CN211370728U - Divide solvent vacuum pump circulating water system - Google Patents

Abstract

The utility model discloses a divide solvent vacuum pump circulating water system belongs to water ring vacuum pump solvent separation processing technology field, can solve the water insoluble solvent discharge problem with high costs that current water ring vacuum pump got into in the use. The system comprises a water ring vacuum pump and a circulating water tank, wherein a water discharge air port of the water ring vacuum pump is connected with a water inlet of the circulating water tank through a pipeline, and a water outlet of the circulating water tank is connected with a water inlet of the water ring vacuum pump through a pipeline. The circulating water tank comprises a water tank body and a solvent discharging floating ball valve arranged in the water tank body, wherein a solvent in water pumped by a water ring vacuum pump is discharged by utilizing a solvent discharging channel arranged on the solvent discharging floating ball valve, and the water ring vacuum pump provides power for the flow of water in the system, so that the water after the solvent is discharged enters the water ring vacuum pump again for recycling. The utility model discloses equipment is simple, automatic operation, and the water consumption is low, and the running cost is low, is fit for the industrialization and uses.

Description

A kind of solvent separation vacuum pump circulating water system

technical field

The utility model relates to the technical field of solvent separation and treatment of a water ring vacuum pump, in particular to a circulating water system of a solvent separation vacuum pump.

Background technique

The water ring vacuum pump is a kind of rough vacuum pump, which can also be used as a compressor.

In production, water-ring vacuum pumps are often used to remove water-insoluble low-boiling solvents in temperature-sensitive materials. Since the low-boiling solvents cannot be completely condensed in the cooling stage, some low-boiling solvents such as toluene, n-heptane, n-hexane, ether, etc. In the water of the water ring vacuum pump, when the amount of solvent is too large, it will greatly affect the vacuum degree of the water ring vacuum pump, resulting in a decrease in the working efficiency of the water ring vacuum pump, and the amount of solvent gas in the vacuum exhaust gas will be greatly increased. Therefore, it is necessary to recycle the water in the water ring vacuum pump after treatment.

At present, the existing technology manually drains the upper solvent layer layered in the water after the vacuum system is stopped for a period of time. However, this method requires manual intermittent operation, which reduces the working efficiency of the equipment. Another method is to heat water to distill out the solvent, but this method needs to heat the water first, and then cool the water from which the solvent has been removed. The operation is complicated and the production cost is high.

Utility model content

In view of this, the utility model provides a solvent-separating vacuum pump circulating water system to solve the problem of high discharge cost of the water-insoluble solvent that enters during the use of the existing water-ring vacuum pump.

To achieve the above object, the utility model provides the following technical solutions:

A circulating water system of a solvent separation vacuum pump, comprising a water ring vacuum pump and a circulating water tank;

The water outlet of the water ring vacuum pump is connected to the water inlet of the circulating water tank through a pipeline, and the water outlet of the circulating water tank is connected to the water inlet of the water ring vacuum pump through a pipeline;

The circulating water tank includes a water tank main body and a solvent discharge float valve;

The solvent discharge float valve is arranged in the water tank main body, and the solvent in the water tank main body is discharged through the solvent discharge channel of the solvent discharge float valve;

the water ring vacuum pump for powering the flow of the water in the system.

As a further solution of the present invention, the circulating water tank further includes a water replenishing floating ball valve, which is arranged in the main body of the water tank to replenish water and keep the liquid level in the circulating water tank stable.

As a further scheme of the present invention: the circulating water tank also includes a baffle;

The partition plate is vertically arranged in the water tank main body, the upper end of the partition plate is fixedly connected with the upper cover of the water tank main body, the lower end of the partition plate leaves a gap with the bottom of the water tank main body, and the partition plate dividing the upper end of the water tank body into two parts;

The water inlet of the circulating water tank and the water outlet of the circulating water tank are arranged on two opposite side walls of the water tank main body;

The solvent discharge float valve is arranged in the space between the partition plate and the water inlet of the circulating water tank, and the water replenishment float valve is arranged in the space between the partition plate and the water outlet of the circulating water tank .

