Self-circulation system of water-ring vacuum pump

Abstract

The utility model relates to the technical field of vacuum pumps, in particular to a self-circulation system of a water ring vacuum pump, which comprises a surface condenser, a water ring vacuum pump, a heat exchanger, a cooling water tank and a waste water collecting pool. A first inlet of the surface condenser fixedly communicates with a secondary steam pipeline, a first cooling water pipeline fixedly communicates between a side inlet of the water ring vacuum pump and a first outlet of the heat exchanger, and a second cooling water pipeline fixedly communicates between a first inlet of the heat exchanger and a first outlet in the bottom of the cooling water tank. An outlet in the top of the cooling water tank is fixedly communicated with a non-condensable gas emptying pipeline; a second inlet fixing groove in the top of the cooling water tank is communicated with a water replenishing pipeline. The device is reasonable and compact in structure and convenient to use, heat exchange is conducted on cooling water through circulating water, self-circulation of the cooling water is achieved through negative pressure, on one hand, zero discharge of waste water is achieved, on the other hand, automatic vacuum control is achieved, and the device has the advantages of being safe, labor-saving, simple, convenient and efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a water ring vacuum pump self circulating system belongs to vacuum pump technical field. BACKGROUND

[0002] At present, the negative pressure system is generally used in the solid alkali concentration device of the domestic chlor-alkali industry, the boiling point of the alkali solution is reduced through the negative pressure to reduce the energy consumption. The vacuum pump is used in the production process to reduce the vacuum degree of the pre-concentrator to below-85kPa, so that the concentration of the alkali solution is better improved from 48% to 62%, and then concentrated to 98% through the final concentrator, and finally the flake alkali is produced after being cooled by the flake alkali machine. The circulating water is used for cooling during the operation of the vacuum pump, and the cooled circulating water cannot be reused and is discharged into a ditch and enters the wastewater system.

[0003] In the actual production process, the vacuum pump needs to be continuously operated, a large amount of circulating water needs to be used for cooling, and the cooled circulating water enters the wastewater system, which causes the waste of water resources and increases the wastewater treatment capacity.

[0004] Therefore, it is necessary to study and create an energy-saving and environment-friendly water ring vacuum pump self circulating system. SUMMARY

[0005] The utility model provides a water ring vacuum pump self circulating system overcomes the above prior art deficiency, it can effectively solve the problem of water resource waste and wastewater increase existing in the present alkali concentration process.

[0006] The technical scheme of the utility model is realized through the following measures: a water ring vacuum pump self circulating system, including surface condenser, water ring vacuum pump. Heat exchanger, cooling water tank, surface condenser first import fixed communication has secondary steam pipeline, surface condenser first outlet and water ring vacuum pump air inlet between fixed communication has first non condensing gas pipeline, water ring vacuum pump air outlet and cooling water tank top first inlet between fixed communication has second non condensing gas pipeline, water ring vacuum pump side inlet and heat exchanger first outlet between fixed communication has first cooling water pipeline, heat exchanger first inlet and cooling water tank bottom first outlet between fixed communication has second cooling water pipeline, cooling water tank top outlet fixed amount communication has non condensing gas venting pipeline, cooling water tank top second inlet fixed amount communication has water supplement pipeline.

[0007] The following is the further optimization or / and improvement of the above-mentioned utility model technical scheme:

[0008] The above-mentioned still includes wastewater collection tank, cooling water tank bottom outlet fixed communication has drain pipeline, and the drain pipeline outlet is fixedly provided with the wastewater collection tank.

[0009] The first circulating water supply pipeline is fixedly communicated with the second inlet of the surface condenser, the first circulating water return pipeline is fixedly communicated with the second outlet of the surface condenser, and the condensate water pipeline is fixedly communicated with the third outlet of the surface condenser.

[0010] The second circulating water supply pipeline is fixedly communicated with the second inlet of the heat exchanger, and the second circulating water return pipeline is fixedly communicated with the second outlet of the heat exchanger.

