Vacuum pump cooling water closed circulating cooling device

Abstract

The utility model relates to the technical field of vacuum pump cooling devices, in particular to a vacuum pump cooling water closed type circulating cooling device which comprises a storage tank, a plate heat exchanger set and a vacuum pump, the storage tank is fixedly communicated with a desalted water replenishing pipeline, and the bottom of the storage tank is fixedly communicated with a tube pass inlet of the plate heat exchanger set through a desalted water pipeline. A tube pass outlet of the plate heat exchanger set is fixedly communicated with the cooling water inlet end of the vacuum pump through a cooling water pipeline. Desalted water is used as a heat exchange medium of a tube pass of the plate heat exchanger group, so that the scaling and blocking frequency of a heat exchange tube of the plate heat exchanger group is obviously reduced; the desalted water after the vacuum pump is cooled can be recycled to the storage tank and is recycled, so that the stable operation of the vacuum pump is ensured; in addition, the device adopts a closed circulation mode, so that impurities in the environment are prevented from entering the desalted water, and the purity of the desalted water is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pump cooling devices, and is a closed-circuit circulating cooling device for the cooling water of a vacuum pump. Background Technique

[0002] At present, most chemical processes involve vacuum systems. When it comes to vacuum systems, vacuum pumps are required. A vacuum pump is a vacuum acquisition device. After a long period of development, there are many types and application fields of vacuum pumps. Each vacuum pump has different advantages, characteristics and performances. Enterprises using them need to consider how to select a vacuum pump according to factors such as their respective operating conditions and vacuum degree requirements.

[0003] The currently used Roots vacuum pump has the advantages of fast startup, low power consumption, large pumping speed, etc. It can pump out gases containing water vapor and dust, and can quickly pump out suddenly released gases. Using a Roots vacuum pump can reduce the pumping time and improve production efficiency. The dry screw vacuum pump is a relatively new vacuum acquisition device, which has the characteristics of high reliability, long service life, good dynamic balance performance, strong adaptability, and can perform multi-phase mixed transportation. It can pump out various gases such as corrosive, toxic, dust-containing gases and condensable vapors.

[0004] Most of the currently used vacuum pump devices require a cooling medium to reduce the temperature of the pump body. Generally, for convenience, circulating water is directly used as the cooling medium. Since the diameter of the heat exchange tubes in the tube side of the heat exchanger is small, when circulating water is used as the cooling medium, the circulating water is prone to scale and blockage in the heat exchange tubes of the heat exchanger, which is not conducive to the stable operation of the equipment. Summary of the Invention

[0005] The utility model provides a closed-circuit circulating cooling device for the cooling water of a vacuum pump, which overcomes the above-mentioned deficiencies of the prior art and significantly reduces the frequency of scale and blockage inside the heat exchange tubes of the heat exchanger.

[0006] The technical solution of the utility model is realized by the following measures: a closed-circuit circulating cooling device for the cooling water of a vacuum pump, which includes a storage tank, a plate heat exchanger group and a vacuum pump. A desalted water make-up pipeline is fixedly connected to the storage tank. The bottom of the storage tank is fixedly connected to the tube side inlet of the plate heat exchanger group through a desalted water pipeline. The tube side outlet of the plate heat exchanger group is fixedly connected to the cooling water inlet end of the vacuum pump through a cooling water pipeline. The shell side inlet of the plate heat exchanger group is fixedly connected to a circulating water inlet pipeline. The shell side outlet of the plate heat exchanger group is fixedly connected to a circulating water recovery pipeline. The cooling water outlet end of the vacuum pump is fixedly connected to the storage tank through a return water pipeline. A water transfer pump is fixedly installed on the desalted water pipeline.

[0007] The following is a further optimization and / or improvement of the above-mentioned invention technical solution:

[0008] The above-mentioned plate heat exchanger group includes at least two plate heat exchangers, which are connected in parallel with each other. The shell-side inlet of each plate heat exchanger is fixedly connected to the circulating water inlet pipeline, and the shell-side outlet of each plate heat exchanger is fixedly connected to the circulating water recovery pipeline. The bottom of the storage tank and the tube-side inlet of each plate heat exchanger are fixedly connected to the desalinated water pipeline, and the tube-side outlet of each plate heat exchanger is fixedly connected to the cooling water inlet end of the vacuum pump through a cooling water pipeline.

[0009] On the desalinated water pipelines on both sides of the above-mentioned water transfer pump, a bypass pipeline can be fixedly connected, and a standby water transfer pump is fixedly installed on the bypass pipeline.

[0010] A standby pipeline is fixedly connected between the above-mentioned cooling water pipeline and the storage tank.

[0011] A liquid level gauge can be set on the above-mentioned storage tank, and an exhaust pipe is fixedly connected to the top of the storage tank.

[0012] A temperature monitoring instrument is fixedly installed on the above-mentioned cooling water pipeline, and a pressure monitoring instrument and an electric control valve are fixedly installed on the return water pipeline.