As a further scheme of the present utility model: the solvent discharge float valve comprises a solvent discharge float, a liquid replenishment port, a pull rod, a valve, a solvent discharge inlet, a solvent discharge pipe and a solvent discharge outlet;

A liquid replenishment port is provided on the solvent discharge float ball, and the liquid replenishment port is used to add liquid to the solvent discharge float ball;

The solvent discharge inlet is arranged on the outer wall of the solvent discharge float, the solvent discharge inlet is communicated with the solvent discharge pipe, the solvent discharge pipe is communicated with the solvent discharge outlet through a valve, and the solvent discharge outlet arranged on the side wall of the water tank body;

The solvent-discharging float ball is movably connected to the valve through the pull rod.

As a further solution of the present invention, the water replenishing floating ball valve is arranged above the side wall of the water outlet of the circulating water tank.

As a further solution of the present invention, the circulating water tank further includes an exhaust port, which is arranged on the top of the circulating water tank and is used to discharge the gas in the circulating water tank.

As a further solution of the present invention, the circulating water tank is further provided with a sewage outlet, and the sewage outlet is arranged on the side wall of the circulating water tank near the bottom, and is used to remove fixed residues in the water.

As a further solution of the present invention: the system further includes a heat exchanger, the water outlet of the heat exchanger is connected to the water inlet of the water ring vacuum pump through a pipeline, and the water outlet of the circulating water tank is connected through a pipeline The water inlet of the heat exchanger; used for cooling the water.

As a further solution of the present invention: the system further includes a gas-water separator, the water inlet of the gas-water separator is connected to the drainage gas outlet of the water ring vacuum pump through a pipeline, and the water outlet of the gas-water separator The water inlet of the circulating water tank is connected through a pipeline; it is used to separate the gas in the water.

The beneficial effects of the present utility model include but are not limited to:

(1) The solvent separation vacuum pump circulating water system provided by the utility model, by setting the water ring vacuum pump and the circulating water tank, the water outlet of the water ring vacuum pump is connected to the water inlet of the circulating water tank through the pipeline, and the water outlet of the circulating water tank is connected to the water through the pipeline. The water inlet of the ring vacuum pump. The circulating water tank includes a water tank main body and a solvent-draining floating ball valve arranged in the water tank main body. The solvent in the water drawn by the water-ring vacuum pump is discharged through the solvent-draining channel provided in the solvent-removing floating ball valve, and the water-ring vacuum pump provides water flow in the system. Power, so that the water after removing the solvent re-enters the water ring vacuum pump for recycling. The utility model has the advantages of simple equipment, automatic operation, low water consumption and low operation cost, and is suitable for industrial application.

(2) Further, in the present invention, the solvent discharge float valve is arranged in the circulating water tank, so that the solvent whose density is less than the density of the solvent discharge float ball is discharged from the solvent discharge port; The ball valve reduces the liquid level caused by the discharge of the solvent, and the water replenishment float valve is used to automatically replenish water; further, the utility model, by arranging a baffle in the circulating water tank, greatly reduces the fluctuation of the liquid level caused by the replenishment process, which further affects the Solvent stratification and drainage problems.

(3) Further, the utility model further discharges the gas in the water through the provided gas-water separator, reducing the fluctuation of the liquid level in the circulating water tank when the water enters the circulating water tank; A heat exchanger is set to cool and cool the water, so that it can be used again in the water ring vacuum pump, which reduces the cost.

(4) The device of the utility model is simple, automatic control, greatly reduces the cost of manpower and material resources, does not require external energy consumption, saves water resources, and has low environmental protection pressure, and can be widely used in toluene, n-heptane, etc. Solvents other than water are removed from water.