[0011] The first remote thermometer, the second remote thermometer, the third remote thermometer and the fourth remote thermometer are fixedly arranged on the first cooling water pipeline, the second cooling water pipeline, the second circulating water return pipeline and the non-condensable gas venting pipeline respectively, and the remote liquid level meter is fixedly arranged on the cooling water tank.

[0012] The water replenishing valve, the liquid level adjusting valve and the temperature adjusting valve are fixedly arranged on the water replenishing pipeline, the second circulating water supply pipeline and the second cooling water pipeline respectively, the vacuum gauge and the vacuum degree adjusting valve are fixedly arranged on the first non-condensable gas pipeline in sequence according to the medium flow direction, and interlocks are arranged between the liquid level adjusting valve and the remote liquid level meter, between the temperature adjusting valve and the third remote thermometer and between the vacuum gauge and the vacuum degree adjusting valve.

[0013] The DCS controller is electrically connected with the first remote thermometer, the second remote thermometer, the third remote thermometer, the fourth remote thermometer, the remote liquid level meter, the water replenishing valve, the liquid level adjusting valve, the temperature adjusting valve, the vacuum gauge and the vacuum degree adjusting valve.

[0014] The utility model discloses a reasonable and compact structure, convenient to use, it includes surface condenser, water ring vacuum pump. Heat exchanger, cooling water tank, still include waste water collection pool. Water ring vacuum pump side portion import and heat exchanger first outlet between fixed communication has first cooling water pipeline, and heat exchanger first import and cooling water tank bottom first outlet between fixed communication has second cooling water pipeline, and cooling water tank bottom export fixed communication has drain pipeline, and drain pipeline export fixedly arranged with waste water collection pool. The utility model discloses utilize circulating water and give cooling water heat exchange, and cooling water realizes self -circulation through negative pressure, realizes the zero emission of waste water on one hand, realizes the automatic control of vacuum on the other hand still, has safe, laborsaving, simple, efficient characteristics. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACH Figure 1 It is process flow schematic diagram for the utility model.

[0016] ATTACH Figure 1The codes in the diagram are as follows: 1 for surface condenser, 2 for water ring vacuum pump, 3 for heat exchanger, 4 for cooling water tank, 5 for secondary steam pipeline, 6 for first non-condensable gas pipeline, 7 for second non-condensable gas pipeline, 8 for first cooling water pipeline, 9 for second cooling water pipeline, 10 for non-condensable gas venting pipeline, 11 for water supply pipeline, 12 for wastewater collection tank, 13 for drainage pipeline, 14 for first circulating water supply pipeline, 15 for first circulating water return pipeline, 16 for condensate pipeline, 17 for second circulating water supply pipeline, 18 for second circulating water return pipeline, 19 for first remote thermometer, 20 for second remote thermometer, 21 for third remote thermometer, 22 for fourth remote thermometer, 23 for remote level gauge, 24 for water supply valve, 25 for level regulating valve, 26 for temperature regulating valve, 27 for vacuum gauge, and 28 for vacuum degree regulating valve. Detailed Implementation

[0017] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0018] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0019] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0020] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0021] Example 1: As shown in the attached document Figure 1 As shown, the self-circulating water ring vacuum pump system includes a surface condenser 1, a water ring vacuum pump 2, a heat exchanger 3, and a cooling water tank 4. A secondary steam pipeline 5 is fixedly connected to the first inlet of the surface condenser 1. A first non-condensable gas pipeline 6 is fixedly connected between the first outlet of the surface condenser 1 and the inlet of the water ring vacuum pump 2. A second non-condensable gas pipeline 7 is fixedly connected between the outlet of the water ring vacuum pump 2 and the first inlet at the top of the cooling water tank 4. A first cooling water pipeline 8 is fixedly connected between the side inlet of the water ring vacuum pump 2 and the first outlet of the heat exchanger 3. A second cooling water pipeline 9 is fixedly connected between the first inlet of the heat exchanger 3 and the first outlet at the bottom of the cooling water tank 4. A non-condensable gas venting pipeline 10 is fixedly connected to the top outlet of the cooling water tank 4. A water replenishment pipeline 11 is fixedly connected to the second inlet at the top of the cooling water tank 4.

