Upper part of the air cooling tower chilled water recovery device and reuse system

Abstract

The present invention relates to the technical field of cooling tower spray water recovery devices, and is an upper chilled water recovery device and reuse system for an air cooling tower, which includes an air cooling tower and a water cooling tower. One side of the chilled water inlet pipe is communicated with the spray pipeline at the upper packing layer in the air cooling tower, and the other side of the chilled water inlet pipe is communicated with the chilled water outlet end of the water cooling tower. A water collecting tank is provided between the upper packing layer and the lower packing layer. One side of the chilled water return pipe is communicated with the inside of the water collecting tank, and the other side of the chilled water return pipe is communicated with the water inlet end of the water cooling tower. By means of the water collecting tank, the diversion trough, the water baffle, and the chilled water return pipe, most of the spray water at the upper packing layer is intercepted and introduced into the water cooling tower for cooling to form chilled water. Compared with the prior art in which all the spray water finally enters the air separation circulating water tank for cooling treatment, the power consumption of the entire air separation system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling tower spray water recovery devices, and is an upper part chilled water recovery device and reuse system of an air cooling tower. Background Art

[0002] In a traditional air separation system, an air cooling tower is often used as a precooling device to cool air. The air cooling tower is a packed tower, which generally has two layers of packing inside, and spray pipelines are arranged at each layer of packing. When air passes through the air cooling tower from bottom to top, the spray water in the air cooling tower flows from top to bottom and contacts the air reversely. While the air is cooled, it is also cleaned. The spray water after heat exchange with the air finally all falls to the bottom of the tower. The spray water at the bottom of the tower returns to the air separation circulating water tank through the liquid level regulating valve of the air cooling tower. After the water reaches the air separation circulating water tank, it is cooled by a cooling fan and treated with chemicals, and then sent to the air separation device for use. Since there is a large amount of water to be treated in the air separation circulating water tank, often hundreds of tons, a large amount of electric energy and chemicals will be consumed in this process. Coupled with the continuous blowing of the cooling fan, more water loss will also be caused. Therefore, this method is not economical and energy-saving. Summary of the Invention

[0003] The present invention provides an upper part chilled water recovery device and reuse system of an air cooling tower, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problem that in the existing air separation system, all the spray water in the air cooling tower finally has to enter the air separation circulating water tank for cooling treatment, resulting in excessive consumption of electric energy, chemicals and water, and being uneconomical and energy-saving.

[0004] The object of the present application is achieved as follows: The upper part chilled water recovery device of the air cooling tower includes a water collecting tank, a diversion trough, and a water baffle. The upper side of the water collecting tank is an open end. A number of notches are respectively arranged along the length directions of the front and rear edges of the open end of the water collecting tank. An inclined diversion trough is arranged on each notch. One end of the diversion trough is fixedly connected to the notch, and the other end of the diversion trough is an extended end. The connection end of the diversion trough and the notch is the low position side, and the extended end is the high position side. An inclined water baffle is also fixedly connected along the length direction of the upper edge of each diversion trough. The length of the water baffle corresponds to the length of the diversion trough. A chilled water return pipe communicating with the inside of the water collecting tank is also arranged outside the water collecting tank.

[0005] A reuse system comprising the above-mentioned chilled water recovery device at the upper part of the air cooling tower, including an air cooling tower and a water cooling tower. Both the air cooling tower and the water cooling tower are packed towers. An upper packing layer and a lower packing layer are respectively arranged at the upper and lower parts inside the air cooling tower. A chilled water inlet pipe is arranged outside the air cooling tower. One side of the chilled water inlet pipe is communicated with the spray pipeline at the upper packing layer inside the air cooling tower, and the other side of the chilled water inlet pipe is communicated with the chilled water outlet end of the water cooling tower. A rectangular water collecting tank is arranged along the diameter direction inside the tower body of the air cooling tower between the upper packing layer and the lower packing layer. The left and right ends of the water collecting tank are fixedly connected to the bottom bracket of the upper packing layer through connecting frames. The extended end of the diversion trough is also fixedly connected to the bottom bracket of the upper packing layer. One side of the chilled water return pipe is communicated with the inside of the water collecting tank, and the other side of the chilled water return pipe is communicated with the water inlet end of the water cooling tower. A control valve is installed on the chilled water return pipe, and an exhaust drain is also installed on the chilled water return pipe in front of the control valve.