Description of drawings

Fig. 1 is the structural representation of a kind of solvent separation vacuum pump circulating water system provided by the embodiment of the present invention;

2 is a schematic structural diagram of a circulating water tank in a solvent-dissolving vacuum pump circulating water system provided by an embodiment of the present invention;

In the figure: 1-water ring vacuum pump; 2-circulating water tank; 3-water outlet of water-ring vacuum pump; 4-water inlet of circulating water tank; 5-water outlet of circulating water tank; 6-water inlet of water-ring vacuum pump; 7- Separator; 8-solvent discharge float; 9-refill port; 10-solvent inlet; 11-solvent pipe; 12-solvent outlet; 13-refill float valve; 14-tie rod; 15-exhaust port; 16 - sewage outlet; 17- gas-water separator; 18- water inlet of gas-water separator; 19- water outlet of gas-water separator; 20- exhaust gas outlet; 21- heat exchanger; 22- inlet of heat exchanger Water outlet; 23-water outlet of heat exchanger; 24-cooling water inlet; 25-cooling water outlet; 26-air suction port of water ring vacuum pump.

Detailed ways

The present utility model is described in detail below in conjunction with the embodiments, but the present utility model is not limited to these embodiments.

The embodiment of the present utility model provides a solvent-separating vacuum pump circulating water system, as shown in FIG. 1 , including a water ring vacuum pump 1 and a circulating water tank 2;

The water outlet 3 of the water ring vacuum pump is connected to the water inlet 4 of the circulating water tank through a pipeline, and the water outlet 5 of the circulating water tank is connected to the water inlet 6 of the water ring vacuum pump through a pipeline;

The circulating water tank 2 includes a water tank main body and a solvent discharge float valve;

The solvent discharge float valve is arranged in the main body of the water tank, and the solvent in the water tank main body is discharged through the solvent discharge channel of the solvent discharge float valve.

The water ring vacuum pump 1 is used to provide power for the flow of water in the system.

Wherein, the water ring vacuum pump 1 can be of various types in the prior art, which is not limited in the present invention.

The water pumped out by the water ring vacuum pump 1 of the utility model contains solvent, and the solvent is discharged through the solvent discharge channel arranged in the solvent discharge float valve, thereby realizing the recycling of the water in the water ring vacuum pump 1 .

Further, the solvent discharge float valve includes a solvent discharge float 8, a liquid replenishment port 9, a pull rod 14, a valve, a solvent discharge inlet 10, a solvent discharge pipe 11 and a solvent discharge outlet 12;

A liquid replenishment port 9 is provided on the solvent discharge float 8, and the liquid replenishment port 9 is used for adding liquid to the solvent discharge ball 8;

A valve is also provided on the solvent discharge float 8;

The solvent discharge inlet 10 is arranged on the outer wall of the solvent discharge float 8, the solvent discharge inlet 10 is communicated with the solvent discharge pipe 11, the solvent discharge pipe 11 is communicated with the solvent discharge outlet 12 through a valve, and the solvent discharge outlet 12 is arranged on the side wall of the water tank main body. superior;

The solvent discharge float is movably connected to the valve through the pull rod 14 .

Among them, the solvent discharge pipe 11 is a hose. The solvent discharge float 8 is connected to the solvent discharge outlet 12 through the tie rod 14. When the solvent enters the circulating water tank 2, the solvent level is higher than the solvent discharge inlet 10, the solvent discharge pipe 11 is communicated with the discharge solvent outlet 12, and the solvent flows from the solvent discharge inlet 10. After entering, it is discharged from the solvent discharge outlet 12 after passing through the solvent discharge pipe 11 .

Before putting the solvent discharge float 8 into the circulating water tank 2, add liquid to the solvent discharge float 8 from the refill port 9, and match the buoyancy characteristics of the solvent discharge float 8, so that the density of the solvent discharge float 8 is 0.90-1g/ between cm ³ . During use, when a solvent such as toluene, n-heptane, etc. enters the circulating water tank 2, since the solvent is insoluble in water, and the density of the solvent is less than that of water, the water is the upper solvent layer and the lower water layer, because the density of the solvent layer is small, The solvent discharge float 8 enters between the water layer and the solvent layer, the solvent level is higher than the solvent discharge inlet 10, and the solvent discharge pipe 11 is communicated with the solvent discharge outlet 12, so that the solvent enters from the solvent discharge inlet 10 on the solvent discharge float 8. The solvent discharge pipe 11 is then discharged from the solvent discharge outlet 12 until the solvent higher than the solvent discharge inlet 10 is discharged, and the solvent discharge float 8 rises to the highest liquid level.

