Cooling water repeated purification circulating device

Abstract

The utility model relates to a cooling water repeated purification circulating device which comprises a boiler cooling system, a steam turbine cooling system, a circulating cooling water tower and a circulating cooling water pump which are sequentially connected through pipelines, and the circulating cooling water tower is connected with the boiler cooling system to form a circulating loop used for circularly cooling steam generated by a boiler. The end, away from the circulating cooling water pump, of the circulating cooling water tower is further connected with a circulating cooling water purification system, a control valve is arranged on a connecting pipeline, sampling valves are arranged on the portions, between the steam turbine cooling system and the circulating cooling water tower, of the first pipeline respectively, and circulating cooling water in the circulating loop is taken out through the sampling valves. And when the water quality is detected to have problems, the control valve is opened, and the circulating cooling water in the circulating loop is conveyed to the circulating cooling water purification system for circulating purification. The device has the advantages of simple and reasonable structure, stable operation, practicability, convenience and the like, and can effectively purify circulating water to improve the water quality.

Description

Technical Field

[0001] This utility model belongs to the field of cooling water circulation and purification technology, and relates to a cooling water repeated purification and circulation device. Background Technology

[0002] Large auxiliary equipment in the thermal power industry, such as primary blowers, induced draft fans, circulating pumps, high-pressure feedwater pumps, turbine oil cooling devices, and boiler water sampling devices, all require circulating cooling water for cooling. Generally, circulating cooling water adopts the form of air cooling and water cooling in cooling towers for natural cooling. During the circulating cooling process, it is easily invaded by external pollutants, microorganisms, scale formation, and the generation of some corrosive substances, which will make the water quality worse and worse. It will continuously form serious scale and corrosion on the coolers of various equipment, seriously affecting the safe and economical operation of important equipment.

[0003] To address this issue, a cooling water recirculation and purification device was designed to overcome the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a cooling water re-purification and circulation device that is simple and reasonable in structure, stable in operation, practical and convenient, and effectively purifies circulating water and improves water quality.

[0005] This utility model is achieved through the following technical solution: a cooling water recirculation and purification device, comprising a boiler cooling system, a turbine cooling system, a circulating cooling water tower, and a circulating cooling water pump connected in sequence by pipes. The circulating cooling water tower is connected to the boiler cooling system to form a circulation loop for circulating cooling of the steam generated by the boiler. The end of the circulating cooling water tower away from the circulating cooling water pump is also connected to a circulating cooling water purification system. A control valve is installed on the connecting pipe. Sampling valves are respectively installed on the first pipe between the turbine cooling system and the circulating cooling water tower. The circulating cooling water in the circulation loop is taken out through the sampling valve. When a water quality problem is detected, the control valve is opened to transport the circulating cooling water in the circulation loop to the circulating cooling water purification system for circulation purification.

[0006] Preferably, the circulating cooling water purification system consists of a sodium ion exchanger, a backwash pump, and a neutralization tank. The top of the sodium ion exchanger is connected to the first pipe of the turbine cooling system via a second pipe, and its bottom is connected to the side of the circulating cooling tower via a third pipe. The sodium ion exchanger purifies the circulating cooling water in the circulation loop and then re-transports it into the circulating cooling tower. The bottom of the circulating cooling tower is connected to the neutralization tank via a fourth pipe equipped with a backwash pump. A fifth pipe is installed on the neutralization tank, and the neutralization tank is connected to the top of the sodium ion exchanger via the fifth pipe, so that a loop is formed between the circulating cooling tower, the sodium ion exchanger, and the neutralization tank.

[0007] Preferably, a sixth pipe is provided on the neutralization tank, which is connected to the regeneration liquid tank, and a regeneration pump is provided on the sixth pipe.

[0008] Preferably, the sodium ion exchanger is provided with a filter media layer, a sodium ion exchange layer and an ultrafine filter media adsorption layer from top to bottom, which is used to purify the circulating cooling water layer by layer to ensure the purification effect.

[0009] Preferably, there are at least two circulating cooling water pumps arranged side by side, one normally open and one as a standby.

