A wastewater heat energy recovery system for eyeglass lens cleaning machine

Abstract

The present invention discloses a wastewater heat energy recovery and utilization system of an eyeglass lens cleaning machine, comprising a cleaning tank, a sub-tank, a pure water replenishment pipeline and a soft water replenishment pipeline, wherein the cleaning tank is connected to the sub-tank, the pure water replenishment pipeline and the soft water replenishment pipeline replenish water to the sub-tank respectively, and the sub-tank discharges wastewater; the wastewater discharged from the sub-tank flows into a wastewater collection box, the wastewater in the wastewater collection box is discharged through a heat exchanger, and the pure water replenishment pipeline and the soft water replenishment pipeline heat the new water in the pipeline through the heat exchanger respectively. Beneficial effect: The present invention collects wastewater with heat through a wastewater collection box, recovers heat energy in the wastewater through a heat exchanger, and uses it to heat newly replenished pure water and soft water. The present invention effectively reduces energy consumption and saves the production cost of lenses.

Description

Technical Field

[0001] The invention relates to an energy recovery and utilization system, in particular to a wastewater heat energy recovery and utilization system of a spectacle lens cleaning machine, and belongs to the technical field of spectacle lens processing equipment. Background Art

[0002] With the development of the eyeglass lens industry, today's lenses are becoming thinner, more durable, and more functional. These properties are usually achieved by the surface coating of the lens. However, the cleaning process is essential before the lens is coated. Currently, a special eyeglass lens cleaning machine is usually used for cleaning. In order to ensure the cleaning effect, the cleaning liquid needs to be heated, the temperature of the cleaning liquid is controlled within a certain range, and new cleaning liquid needs to be constantly replaced. Therefore, in the process of replacing the cleaning liquid, the wastewater takes away a lot of heat energy, and the newly added cleaning liquid needs to be heated. The replacement process of the cleaning liquid causes a lot of energy loss, which increases the production cost of the lens. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to overcome the defects of the prior art and provide a wastewater heat energy recovery and utilization system for eyeglass lens cleaning machines. The present invention can recover the heat energy in the cleaning wastewater and use the heat energy for heating new water, thereby reducing energy consumption and saving the production cost of lenses.

[0004] Technical solution: A wastewater heat energy recovery and utilization system for an eyeglass lens cleaning machine, comprising a cleaning tank, a sub-tank, a pure water replenishment pipeline and a soft water replenishment pipeline, the cleaning tank is connected to the sub-tank, the pure water replenishment pipeline and the soft water replenishment pipeline respectively replenish water to the sub-tank, and the sub-tank discharges wastewater; the wastewater discharged from the sub-tank flows into a wastewater collection box, the wastewater in the wastewater collection box is discharged through a heat exchanger, and the pure water replenishment pipeline and the soft water replenishment pipeline respectively pass through the heat exchanger to heat the new water in the pipeline. During the lens cleaning operation, a group of lenses are immersed in a cleaning tank, and the cleaning liquid in the cleaning tank overflows into the auxiliary tank, and the part of the liquid level in the auxiliary tank that rises is discharged through the overflow of the heated cleaning liquid; after the lens cleaning is completed, the lens is removed, and the pure water replenishment pipeline and the soft water replenishment pipeline replenish pure water and soft water respectively into the auxiliary tank. In the existing cleaning process, the heated cleaning liquid is directly discharged as waste water, and the newly replenished pure water and soft water need to be heated before use, resulting in a large amount of energy loss; the present invention collects waste water with heat through a waste water collection box, and recovers the heat energy in the waste water through a heat exchanger to heat the newly replenished pure water and soft water. The present invention effectively reduces energy consumption and saves the production cost of lenses.

[0005] Preferably, in order to increase the service life of the device, a front filter is provided in the pipeline at the front end of the water inlet of the wastewater collection box, and a rear filter is provided at the water outlet of the wastewater collection box. The front filter can filter larger solid waste in the wastewater to prevent waste deposition in the wastewater collection box from affecting the effective volume, and the rear filter can filter finer impurities in the wastewater to avoid blockage of the heat exchanger, effectively increasing the service life of the device.

[0006] Preferably, in order to ensure the normal operation of the cleaning machine, a drainage pipeline with a drainage valve is provided in the wastewater collection box. When the wastewater in the wastewater collection box reaches the maximum value, the drainage valve is opened, and the wastewater is directly discharged through the drainage pipeline, ensuring that the cleaning liquid in the cleaning machine can be circulated and replaced.

[0007] Preferably, in order to improve the degree of automation, a liquid level sensor is provided in the wastewater collection box, and the liquid level sensor controls the switch of the drain valve. The liquid level in the wastewater collection box is monitored by the liquid level sensor, and when the liquid level reaches the set value, the drain valve is opened to drain, and when the liquid level does not reach the set value, the drain valve is closed; thus, automatic control of the liquid level in the wastewater collection box is realized.

[0008] Preferably, in order to improve the heat exchange efficiency, a water pump is provided on the pipeline between the wastewater collection tank and the heat exchanger. The water pump pumps the wastewater with heat energy in the wastewater collection tank into the heat exchanger, effectively improving the efficiency of heat exchange.

