting valve and flush fluid liquid outlet after the parallelly connected back in output of two flush fluid circulating pumps.

Further, the material recycling port can be externally connected with a material recycling device.

Furthermore, a cooling coil is arranged in the flushing liquid storage tank.

Furthermore, a nitrogen inlet is arranged at the liquid inlet end of the flushing liquid storage tank.

Furthermore, the flushing liquid storage tank is provided with a cooling water inlet and a cooling water outlet, the cooling water inlet is connected with the cooling coil water inlet end through a pipeline, and the cooling water outlet is connected with the cooling coil water outlet end through a pipeline.

Furthermore, the flushing system adopts BDO and BYD as flushing liquid.

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

through setting up supercharging device, flush fluid storage tank and supercharging device pipe connection, supercharging device and flush fluid liquid outlet pipe connection, flush fluid storage tank goes out the liquid end and is equipped with the flush fluid and returns the import, the flush fluid returns import and main pump flush fluid outlet pipe connection. Not only provides BDO washing unit, has still ensured the continuous supply and cyclic utilization of washing liquid. Still solved traditional flush fluid and polluted the back and can not recycle by the BYD who leaks, can only regard as the problem of harmful waste liquid treatment, reached recycle and zero release's purpose.

Drawings

Fig. 1 is a schematic structural diagram of a plunger flushing system of a BYD feed pump according to an embodiment of the utility model.

FIG. 2 is a schematic diagram of a BYD feed pump according to an embodiment of the utility model.

In the drawings, wherein: 1. a BYD feed pump main pump; 2. washing the filter by 100 meshes; 3. a main pump flushing fluid inlet; 4. a main pump flushing fluid outlet; 5. a main pump inlet filter; 6. a flushing liquid storage tank; 7. a heat exchanger; 8. a pressure boosting device; 9. an initial rinse inlet; 10. a flushing liquid outlet; 11. flushing liquid returns to the inlet; 12. adjusting the valve; 13. an on-off valve; 14. A material recovery port; 15. a cooling coil; 16. a nitrogen inlet; 17. a cooling water inlet; 18. a cooling water outlet; 81. a washing liquid circulating pump; 82. and a pressure transmitter.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments. As shown in fig. 1-2, an embodiment of the present invention provides a BYD feed pump plunger flushing system, which includes a flushing liquid storage tank 6, a heat exchanger 7, and a supercharging device 8, where the flushing liquid storage tank 6 is connected to the heat exchanger 7 through a pipeline, and an initial flushing liquid inlet 9 is arranged at a liquid inlet of the heat exchanger 7; a liquid outlet at the bottom of the flushing liquid storage tank 6 is connected with the inlet end of the supercharging device 8 through a pipeline, a flushing liquid outlet 10 is arranged at the liquid outlet end of the flushing liquid storage tank 6, the outlet end of the supercharging device 8 is connected with the flushing liquid outlet 10 through a pipeline, and a flushing liquid return inlet 11 is arranged on the flushing liquid storage tank 6; a material recovery port 14 for connecting external equipment is arranged on a pipeline at the outlet end of the supercharging device 8, and a switch valve 13 is arranged between the material recovery port 14 and the outlet end of the supercharging device 8; the supercharging device 8 comprises a washing liquid circulating pump 81 and a pressure transmitter 82, the inlet end of the washing liquid circulating pump 81 is connected with a liquid outlet at the bottom of the washing liquid storage tank 6 through a pipeline, the outlet end of the washing liquid circulating pump 81 is connected to a pipeline between the switch valve 13 and the washing liquid outlet 10, the pressure transmitter 82 is installed on a pipeline between the outlet end of the washing liquid circulating pump 81 and the washing liquid outlet 10, and the pressure transmitter 82 is used for transmitting a pressure signal to a start-stop controller of the washing liquid circulating pump 81; a regulating valve 12 is arranged on a pipeline between the flushing liquid outlet 10 and the liquid outlet end of the flushing liquid storage tank 6; the number of the flushing liquid circulating pumps 81 is two, the inlet ends of the two flushing liquid circulating pumps 81 are connected in parallel and then connected with the liquid outlet at the bottom of the flushing liquid storage tank 6 through a pipeline, and the outlet ends of the two flushing liquid circulating pumps 81 are connected in parallel and then connected with the pipeline between the regulating valve 12 and the flushing liquid outlet 10; a cooling coil 15 is arranged in the flushing liquid storage tank 6; a nitrogen inlet 16 is formed at the liquid inlet end of the flushing liquid storage tank 6; the flushing liquid storage tank 6 is provided with a cooling water inlet 17 and a cooling water outlet 18, the cooling water inlet 17 is connected with a water inlet end pipeline of the cooling coil 15, and the cooling water outlet 18 is connected with a water outlet end pipeline of the cooling coil 15; the flushing system adopts BDO and BYD flushing fluid.

