Waste heat recovery device of water ring vacuum pump

Abstract

The utility model relates to the technical field of waste heat recovery, in particular to a water ring vacuum pump waste heat recovery device which comprises a box body, a heat preservation layer arranged on the inner wall of the box body, a box cover arranged at the top end of the box body, a hot water pipe welded to the left side of the box body close to the top end, and a cold water pipe welded to the right side of the box body close to the bottom end. A cooling pipe is welded between the hot water pipe water outlet and the cold water pipe water inlet, a water inlet pipe is arranged on the left side of the box body close to the front end, and filter assemblies are arranged at the hot water pipe water inlet, the cold water pipe water outlet and the water inlet pipe water inlet; according to the device, through the multi-layer spring-shaped cooling pipe, the contact area with cooling liquid is increased, the heat exchange efficiency of the device is improved, the waste heat recovery effect is improved, and the heat preservation effect of the waste heat recovery device is improved by arranging the heat preservation layer which is made of a composite heat preservation material and is not smaller than 2 cm in thickness; a filter assembly with a plurality of filter screens is arranged at an inlet and an outlet of each water pipe, fine dust and impurities entering the box body and the cooling pipe are filtered, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for a water ring vacuum pump. Background Art

[0002] The water ring vacuum pump was originally used as a self-priming water pump. Since the gas compression in the water ring pump is isothermal, it can extract flammable and explosive gases, as well as dusty and water-containing gases. Therefore, it is gradually used in many industrial sectors such as petroleum, chemical, machinery, mining, light industry, medicine and food. However, the water ring vacuum pump will generate some waste heat during operation due to the operation and friction of the machine. Since the current resources are relatively scarce, the waste heat recovery device is more important;

[0003] The utility model with the announcement number CN2524195Y discloses a waste heat recovery hot water device, which includes two heat exchangers at the hot and cold ends respectively connected to the tap water and waste hot water water circuits, connecting pipes and a refrigerator to form a refrigeration system;

[0004] In the above technical solution, through the heat pump effect of the refrigeration system, the heat exchanger at the cold end absorbs the heat energy of the waste hot water, and gradually conducts it to the heat exchanger at the hot end to heat the tap water for use. The used waste hot water flows into the heat exchanger at the cold end again, releases the heat energy and is then discharged. The device allows the heat energy to be circulated within the system and only consumes a small amount of maintenance energy. However, in actual use, the device has low heat exchange efficiency, poor waste heat recovery effect, and poor thermal insulation effect, resulting in waste heat waste, and no filtering device is provided, which is prone to blockage in actual use. Utility Model Content

[0005] The purpose of the utility model is to provide a ventilation and heat dissipation device for a prefabricated cabin to solve the problem of a waste heat recovery hot water device with the authorization announcement number CN2524195Y proposed in the above-mentioned background technology. However, in actual use, the device has low heat exchange efficiency, poor waste heat recovery effect, and poor thermal insulation effect, resulting in waste heat waste, and no filtering device is provided, which is prone to blockage in actual use.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A waste heat recovery device for a water ring vacuum pump comprises a box body, an inner wall of the box body is provided with a heat-insulating layer, a box cover is provided at the top of the box body, the box cover is rotatably connected to the box body through hinges, a plurality of supporting feet are welded to the bottom of the box body, a hot water pipe is welded to the left side of the box body near the top end, a cold water pipe is welded to the right side of the box body near the bottom end, a cooling pipe is welded between the water outlet of the hot water pipe and the water inlet of the cold water pipe, a water inlet pipe is provided to the left side of the box body near the front end, and filter components are provided at the water inlet of the hot water pipe, the water outlet of the cold water pipe, and the water inlet of the water inlet pipe.

[0008] Preferably, a handle is provided at the front end of the box cover, and the handle is integrally formed with the box cover.

[0009] In the utility model, the handle is provided to facilitate opening the box cover, so as to quickly add water to the inside of the net box body or replace damaged parts.

[0010] Preferably, a water level window is provided at the center of the front end of the box body, the top surface of the water level window should be higher than the water inlet of the hot water pipe, and the outer wall of the water level window is tightly fitted and bonded to the box body and the opening of the insulation layer.

[0011] In the utility model, a water level window is provided to facilitate direct observation of the water level inside the box, so that tap water inside the box can be added in time. The water level window is higher than the water inlet of the hot water pipe, which makes it convenient to fill the inside of the box with tap water. The tap water submerges the cooling pipe, increases the contact area between the cooling pipe and the tap water, and increases the waste heat recovery rate.

