Backwater cooling water recycling control system

Abstract

A cooling water return water recycling control system comprises a storage tank, a radar liquid level meter is arranged on the top of the storage tank, a field liquid level meter is arranged on the side wall of the storage tank, and an exhaust port is formed in the bottom of the storage tank; an electric or pneumatic switch valve and a manual stop valve a used for manually supplementing the liquid level of the storage tank are arranged on the industrial water inlet pipe in parallel, and the tail end of the industrial water inlet pipe is connected to a water inlet in the top of the storage tank; the cooling water return pipeline is connected with a cooling water recovery opening in the top of the storage tank; the cooling water outlet pipe is connected with the bottom of the storage tank, and a pressure pump A and a pressure pump B are arranged on the cooling water outlet pipe in parallel; and the cooling water pressurization conveying pipeline is connected with the tail end of the cooling water outlet pipe. The system has the advantages that the system is additionally arranged, water resources are saved, resource recycling is achieved, and cooling water control, storage tank liquid level stabilization and conveying medium pressure stabilization are achieved by additionally arranging the liquid level meter, the pressure transmitter and the switch valves.

Description

Technical Field

[0001] The utility model relates to the technical field of reusing cooling water return, and particularly relates to a control system for reusing cooling water return. Background Art

[0002] At present, most of the equipment of chemical production devices are equipped with cooling water cooling and sealing devices. If the raw water is not recycled, it is easy to cause waste of resources. Some chemical devices do not control the cooling water return well, and cannot protect the safe operation of the equipment. Content of the Utility Model

[0003] The purpose of the utility model is to provide a control system for reusing cooling water return aiming at the above deficiencies.

[0004] The utility model includes

[0005] A storage tank, on the top of which there is a radar level gauge, on the side wall of which there is a field level gauge, and at the bottom of which there is a drain port;

[0006] An industrial water inlet pipe, on which an electric or pneumatic on-off valve and a manual stop valve a for manually supplementing the liquid level of the storage tank are arranged in parallel, and the end of the industrial water inlet pipe is connected to the top water inlet of the storage tank;

[0007] A cooling water return pipe, which is connected to the cooling water recovery port at the top of the storage tank;

[0008] A cooling water outlet pipe, which is connected to the bottom of the storage tank, on which a pressure pump A and a pressure pump B are arranged in parallel, and on the inlet and outlet pipelines of the pressure pump A and the pressure pump B, there are respectively an inlet valve A, an outlet valve A, an inlet valve B and an outlet valve B;

[0009] A cooling water pressurized transmission pipe, which is connected to the end of the cooling water outlet pipe, and on the cooling water pressurized transmission pipe, there are a field pressure gauge and a pressure transmitter arranged in sequence.

[0010] Preferably, there is a connecting pipe between the inlet pipeline end of the pressure pump A and the outlet pipeline end of the pressure pump B, and a series connection valve is arranged on the connecting pipe. When the valve is closed, the two pressure pumps are used in parallel. If the pressure required by the device is high, the series valve can be manually opened, the valve A and the valve B are closed, and the two pumps of the pressure pump B and the pressure pump A are used to pressurize in sequence to reach twice the pressure to meet the cooling water pressure of the device.

[0011] Preferably, the electric or pneumatic on-off valve is interlocked and controlled to be opened or closed through the upper and lower limit values set with the radar level gauge.

[0012] Preferably, when the pressure transmitter operates normally through the pressurizing pump B (designated as the main pump), when the pressure reaches the lower limit value, the pressurizing pump A (designated as the auxiliary pump) is automatically started for interlocked operation. During the inspection, when the pressurizing pump B and the pressurizing pump A operate simultaneously, its failure is the failure of the main pump. It is necessary to manually switch to stop the main pump for inspection, repair, and maintenance. After restoring the function of the main pump, switch the main pump to operate, and the interlock continues to be put into operation.

[0013] Preferably, a manual stop valve b is also provided at the connection between the cooling water outlet pipe and the bottom of the storage tank, which remains in the normally open state, and it can be manually closed according to requirements.