[0006] The following is a further optimization or / and improvement of the above-mentioned reuse system technical solution: Further, the diversion trough is in the shape of a semi-sectioned circular tube, and the axis distributed along the length direction of the diversion trough forms a 60° angle with the cross-sectional plane of the air cooling tower.

[0007] Further, the plane where the water baffle is located forms a 60° angle with the cross-sectional plane of the air cooling tower.

[0008] Through the water collecting tank, the diversion trough, the water baffle, and the chilled water return pipe, the present invention intercepts most of the spray water at the upper packing layer and introduces it into the water cooling tower for cooling to form chilled water, and then returns the chilled water to the air cooling tower as spray water through the chilled water delivery pipe. The spray water at the lower packing layer still enters the air separation circulating water tank for treatment. Compared with the prior art where all the spray water in the air cooling tower finally enters the air separation circulating water tank for cooling treatment, the present invention can reduce the treatment load of the air separation circulating water tank, reduce the power consumption and chemical consumption, reduce the power consumption of the entire air separation system, and reduce the water loss caused by the blowing of the cooling fan. Therefore, the present invention has strong economic efficiency and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The specific structure of the present application is given by the following drawings and embodiments:

[0010] Attached Figure 1 is a schematic structural diagram of the chilled water recovery device at the upper part of the air cooling tower;

[0011] Attached Figure 2 is a schematic structural diagram of the reuse system.

[0012] Legend: 1. Water collecting tank, 2. Flow guiding groove, 3. Water baffle, 4. Notch, 5. Chilled water return pipe, 6. Air cooling tower, 7. Water cooling tower, 8. Upper packing layer, 9. Lower packing layer, 10. Chilled water inlet pipe, 11. Bottom support, 12. Connecting frame, 13. Control valve, 14. Exhaust drain, 15. Spraying pipeline, 16. Tower bottom pump. Detailed implementation manners

[0013] This application is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of this application and the actual situation.

[0014] In the present invention, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the Figure 1 accompanying drawings of the specification. For example, the position relationships such as up, down, left, and right are determined according to the layout Figure 1 direction of the accompanying drawings of the specification.

[0015] The following further describes the present invention in combination with embodiments and the accompanying drawings. Embodiment 1: As shown in the Figure 1 accompanying drawings, the chilled water recovery device at the upper part of the air cooling tower 6 includes a water collecting tank 1, a flow guiding groove 2, and a water baffle 3. The upper side of the water collecting tank 1 is an open end. A number of notches 4 are respectively arranged along the length direction of the front and rear edges of the open end of the water collecting tank 1. A flow guiding groove 2 is inclinedly arranged on each notch 4. One end of the flow guiding groove 2 is fixedly connected to the notch 4, and the other end of the flow guiding groove 2 is an extended end. The connection end of the flow guiding groove 2 and the notch 4 is the low position side, and the extended end is the high position side. A slantingly arranged water baffle 3 is fixedly connected along the length direction of the upper end edge of each flow guiding groove 2. The length of the water baffle 3 corresponds to the length of the flow guiding groove 2. A chilled water return pipe 5 communicating with the inside of the water collecting tank 1 is further arranged outside the water collecting tank 1.