Further, the circulating water tank 2 further includes a water replenishment floating ball valve 13 , which is arranged in the main body of the water tank and is used to replenish water and keep the liquid level in the circulating water tank 2 stable.

Further, the water replenishing float valve 13 is arranged above the side wall of the water outlet 5 of the circulating water tank.

In the utility model, the water replenishment floating ball valve 13 is a commercially available conventional floating ball control valve, the low liquid level valve is opened, and the high liquid level valve is closed.

When the solvent is discharged, the liquid level in the circulating water tank 2 drops, the water replenishment float valve 13 is opened to replenish water, and the replenishment water enters the circulating water tank 2 until the upper limit of the liquid level is reached, the water replenishment float valve 13 is closed.

In the circulating water tank 2 of the present invention, the water replenishment float valve 13 and the solvent discharge float valve are used to effectively carry out automatic solvent separation and water replenishment operations without manual operation and additional heating, which greatly saves costs.

Further, the circulating water tank 2 also includes a partition 7;

The partition plate 7 is vertically arranged in the water tank main body, the upper end of the partition plate 7 is fixedly connected with the upper cover of the water tank main body, the lower end of the partition plate 7 and the bottom of the water tank main body leave a gap, and the partition plate 7 divides the upper end of the water tank main body into two parts;

The water inlet 4 of the circulating water tank and the water outlet 5 of the circulating water tank are arranged on two opposite side walls of the water tank main body;

The solvent discharge float valve is arranged in the space between the partition 7 and the water inlet 4 of the circulating water tank, and the water replenishing float valve 13 is arranged in the space between the partition 7 and the water outlet 5 of the circulating water tank.

Wherein, the partition 7 and the main body of the water tank can be in different ways such as welding, gluing, etc. In the present invention, the partition 7 is arranged in the circulating water tank 2, and the water tank is divided into two parts of solvent-containing water and solvent-free water by the partition 7, Separating the solvent-discharging float valve and the water-filling float valve 13 reduces the influence of the supplemented water flow on the liquid level in the circulating water tank 2, which is beneficial to the stratification and discharge of the solvent.

Further, the circulating water tank 2 further includes an exhaust port 15 , which is arranged on the top of the circulating water tank 2 and is used to discharge the gas in the circulating water tank 2 . By arranging the exhaust port 15 at the top of the circulating water tank 2 , the gaseous solvent volatilized in the water is discharged from the exhaust port 15 .

Further, the circulating water tank 2 is also provided with a sewage outlet 16, and the sewage outlet 16 is arranged on the side wall of the circulating water tank 2 near the bottom for removing fixed residues in the water. By arranging the sewage outlet 16 on the side wall of the circulating water tank 2 near the bottom, the solid residue in the water is removed, the physical damage caused by the solid residue to the system is reduced, and the service life of the machine is prolonged.

Further, the system of the present invention also includes a heat exchanger 21, the water outlet 5 of the circulating water tank is connected to the water inlet 22 of the heat exchanger through a pipeline, and the water outlet 23 of the heat exchanger is connected to the water inlet 6 of the water ring vacuum pump through a pipeline. , the circulating water tank 2 is used to cool the water.

In the present invention, through the heat exchanger 21 provided, the water enters the water ring vacuum pump 1 after being cooled by the heat exchanger 21, and the recycling cycle can be effectively carried out.

In the present invention, the heat exchanger 21 adopts the heat exchangers commonly used in the prior art, including floating head heat exchanger, fixed tube plate heat exchanger, U-shaped tube plate heat exchanger, plate heat exchanger, etc. For example, a plate heat exchanger is preferred. The cooling water inlet 24 and the cooling water outlet 25 of the heat exchanger are respectively connected to the inlet and outlet of the cooling tower water flow for cooling the water in the circulating water tank 2 . And the flow direction of the cooling water in the circulating water tank 2 is opposite to the flow direction of the water drawn by the water ring vacuum pump 1 in the circulating water tank 2, which increases the heat exchange area and improves the cooling efficiency of the water drawn by the water ring vacuum pump 1.