The working principle of the embodiment is as follows: BDO as initial flushing liquid enters from an initial flushing liquid inlet 9, the BDO enters a flushing liquid storage tank 6 after being cooled by a heat exchanger 7, the interior of the flushing liquid storage tank 6 is cooled by a cooling coil 15, then the BDO flows out of a flushing liquid outlet 10 through a pipeline of a supercharging device 8 to a flushing liquid inlet 3 of a BYD feeding pump main pump 1, the BDO is filtered by a 100-mesh flushing filter 2 and then is flushed, the BDO flows out of a flushing liquid outlet 4 of the BYD feeding pump main pump 1 after being flushed, then the BDO returns to a flushing liquid inlet 11 and returns to the flushing liquid storage tank 6, and the interior of a return pipeline is at normal pressure; when the pressure of the discharged liquid is low, the pressure transmitter 82 obtains the pressure of the washing liquid outlet 10 and transmits the pressure to the controller, when the obtained pressure value is smaller than the preset pressure value, the controller can start the pressurizing device 8 to ensure that the washing pressure meets the requirement, the controller can be realized by the prior art (the pressure value obtained by the pressure transmitter 82 can be divided into two conditions, one is that the obtained pressure value is lower than the preset pressure value, the controller only starts one washing liquid circulating pump 81, and the other is that the pressure value obtained by the pressure transmitter 82 is far lower than the preset pressure value, when one washing liquid circulating pump 81 can not meet the increasing requirement of the washing liquid outlet 10, the controller can start the other washing liquid circulating pump 81 through an automatic control device), and simultaneously, the regulating valve 12 can be manually regulated to cooperate with the regulation of the liquid discharging pressure to ensure the continuous supply of the washing liquid, the regulating valve 12 is in a closed state or a small opening state in normal operation; during the flushing process, cooling water enters the cooling coil 15 from the cooling water inlet 17 and flows out from the water outlet end of the cooling coil 15. When the liquid level of the flushing liquid storage tank 6 is high, the switch valve 13 between the supercharging device 8 and the material recovery port 14 is opened (normally, in a closed state), a small part of flushing liquid flows into the inlet filter 5 of the BYD feed pump main pump 1 through the material recovery port 14 to be recovered to a production system, and the flushing liquid is replaced through the initial flushing liquid on line. The pipe diameter of the recovery pipeline is very small, so that the pressure of the liquid outlet pipeline cannot fluctuate greatly. At the same time, nitrogen gas is introduced through the nitrogen inlet 16 to protect the media from oxidation.

Because the supercharging device 8, the regulating valve 12 and the pressure transmitter 82 are arranged, when the pressure of the flushing liquid is low, the standby circulating pump is started, and the uninterrupted supply of the flushing liquid can still be ensured; because set up material recovery mouth 14, material recovery mouth 14 and 5 pipeline connections of main pump import filter have guaranteed the environmental protection requirement of recycle and the flush fluid of material.

In addition, it should be noted that the feeding pump plunger flushing system provided by the utility model is not limited to the use of BDO flushing liquid, and can also be applied to other similar flushing fields according to actual working conditions.

In some applications, BDO (1.4 butanediol with fresh BDO content of 45-55 percent and temperature of 90-110 ℃) from a device T8201 is selected as initial flushing liquid, the temperature is reduced to 20-40 ℃ through a heat exchanger 7, and a flushing liquid storage tank 6 (with volume of 2 m) is used³) Replenishing to 50% of liquid level, then discharging through a washing liquid outlet 10, conveying to a main pump through a washing liquid inlet 3 of a BYD feeding pump main pump 1, and returning the washing liquid flowing out of a washing liquid outlet 4 of the BYD feeding pump main pump 1 to a washing liquid storage tank 6 through a washing liquid return inlet 11; when the pressure is low, the supercharging device 8 (road)Centrifugal pump flow 4m³H, head 80 m). Adopt cooling coil 15 to cool down in the flushing liquid storage tank 6, the temperature is controlled at 20-40 ℃ all the time, and the circulation liquid gets into the import filter 5(F8201A/B) of BYD feed pump main pump 1 through material recovery mouth 14, retrieves production system to on-line replacement of flushing liquid is carried out through the initial flushing liquid.