[0010] Preferably, control valves are installed at the positions before and after the first pipe, second pipe, fourth pipe, fifth pipe, sixth pipe, and circulating cooling water pump.

[0011] Preferably, the top of the circulating cooling tower is provided with at least one exhaust vent, and an exhaust fan is installed in the exhaust vent to exhaust the hot air generated by the boiler cooling system and the turbine cooling system.

[0012] The beneficial effects of this utility model are as follows:

[0013] The cooling water recirculation and purification device designed in this invention can effectively improve the cooling efficiency of various fans and large water pumps, ensure the safe operation of equipment, and reduce water consumption by eliminating the need for external discharge of circulating cooling water through internal circulation, thereby saving resources.

[0014] This invention ensures that the circulating cooling water is purified and filtered during the continuous cooling process, ensuring the safe operation of various important auxiliary machines (reducing the risk to the cooling system structure). Using the purification and circulation device of this invention, there is no need to add various scale inhibitors or change the water and drain it every day to ensure water quality, thus reducing the discharge of wastewater. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0016] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1 As shown, a cooling water recirculation and purification device includes a boiler cooling system 1, a turbine cooling system 2, a circulating cooling water tower 3, and a circulating cooling water pump 4 connected in sequence by pipes. The circulating cooling water tower 3 is connected to the boiler cooling system 1 to form a circulation loop for circulating cooling of the steam generated by the boiler. The end of the circulating cooling water tower 3 away from the circulating cooling water pump 4 is also connected to a circulating cooling water purification system 5, and a control valve 21 is installed on the connecting pipe. Sampling valves 22 are respectively installed on the first pipe 6 between the turbine cooling system 2 and the circulating cooling water tower 3. The circulating cooling water in the circulation loop is taken out through the sampling valves 22. When a water quality problem is detected, the control valve 21 is opened to transport the circulating cooling water in the circulation loop to the circulating cooling water purification system 5 for circulation purification.

[0019] The circulating cooling water purification system 5 consists of a sodium ion exchanger 27, a backwash pump 7, and a neutralization tank 8. The top of the sodium ion exchanger 27 is connected to the first pipe 6 of the turbine cooling system 2 via a second pipe 9, and its bottom is connected to the side of the circulating cooling tower 3 via a third pipe 10. The sodium ion exchanger 27 purifies the circulating cooling water in the circulation loop and then sends it back to the circulating cooling tower 3. The bottom of the circulating cooling tower 3 is connected to the neutralization tank 8 via a fourth pipe 11 with a backwash pump 7. A fifth pipe 12 is installed on the neutralization tank 8, and the neutralization tank 8 is connected to the top of the sodium ion exchanger 27 via the fifth pipe 12, so that a loop is formed between the circulating cooling tower 3, the sodium ion exchanger 27, and the neutralization tank 8.

[0020] The neutralization tank 8 is provided with a sixth pipe 13, which is connected to the regeneration liquid tank 14, and a regeneration pump 15 is provided on the sixth pipe 13.

[0021] The sodium ion exchanger 27 has a filter media layer 16, a sodium ion exchange layer 17, and an ultrafine filter media adsorption layer 18 arranged sequentially from top to bottom inside, which are used to purify the circulating cooling water layer by layer to ensure the purification effect.

[0022] The circulating cooling water pump 4 consists of at least two pumps arranged side by side, one of which is normally open and the other is a standby pump.

[0023] The first pipe 6, the second pipe 9, the fourth pipe 11, the fifth pipe 12, and the sixth pipe 13 are all equipped with control valves, namely control valve A26, control valve 21, control valve B23, control valve C24, and control valve D25, respectively. Control valves are also installed before and after the circulating cooling water pump 4.

[0024] The top of the circulating cooling tower 3 is provided with at least one exhaust port 19, and an exhaust fan 20 is installed in the exhaust port 19 to exhaust the hot air generated by the boiler cooling system 1 and the turbine cooling system 2.

