Wastewater solid-liquid separation structure and separation method thereof

Abstract

The present application relates to sewage treatment technical field, specifically, it relates to a kind of wastewater solid-liquid separation structure and separation method thereof.Processing device includes sewage tank and liquid supply device, the inner partition and outer partition with inside sewage tank are separated into liquid supply storehouse, heating storehouse, separation storehouse and stationary storehouse in sewage tank, is provided with liquid collection mechanism in the top of heating storehouse, and liquid collection mechanism includes gas conveying part and temperature sensing part.Through the cold gas conveyed in cold box, solidified grease is separated from sewage, and it is guided to downward channel in the grease discharged by heating storehouse by interface board, change the moving path of grease, while cold gas provides cold quantity for hot gas in liquid storage box, using condensed liquid forces memory spring to push push plate to move, push plate pushes solidified grease to distal end to form isolation to solidified grease, and grease from downward channel is received, so as to avoid solidified grease to form obstruction to newly injected grease, improve the processing efficiency of grease.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a wastewater solid-liquid separation structure and a separation method thereof. BACKGROUND

[0002] In the oil-containing sewage in kitchen waste, the composition and form of oil are complex, mainly in the form of suspended oil, dispersed oil, emulsified oil, dissolved oil and oil-containing solid waste, among which the most difficult to handle is high-concentration emulsified oil.

[0003] At present, the Chinese patent publication No. CN115536199A proposes a kitchen waste wastewater oil stain filtering and processing device and method, which includes an oil filter pool body, chain wheels are arranged on both sides of the oil filter pool body, and a power member is arranged on the chain wheels, wherein a scraper is arranged on the chain wheels, and the device further includes a processing assembly arranged in the oil filter pool body, an adding assembly arranged in the oil filter pool body, and a control assembly arranged in the oil filter pool body and used for controlling the processing assembly through the action of the scraper. The kitchen waste wastewater oil stain filtering and processing device and method prevent the oil that is condensed into a solid state from hindering the oil under water by using the processing assembly.

[0004] During the process of scraping the upper oil in the sewage into the oil storage area, the scraper will scrape the oil and sewage into the oil storage area at the same time, which will cause the oil and sewage to mix together and cannot be separated. When the oil storage area encounters cold weather, the oil is easy to solidify, which will cause the solidified oil to hinder the newly injected oil and sewage, which is not conducive to the stratification of oil stains and sewage, and further affects the separation of oil stains and sewage. SUMMARY

[0005] The present application provides a wastewater solid-liquid separation structure, which uses condensed liquid to force the memory spring to push the push plate to move, the push plate pushes the solidified oil to the distal end to form isolation, and receives the oil from the feeding channel, avoiding the solidified oil from hindering the newly injected oil, thereby solving the problems raised in the above background technology, i.e.

[0006] To achieve the above object, the wastewater solid-liquid separation structure includes a sewage tank and a liquid supply device, an inner partition plate and an outer partition plate inside the sewage tank divide the sewage tank into a liquid supply compartment, a heating compartment, a separation compartment and a standing compartment, a liquid collecting mechanism is arranged on the top of the heating compartment, the liquid collecting mechanism includes a gas conveying part and a temperature sensing part, the gas conveying part is covered on the inner partition plate and is used to guide the evaporated gas in the heating compartment to the liquid storage box in the separation compartment, when the liquid level in the separation compartment reaches the preset discharge amount, the cold supply mechanism arranged outside the liquid storage box is used, the cold supply mechanism can guide the grease discharged from the heating compartment to the separation compartment into the separation compartment, and cool the hot gas conveyed in the liquid storage box to drive the temperature sensing part in the liquid storage box to move by using the cold energy of the condensed water droplets, the temperature sensing part is used to push the solidified grease in the separation compartment to the far end to receive the grease discharged from the heating compartment to the separation compartment.