[0022] In this invention, the secondary steam from the upstream (alkali pre-condenser) is condensed by the surface condenser 1 to obtain non-condensable gas; the cooling water is cooled by the heat exchanger 3 and then used to cool the water ring vacuum pump 2, forming a water ring vacuum system that draws in the non-condensable gas from the surface condenser 1. The non-condensable gas is compressed by the water ring vacuum pump 2 and then enters the cooling water tank 4 for gas-liquid separation. The condensate after gas-liquid separation is used as the cooling water for the water ring vacuum pump 2 and is recycled.

[0023] The above-mentioned water ring vacuum pump self-circulation system can be further optimized and / or improved according to actual needs:

[0024] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, it also includes a wastewater collection tank 12, and a drainage pipeline 13 is fixedly connected to the bottom outlet of the cooling water tank 4. The wastewater collection tank 12 is fixedly installed at the outlet of the drainage pipeline 13.

[0025] If necessary, when the cooling water tank 4 is cleaned and rinsed, or when the water quality in the cooling water tank 4 fails the test, the cooling water is discharged into the wastewater collection pool 12 and then sent to the downstream calcium carbide process for acetylene production.

[0026] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, the second inlet of the surface condenser 1 is fixedly connected to the first circulating water supply line 14, the second outlet of the surface condenser 1 is fixedly connected to the first circulating water return line 15, and the third outlet of the surface condenser 1 is fixedly connected to the condensate water line 16.

[0027] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, the second inlet of heat exchanger 3 is fixedly connected to the second circulating water supply pipeline 17, and the second outlet of heat exchanger 3 is fixedly connected to the second circulating water return pipeline 18.

[0028] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, a first remote thermometer 19, a second remote thermometer 20, a third remote thermometer 21, and a fourth remote thermometer 22 are fixedly installed on the first cooling water pipeline 8, the second cooling water pipeline 9, the second circulating water return pipeline 18, and the non-condensable gas venting pipeline 10, respectively. A remote liquid level gauge 23 is fixedly installed on the cooling water tank 4.

[0029] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1As shown, the water supply pipeline 11, the second circulating water supply pipeline 17, and the second cooling water pipeline 9 are respectively fixedly provided with a water supply valve 24, a liquid level regulating valve 25, and a temperature regulating valve 26, and the first non-condensable gas pipeline 6 is sequentially fixedly provided with a vacuum gauge 27 and a vacuum degree regulating valve 28 in the medium flow direction, and interlocks are respectively arranged between the liquid level regulating valve 25 and the remote liquid level meter 23, between the temperature regulating valve 26 and the third remote temperature meter 21, and between the vacuum gauge 27 and the vacuum degree regulating valve 28.

[0030] According to needs, the opening degree of the vacuum degree regulating valve 28 can be adjusted to realize automatic control of the vacuum degree of the surface condenser 1.

[0031] Embodiment 7 is different from Embodiments 1 to 6 in that, as shown in the accompanying drawings, Figure 1 As shown, a DCS controller is further included, and the first remote temperature meter 19, the second remote temperature meter 20, the third remote temperature meter 21, the fourth remote temperature meter 22, the remote liquid level meter 23, the water supply valve 24, the liquid level regulating valve 25, the temperature regulating valve 26, the vacuum gauge 27, and the vacuum degree regulating valve 28 are electrically connected with the DCS controller.

[0032] According to needs, conventional valves, thermometers, and pressure gauges commonly known in the art can be arranged on the pipelines and devices of the water ring vacuum pump self-circulation system according to production needs. The model of the DCS controller can be a CS3000 controller produced by Yokogawa Corporation of Japan.