[0012] Preferably, a faucet is provided on the left side of the water level window near the bottom of the box body, the water inlet of the faucet penetrates the box body and the insulation layer and extends to the inside of the insulation layer, and the outer wall of the faucet is welded and fixed to the box body at the contact point.

[0013] In the utility model, a faucet is provided to facilitate taking heated tap water, so that residual heat can be utilized, and at the same time new tap water flows in through the water inlet pipe to maintain the cooling effect of the cooling pipe.

[0014] Preferably, a thermometer is provided on the right side of the water level window, a temperature probe of the thermometer penetrates the box body and the insulation layer and extends to the inside of the insulation layer, and a display screen of the thermometer is bonded and fixed to the surface of the box body.

[0015] In the utility model, by arranging a thermometer, the user can know the temperature of the tap water inside the box in real time, which is convenient for timely replacement of the tap water and maintaining the cooling effect. At the same time, the thermometer is close to the bottom of the box, and its temperature probe measures the tap water temperature at the bottom of the box, which is closer to the water temperature flowing out through the cold water pipe.

[0016] Preferably, the inner wall of the box is in close contact with the outer wall of the insulation layer.

[0017] In the utility model, the insulation layer is made of a composite of polyurethane foam and polystyrene materials, and the thickness of the insulation layer is not less than 2 cm. The inner wall of the insulation layer is bonded with stainless steel to enhance its thermal insulation and corrosion resistance and increase the service life of the waste heat recovery device.

[0018] Preferably, the cooling pipe is in the shape of a multi-layer spring and is located at the center of the box body.

[0019] In the utility model, the cooling pipe is made into a multi-layer spring shape, the contact area between the cooling pipe and the tap water inside the box is increased, the heat exchange efficiency is enhanced, the cooling effect of the cooling pipe is increased, and the cooling pipe is located at the center of the box, so that the cooling of the cooling pipe (2) is more uniform.

[0020] Preferably, a valve is provided at the upper end of the filter assembly and a plurality of filter screens are provided inside the tube wall.

[0021] In the utility model, the water entering the cooling pipe and the inside of the box is filtered by the filter net in the filter assembly to prevent external fine dust from entering the cooling pipe and the box to cause damage and blockage, thereby reducing the service life of the waste heat recovery device. The valve is used for the user to control the water entering the cooling pipe and the box.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The utility model increases the contact area with the coolant through multi-layer spring-shaped cooling pipes, increases the heat exchange efficiency of the device, increases the waste heat recovery effect, and increases the heat preservation effect of the waste heat recovery device by arranging a heat preservation layer made of composite heat preservation material with a thickness of not less than 2 cm. By arranging a filter assembly containing a plurality of filter nets at the inlet and outlet of each water pipe, fine dust and impurities entering the box and the cooling pipe are filtered, thereby increasing the service life of the device;

[0024] 2. The utility model provides a water level window at the front end of the outer wall of the box body to facilitate adding tap water into the box body, and provides a thermometer near the bottom of the outer wall of the box body to facilitate the user to observe the tap water temperature inside the box body in real time, maintain the tap water temperature, and maintain the cooling effect of the cooling pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the open state of the utility model;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the filter assembly of the utility model.

[0029] The meaning of each number in the figure is:

[0030] 1. Box body; 10. Insulation layer; 11. Box cover; 110. Handle; 12. Support foot; 13. Thermometer; 14. Water level window;

[0031] 2. Cooling pipe; 20. Hot water pipe; 21. Cold water pipe;

[0032] 3. Water inlet pipe; 30. Faucet;

[0033] 4. Filter assembly; 40. Filter screen; 41. Valve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] See also Figure 1-Figure 4 , this embodiment provides a technical solution:

[0036] A waste heat recovery device for a water ring vacuum pump comprises a box body 1. The inner wall of the box body 1 is provided with a heat preservation layer 10. The inner wall of the box body 1 is closely fitted with the outer wall of the heat preservation layer 10.

[0037] In the utility model, the insulation layer 10 is made of a composite of polyurethane foam and polystyrene materials, and the thickness of the insulation layer 10 is not less than 2 cm. The inner wall of the insulation layer 10 is bonded with stainless steel to enhance its thermal insulation and corrosion resistance and increase the service life of the waste heat recovery device.

[0038] It should be noted that a box cover 11 is provided at the top of the box body 1, and the box cover 11 is rotatably connected to the box body 1 through a hinge. A handle 110 is provided at the front end of the box cover 11, and the handle 110 and the box cover 11 are integrally formed.

[0039] In the utility model, the handle 110 is provided to facilitate opening the box cover 11, so as to facilitate rapid addition of water to the inside of the net box body 1 or replacement of damaged parts.