[0007] When cold gas is introduced into the cold box, a discharging channel for discharging the grease into the separation compartment is formed between the partition plate and the liquid storage box, the partition plate corresponding to the cold box has an exhaust box movably arranged at the end of the partition plate, the exhaust box is in communication with the opening in the discharging channel, and the end of the partition plate and the cold box are elastically connected with a compression spring;

[0008] The temperature sensing part includes a push plate arranged below the partition plate and attached to the partition plate, and a memory spring in the liquid storage box, the memory spring is located in the groove formed by the inner partition plate, and the groove is close to the bottom of the liquid storage box, the lower end of the push plate extends into the grease and is used to push the grease layer away from the liquid storage box, a slide rod is fixedly arranged between the push plate and the memory spring, and the slide rod penetrates through the side wall of the liquid storage box; at this time, based on Figure 5 and in combination with Figure 7 and Figure 8 , the liquid condensed at the connection between the gas guide pipe and the liquid storage box blocks the hot gas from being conveyed into the cold box, the liquid level overflows the groove, the memory spring is in a soft state, the memory spring drives the slide rod to move, the push plate pushes the solidified grease that has not been melted to one side, the push plate moves away from the liquid storage box and is in communication with the discharging channel above, the grease on the discharging plate falls into the separation compartment, and the solidified grease that has not been melted does not form a barrier to the newly injected grease.

[0009] The second object of the application is to provide a separation method of the wastewater solid-liquid separation structure, including the following method steps:

[0010] S1, first inject domestic sewage into the standing compartment for standing, after a period of time, the liquid supply device pumps the sewage in the standing compartment into the liquid supply compartment, the sewage is discharged into the heating compartment through the liquid supply compartment, and the heater arranged in the heating compartment heats the sewage;

[0011] S2, the oil in the heating bin floats upward and is discharged into the separation bin, the cold box conducts cold to the oil, and the oil changes from liquid to solid at low temperature to form a solid oil layer floating on the sewage;

[0012] S3, when the oil in the separation bin reaches the preset discharge amount, the solidified oil is intercepted by the cold box, and the residual sewage in the separation bin is returned to the liquid supply bin.

[0013] Compared with the prior art, the beneficial effects of the present application are:

[0014] The cold gas transported in the cold box realizes the separation of solidified oil and sewage, and promotes the guide of the oil discharged from the heating bin into the downward channel by the partition plate, changes the moving path of the oil, and at the same time, the cold gas provides cold to the hot gas in the liquid storage box, and the condensed liquid forces the memory spring to push the push plate to move, the push plate pushes the solidified oil to the far end to form isolation, and receives the oil from the downward channel, so as to avoid the solidified oil from hindering the newly injected oil, and improve the processing efficiency of the oil. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional view of the overall structure of the present application;

[0016] Figure 2 It is a sectional view of the internal structure of the sewage tank of the present application;

[0017] Figure 3 It is a three-dimensional view of the gas collecting cover and gas collecting pipe structure of the present application;

[0018] Figure 4 It is a schematic diagram of the principle of the sewage conveying and pumping of the pressing plate of the present application;

[0019] Figure 5 It is a schematic diagram of the principle of the oil solidification of the present application;

[0020] Figure 6 It is a schematic diagram of the connection of the cold box and the partition plate of the present application;

[0021] Figure 7 It is a schematic diagram of the principle of the hot gas conveying from the liquid storage box to the cold box of the present application;

[0022] Figure 8 It is a schematic diagram of the oil flow of the present application.

[0023] The meanings of the various reference numerals in the drawings are as follows:

[0024] 100, sewage tank; 101, liquid supply device; 102, inner partition plate; 102a, downward plate; 103, outer partition plate; 103a, liquid supply bin; 104, heating bin; 105, separation bin; 106, hydraulic rod; 107, through hole; 108, first one-way valve; 109, conduit;

[0025] 110, liquid collecting mechanism; 111, gas collecting cover; 111a, discharge port; 112, gas collecting pipe; 113, liquid storage box; 113a, liquid discharging channel; 113b, liquid discharging pipe; 114, push plate; 115, memory spring;