[0016] Embodiment 2: As shown in the Figure 2As shown in the figure, a reuse system including the above-mentioned chilled water recovery device in the upper part of the air cooling tower 6 comprises an air cooling tower 6 and a water cooling tower 7. Both the air cooling tower 6 and the water cooling tower 7 are packed towers. An upper packing layer 8 and a lower packing layer 9 are respectively arranged in the upper and lower parts of the air cooling tower 6. A chilled water inlet pipe 10 is arranged outside the air cooling tower 6. One side of the chilled water inlet pipe 10 is communicated with a spray pipeline 15 at the upper packing layer 8 inside the air cooling tower 6, and the other side of the chilled water inlet pipe 10 is communicated with the chilled water outlet end of the water cooling tower 7. A rectangular water collecting tank 1 is arranged along the diameter direction inside the tower body of the air cooling tower 6 between the upper packing layer 8 and the lower packing layer 9. The left and right ends of the water collecting tank 1 are fixedly connected with the bottom bracket 11 of the upper packing layer 8 by arranging a connecting bracket 12. The outer extending end of the diversion trough 2 is also fixedly connected with the bottom bracket 11 of the upper packing layer 8. One side of the chilled water return pipe 5 is communicated with the inside of the water collecting tank 1, and the other side of the chilled water return pipe 5 is communicated with the water inlet end of the water cooling tower 7. A control valve 13 is installed on the chilled water return pipe 5, and an exhaust drain 14 is also installed on the chilled water return pipe 5 in front of the control valve 13.

[0017] The air cooling tower 6 and the water cooling tower 7 are both well-known existing technologies. Because the media to be cooled are air and water respectively, they have different names. Compared with the existing technology, the present invention improves the air precooling link in the existing air separation system, optimizes the internal structure of the air cooling tower 6, and arranges a water recovery device composed of a water collecting tank 1, a diversion trough 2 and a water baffle 3 inside the tower body between the upper packing layer 8 and the lower packing layer 9 of the air cooling tower 6. A chilled water inlet pipe 10 and a chilled water return pipe 5 communicated with the water cooling tower 7 are also arranged on the air cooling tower 6. The water cooling tower 7 is used to generate chilled water. When the whole air separation system operates, air passes through the air cooling tower 6 from bottom to top. While the air is being cooled, it is also cleaned.

[0018] The upper packing layer 8 of the air cooling tower 6 is sprayed with chilled water, which comes from the water cooling tower 7. The chilled water is sprayed downward from the top of the air cooling tower 6 and exchanges heat with the air. After heat exchange, most of the chilled water is collected by the water baffle 3 into the diversion trough 2, and then diverted by the diversion trough 2 into the water collecting trough 1. The water in the water collecting trough 1 discharges air through the exhaust drain 14 in front of the control valve 13, and is led to the water cooling tower 7 through the chilled water return pipe 5. When the air separation system is operating, the internal pressure of the air cooling tower 6 is higher than the internal pressure of the water cooling tower 7. Using the pressure difference between the two, the recovered chilled water can flow by gravity along the chilled water return pipe 5 into the top of the water cooling tower 7, and then fall to the bottom of the tower through the spray pipe at the top of the tower. The spray water (the recovered chilled water) in the water cooling tower 7 is heated and cooled by the dirty nitrogen gas moving upward from the bottom of the tower, forming the bottom water, and then is transported by the bottom pump 16 through the chilled water inlet pipe 10 to the spray pipe at the upper packing layer of the air cooling tower 6, forming a complete cycle. The dirty nitrogen gas used to cool the spray water in the water cooling tower 7 comes from the rectifying column in the air separation system. The dirty nitrogen gas coming out of the rectifying column passes through the high and low pressure plate heat exchanger and then enters the water cooling tower 7, forming a cold source for heat exchange with the spray water. The generation of the dirty nitrogen gas and the process of cooling the spray water are also well-known technologies in the prior art; in addition, a small part of the chilled water that is not collected into the water collecting trough 1 falls to the bottom of the tower and returns to the air separation circulating water pool in the air separation system through the liquid level regulating valve on the air cooling tower 6. After cooling by the cooling fan and adding medicine treatment at the air separation circulating water pool, it is sent to the air separation unit for use. The spray water used in the lower packing layer 9 of the air cooling tower 6 in the present invention is the treated circulating cooling water in the air separation circulating water pool.