The BDO produced at the rear end of the process device is used as a main lubricating medium, and the requirements of the process and equipment are met; the flushing operation cost is directly reduced, the service life of the filler and the plunger is effectively prolonged, and the equipment maintenance cost is reduced; the device parking loss caused by filler replacement is reduced; the pollution to the environment caused by pollutant discharge is avoided. The utility model adopts BDO (physical and chemical properties are shown in table 1) as a lubricating medium, the lubricating property of the BDO is close to that of common mineral oil at the temperature of 20-60 ℃, and simultaneously meets the requirements of the process and equipment, and by adopting the flushing fluid system, the service life of the filler can be effectively prolonged, the maintenance cost of the equipment is reduced (the economic benefit is measured and calculated as shown in table 2), and the parking loss of the device caused by the replacement of the filler is also reduced; the pollution to the environment caused by pollutant discharge is avoided.

epi-BDO physicochemical Properties

Economic benefit measurement and calculation of secondary economic benefit

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The feed pump plunger flushing system is characterized by comprising a flushing liquid storage tank (6), a heat exchanger (7) and a supercharging device (8), wherein the flushing liquid storage tank (6) is in pipeline connection with the heat exchanger (7), and an initial flushing liquid inlet (9) is formed in a liquid inlet end of the heat exchanger (7); flushing fluid storage tank (6) bottom liquid outlet with advancing of supercharging device (8) end passes through the pipe connection, flushing fluid storage tank (6) goes out the liquid end and is equipped with flushing fluid liquid outlet (10), the play end of supercharging device (8) with flushing fluid liquid outlet (10) pipe connection, be equipped with the flushing fluid on flushing fluid storage tank (6) and return import (11).

2. A feed pump plunger flushing system according to claim 1, characterized in that a material recovery port (14) for connection to external equipment is provided in the line at the outlet of the pressurizing means (8), and a switch valve (13) is provided between the material recovery port (14) and the outlet of the pressurizing means (8).

3. A feed pump plunger washing system according to claim 2, characterized in that supercharging device (8) includes flushing liquid circulating pump (81) and pressure transmitter (82), the end of entry of flushing liquid circulating pump (81) through the pipeline with flushing liquid storage tank (6) bottom liquid outlet is connected, the outlet of flushing liquid circulating pump (81) is connected on the pipeline between ooff valve (13) and flushing liquid outlet (10), pressure transmitter (82) is installed on the pipeline between the outlet of flushing liquid circulating pump (81) and flushing liquid outlet (10), pressure transmitter (82) is used for transmitting pressure signal to the controller of flushing liquid circulating pump (81).

4. A feed pump plunger flushing system as claimed in claim 3, characterized in that a regulating valve (12) is provided in the line between the flushing liquid outlet (10) and the outlet side of the flushing liquid tank (6).

5. A feed pump plunger flushing system as claimed in claim 4, characterized in that there are two flushing liquid circulation pumps (81), the inlets of the two flushing liquid circulation pumps (81) being connected in parallel and then connected via a pipeline to the outlet at the bottom of the flushing liquid storage tank (6), and the outlets of the two flushing liquid circulation pumps (81) being connected in parallel and then connected to the pipeline between the regulating valve (12) and the flushing liquid outlet (10).

6. A feed pump plunger flushing system according to claim 1, c h a r a c t e r i z e d in that a cooling coil (15) is provided in the flushing liquid storage tank (6).

7. A feed pump plunger flushing system as claimed in claim 1, characterized in that the flushing liquid tank (6) is provided with a nitrogen inlet (16) at its inlet end.

8. A feed pump plunger flushing system according to claim 6, characterized in that the flushing-liquid storage tank (6) is provided with a cooling-water inlet (17) and a cooling-water outlet (18), the cooling-water inlet (17) being in line connection with the cooling coil (15) at its water inlet end, the cooling-water outlet (18) being in line connection with the cooling coil (15) at its water outlet end.

9. A feed pump plunger flushing system as claimed in any one of claims 1 to 8, characterized in that the flushing system uses BDO and BYD as flushing fluid.