[0009] Preferably, in order to facilitate the maintenance and replacement of the heat exchanger, a water inlet valve is provided in the water inlet pipeline of the heat exchanger, and a water outlet valve is provided in the water outlet pipeline of the heat exchanger. When the heat exchanger needs to be repaired or replaced, it can be completed by simply closing the water inlet valve and the water outlet valve. If there are multiple groups of heat exchangers, the water inlet valve and the water outlet valve can be installed in each branch pipeline respectively.

[0010] Preferably, in order to save installation space, the heat exchanger is a set of plate heat exchangers, and the pure water supply pipeline and the soft water supply pipeline are connected to the wastewater collection box for heat exchange. If the installation space is limited, and in order to ensure the heat exchange efficiency, a set of plate heat exchangers can be used, and a set of wastewater pipelines pass through the plate heat exchanger to heat the pure water supply pipeline and the soft water supply pipeline at the same time, thereby ensuring the heat exchange effect and saving the installation space.

[0011] Preferably, in order to further improve the heat exchange efficiency, the heat exchanger includes at least two sets of parallel plate heat exchangers, and the heat exchange pipelines connected to the wastewater collection box enter the parallel plate heat exchangers respectively, and the parallel plate heat exchangers heat the pure water replenishment pipeline and the soft water replenishment pipeline respectively. By heating the pure water replenishment pipeline and the soft water replenishment pipeline respectively through the parallel plate heat exchangers, the heat exchange efficiency can be effectively improved.

[0012] Preferably, in order to facilitate maintenance of a single plate heat exchanger, an auxiliary water inlet valve is provided in the water inlet pipeline of the plate heat exchangers connected in parallel. When a plate heat exchanger is blocked or damaged, it is only necessary to close the auxiliary water inlet valve of the pipeline, which does not affect the normal operation of other plate heat exchangers, thereby improving the convenience of maintenance.

[0013] Beneficial effects: The present invention collects wastewater with heat through a wastewater collection box, and recovers heat energy in the wastewater through a heat exchanger to heat newly added pure water and soft water. The present invention effectively reduces energy consumption and saves the production cost of lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural principle diagram of the present invention. DETAILED DESCRIPTION

[0015] Embodiments will be described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, a wastewater heat energy recovery and utilization system of an eyeglass lens cleaning machine includes a cleaning tank 1, a sub-tank 2, a pure water replenishment pipeline 3 and a soft water replenishment pipeline 4, the cleaning tank 1 is connected to the sub-tank 2, the pure water replenishment pipeline 3 and the soft water replenishment pipeline 4 respectively replenish water to the sub-tank 2, and the sub-tank 2 discharges wastewater; it is characterized in that: the wastewater discharged from the sub-tank 2 flows into a wastewater collection box 5, the wastewater in the wastewater collection box 5 is discharged through a heat exchanger 6, and the pure water replenishment pipeline 3 and the soft water replenishment pipeline 4 respectively heat the new water in the pipeline through the heat exchanger 6. During the lens cleaning operation, a group of lenses are immersed in the cleaning tank 1, and the cleaning liquid in the cleaning tank 1 overflows into the auxiliary tank 2. The part of the liquid level in the auxiliary tank 2 that rises is discharged through the overflow of the heated cleaning liquid; after the lens cleaning is completed, the lens is removed, and the pure water replenishment pipeline 3 and the soft water replenishment pipeline 4 replenish pure water and soft water into the auxiliary tank 2 respectively. In the existing cleaning process, the heated cleaning liquid is directly discharged as waste water, and the newly replenished pure water and soft water need to be heated before use, resulting in a large amount of energy loss; the present invention collects waste water with heat through the waste water collection box 5, and recovers the heat energy in the waste water through the heat exchanger 6 to heat the newly replenished pure water and soft water. The present invention effectively reduces energy consumption and saves the production cost of lenses.

[0017] In order to improve the service life of the device, a front filter 7 is provided in the pipeline at the front end of the water inlet of the wastewater collection box 5, and a rear filter 8 is provided at the water outlet of the wastewater collection box 5. The front filter 7 can filter larger solid waste in the wastewater to prevent waste deposition in the wastewater collection box 5 from affecting the effective volume, and the rear filter 8 can filter finer impurities in the wastewater to prevent the heat exchanger 6 from being blocked, thereby effectively improving the service life of the device.

[0018] In order to ensure the normal operation of the cleaning machine, a drainage pipeline with a drainage valve 9 is provided in the wastewater collection box 5. When the wastewater in the wastewater collection box 5 reaches the maximum value, the drainage valve 9 is opened, and the wastewater is directly discharged through the drainage pipeline to ensure that the cleaning liquid in the cleaning machine can be circulated and replaced.