In addition, the water inlet 22 of the heat exchanger of the present invention is set at a high position and is connected with the water outlet 5 of the circulating water tank; the water outlet 23 of the heat exchanger is set at a low position and is connected with the water inlet 6 of the water ring vacuum pump. 1. During operation, the water inlet 6 of the water ring vacuum pump exhibits negative pressure, and the low-level outlet water of the heat exchanger 21 is pumped into the water ring vacuum pump 1 due to the negative pressure, so as to achieve recycling without additional circulating water pumps.

Further, the system of the present invention also includes a gas-water separator 17, the water inlet 18 of the gas-water separator is connected to the drain air port 3 of the water ring vacuum pump through a pipeline, and the water outlet 19 of the gas-water separator is connected to the circulating water tank through a pipeline. The water inlet 4 and the water separator 17 are used to separate the gas in the water.

Among them, the gas-water separator 17 adopts the gas-water separator 17 commonly used in the prior art, including a tubular separator, a louver-type separator, a cyclone separator, etc. Limit, as long as the equipment can achieve gas and liquid separation.

In the present invention, the gas-water separator 17 is connected to the top of the water-ring vacuum pump's drainage gas port 3, and the gas-water separator 17 is provided with a tail gas outlet 20 for discharging the separated gas.

Further, the water outlet 19 of the gas-water separator is horizontally higher than the water inlet 4 of the circulating water tank.

In the utility model, the gas-water separator 17 is firstly arranged on the water-ring vacuum pump's drainage gas port 3 to separate the gas and liquid, the gas in the water is discharged from the exhaust gas outlet 20 provided on the gas-water separator 17, and the remaining liquid flows into the circulating water tank 2. , so that the water in the circulating water tank 2 can be prevented from being impacted by the airflow, and the liquid level in the circulating water tank 2 can be kept relatively stable, which is more conducive to the stratification and discharge of the solvent.

Using the solvent-separating vacuum pump circulating water system provided by this embodiment, when the vacuum concentration process is running, the water that is mixed with solvents such as toluene is brought into the water-ring vacuum pump 1 through the air suction port 26 of the water-ring vacuum pump, and the water is drained from the water-ring vacuum pump. 3. After entering the gas-water separator 17, the gas and water are separated, the separated gas is discharged from the exhaust gas port 20 of the gas-water separator 17, and the remaining level enters the circulating water tank 2 slowly. At this time, solvents such as toluene are in the circulating water tank 2. Layering, the circulating water tank 2 discharges the solvent in the circulating water tank 2 through the water replenishment float valve 13 and the solvent discharge float valve, and maintains a relatively stable liquid level in the circulating water tank 2. The water enters the heat exchanger 21 from the water outlet 5 of the circulating water tank. The water is solvent-free water. After the heat exchanger 21 is cooled, it passes through the water outlet 23 of the heat exchanger and the water inlet 6 of the water ring vacuum pump, and is pumped into the water ring vacuum pump 1 under the negative pressure of the water ring vacuum pump 1 for the next time. cycle.

The solvent separation vacuum pump circulating water system provided by the utility model is provided with a water ring vacuum pump 1 and a circulating water tank 2, the water outlet 3 of the water ring vacuum pump is connected to the water inlet 4 of the circulating water tank through a pipeline, and the water outlet 5 of the circulating water tank is connected through a pipeline Connect the water inlet 6 of the water ring vacuum pump. The circulating water tank 2 includes a water tank main body and a solvent-draining floating ball valve arranged in the water tank main body. The solvent in the water drawn by the water-ring vacuum pump is discharged through the solvent-draining channel provided in the solvent-removing floating ball valve. The flow provides power, so that the water after removing the solvent re-enters the water ring vacuum pump 1 for recycling. The utility model has the advantages of simple equipment, automatic operation, low water consumption and low operation cost, and is suitable for industrial application.