[0033] Before and after use comparison: Before use, the vacuum system is an open system, and the cooling water consumption of each water ring vacuum pump 2 is 4 m³ / h, and the cooling water is directly discharged to a ditch, causing waste of water resources; after use, the cooling water of the water ring vacuum pump 2 is completely closed and recycled.

[0034] The above technical features respectively constitute embodiments of the present application, have strong adaptability and implementation effect, and can increase or reduce unnecessary technical features according to actual needs to meet the needs of different situations.

[0035] The use process of the embodiment of the present application is as follows: first, the required amount of water is supplemented into the cooling water tank 4; then, the cooling water is cooled by the heat exchanger 3 and then enters the water ring vacuum pump 2 under the negative pressure of the water ring vacuum pump 2, forming a water ring vacuum system; finally, the non-condensable gas from the surface condenser 1 is sucked into the cooling water tank 4 by the water ring vacuum pump 2, and gas-liquid separation is performed, the non-condensable gas is exhausted, and the cooling water is recycled.

Claims

1. A water ring vacuum pump self-circulation system, characterized by The surface condenser is fixedly connected with the second inlet of the surface condenser, the first circulating water supply pipeline, the first circulating water return pipeline and the condensate water pipeline.

2. The water ring vacuum pump self-circulation system according to claim 1, characterized in that The surface condenser is fixedly connected with the second inlet of the surface condenser, the first circulating water supply pipeline, the first circulating water return pipeline and the condensate water pipeline.

3. Water ring vacuum pump self-circulation system according to claim 1 or 2, characterized in that The heat exchanger is fixedly connected with the second inlet of the heat exchanger, the second circulating water supply pipeline and the second circulating water return pipeline.

4. The water ring vacuum pump self-circulation system according to claim 1 or 2, characterized in that The heat exchanger is fixedly connected with the second inlet of the heat exchanger, the second circulating water supply pipeline and the second circulating water return pipeline.

5. The water ring vacuum pump self-circulation system according to claim 3, characterized in that The first cooling water pipeline, the second cooling water pipeline, the second circulating water return pipeline and the non-condensable gas venting pipeline are respectively fixedly provided with the first remote thermometer, the second remote thermometer, the third remote thermometer and the fourth remote thermometer, and the cooling water tank is fixedly provided with the remote liquid level meter.

6. The water ring vacuum pump self-circulation system according to claim 4, characterized in that The first cooling water pipeline, the second cooling water pipeline, the second circulating water return pipeline and the non-condensable gas venting pipeline are respectively fixedly provided with the first remote thermometer, the second remote thermometer, the third remote thermometer and the fourth remote thermometer, and the cooling water tank is fixedly provided with the remote liquid level meter.

7. The water ring vacuum pump self-circulation system according to claim 5, characterized in that The water supply pipeline, the second circulating water supply pipeline and the second cooling water pipeline are respectively fixedly provided with the water supply valve, the liquid level adjusting valve and the temperature adjusting valve, and the first non-condensable gas pipeline is sequentially fixedly provided with the vacuum gauge and the vacuum degree adjusting valve according to the medium flow direction.

8. The water ring vacuum pump self-circulation system according to claim 4, characterized in that The water supply pipeline, the second circulating water supply pipeline and the second cooling water pipeline are respectively fixedly provided with the water supply valve, the liquid level adjusting valve and the temperature adjusting valve, and the first non-condensable gas pipeline is sequentially fixedly provided with the vacuum gauge and the vacuum degree adjusting valve according to the medium flow direction.

9. Water ring vacuum pump self-circulation system according to claim 5 or 6 or 7, characterized in that The first remote thermometer, the second remote thermometer, the third remote thermometer, the fourth remote thermometer, the remote liquid level meter, the water supply valve, the liquid level adjusting valve, the temperature adjusting valve, the vacuum gauge and the vacuum degree adjusting valve are electrically connected with the DCS controller.

10. The water ring vacuum pump self-circulation system according to claim 9, characterized in that ​

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