[0013] In the present utility model, desalinated water is used as the heat exchange medium for the tube side of the plate heat exchanger group, significantly reducing the frequency of fouling and blockage of the heat exchange tubes of the plate heat exchanger group; and the desalinated water after cooling the vacuum pump can be recycled to the storage tank, and the desalinated water is recycled, thereby ensuring the stable operation of the vacuum pump; in addition, the device adopts a closed-loop circulation mode, avoiding impurities in the environment from entering the desalinated water and maintaining the purity of the desalinated water. Description of the Drawings

[0014] Appendix Figure 1 is a schematic process flow diagram of the present utility model.

[0015] The codes in the drawings are respectively: 1 is the storage tank, 2 is the plate heat exchanger, 3 is the desalinated water make-up pipeline, 4 is the desalinated water pipeline, 5 is the cooling water pipeline, 6 is the circulating water inlet pipeline, 7 is the circulating water recovery pipeline, 8 is the return water pipeline, 9 is the water transfer pump, 10 is the dry screw vacuum pump, 11 is the bypass pipeline, 12 is the standby water transfer pump, 13 is the standby pipeline, 14 is the liquid level gauge, 15 is the exhaust pipe, 16 is the temperature monitoring instrument, 17 is the pressure monitoring instrument, and 18 is the electric control valve. Detailed Embodiments

[0016] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the present utility model and the actual situation.

[0017] In the present utility model, for the convenience of description, the description of the relative positional relationship of each component is carried out according to the layout mode of the attached Figure 1 drawings of the specification, such as: the positional relationships of front, back, top, bottom, left, right, etc. are based on the attachedFigure 1 It is determined according to the layout direction.

[0018] The following further describes the present utility model in conjunction with embodiments:

[0019] Embodiment 1: As Figure 1 shown, this closed-loop circulating cooling device for the cooling water of the vacuum pump includes a storage tank 1, a plate heat exchanger group, and a vacuum pump. A desalted water make-up pipeline 3 is fixedly connected to the storage tank 1. The bottom of the storage tank 1 is fixedly connected to the tube-side inlet of the plate heat exchanger group through a desalted water pipeline 4. The tube-side outlet of the plate heat exchanger group is fixedly connected to the cooling water inlet end of the vacuum pump through a cooling water pipeline 5. The shell-side inlet of the plate heat exchanger group is fixedly connected to a circulating water inlet pipeline 6. The shell-side outlet of the plate heat exchanger group is fixedly connected to a circulating water recovery pipeline 7. The cooling water outlet end of the vacuum pump is fixedly connected to the storage tank 1 through a return water pipeline 8. A water transfer pump 9 is fixedly installed on the desalted water pipeline 4.

[0020] Desalted water enters the storage tank 1 through the desalted water make-up pipeline 3. The desalted water in the storage tank 1 is transported to the plate heat exchanger group for cooling by the water transfer pump 9. The cooled desalted water is sent into the vacuum pump to cool the pump body of the vacuum pump. The desalted water in the vacuum pump is recovered into the storage tank 1 through the return water pipeline 8.

[0021] The present utility model uses desalted water as the heat exchange medium for the tube side of the plate heat exchanger group. Desalted water has the characteristics of few metal ions, few impurities, and not easy to scale. Therefore, the frequency of scaling and blockage of the tube side (heat exchange tubes) of the plate heat exchanger group is significantly reduced; and the desalted water after cooling the vacuum pump can be recovered into the storage tank 1, and the desalted water is recycled, thereby ensuring the stable operation of the vacuum pump.

[0022] Desalted water is distilled water.

[0023] The vacuum pump can be a conventional water-cooled vacuum pump, such as a dry screw vacuum pump 10.

[0024] As an optimization / improvement of the above closed-loop circulating cooling device for the cooling water of the vacuum pump:

[0025] Embodiment 2: As an optimization of the above embodiment, the plate heat exchanger group includes at least two plate heat exchangers 2. The plate heat exchangers 2 are connected in parallel with each other. The shell-side inlet of each plate heat exchanger 2 is fixedly connected to the circulating water inlet pipeline 6. The shell-side outlet of each plate heat exchanger 2 is fixedly connected to the circulating water recovery pipeline 7. The bottom of the storage tank 1 and the tube-side inlet of each plate heat exchanger 2 are fixedly connected to the desalted water pipeline 4. The tube-side outlet of each plate heat exchanger 2 is fixedly connected to the cooling water inlet end of the vacuum pump through a cooling water pipeline 5.

[0026] According to the cooling requirement, determine the number of the plate heat exchangers 2.

[0027] Embodiment 3: AsFigure 1 As shown in the figure, as an optimization of the above embodiment, bypass pipelines 11 are fixedly communicated with the desalination water pipelines 4 on both sides of the water transfer pump 9, and a standby water transfer pump 12 is fixedly installed on the bypass pipelines 11.

[0028] Embodiment 4: As Figure 1 shown in the figure, as an optimization of the above embodiment, a standby pipeline 13 is fixedly communicated between the cooling water pipeline 5 and the storage tank 1.

[0029] When the vacuum pump is temporarily out of service or encounters other working conditions, the cooled desalinated water can be switched to the storage tank 1 through the standby pipeline 13.