The above are only a few embodiments of the present utility model, and are not intended to limit the present utility model in any form. Although the present utility model is disclosed above with preferred embodiments, it is not intended to limit the present utility model. Anyone familiar with the professional Those skilled in the art, without departing from the scope of the technical solution of the present invention, make some changes or modifications by using the technical content disclosed above, which are equivalent to equivalent implementation cases and belong to the scope of the technical solution.

Claims (9)

1. a solvent separation vacuum pump circulating water system, is characterized in that, described system comprises water ring vacuum pump and circulating water tank; The water outlet of the water ring vacuum pump is connected to the water inlet of the circulating water tank through a pipeline, and the water outlet of the circulating water tank is connected to the water inlet of the water ring vacuum pump through a pipeline; The circulating water tank includes a water tank main body and a solvent discharge float valve; The solvent discharge float valve is arranged in the water tank main body, and the solvent in the water tank main body is discharged through the solvent discharge channel of the solvent discharge float valve; the water ring vacuum pump for powering the flow of the water in the system. 2. The solvent-separating vacuum pump circulating water system according to claim 1, wherein the circulating water tank further comprises a water replenishing floating ball valve, and the water replenishing floating ball valve is arranged in the main body of the water tank for replenishing water and maintaining all the water. The liquid level in the circulating water tank is stable. 3. The solvent-separating vacuum pump circulating water system according to claim 2, wherein the circulating water tank further comprises a baffle; The partition plate is vertically arranged in the water tank main body, the upper end of the partition plate is fixedly connected with the upper cover of the water tank main body, the lower end of the partition plate leaves a gap with the bottom of the water tank main body, and the partition plate dividing the upper end of the water tank body into two parts; The water inlet of the circulating water tank and the water outlet of the circulating water tank are arranged on two opposite side walls of the water tank main body; The solvent discharge float valve is arranged in the space between the partition plate and the water inlet of the circulating water tank, and the water replenishment float valve is arranged in the space between the partition plate and the water outlet of the circulating water tank . 4. The solvent-dispensing vacuum pump circulating water system according to claim 1, wherein the solvent-discharging float valve comprises a solvent-discharging float, a liquid replenishing port, a tie rod, a valve, a solvent-discharging inlet, a solvent-discharging pipe and a solvent-discharging outlet ; A liquid replenishment port is provided on the solvent discharge float ball, and the liquid replenishment port is used to add liquid to the solvent discharge float ball; The solvent discharge inlet is arranged on the outer wall of the solvent discharge float, the solvent discharge inlet is communicated with the solvent discharge pipe, the solvent discharge pipe is communicated with the solvent discharge outlet through a valve, and the solvent discharge outlet arranged on the side wall of the water tank body; The solvent-discharging float ball is movably connected to the valve through the pull rod. 5 . The solvent separation vacuum pump circulating water system according to claim 2 , wherein the water replenishing float valve is arranged above the side wall of the water outlet of the circulating water tank. 6 . 6 . The solvent separation vacuum pump circulating water system according to claim 1 , wherein the circulating water tank further comprises an exhaust port, which is arranged on the top of the circulating water tank and is used to discharge the gas in the circulating water tank. 7 . 7. The solvent separation vacuum pump circulating water system according to claim 1, wherein the circulating water tank is further provided with a sewage outlet, and the sewage outlet is arranged on the side wall of the circulating water tank close to the bottom for removing Fixed residues in water. 8. The solvent separation vacuum pump circulating water system according to claim 1, wherein the system further comprises a heat exchanger, and the water outlet of the heat exchanger is connected to the water inlet of the water ring vacuum pump through a pipeline, The water outlet of the circulating water tank is connected to the water inlet of the heat exchanger through a pipeline; it is used for cooling the water. 9 . The solvent-separating vacuum pump circulating water system according to claim 1 , wherein the system further comprises a gas-water separator, and the water inlet of the gas-water separator is connected to the drainage of the water-ring vacuum pump through a pipeline. 10 . A gas port, the water outlet of the gas-water separator is connected to the water inlet of the circulating water tank through a pipeline; it is used to separate the gas in the water.

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