[0040] Furthermore, a water level window 14 is provided at the front center of the box body 1 , the top surface of the water level window 14 should be higher than the water inlet of the hot water pipe 20 , and the outer wall of the water level window 14 is tightly bonded and fixed to the opening of the box body 1 and the insulation layer 10 .

[0041] In the utility model, a water level window 14 is provided to facilitate direct observation of the water level inside the box 1, and tap water inside the box 1 is added in time. The water level window 14 is higher than the water inlet of the hot water pipe 20, which makes it convenient to fill the inside of the box 1 with tap water. The tap water submerges the cooling pipe 2, increases the contact area between the cooling pipe 2 and the tap water, and increases the waste heat recovery rate.

[0042] Specifically, a faucet 30 is provided on the left side of the water level window 14 near the bottom of the box body 1 , and the water inlet of the faucet 30 penetrates the box body 1 and the insulation layer 10 and extends to the inside of the insulation layer 10 , and the outer wall of the faucet 30 is welded and fixed to the box body 1 at the contact point.

[0043] In the utility model, a faucet 30 is provided to facilitate taking heated tap water, so that residual heat can be utilized, and at the same time new tap water flows in through the water inlet pipe 3 to maintain the cooling effect of the cooling pipe 2.

[0044] It should be noted that a thermometer 13 is provided on the right side of the water level window 14 , a temperature probe of the thermometer 13 penetrates the box body 1 and the insulation layer 10 and extends to the inside of the insulation layer 10 , and a display screen of the thermometer 13 is bonded and fixed to the surface of the box body 1 .

[0045] In the utility model, by setting the thermometer 13, the user can understand the temperature of the tap water inside the box 1 in real time, which is convenient for timely replacement of the tap water and maintaining the cooling effect. At the same time, the thermometer 13 is close to the bottom of the box 1, and its temperature probe measures the tap water temperature at the bottom of the box 1, which is closer to the water temperature flowing out through the cold water pipe 21.

[0046] Secondly, a number of supporting legs 12 are welded to the bottom of the box body 1, a hot water pipe 20 is welded to the left side of the box body 1 near the top, a cold water pipe 21 is welded to the right side of the box body 1 near the bottom, and a cooling pipe 2 is welded between the water outlet of the hot water pipe 20 and the water inlet of the cold water pipe 21. The cooling pipe 2 is in the shape of a multi-layer spring and is located at the center of the box body 1.

[0047] In the utility model, the cooling tube 2 is made into a multi-layer spring shape, the contact area between the cooling tube 2 and the tap water inside the box 1 is increased, the heat exchange efficiency is enhanced, the cooling effect of the cooling tube 2 is increased, and the cooling tube 2 is located at the center of the box 1, so that the cooling of the cooling tube 2 is more uniform.

[0048] Finally, it should be said that a water inlet pipe 3 is provided on the left side of the box body 1 near the front end, and filter components 4 are provided at the water inlet of the hot water pipe 20, the water outlet of the cold water pipe 21, and the water inlet of the water inlet pipe 3. A valve 41 is provided at the upper end of the filter component 4, and several filter nets 40 are provided inside the pipe wall.

[0049] In the utility model, the filter net 40 in the filter assembly 4 filters the water entering the cooling pipe 2 and the inside of the box 1, preventing external fine dust from entering the cooling pipe 2 and the box 1 to cause damage and blockage, thereby reducing the service life of the waste heat recovery device. The valve 41 is used to facilitate the user to control the water entering the cooling pipe 2 and the box 1.

[0050] When using a waste heat recovery device for a water ring vacuum pump in this embodiment, the user first rotates the box cover 11 to connect it to the box body 1 through a hinge, opens the box cover 11 through the handle 110, puts the cooling pipe 2 into the center of the box body 1, sets the filter assembly 4 on the water inlet of the water inlet pipe 3, the water outlet of the cold water pipe 21, and the water inlet of the water inlet pipe 3, passes the water outlet of the hot water pipe 20 through the box body 1 and the insulation layer 10 and is welded to the upper end opening of the cooling pipe 2, and the water inlet of the cold water pipe 21 is welded to the other end of the cooling pipe 2. , pass the water inlet pipe 3 of the faucet 30 through the box body 1 and the insulation layer 10, extend it to the inside of the box body 1 close to the bottom of the inside of the box body 1, pass the temperature probe of the thermometer 13 through the box body 1 and the insulation layer 10, extend it to the inside of the box body 1 close to the bottom of the inside of the box body 1, pass the water outlet of the water inlet pipe 3 through the box body 1 and the insulation layer 10, extend it to the top of the inside of the box body 1, connect the water inlet pipe 3, put tap water into the inside of the box body 1, check whether there is water leakage at the interfaces of each component of the device, if there is water leakage, weld and seal the position;

