Wastewater cooler with filtering function

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a waste water cooler with a filtering function, which comprises a plate heat exchanger provided with a heating medium inlet pipe, a heating medium outlet pipe, a refrigerant medium outlet pipe and a refrigerant medium inlet pipe. The heating medium inlet pipe and the refrigerant medium inlet pipe are respectively communicated with the filter assembly through a second butt joint pipe, and the heating medium outlet pipe and the refrigerant medium outlet pipe are respectively connected with the discharge pipe. When the position of the floating ball descends, the triggering assembly can give an early warning, workers are reminded of the blockage condition of the filter screen in time, the workers do not need to continuously observe or manually check the filter screen, the workload of the workers is greatly relieved, meanwhile, the early warning accuracy and reliability are improved, and the circulation smoothness of waste water in a pipeline is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly designs a waste water cooler with a filtering function. Background Art

[0002] With the acceleration of the industrialization process, especially in heavy industries such as chemical industry, petroleum and steel, a large amount of high-temperature waste water is often generated during the production process. High temperature is not conducive to the reproduction of bacteria in the waste water tank, which increases the burden on waste water treatment to a certain extent. In addition, in some cases, it is necessary to heat up the waste water and then transport it to other production links for utilization. Therefore, it is very necessary to use a waste water cooler in such industrial applications. Through heat exchange technology, it can efficiently reduce the temperature of the waste water to a range suitable for the growth of microorganisms. At the same time, in cases where heating is required, the waste water cooler (or more generally, a heat exchanger) can also be used to increase the temperature of the waste water for effective utilization in subsequent processes, thereby saving energy and reducing the operating cost of the entire system.

[0003] During the process of treating industrial waste water, when the waste water is directly introduced into the waste water cooler for heat exchange, long-term use will cause impurities in the waste water to gradually accumulate inside the cooler. This will not only lead to a decline in the flow performance inside the cooler, but also affect its heat exchange efficiency. To solve this problem, a layer of filter screen is usually installed in the pipeline to intercept and filter these impurities. However, limited by the installation position of the filter screen, its inspection and replacement are relatively inconvenient, and there is often a lack of effective monitoring means to determine whether the filter screen is blocked. Once the filter screen is severely blocked, the flow rate of the waste water in the pipeline will slow down, thereby reducing the heat exchange efficiency, and the blocked filter screen is more likely to become a breeding ground for bacteria and microorganisms, causing secondary pollution to the waste water. Based on this, the inventor purposefully provides a waste water cooler with a filtering function that can remind to replace the blocked filter screen. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste water cooler with a filtering function that can remind to replace the blocked filter screen for the deficiencies of the prior art, so as to solve the problem that the filter screen in the waste water cooler in the prior art cannot be detected in time when it is blocked.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A waste water cooler with a filtering function includes a plate heat exchanger. A heat medium inlet pipe, a heat medium outlet pipe, a refrigerant medium outlet pipe, and a refrigerant medium inlet pipe are arranged on the plate heat exchanger. The heat medium inlet pipe and the refrigerant medium inlet pipe are respectively communicated with a filtering component through a second docking pipe, and the heat medium outlet pipe and the refrigerant medium outlet pipe are respectively connected with a discharge pipe;

[0007] Each filtering component includes a buffer pipe, a first docking pipe, and a filter screen. The filter screen is arranged inside the buffer pipe. The buffer pipe is communicated with the wastewater conveying pipe through the first docking pipe. The horizontal height of the connection between the buffer pipe and the first docking pipe is higher than the horizontal height of the filter screen, and the horizontal height of the connection between the buffer pipe and the second docking pipe is lower than the horizontal height of the filter screen.

[0008] The two second docking pipes are respectively communicated with an extension pipe, and the extension pipe is vertically upward. A trigger component is installed through the top of the extension pipe. A floating ball is slidably installed inside the extension pipe, and the floating ball is driven to move by the buoyancy of the medium inside the extension pipe. When the filter screen is blocked, the medium flowing through the second docking pipe decreases, resulting in a decrease in the medium inside the extension pipe. The floating ball moves downward, and the floating ball is separated from the trigger component, and the trigger component issues a warning.

[0009] As a further optimization or improvement of this solution.

[0010] The filtering component further includes a valve, and the valve is arranged on the first docking pipe.

[0011] As a further optimization or improvement of this solution.