[0014] Preferably, check valves A and B are respectively provided on the pipelines behind the outlet valve A and the outlet valve B.

[0015] The advantages of the present utility model are as follows: By adding this system, water resources are saved, and resource reuse is realized. The control of cooling water is achieved by adding a liquid level gauge, a pressure transmitter, and various switching valves, and the liquid level of the storage tank and the pressure of the conveying medium are stabilized. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of the present utility model. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, in the description of the present utility model, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0020] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set" and "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0021] As shown in the drawings, the present utility model includes

[0022] A storage tank 1, on the top of which there is a radar level gauge 5, on the side wall of which there is a field level gauge 6, and at the bottom of the storage tank 1 there is a drain port 7;

[0023] An industrial water inlet pipe 2, in parallel with which there are an electric or pneumatic on-off valve 3 and a manual stop valve a4 for manually supplementing the liquid level of the storage tank. The end of the industrial water inlet pipe 2 is connected to the top water inlet of the storage tank 1;

[0024] A cooling water return pipe 8, which is connected to the cooling water recovery port at the top of the storage tank 1;

[0025] A cooling water outlet pipe 9, which is connected to the bottom of the storage tank 1. In parallel with the cooling water outlet pipe 9, there are a pressurizing pump A10 and a pressurizing pump B11. On the inlet and outlet pipelines of the pressurizing pump A10 and the pressurizing pump B11, there are an inlet valve A12, an outlet valve A13, an inlet valve B14, and an outlet valve B15 respectively, for throttling control of the medium to facilitate switching of the pressurizing pump or maintenance;

[0026] A cooling water pressurized transmission pipe 20, which is connected to the end of the cooling water outlet pipe 9. On the cooling water pressurized transmission pipe 20, there are a field pressure gauge 18 and a pressure transmitter 19 in sequence. The field pressure gauge 18 detects the medium pressure in the on-site pipeline for easy inspection and monitoring.

[0027] In another technical solution, a connecting pipe 22 is provided between the inlet pipeline end of the pressure pump A10 and the outlet pipeline end of the pressure pump B11. A series connection valve 23 is provided on the connecting pipe 22. When this valve is closed, the two pressure pumps are used in parallel. If the pressure required by the device is high, the series valve can be manually opened, valve A12 and valve B15 can be closed, and the two pumps, namely pressure pump B11 and pressure pump A10, are used for pressurization in sequence to reach twice the pressure, so as to meet the cooling water pressure of the device.

[0028] In another technical solution, the electric or pneumatic on-off valve 3 is controlled to open or close by being interlocked with the upper and lower limit values set by the radar level gauge 5. The radar level gauge is integrated with a programmable logic controller (PLC) or other types of control systems. When the liquid level reaches the preset upper and lower limits, the PLC or other control systems will issue instructions according to these signals to control the opening or closing of the electric or pneumatic on-off valve.

[0029] In another technical solution, when the pressure transmitter 19 is in normal operation with the pressure pump B11 (set as the main pump), when the pressure reaches the lower limit value, the pressure pump A10 (set as the auxiliary pump) is automatically started for interlocked operation. During the inspection tour, when the pressure pump B11 and the pressure pump A10 are running simultaneously, its failure is the failure of the main pump, and it is necessary to manually switch to stop the main pump for inspection, repair, and maintenance. After restoring the function of the main pump, switch the main pump to run, and the interlock continues to be put into operation. The pressure transmitter can not only monitor and control the pressure, but also control the start and stop of the pump by controlling the output signal. Install a pressure switch on the output port of the pressure transmitter and connect it to the circuit controlling the pump. When the operating pressure of the pump reaches the specified value, the pressure switch will be triggered and transmit the signal to the switch circuit of the pump, thereby stopping the operation of the pump. When the pressure drops to a certain extent, the signal of the pressure switch will be transmitted back to the control circuit again to start the pump. In this way, the pressure transmitter can achieve the automatic start and stop control of the pump.