[0019] In order to improve the degree of automation, a liquid level sensor 10 is provided in the wastewater collection box 5, and the liquid level sensor 10 controls the switch of the drain valve 9. The liquid level in the wastewater collection box 5 is monitored by the liquid level sensor 10. When the liquid level reaches a set value, the drain valve 9 is opened to drain water, and when the liquid level does not reach the set value, the drain valve 9 is closed; thus, automatic control of the liquid level in the wastewater collection box 5 is realized.

[0020] In order to improve the heat exchange efficiency, a water pump 11 is provided on the pipeline between the wastewater collection tank 5 and the heat exchanger 6. The water pump 11 pumps the wastewater with heat energy in the wastewater collection tank 5 into the heat exchanger 6, effectively improving the efficiency of heat exchange.

[0021] In order to facilitate the maintenance and replacement of the heat exchanger, a water inlet valve 12 is provided in the water inlet pipeline of the heat exchanger 6, and a water outlet valve 13 is provided in the water outlet pipeline of the heat exchanger 6. When the heat exchanger 6 needs to be repaired or replaced, it can be completed by simply closing the water inlet valve 12 and the water outlet valve 13.

[0022] In order to further improve the heat exchange efficiency, the heat exchanger 6 includes two sets of plate heat exchangers connected in parallel, and the heat exchange pipelines connected to the wastewater collection box 5 enter the parallel plate heat exchangers respectively, and the parallel plate heat exchangers respectively heat the pure water replenishment pipeline 3 and the soft water replenishment pipeline 4. By heating the pure water replenishment pipeline and the soft water replenishment pipeline respectively through the parallel plate heat exchangers, the heat exchange efficiency can be effectively improved.

[0023] In order to facilitate the maintenance of a single plate heat exchanger, an auxiliary water inlet valve 14 is provided in the water inlet pipeline of the plate heat exchangers connected in parallel with the heat exchanger 6. When a plate heat exchanger is blocked or damaged, it is only necessary to close the auxiliary water inlet valve 14 of the pipeline, which does not affect the normal operation of other plate heat exchangers, thereby improving the convenience of maintenance.

[0024] In order to save installation space, the heat exchanger 6 is a set of plate heat exchangers, and the pure water supply pipeline 3 and the soft water supply pipeline 4 are connected to the wastewater collection box 5 to exchange heat. If the installation space is limited, and in order to ensure the heat exchange efficiency, a set of plate heat exchangers can be used, and a set of wastewater pipelines pass through the plate heat exchanger to heat the pure water supply pipeline and the soft water supply pipeline at the same time, thereby ensuring the heat exchange effect and saving the installation space.

Claims

1. A wastewater heat energy recovery and utilization system for an eyeglass lens cleaning machine, comprising a cleaning tank (1), a sub-tank (2), a pure water replenishment pipeline (3) and a soft water replenishment pipeline (4), wherein the cleaning tank (1) is connected to the sub-tank (2), the pure water replenishment pipeline (3) and the soft water replenishment pipeline (4) respectively replenish water to the sub-tank (2), and the sub-tank (2) discharges wastewater; the wastewater discharged from the sub-tank (2) flows into a wastewater collection box (5), the wastewater in the wastewater collection box (5) is discharged through a heat exchanger (6), and the pure water replenishment pipeline (3) and the soft water replenishment pipeline (4) respectively heat new water in the pipelines through the heat exchanger (6); Features: The heat exchanger (6) is a set of plate heat exchangers, and the pure water supply pipeline (3) and the soft water supply pipeline (4) are connected to the wastewater collection tank (5) to perform heat exchange; The heat exchanger (6) comprises at least two groups of parallel plate heat exchangers, the heat exchange pipelines connected to the wastewater collection box (5) respectively enter the parallel plate heat exchangers, and the parallel plate heat exchangers respectively heat the pure water replenishment pipeline (3) and the soft water replenishment pipeline (4); A secondary water inlet valve (14) is provided in the water inlet pipeline of the plate heat exchangers connected in parallel with the heat exchangers (6).

2. The wastewater heat energy recovery and utilization system of the eyeglass lens cleaning machine according to claim 1, characterized in that: A front filter (7) is provided in the pipeline at the front end of the water inlet of the wastewater collection box (5), and a rear filter (8) is provided at the water outlet of the wastewater collection box (5).

3. The wastewater heat energy recovery and utilization system of the eyeglass lens cleaning machine according to claim 1 or 2, characterized in that: A drainage pipeline with a drainage valve (9) is provided in the wastewater collection box (5).

4. The wastewater heat energy recovery and utilization system of the eyeglass lens cleaning machine according to claim 3 is characterized in that: A liquid level sensor (10) is provided in the wastewater collection box (5), and the liquid level sensor (10) controls the switch of the drain valve (9).

5. The wastewater heat energy recovery and utilization system of the eyeglass lens cleaning machine according to claim 1, characterized in that: A water pump (11) is provided on the pipeline between the wastewater collection tank (5) and the heat exchanger (6).

6. The wastewater heat energy recovery and utilization system of the eyeglass lens cleaning machine according to claim 1, characterized in that: A water inlet valve (12) is provided in the water inlet pipeline of the heat exchanger (6), and a water outlet valve (13) is provided in the water outlet pipeline of the heat exchanger (6).

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