[0025] To ensure water quality, the circulating cooling water can be filtered and desalinated to achieve a pH value between 6.5 and 8.5 and a conductivity controlled at 100 μS / cm. 2 Within this range, the hardness of the cooling water is controlled to be less than 3.0 mg / L; and the water source for the circulating cooling water is secondary demineralized water. This invention can effectively improve the cooling efficiency of various fans and large water pumps, ensuring the safe operation of the equipment. Furthermore, the internal circulation method eliminates the need for external discharge of the circulating cooling water, reducing water consumption and thus saving resources.

[0026] It is worth noting that the boiler cooling system (composed of an induced draft fan, etc.) and the turbine cooling system (composed of a turbine and a matching cooling system, etc.) in this utility model are conventional technologies, so they will not be described in detail. The circulating cooling water purification system is the most significant feature of this utility model, so it is described in detail.

[0027] This invention ensures that the circulating cooling water is purified and filtered during the continuous cooling process, ensuring the safe operation of various important auxiliary machines (reducing the risk to the cooling system structure). Using the purification and circulation device of this invention, there is no need to add various scale inhibitors or change the water and drain it every day to ensure water quality, reducing wastewater discharge, thereby achieving energy saving, emission reduction and cost reduction.

[0028] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A cooling water recirculation and purification device, comprising a boiler cooling system (1), a steam turbine cooling system (2), a circulating cooling tower (3), and a circulating cooling water pump (4) connected in sequence by pipes, wherein the circulating cooling tower (3) is connected to the boiler cooling system (1) to form a circulation loop for circulating cooling of steam generated by the boiler, characterized in that: The end of the circulating cooling tower (3) away from the circulating cooling water pump (4) is also connected to the circulating cooling water purification system (5). A control valve (21) is installed on the connecting pipe. A sampling valve (22) is installed on the first pipe (6) between the turbine cooling system (2) and the circulating cooling tower (3). The circulating cooling water in the circulating loop is taken out through the sampling valve (22). When a water quality problem is detected, the control valve (21) is opened to transport the circulating cooling water in the circulating loop to the circulating cooling water purification system (5) for circulation purification.

2. The cooling water recirculation and purification device according to claim 1, characterized in that: The circulating cooling water purification system (5) consists of a sodium ion exchanger (27), a backwash pump (7), and a neutralization tank (8). The top of the sodium ion exchanger (27) is connected to the first pipe (6) of the turbine cooling system (2) through a second pipe (9), and its bottom is connected to the side of the circulating cooling tower (3) through a third pipe (10). After purifying the circulating cooling water in the circulating loop, the sodium ion exchanger (27) is transported back to the circulating cooling tower (3). The bottom of the circulating cooling tower (3) is connected to the neutralization tank (8) through a fourth pipe (11) with a backwash pump (7). A fifth pipe (12) is installed on the neutralization tank (8). The neutralization tank (8) is connected to the top of the sodium ion exchanger (27) through the fifth pipe (12), so that a loop is formed between the circulating cooling tower (3), the sodium ion exchanger (27), and the neutralization tank (8).

3. The cooling water recirculation and purification device according to claim 2, characterized in that: The neutralization tank (8) is provided with a sixth pipe (13), which is connected to the regeneration liquid tank (14), and a regeneration pump (15) is provided on the sixth pipe (13).

4. The cooling water recirculation and purification device according to claim 2, characterized in that: The sodium ion exchanger (27) is provided with a filter media layer (16), a sodium ion exchange layer (17) and an ultrafine filter media adsorption layer (18) from top to bottom, which are used to purify the circulating cooling water layer by layer to ensure the purification effect.

5. The cooling water recirculation and purification device according to claim 1, characterized in that: The circulating cooling water pump (4) consists of at least two pumps arranged side by side, one of which is normally open and the other is a standby pump.

6. The cooling water recirculation and purification device according to claim 1 or 5, characterized in that: Control valves are installed at the front and rear positions of the first pipe (6), the second pipe (9), the fourth pipe (11), the fifth pipe (12), the sixth pipe (13), and the circulating cooling water pump (4).

7. The cooling water recirculation and purification device according to claim 1, characterized in that: The top of the circulating cooling tower (3) is provided with at least one exhaust port (19), and an exhaust fan (20) is installed in the exhaust port (19) to exhaust the hot air generated by the boiler cooling system (1) and the turbine cooling system (2).

Images