[0026] 120, cold energy supplying mechanism; 121, cold energy box; 121a, liquid conveying pipe; 122, partition plate; 123, compression spring; 124, exhaust box; 125, air blower; 126, air guiding pipe; 127, exhaust pipe; 128, second one-way valve. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] The scraped plate can scrape the oil and sewage into the oil storage area at the same time, so that the oil and the sewage are mixed together and cannot be separated. When the oil storage area encounters cold weather, the oil is easy to solidify, which forms an obstruction to the newly injected oil and sewage, is not conducive to the stratification of the oil and the sewage, and further affects the separation of the oil and the sewage. The present application provides a waste water solid-liquid separation structure, as shown in Figures 1-3 The inner partition plate 102 and the outer partition plate 103 inside the sewage tank 100 separate the sewage tank 100 into a liquid supply compartment 103a, a heating compartment 104, a separation compartment 105 and a standing compartment. For details, please refer to Figure 2 As shown in the drawing, first of all, it needs to be clear that when injecting liquid, domestic sewage is first injected into the standing compartment for standing. After a period of time, the liquid supply device 101 pumps the sewage in the standing compartment into the liquid supply compartment 103a. The sediment is discharged through the sewage discharge pipe, and the sewage is discharged into the heating compartment 104 through the liquid supply compartment 103a. At the same time, the heater (not shown in the drawing) arranged in the heating compartment 104 heats the sewage, so that the oil in the heating compartment 104 floats upward and is discharged into the separation compartment 105. The oil is separated from the sewage in the separation compartment 105 and discharged from the separation compartment 105. The sewage remaining in the separation compartment 105 is returned to the liquid supply compartment 103a. The above process is the whole flow path of the sewage;

[0029] The following is gradually clarified, provided with a liquid collection mechanism 110 at the top of the heating bin 104, the liquid collection mechanism 110 includes a gas delivery part and a temperature sensing part, wherein the gas delivery part is communicated with the liquid storage box 113 provided in the separation bin 105, the gas delivery part is covered on the inner partition plate 102 and is used to guide the evaporated gas in the heating bin 104 into the liquid storage box 113, when the liquid level in the separation bin 105 reaches the preset discharge amount, the use of the cold supply mechanism 120 provided outside the liquid storage box 113 is matched, the cold supply mechanism 120 can guide the oil and fat discharged from the heating bin 104 into the separation bin 105, and cool the hot gas delivered in the liquid storage box 113, so as to drive the temperature sensing part in the liquid storage box 113 to move by using the cold energy of the condensed water droplets, and the temperature sensing part is used to push the solidified oil in the separation bin 105 to the far end to receive the oil and fat discharged from the heating bin 104 into the separation bin 105;

[0030] Firstly, the reason why the sewage in the liquid supply bin 103a can be discharged into the heating bin 104 is that the inner partition plate 102 has a through hole 107 communicating the liquid supply bin 103a and the heating bin 104 at the bottom close to the outer partition plate 103, the outer partition plate 103 is provided with a hydraulic rod 106 at the top, and the hydraulic rod 106 is provided with a pressing plate at the bottom to press the sewage in the liquid supply bin 103a into the heating bin 104; On the other hand, the through hole 107 is provided with a conduit 109 communicating the separation bin 105 and the liquid supply bin 103a, and the conduit 109 and the through hole 107 are both provided with a first one-way valve 108, the first one-way valve 108 in the through hole 107 is used to supply the sewage in the liquid supply bin 103a into the heating bin 104, and the first one-way valve 108 in the conduit 109 is used to return the sewage in the separation bin 105 into the liquid supply bin 103a;