[0012] A first boss is fixedly connected to the inner wall of each buffer pipe, and the first boss abuts against the bottom of the filter screen.

[0013] As a further optimization or improvement of this solution.

[0014] A sealing cover is arranged on the top of each buffer pipe. The sealing cover is detachable, and a handle is fixedly installed on the sealing cover.

[0015] As a further optimization or improvement of this solution.

[0016] A second boss is fixedly installed on the inner wall of each extension pipe for limiting the floating ball.

[0017] As a further optimization or improvement of this solution.

[0018] The connections between the heat medium inlet pipe and the refrigerant medium inlet pipe and the second docking pipe are docked by screws.

[0019] The beneficial effects of the present utility model:

[0020] 1. When the pores of the filter screen of the present utility model are blocked, the flow of wastewater is hindered, which will cause the water flow in the second docking pipe to decrease, and then the water level in the extension pipe will drop. The floating ball that loses the buoyancy support will move downward and thus separate from the triggering component. At this time, the triggering component will issue a warning to remind the worker to clean and replace the filter screen, eliminating the need for the worker to continuously observe or manually check the filter screen, greatly reducing the worker's workload, while also improving the accuracy and reliability of the warning, ensuring the smooth flow of wastewater in the pipeline, and thus guaranteeing the efficiency of heat exchange of the wastewater.

[0021] 2. In the present utility model, the filter screen is horizontally placed in the buffer pipe, and the intercepted impurities are located on the filter screen. The filter screen is removed from the buffer pipe vertically upward. In this way, the intercepted impurities still remain on the filter screen, and the impurities can be completely removed from the buffer pipe, avoiding the problem that when arranging a vertical filter screen in a horizontal pipeline, the intercepted impurities may fall off the filter screen due to vibration and other factors when the filter screen is removed and remain in the horizontal pipeline.

[0022] 3. The present utility model places the filter screen into the buffer pipe, and it can automatically fall under the action of gravity. When the filter screen abuts against the first convex platform, the installation is successful. Since the filter screen is horizontally placed and the wastewater flushes from above the filter screen, the impact force of the water flow and the limit of the first convex platform can fix the filter screen on the first convex platform without using other fixing parts to fix the filter screen. In this way, without sacrificing the filtering effect of the filter screen, the installation process of the filter screen is simplified, facilitating the operation of the worker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further describes the present utility model with reference to the drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0025] Figure 2 It is a schematic diagram of the buffer pipe structure.

[0026] Figure 3 It is a schematic cross-sectional view of the buffer pipe.

[0027] The labels in the figure are:

[0028] 1. Plate heat exchanger; 2. Hot medium inlet pipe; 3. Hot medium outlet pipe; 4. Refrigerant medium outlet pipe; 5. Refrigerant medium inlet pipe; 6. Buffer pipe; 7. First docking pipe; 8. Second docking pipe; 9. Extension pipe; 10. Triggering component; 11. Valve; 12. Filter screen; 13. First convex platform; 14. Second convex platform; 15. Floating ball; 16. Sealing cover; 17. Handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] See Figures 1-3 , a waste water cooler with a filtering function, which includes a plate heat exchanger 1. A hot medium inlet pipe 2, a hot medium outlet pipe 3, a refrigerant medium outlet pipe 4 and a refrigerant medium inlet pipe 5 are arranged on the plate heat exchanger 1. The hot medium inlet pipe 2 and the refrigerant medium inlet pipe 5 are respectively communicated with a filtering component through a second docking pipe 8, and the hot medium outlet pipe 3 and the refrigerant medium outlet pipe 4 are respectively connected with a discharge pipe;

[0031] Each filtering component includes a buffer pipe 6, a first docking pipe 7 and a filter net 12. The filter net 12 is arranged in the buffer pipe 6. The buffer pipe 6 is communicated with a waste water conveying pipe through the first docking pipe 7, and the horizontal height of the connection between the buffer pipe 6 and the first docking pipe 7 is higher than the horizontal height of the filter net 12, and the horizontal height of the connection between the buffer pipe 6 and the second docking pipe 8 is lower than the horizontal height of the filter net 12;

[0032] The two second docking pipes 8 are respectively communicated with an extension pipe 9, and the extension pipe 9 is vertically upward. A trigger component 10 is installed through the top of the extension pipe 9. A floating ball 15 is slidably installed in the extension pipe 9, and the floating ball 15 is driven to move by the buoyancy of the medium in the extension pipe 9. When the filter net 12 is blocked, the medium flowing through the second docking pipe 8 decreases, resulting in a decrease in the medium in the extension pipe 9. The floating ball 15 moves downward, and the floating ball 15 is separated from the trigger component 10, and the trigger component 10 issues a warning.