[0030] In another technical solution, a manual stop valve b21 is also provided at the connection between the cooling water outlet pipe 9 and the bottom of the storage tank 1, which is kept in the normally open state, and it can be manually closed according to requirements.

[0031] In another technical solution, check valves A16 and check valves B17 are respectively provided on the pipelines behind the outlet valve A13 and the outlet valve B15 to prevent the backflow of the medium.

[0032] Working mode: It is applicable to the recycling of the cooling water return of the production device equipment, saving resources, reducing waste, and reducing the environmental protection and equipment safety operation risks;

[0033] The upper and lower limits of the liquid level detected by the tank radar level gauge are interlocked with the inlet water switch valve to close or open, ensuring that the liquid level in the tank is within the effective range. Two parallel booster pumps are set as the main and auxiliary pumps. It is necessary to open all the inlet and outlet valves of the two pumps, close the series connection valve, and restore the check valve function. The upper and lower limits of the pressure transmitter on the pipeline after pressurization are interlocked with the auxiliary pump; if the pressure of a single booster pump cannot meet the required pressure of the device, the outlet valve of the main pump can be manually operated to close, the inlet valve of the auxiliary pump can be closed, and the series connection valve can be opened. The two pumps operate in series, and the pressure will increase exponentially to meet the pressure requirement of the production device.

[0034] The above embodiments are only for explaining the technical solutions and features of the present invention, and the purpose is to better enable those familiar with the technology to implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention are within the protection scope of the present invention. Those not described in detail are prior arts.

Claims

1. A control system for reusing the return water of cooling water, characterized in that, including a storage tank (1) with a radar level gauge (5) installed at its top, a field level gauge (6) installed on its side wall, and a drain port (7) provided at the bottom of the storage tank (1); an industrial water inlet pipe (2) with an electric or pneumatic on-off valve (3) and a manual stop valve a (4) for manually supplementing the liquid level of the storage tank connected in parallel thereto, and the end of the industrial water inlet pipe (2) is connected to the top water inlet of the storage tank (1); a cooling water return pipe (8) connected to the cooling water recovery port at the top of the storage tank (1); a cooling water outlet pipe (9) connected to the bottom of the storage tank (1), with a pressure pump A (10) and a pressure pump B (11) connected in parallel thereto. Import valves A (12) and outlet valves A (13), and import valves B (14) and outlet valves B (15) are respectively provided on the inlet and outlet pipelines of the pressure pump A (10) and the pressure pump B (11); A connecting pipe (22) is provided between the inlet pipeline end of the pressure pump A (10) and the outlet pipeline end of the pressure pump B (11), and a series connection valve (23) is provided on the connecting pipe (22); a cooling water pressurized transmission pipe (20) connected to the end of the cooling water outlet pipe (9), and a field pressure gauge (18) and a pressure transmitter (19) are sequentially provided on the cooling water pressurized transmission pipe (20).

2. The cooling water return water reuse control system according to claim 1, characterized in that, The electric or pneumatic on-off valve (3) is controlled to open or close by being interlocked with the upper and lower limit values set by the radar level gauge (5).

3. The cooling water return water reuse control system according to claim 1, wherein, When the pressure transmitter (19) is in normal operation through the pressure pump B (11), when the pressure reaches the lower limit value, the pressure pump A (10) is automatically started for interlocked operation. During inspection, when the pressure pump B (11) and the pressure pump A (10) are running simultaneously, the fault is the fault of the pressure pump B (11). It is necessary to manually switch to stop the pressure pump B (11) for inspection and repair. After restoring the function of the pressure pump B (11), switch the pressure pump B (11) to run, and the interlock is put into operation again.

4. A cooling water return water reuse control system according to claim 1, wherein A manual stop valve b (21) is also provided at the connection between the cooling water outlet pipe (9) and the bottom of the storage tank (1).

5. The cooling water return water reuse control system according to claim 1, characterized in that, Check valves A (16) and check valves B (17) are respectively provided on the pipelines behind the outlet valves A (13) and the outlet valves B (15).

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