[0031] Working principle: Before the sewage in the supply chamber 103a is pumped into the heating chamber 104, the pressure plate moves up to the top. Then, the supply device 101 pumps the sewage from the settling chamber into the supply chamber 103a for use. As the sewage is injected into the supply chamber 103a, the water levels in the supply chamber 103a and the heating chamber 104 rise synchronously until the maximum water level is reached. At this point, the sewage supply stops, and the electric heater in the heating chamber 104 is activated to heat the sewage, causing the grease in the sewage to float to the surface and form a grease layer. The pressure plate moves down, simultaneously pumping sewage into the heating chamber 104 and discharging the grease layer at the top of the heating chamber 104 into the separation chamber 105. The principle of placing it into the separation chamber 105 is as follows: the gas supply unit includes a gas collecting hood 111 fixedly installed on the inner partition 102 and a gas collecting pipe 112 connected to the gas collecting hood 111. One end of the gas collecting pipe 112 away from the gas collecting hood 111 is connected to the liquid storage box 113 to supply the gas evaporated in the liquid storage box 113 to the liquid storage box 113. The gas collecting hood 111 has a discharge port 111a. The discharge port 111a is flush with the top of the inner partition 102 located on one side of the liquid storage box 113. When the liquid level in the heating chamber 104 rises, the grease layer flows into the separation chamber 105 from the discharge port 111a, thereby achieving the initial separation of the grease layer in the heating chamber 104 from the sewage.

[0032] When the liquid level in the separation chamber 105 reaches the preset discharge volume, the accumulated wastewater at the bottom of the separation chamber 105 is pumped into the supply chamber 103a from the conduit 109 by the upward movement of the pressure plate (see reference). Figure 4 (As shown), so that it can be recycled later, reducing the oil content in the wastewater and improving the oil separation effect.

[0033] Secondly, because some wastewater from the heating chamber 104 is also discharged along with the grease layer during each discharge into the separation chamber 105, the grease in the separation chamber 105 will contain wastewater. This results in some wastewater being discharged along with the grease, causing waste. Therefore, based on... Figure 2 , Figure 3 Based on and combined Figure 5 The diagram illustrates the specific structure of the cooling supply mechanism 120. The cooling supply mechanism 120 includes a cooling box 121 with its interior in a conductive state and a dividing plate 122 that fits against the liquid storage box 113. One end of the cooling box 121 passes through the wastewater tank 100 and is connected to a blower 125 that supplies cooling air into the cooling box 121. The cooling box 121 is inclined. The dividing plate 122 is located at the end of the cooling box 121. Under normal conditions, the dividing plate 122 separates the grease layer in the separation chamber 105 from the liquid storage box 113. That is, as the liquid level in the separation chamber 105 continuously rises, when the liquid level reaches a preset discharge amount (i.e., when the liquid level reaches a preset discharge amount), the cooling supply mechanism 120 will continue to supply cooling air into the storage box 113. Figure 5As shown in F2, the oil layer to be solidified is formed on the top of the liquid surface, the partition plate 122 separates the oil layer from the liquid storage box 113, reduces the accumulation of oil around the liquid storage box 113, and causes the oil to gather in the middle;

[0034] During the process of the liquid level rising in the separation bin 105, the oil is prone to change from liquid to solid at low temperature. When the temperature drops, the oil will gradually solidify to form a solid oil layer floating on the sewage. Therefore, in order to reduce the solidification speed of the oil during the process of the liquid level rising, in combination with the fact that the oil is prone to solidify at low temperature, the present application is designed to Figure 6 and Figure 7 As shown in F2, the oil layer to be solidified is formed on the top of the liquid surface, the partition plate 122 separates the oil layer from the liquid storage box 113, reduces the accumulation of oil around the liquid storage box 113, and causes the oil to gather in the middle;

[0035] Before the oil layer is solidified, that is, during the process of forming the L1 liquid level, the oil entering the separation bin 105 is divided into two processes. One is that the sinking end of the discharge plate 102a is attached to one side of the partition plate 122, and the raised end of the inner partition plate 102 is fixedly arranged with the inner partition plate 102. In this state, the sinking end of the discharge plate 102a is attached to the partition plate 122, and the oil discharged from the discharge port 111a flows along the discharge plate 102a to the cold quantity box 121. The cold quantity box 121 has a plurality of liquid conveying pipes 121a inside for the oil to flow to the bottom of the separation bin 105, so as to guide the oil discharged from the discharge port 111a to the separation bin 105 for storage. At the same time, since the oil discharged from the heating bin 104 has a certain temperature, when the oil drops through the liquid conveying pipe 121a to the oil layer, it can also heat the oil layer. In addition, the potential energy of the dropping oil is used to impact the formed oil layer, which helps to break the state of the oil layer and delay the solidification speed.