[0033] In a specific embodiment, the trigger component 10 includes a micro switch, a single-chip microcomputer, an alarm, etc. The above components are all prior art, and the specific models are not disclosed in the present utility model, which does not affect the integrity of the present utility model;

[0034] The working principle of the utility model is as follows: when the low-temperature wastewater needs to be heated, the low-temperature wastewater is introduced into the plate heat exchanger 1 through the refrigerant medium inlet pipe 5, and the high-temperature medium is introduced into the plate heat exchanger 1 from the hot medium inlet pipe 2. At this time, the low-temperature wastewater and the high-temperature medium will perform heat exchange in the plate heat exchanger 1, thereby heating the low-temperature wastewater; when the high-temperature wastewater needs to be cooled, the high-temperature wastewater is introduced into the plate heat exchanger 1 through the hot medium inlet pipe 2, and the low-temperature medium is introduced into the plate heat exchanger 1 through the refrigerant medium inlet pipe 5. At this time, the high-temperature wastewater and the low-temperature medium will perform heat exchange in the plate heat exchanger 1, thereby cooling the high-temperature wastewater.

[0035] Before the wastewater enters the plate heat exchanger 1, it first enters the buffer tube 6 through the first butt joint 7, and then flows into the second butt joint 8 after passing through the filter screen 12. At this time, the filter screen 12 will intercept the impurities and particulate matter in the wastewater and retain them above the filter screen 12. When the filtered wastewater flows into the second butt joint 8, the wastewater will also flow into the extension tube 9. Under the buoyancy of the wastewater, the floating ball 15 will be pushed upward so that it always abuts against the trigger component 10. With long-term use, the impurities intercepted on the filter screen 12 are The mass increases, thereby clogging the pores of the filter screen 12, obstructing the flow of wastewater, causing the water flow in the second docking tube 8 to decrease, and then causing the water level in the extension pipe 9 to drop, and the floating ball 15 that has lost its buoyancy support will move downward and separate from the trigger component 10. At this time, the trigger component 10 will issue an early warning to remind the workers to clean and replace the filter screen 12. When the wastewater flow through the filter screen 12 returns to normal, the water level in the extension pipe 9 rises, causing the floating ball 15 to abut against the trigger component 10 again, thereby releasing the early warning.

[0036] By placing the filter screen 12 horizontally in the buffer tube 6, and the intercepted impurities are located on the filter screen 12, when the filter screen 12 is replaced, the filter screen 12 is directly moved upward along the vertical direction out of the buffer tube 6, so that the intercepted impurities still remain on the filter screen 12, avoiding the problem of arranging a vertical filter screen 12 in a horizontal pipe, which causes the intercepted impurities to fall off the filter screen 12 due to vibration and other factors when the filter screen 12 is moved out, and remain in the horizontal pipe.

[0037] The position of the floating ball 15 can reflect the flow rate of the filtered wastewater in real time. Once the flow rate decreases, the position of the floating ball 15 drops, which can cause the trigger component 10 to issue an early warning, promptly reminding the worker that the filter screen 12 is clogged. The worker does not need to continuously observe or manually check the filter screen 12, which greatly reduces the worker's workload and improves the accuracy and reliability of the early warning.

[0038] Specifically, the filter assembly further includes a valve 11 , and the valve 11 is disposed on the first butt joint 7 .

[0039] In a specific embodiment, the opening and closing of the first docking pipe 7 can be controlled by the valve 11. When the filter net 12 needs to be replaced, the valve 11 needs to be manually turned to control the closing of the first docking pipe 7, and then the buffer pipe 6 is operated.

[0040] More specifically, a first boss 13 is fixedly connected to the inner wall of each buffer pipe 6, and the first boss 13 abuts against the bottom of the filter net 12.

[0041] In a specific embodiment, the filter net 12 is placed into the buffer pipe 6 and can automatically fall under the action of gravity. When the filter net 12 abuts against the first boss 13, the installation is successful. Since the filter net 12 is horizontally placed and the waste water flushes from above the filter net 12, the impact force of the water flow and the limitation of the first boss 13 can fix the filter net 12 on the first boss 13 without using other fixing components to fix the filter net 12. Thus, on the premise of not sacrificing the filtering effect of the filter net 12, the installation process of the filter net 12 is simplified, which is convenient for workers to operate.