[0019] In the present invention, through the water collecting trough 1, the diversion trough 2, the water baffle 3, and the chilled water return pipe 5, most of the spray water at the upper packing layer 8 is intercepted and introduced into the water cooling tower 7 for cooling to form chilled water, and then the chilled water is returned to the air cooling tower 6 as spray water. The spray water at the lower packing layer 9 still enters the air separation circulating water pool for treatment. Compared with the prior art in which all the spray water in the air cooling tower 6 finally enters the air separation circulating water pool for cooling treatment, the present invention can reduce the treatment load of the air separation circulating water pool, reduce the power consumption and the amount of medicine used, reduce the power consumption of the entire air separation system, and also reduce the water loss caused by the blowing of the cooling fan. Therefore, the present invention has strong economic efficiency and practicality.

[0020] According to actual needs, the above-mentioned reuse system is further optimized and / or improved: Further, as shown in the attached Figure 2 figure, the diversion trough 2 is in the shape of a semi-sectioned circular tube, and the axis distributed along the length direction of the diversion trough 2 forms a 60° angle with the cross-sectional plane of the air cooling tower 6. The diversion trough 2 is inclined at 60°, which can more conveniently introduce the spray water into the water collecting trough 1.

[0021] Further, as shown in the appended Figure 2 figure, there is a 60° angle between the plane where the water baffle 3 is located and the cross-sectional plane of the air cooling tower 6. The water baffle 3 is inclined at 60°, which can more conveniently introduce the sprayed water into the diversion groove 2.

[0022] The above description is only an example for clearly explaining the present application, rather than a limitation on the implementation manner of the present application. Any obvious changes or variations derived from the technical solution of the present application are still within the protection scope of the present application.

Claims

1. A reuse system for a chilled water recovery device at the upper part of an air cooling tower, characterized in that It includes an air cooling tower and a water cooling tower. Both the air cooling tower and the water cooling tower are packed towers. An upper packing layer and a lower packing layer are respectively arranged at the upper and lower parts inside the air cooling tower. A chilled water inlet pipe is arranged outside the air cooling tower. One side of the chilled water inlet pipe is communicated with the spray pipeline at the upper packing layer inside the air cooling tower, and the other side of the chilled water inlet pipe is communicated with the chilled water outlet end of the water cooling tower. A rectangular water collecting tank is arranged along the diameter direction inside the tower body of the air cooling tower between the upper packing layer and the lower packing layer. The left and right ends of the water collecting tank are fixedly connected with the bottom bracket of the upper packing layer by setting connection frames. The outer extending end of the diversion trough is also fixedly connected with the bottom bracket of the upper packing layer. One side of the chilled water return pipe is communicated with the inside of the water collecting tank, and the other side of the chilled water return pipe is communicated with the water inlet end of the water cooling tower. A control valve is installed on the chilled water return pipe, and an exhaust drain is also installed on the chilled water return pipe in front of the control valve; The upper side of the water collecting tank is an open end. A number of notches are respectively arranged along the length direction of the front and rear two edges of the open end of the water collecting tank. A diversion trough is obliquely arranged on each notch. One end of the diversion trough is fixedly connected with the notch, and the other end of the diversion trough is an outer extending end. The connection end of the diversion trough and the notch is the low position side, and the outer extending end is the high position side. An inclined baffle is fixedly connected along the length direction of the upper edge of each diversion trough. The length of the baffle corresponds to the length of the diversion trough. A chilled water return pipe communicated with the inside of the water collecting tank is also arranged outside the water collecting tank; The water collecting tank, the diversion trough, the baffle, and the chilled water return pipe intercept most of the spray water at the upper packing layer and introduce it into the water cooling tower for cooling to form chilled water, and the chilled water is returned to the air cooling tower as spray water, and the spray water at the lower packing layer enters the air separation circulating water pool for treatment.

2. The reuse system of the chilled water recovery device at the upper part of the air cooling tower according to claim 1, characterized in that The diversion trough is in a semi-sectioned circular tube shape, and the axis distributed along the length direction of the diversion trough forms a 60° angle with the cross-sectional plane of the air cooling tower.

3. The reuse system of the chilled water recovery device at the upper part of the air cooling tower according to claim 1 or 2, characterized in that The plane where the baffle is located forms a 60° angle with the cross-sectional plane of the air cooling tower.

Images