[0036] Secondly, because the cold air is introduced into the cold box 121, the demarcation plate 122 and the liquid storage box 113 form a discharging channel 113a for discharging the oil to the separation chamber 105, the demarcation plate 122 corresponding to the cold box 121 has an exhaust box 124 movably arranged at the end of the demarcation plate 122, the exhaust box 124 is in communication with the opening of the discharging channel 113a, and the demarcation plate 122 is elastically connected with the compression spring 123 at the end of the cold box 121; therefore, when the oil does not reach the preset discharging amount, the liquid level is L1 at this time, and the oil layer is f1, the air blower 125 is started to send cold air (the cold air is derived from outdoor cold air) into the cold box 121, and then the solidification of the oil layer is carried out, and the cold air introduced into the cold box 121 blows to the side of the liquid storage box 113, under the influence of the force and the reaction, the cold air drives the demarcation plate 122 to move reversely against the elastic potential energy of the compression spring 123 (wherein the thrust generated by the air blower 125 under normal conditions depends on the design parameters, operating conditions and gas characteristics, and can be matched and designed according to the specific use and the compression spring 123, and the thrust generated by the air blower 125 is in the range of 50 N to 1000 N), so that the oil flowing through the discharging channel 113a is discharged into the separation chamber 105, thereby avoiding that the solid oil layer hinders the injection of new oil when the oil layer is solidified.

[0037] Further, since the opening diameter is larger than the pipe diameter of the exhaust pipe 127, when the cold air is sent into the cold box 121, the pressure in the cold box 121 is forced to increase, and the sent cold air is divided into two parts, one part of the cold air is directly discharged from the exhaust pipe 127, and the other part blows to the liquid storage box 113 to overcome the elastic potential energy of the compression spring 123 by using the thrust generated by the gas, so that the demarcation plate 122 is separated from the liquid storage box 113.

[0038] In the above process, since the hot gas in the liquid storage box 113 is in a flowing state, and the cold air flowing out of the opening can also cool the side wall of the liquid storage box 113, the hot gas will condense into liquid and collect at the bottom of the liquid storage box 113 after meeting the cold air, and although the hot gas is sent into the cold box 121, the hot gas has less influence on the cold air in the cold box 121 compared with the gas flowing in the cold box 121;

[0039] Then, returning to the state shown in Figure 4 , Figure 5 When the oil layer is solidified and shown as f2, the pressure plate moves upward to suck the sewage in the separation chamber 105 into the liquid supply chamber 103a through the conduit 109, so that the liquid level in the separation chamber 105 is lowered to L2, and then the pressure plate moves downward again to discharge the oil in the heating chamber 104 into the separation chamber 105.

[0040] At the same time, the rising of the condensed liquid level causes the temperature sensing part to move, and the specific structure of the temperature sensing part is disclosed below. The temperature sensing part includes a push plate 114 arranged below the partition plate 122 and attached to the partition plate 122, and a memory spring 115 located in the liquid storage box 113. The memory spring 115 is located in a groove formed by the inner partition plate 102, and the groove is close to the bottom of the liquid storage box 113. The lower end of the push plate 114 extends into the oil and is used to push the oil layer away from the liquid storage box 113. A sliding rod is fixedly arranged between the push plate 114 and the memory spring 115, and the sliding rod penetrates the side wall of the liquid storage box 113. At this time, based on Figure 5 and in combination with Figure 7 and Figure 8 , the condensed liquid blocks the connection between the air guide pipe 126 and the liquid storage box 113, and the hot gas can no longer be delivered into the cold box 121. The liquid level overflows the groove, causing the memory spring 115 to exhibit a soft phase (when there is no liquid in the liquid storage box 113, the memory spring 115 exhibits a hard phase, and when the liquid level overflows the memory spring 115, the memory spring 115 exhibits a soft phase). The memory spring 115 then pushes the sliding rod to move, and the push plate 114 pushes the un-melted solidified oil to one side, causing the push plate 114 to move away from the liquid storage box 113 and to be in communication with the upper discharge passage 113a. The oil that has fallen through the discharge plate 102a falls into the separation chamber 105, avoiding the formation of a barrier between the un-melted solidified oil and the newly injected oil.