[0042] At the same time, it should be noted that a sealing cover 16 is provided at the top of each buffer pipe 6. The sealing cover 16 is detachable, and a handle 17 is fixedly installed on the sealing cover 16.

[0043] In a specific embodiment, the sealing cover 16 is detachable. When the sealing cover 16 is separated from the buffer pipe 6, the valve 11 must be in a closed state. The filter net 12 can be taken out of the buffer pipe 6, or the filter net 12 can be placed into the buffer pipe 6. After the operation is completed, the sealing cover 16 can be reinstalled on the buffer pipe 6, and the handle 17 facilitates the operation of the sealing cover 16.

[0044] More specifically, a second boss 14 is fixedly installed on the inner wall of each extension pipe 9 for limiting the floating ball 15.

[0045] In a specific embodiment, when there is no water flow through the second docking pipe 8, or the water level is not sufficient to enter the extension pipe 9, the floating ball 15 will be blocked by the second boss 14 and will not fall into the second docking pipe 8, ensuring that the floating ball 15 is always located in the extension pipe 9.

[0046] At the same time, it should be noted that the connections between the heat medium inlet pipe 2 and the refrigerant medium inlet pipe 5 and the second docking pipe 8 are docked by screws.

[0047] In a specific embodiment, the hot medium inlet pipe 2 and the second docking pipe 8, as well as the refrigerant medium inlet pipe 5 and the second docking pipe 8, are docked by screws, which not only ensures the simplicity of the assembly process, but also this connection method conforms to the common practice and cost-effectiveness in the market.

[0048] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A wastewater cooler with filtering function, characterized in that: The plate heat exchanger (1) is provided with a hot medium inlet pipe (2), a hot medium outlet pipe (3), a cold medium outlet pipe (4) and a cold medium inlet pipe (5); the hot medium inlet pipe (2) and the cold medium inlet pipe (5) are respectively connected to a filter assembly through a second butt joint pipe (8); and the hot medium outlet pipe (3) and the cold medium outlet pipe (4) are respectively connected to a discharge pipe; Each filter assembly comprises a buffer tube (6), a first butt joint tube (7) and a filter screen (12), wherein the filter screen (12) is arranged in the buffer tube (6), the buffer tube (6) is connected to the wastewater delivery pipe through the first butt joint tube (7), and the horizontal height of the connection between the buffer tube (6) and the first butt joint tube (7) is higher than the horizontal height of the filter screen (12), and the horizontal height of the connection between the buffer tube (6) and the second butt joint tube (8) is lower than the horizontal height of the filter screen (12); The two second butt-jointed tubes (8) are respectively connected to the extension tube (9), and the extension tube (9) is vertically upward. A trigger assembly (10) is installed through the top of the extension tube (9). A floating ball (15) is slidably installed in the extension tube (9), and the floating ball (15) is driven to move by the buoyancy of the medium in the extension tube (9). When the filter screen (12) is blocked, the circulating medium in the second butt-jointed tube (8) is reduced, resulting in a reduction in the medium in the extension tube (9), and the floating ball (15) moves downward, the floating ball (15) is separated from the trigger assembly (10), and the trigger assembly (10) issues an early warning.

2. The wastewater cooler with filtering function according to claim 1, characterized in that: The filter assembly further comprises a valve (11), wherein the valve (11) is arranged on the first butt joint (7).

3. The wastewater cooler with filtering function according to claim 1, characterized in that: The inner wall of each buffer tube (6) is fixedly connected to a first boss (13), and the first boss (13) abuts against the bottom of the filter screen (12).

4. The wastewater cooler with filtering function according to claim 2, characterized in that: A sealing cover (16) is provided on the top of each buffer tube (6); the sealing cover (16) is detachable, and a handle (17) is fixedly mounted on the sealing cover (16).

5. The wastewater cooler with filtering function according to claim 1, characterized in that: A second boss (14) is fixedly mounted on the inner wall of each extension tube (9) and is used to limit the position of the floating ball (15).

6. The wastewater cooler with filtering function according to claim 1, characterized in that: The hot medium inlet pipe (2) and the cold medium inlet pipe (5) are butt-jointed with the second butt-jointed pipe (8) by means of screws.

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