[0030] Embodiment 5: As Figure 1 shown in the figure, as an optimization of the above embodiment, a liquid level gauge 14 is arranged on the storage tank 1, and an exhaust pipe 15 is fixedly communicated with the top of the storage tank 1.

[0031] This device adopts a closed-loop circulation mode. By arranging the exhaust pipe 15, the entrained gas during operation can be discharged to ensure the stable operation of equipment (such as vacuum pumps, transfer pumps, etc.).

[0032] Embodiment 6: As Figure 1 shown in the figure, as an optimization of the above embodiment, a temperature monitoring instrument 16 is fixedly installed on the cooling water pipeline 5, and a pressure monitoring instrument 17 and an electric control valve 18 are fixedly installed on the return water pipeline 8.

[0033] The temperature monitoring instrument 16 can adopt a thermometer, and the thermometer can select a remote transmission thermometer. The pressure monitoring instrument 17 can adopt a pressure gauge, and the pressure gauge can select a digital pressure gauge.

[0034] Parameters of the remote transmission thermometer:

[0035] Temperature measurement range: -40°C to 600°C; Ambient temperature: -10°C to 55°C; Indicating accuracy: 1.5 level; For example, a WTY-series remote transmission thermometer provided by Chunhui Instrument Cable Co., Ltd. can be adopted.

[0036] Parameters of the digital pressure gauge:

[0037] Working power supply: 3.6VDC; Power consumption: 100 microwatts; Working temperature: 0°C to 55°C; Range: -0.1MPa to 60MPa; For example, a digital pressure gauge of model Xert-DP100 provided by Chunhui Instrument Cable Co., Ltd. can be adopted.

[0038] As required, on each pipeline of this vacuum pump cooling water closed-loop circulation cooling device, conventional valves and the like well-known and commonly used in the art can be set according to production needs.

[0039] The above technical features constitute an embodiment of the present utility model, which has strong adaptability and implementation effects. Non-essential technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims

1. A vacuum pump cooling water closed circulation cooling device, characterized in that It includes a storage tank, a plate heat exchanger group and a vacuum pump. The storage tank is fixedly connected with a desalted water replenishment pipeline. The bottom of the storage tank is fixedly connected with the tube side inlet of the plate heat exchanger group through the desalted water pipeline. The tube side outlet of the plate heat exchanger group is fixedly connected with the cooling water inlet end of the vacuum pump through the cooling water pipeline. The shell side inlet of the plate heat exchanger group is fixedly connected with a circulating water inlet pipeline. The shell side outlet of the plate heat exchanger group is fixedly connected with a circulating water recovery pipeline. The cooling water outlet end of the vacuum pump is fixedly connected with the storage tank through the return water pipeline. A water delivery pump is fixedly installed on the desalted water pipeline.

2. The vacuum pump cooling water closed circulation cooling device according to claim 1, characterized in that The plate heat exchanger group includes at least two plate heat exchangers, which are connected in parallel. The shell side inlet of each plate heat exchanger is fixedly connected to the circulating water inlet pipeline, and the shell side outlet of each plate heat exchanger is fixedly connected to the circulating water recovery pipeline. The bottom of the storage tank and the tube side inlet of each plate heat exchanger are fixedly connected to the desalted water pipeline, and the tube side outlet of each plate heat exchanger is fixedly connected to the cooling water inlet end of the vacuum pump through the cooling water pipeline.

3. The vacuum pump cooling water closed circulation cooling device according to claim 1 or 2, characterized in that The desalted water pipelines on both sides of the water delivery pump are fixedly connected with bypass pipelines, and a water delivery standby pump is fixedly installed on the bypass pipeline.

4. The vacuum pump cooling water closed circulation cooling device according to claim 1 or 2, characterized in that There is a spare pipeline fixedly connected between the cooling water pipeline and the storage tank.

5. The vacuum pump cooling water closed circulation cooling device according to claim 3 is characterized in that There is a spare pipeline fixedly connected between the cooling water pipeline and the storage tank.

6. The vacuum pump cooling water closed circulation cooling device according to claim 1, 2 or 5, characterized in that A liquid level gauge is provided on the storage tank, and an exhaust pipe is fixedly connected to the top of the storage tank.

7. The vacuum pump cooling water closed circulation cooling device according to claim 3 is characterized in that A liquid level gauge is provided on the storage tank, and an exhaust pipe is fixedly connected to the top of the storage tank.

8. The vacuum pump cooling water closed circulation cooling device according to claim 4, characterized in that A liquid level gauge is provided on the storage tank, and an exhaust pipe is fixedly connected to the top of the storage tank.

9. The vacuum pump cooling water closed circulation cooling device according to claim 1 or 2 or 5 or 7 or 8, characterized in that A temperature monitoring instrument is fixedly installed on the cooling water pipeline, and a pressure monitoring instrument and an electric control valve are fixedly installed on the return water pipeline.

10. The vacuum pump cooling water closed circulation cooling device according to claim 6, characterized in that A temperature monitoring instrument is fixedly installed on the cooling water pipeline, and a pressure monitoring instrument and an electric control valve are fixedly installed on the return water pipeline.

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