[0041] That is, the cold gas delivered into the cold box 121 separates the solidified oil from the sewage, and causes the partition plate 122 to guide the oil discharged from the heating chamber 104 into the discharge passage 113a, changing the movement path of the oil. At the same time, the cold gas provides cold energy for the hot gas in the liquid storage box 113. The condensed liquid forces the memory spring 115 to push the push plate 114 to move, and the push plate 114 pushes the solidified oil to the far end to form an isolation between the solidified oil and the newly injected oil, thereby avoiding the formation of a barrier between the solidified oil and the newly injected oil, and improving the processing efficiency of the oil.

[0042] Then, the cold gas supply is stopped, and the partition plate 122 is reset. The solidified oil drops to the surface of the cold box 121. At this time, since the liquid discharge pipe 113b that penetrates the sewage tank 100 is connected to the bottom of the liquid storage box 113, a valve plate is arranged outside the sewage tank 100 on the side of the cold box 121 at the lower end. The valve plate is used to block the gap above the lower end of the cold box 121 to limit the overflow of the oil. By opening the liquid discharge pipe 113b, the liquid in the liquid storage box 113 is discharged, and the memory spring 115 is gradually reset. The hot gas is again in communication, and the valve plate is opened at this time. The hot gas at this time heats the solidified oil on the cold box 121 to cause the solidified oil to quickly separate from the cold box 121.

[0043] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A solid-liquid separation structure for wastewater, comprising a sewage tank (100) and a liquid supply device (101), wherein an inner partition plate (102) and an outer partition plate (103) are arranged inside the sewage tank (100) to divide the sewage tank (100) into a liquid supply compartment (103a), a heating compartment (104), a separation compartment (105) and a standing compartment, characterized in that: A liquid collecting mechanism (110) is arranged on the top of the heating bin (104), and the liquid collecting mechanism (110) comprises a gas conveying part and a temperature sensing part, wherein the gas conveying part is covered on the inner partition plate (102) and is used for guiding the evaporated gas in the heating bin (104) into the liquid storage box (113) arranged in the separation bin (105), and when the liquid level in the separation bin (105) reaches a preset discharge amount, the cold energy supply mechanism (120) arranged outside the liquid storage box (113) is used in cooperation, the cold energy supply mechanism (120) can guide the oil discharged from the heating bin (104) into the separation bin (105), and the hot gas conveyed in the liquid storage box (113) is cooled to drive the temperature sensing part in the liquid storage box (113) to move by using the cold energy of the condensed water droplets, and the temperature sensing part is used for pushing the solidified oil in the separation bin (105) to the far end to receive the oil discharged from the heating bin (104) into the separation bin (105); The gas conveying part comprises a gas collecting cover (111) fixedly arranged on the inner partition plate (102) and a gas collecting pipe (112) communicated with the gas collecting cover (111), one end of the gas collecting pipe (112) away from the gas collecting cover (111) is communicated with the liquid storage box (113) to supply the evaporated gas in the liquid storage box (113) into the liquid storage box (113), and the gas collecting cover (111) has a discharge port (111a) on the top, which is flush with the top of the inner partition plate (102) on one side of the liquid storage box (113); The cold energy supply mechanism (120) comprises a cold energy box (121) in a conductive state and a boundary plate (122) abutting the liquid storage box (113), one end of the cold energy box (121) is communicated with an air blower (125) for supplying cold air into the cold energy box (121) through the sewage tank (100), the cold energy box (121) is arranged in an inclined manner, and the boundary plate (122) is located at the end of the cold energy box (121), and in a normal state, the boundary plate (122) is used for separating the oil layer in the separation bin (105) from the liquid storage box (113); When the cold air is introduced into the cold energy box (121), the boundary plate (122) and the liquid storage box (113) form a discharging channel (113a) for discharging the oil into the separation bin (105), the boundary plate (122) corresponding to the cold energy box (121) has an exhaust box (124) movably arranged at the end of the boundary plate (122), the exhaust box (124) is communicated with the opening in the discharging channel (113a), the opening diameter is larger than the pipe diameter of the exhaust pipe (127), and the end of the boundary plate (122) and the cold energy box (121) are elastically connected with the compression spring (123); The temperature sensing part comprises a push plate (114) arranged below the partition plate (122) and attached to the partition plate (122), and a memory spring (115) located in the liquid storage box (113) and in a groove formed by the inner partition plate (102) and close to the bottom of the liquid storage box (113), the lower end of the push plate (114) extends into the oil and is used to push the oil layer away from the liquid storage box (113), a sliding rod is fixed between the push plate (114) and the memory spring (115), the sliding rod penetrates the side wall of the liquid storage box (113), and a liquid discharge pipe (113b) penetrating the sewage tank (100) is communicated at the bottom of the liquid storage box (113).