[0051] When the waste heat recovery device of the water ring vacuum pump is needed, the user first connects the water inlet end of the water inlet pipe 3 to the tap water, connects the water inlet end of the hot water pipe 20 to the water outlet end of the water ring vacuum pump, connects the water outlet end of the cold water pipe 21 to the water inlet end of the water ring vacuum pump, turns the valve 41 at the water inlet end of the water inlet pipe 3, opens the water inlet pipe 3 to pour tap water into the inside of the box 1 until the top of the cooling pipe 2 is submerged, turns the valve 41 at the water inlet end of the hot water pipe 20 and the valve 41 at the water outlet end of the cold water pipe 21 to let the heated water in the water ring vacuum pump flow into the cooling pipe 2 for cooling and waste heat recovery;

[0052] When the user observes that the temperature displayed on the thermometer 13 is higher than the initial temperature, the user opens the faucet 30 to allow the heated tap water to flow out of the box 1. The heated tap water is used for domestic water. The user closes the faucet 30 and then opens the water inlet pipe 3 to allow low-temperature tap water to flow into the box 1. The user observes through the water level window 14 until the tap water submerges the top of the cooling pipe 2, and then closes the water inlet pipe 3.

[0053] When the cooling pipe 2 inside the box body 1 fails, open the faucet 30 to release the tap water inside the box body 1, close the hot water pipe 20 and the cold water pipe 21, hold the handle 110 to open the box cover 11, replace the cooling pipe 2, close the box cover 11, close the faucet 30, open the water inlet pipe 3 to submerge the top of the cooling pipe 2 with tap water, and close the water inlet pipe 3.

Claims

1. A waste heat recovery device for a water ring vacuum pump, comprising a housing (1), characterized in that: The inner wall of the box body (1) is provided with a heat-insulating layer (10); the top of the box body (1) is provided with a box cover (11); the box cover (11) is rotatably connected to the box body (1) via a hinge; a plurality of supporting legs (12) are welded to the bottom surface of the box body (1); a hot water pipe (20) is welded to the left side of the box body (1) near the top end; a cold water pipe (21) is welded to the right side of the box body (1) near the bottom end; a cooling pipe (2) is welded between the water outlet of the hot water pipe (20) and the water inlet of the cold water pipe (21); a water inlet pipe (3) is provided to the left side of the box body (1) near the front end; and a filter assembly (4) is provided at the water inlet of the hot water pipe (20), the water outlet of the cold water pipe (21), and the water inlet of the water inlet pipe (3).

2. The waste heat recovery device for a water ring vacuum pump according to claim 1 is characterized in that: A handle (110) is provided at the front end of the box cover (11), and the handle (110) and the box cover (11) are integrally formed.

3. The waste heat recovery device for a water ring vacuum pump according to claim 1 is characterized in that: A water level window (14) is provided at the center of the front end of the box body (1), the top surface of the water level window (14) should be higher than the water inlet of the hot water pipe (20), and the outer wall of the water level window (14) is tightly bonded and fixed to the opening of the box body (1) and the insulation layer (10).

4. The waste heat recovery device for a water ring vacuum pump according to claim 3 is characterized in that: A faucet (30) is provided on the left side of the water level window (14) near the bottom of the box body (1); the water inlet of the faucet (30) penetrates the box body (1) and the insulation layer (10) and extends into the interior of the insulation layer (10); the outer wall of the faucet (30) is welded and fixed to the box body (1) at the contact point.

5. The waste heat recovery device for a water ring vacuum pump according to claim 3 is characterized in that: A thermometer (13) is provided on the right side of the water level window (14); a temperature probe of the thermometer (13) penetrates the box body (1) and the thermal insulation layer (10) and extends into the interior of the thermal insulation layer (10); and a display screen of the thermometer (13) is bonded and fixed to the surface of the box body (1).

6. The waste heat recovery device for a water ring vacuum pump according to claim 1, characterized in that: The inner wall of the box body (1) is tightly fitted to the outer wall of the thermal insulation layer (10).

7. The waste heat recovery device for a water ring vacuum pump according to claim 1 is characterized in that: The cooling pipe (2) is in the shape of a multi-layer spring and is located at the center of the box body (1).

8. The waste heat recovery device for a water ring vacuum pump according to claim 1, characterized in that: The upper end of the filter assembly (4) is provided with a valve (41) and the interior of the tube wall is provided with a plurality of filter screens (40).

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