2. The wastewater solid-liquid separation structure according to claim 1, characterized in that: The inner partition plate (102) close to the outer partition plate (103) has a through hole (107) communicating the liquid supply bin (103a) and the heating bin (104), and the top of the outer partition plate (103) is provided with a hydraulic rod (106), and the bottom of the hydraulic rod (106) has a pressing plate for pressing the sewage in the liquid supply bin (103a) into the heating bin (104).

3. The wastewater solid-liquid separation structure according to claim 2, characterized in that: A conduit (109) communicating the separation bin (105) and the liquid supply bin (103a) is arranged above the through hole (107), and a first one-way valve (108) is arranged in the through hole (107) and the conduit (109), the first one-way valve (108) in the through hole (107) is used to supply the sewage in the liquid supply bin (103a) into the heating bin (104), and the first one-way valve (108) in the conduit (109) is used to return the sewage in the separation bin (105) to the liquid supply bin (103a).

4. The wastewater solid-liquid separation structure according to claim 1, characterized in that: A gas guide pipe (126) for supplying hot gas into the cold quantity box (121) is communicated between the back of the liquid storage box (113) and the cold quantity box (121), an exhaust pipe (127) is communicated with the cold quantity box (121) opposite to the gas guide pipe (126), the diameter of the exhaust pipe (127) is larger than that of the gas guide pipe (126), and a second one-way valve (128) is arranged in the gas guide pipe (126) to limit the backflow of gas in the cold quantity box (121).

5. The wastewater solid-liquid separation structure according to claim 1, wherein: The sinking end of the unloading plate (102a) is attached to one side of the partition plate (122), the lifting end of the inner partition plate (102) is fixedly arranged with the inner partition plate (102), and the cold quantity box (121) has a plurality of liquid delivery pipes (121a) for guiding the oil to flow to the bottom of the separation bin (105), so that the oil discharged from the discharge port (111a) is guided into the separation bin (105) for storage.

6. A separation method using the wastewater solid-liquid separation structure according to claim 1, characterized by, The method comprises the following steps: S1, first, domestic sewage is injected into the standing bin for standing, after a period of time, the sewage in the standing bin is pumped into the liquid supply bin (103a) by the liquid supply device (101), the sewage is discharged into the heating bin (104) through the liquid supply bin (103a), and the heater arranged in the heating bin (104) heats the sewage; S2, the oil in the heating bin (104) floats upward and is discharged into the separation bin (105), the cold quantity box (121) conducts cold quantity to the oil, so that the oil changes from liquid state to solid state at low temperature to form a solid oil layer floating on the sewage; S3. When the oil pollution in the separation chamber (105) reaches the preset discharge amount, the solidified grease is intercepted by the cold energy box (121), while the residual sewage in the separation chamber (105) flows back to the liquid supply chamber (103a).

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