Oil settling tank with plate heat exchanger

Abstract

The oil clarifying tank comprises a tank body, a power driving device, a slag salvaging transmission mechanism and a sieve plate, the slag salvaging transmission mechanism is annularly arranged along the left side, the bottom, the right side and the top of the interior of the tank body, and the sieve plate is horizontally arranged on the upper portion of the interior of the tank body and located below the top of the slag salvaging transmission mechanism. An oil inlet is formed in the upper portion of the right side of the box body, a plurality of plate heat exchangers located between the oil inlet and the oil outlet are arranged on the lower portion in the box body, the plate heat exchangers are arranged at intervals in the left-right direction or the front-back direction, and a slag discharging channel with the top open is arranged above the right side of the oil outlet in the box body. The left end edge of the sieve plate is located above the left side of the deslagging channel, and an outlet of the deslagging channel extends backwards out of the rear side of the box. According to the utility model, the principle is scientific, the heat energy of the pressed crude oil is fully utilized, the slag salvaging effect is also greatly improved, the oil liquid after oil clarification is clearer, the stress of the chain is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of edible oil processing, and in particular relates to an oil clarifier with a plate heat exchanger. Background Art

[0002] The raw materials of edible oil (rapeseed, peanuts, soybeans, etc.) are pressed and the crude oil is collected in the oil clarifier, and the naturally settled oil residue is scooped up and collected in the oil clarifier. The existing oil clarifier uses the liquid food filter squeezer disclosed in patent number 201620674939.0, which has the effect of clarifying oil, but there are still the following defects or deficiencies in the actual production process:

[0003] 1) Since the crude oil after pressing has a high temperature, the oil residue is difficult to sink in the high temperature crude oil, resulting in poor residue removal effect, and there is still a lot of residue in the oil passing through the oil outlet. In addition, the high temperature of the crude oil is not fully utilized, resulting in energy waste.

[0004] 2) The oil inlet hopper of the box is set at the top. When the crude oil enters through the oil inlet hopper, it directly falls down onto the moving chain and L-shaped scraper, which has a great impact on the chain. In addition, when the chain moves to the space between the inclined pressure plate and the screen plate to form an extrusion conveying space, the chain exerts downward extrusion force. There is no chain tensioning device on the box. Over time, the chain becomes looser and looser, friction occurs between the chain and the screen plate, resistance increases, and both the chain and the screen plate are subject to greater wear.

[0005] Therefore, there is an urgent need to improve the existing oil tank structure to solve the above defects or shortcomings. Utility Model Content

[0006] In order to solve the deficiencies in the prior art, the utility model provides an oil clarifier tank with a plate heat exchanger, which is easy for oil residue to settle, utilizes crude oil heat energy and has better oil clarification effect.

[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme: an oil clarifier tank with a plate heat exchanger, comprising a tank body, a power drive device, a slag scavenging transmission mechanism and a sieve plate, the power drive device is chain-drivenly connected to the slag scavenging transmission mechanism, the slag scavenging transmission mechanism is arranged in a ring shape along the left side, bottom, right side and top of the tank body, the sieve plate is horizontally arranged in the upper part of the tank body and below the top of the slag scavenging transmission mechanism, an oil inlet is arranged in the upper right part of the tank body, an oil outlet whose height is lower than the oil inlet is arranged in the upper left part of the tank body, a plurality of plate heat exchangers located between the oil inlet and the oil outlet are arranged in the lower part of the tank body, the plurality of plate heat exchangers are arranged at intervals in the left-right direction or in the front-back direction, the lower parts of the plurality of plate heat exchangers are connected to cooling water inlet pipes, the upper parts of the plurality of plate heat exchangers are connected to cooling water outlet pipes, a slag discharge channel with an open top is provided in the tank body above the right side of the oil outlet, the left end edge of the sieve plate is located above the left side of the slag discharge channel, and the outlet of the slag discharge channel extends backward out of the rear side of the tank body.

[0008] The power drive device includes a fixed frame fixed on the upper left side of the box body, a sliding frame which can slide in the left and right horizontal directions is arranged on the fixed frame, the sliding frame is fastened to the fixed frame by bolts, and a motor reducer is arranged on the sliding frame.

[0009] The slag scooping transmission mechanism comprises an upper left movable sprocket shaft, an upper right fixed sprocket shaft, a lower left fixed sprocket shaft and a lower right fixed sprocket shaft, all of which are arranged in the front-to-back direction; a tensioning adjustment mechanism for adjusting the left-to-right position of the upper left movable sprocket shaft is provided at the upper left corner of the casing; the upper left movable sprocket shaft, the upper right fixed sprocket shaft, the lower left fixed sprocket shaft and the lower right fixed sprocket shaft are respectively arranged at the upper left corner, the upper right corner, the lower left corner and the lower right corner of the casing; the front and rear sides of the upper left movable sprocket shaft, the upper right fixed sprocket shaft, the lower left fixed sprocket shaft and the lower right fixed sprocket shaft are connected by a chain transmission; a number of L-shaped slag scooping scrapers are fixedly provided between the front and rear chains.

[0010] The tensioning adjustment mechanism includes an upper horizontal guide rail and a lower horizontal guide rail arranged along the left and right directions, an adjustment frame is slidably arranged between the upper horizontal guide rail and the lower horizontal guide rail, the adjustment frame is provided with a bearing seat rotatably connected to the end of the upper left movable sprocket shaft, the left end of the adjustment frame is connected to an adjustment screw horizontally arranged along the left and right directions, the left ends of the upper horizontal guide rail and the lower horizontal guide rail are provided with a fixing plate, the left end of the adjusting screw passes through the fixing plate and is bolted with an adjusting nut, and the adjusting nut is crimped to the left side of the fixing plate through a grooved pad.

[0011] The cooling water inlet pipe and the cooling water outlet pipe are both arranged horizontally in the left and right directions. The cooling water inlet pipe is arranged on the front side outside the box body, and the cooling water outlet pipe is arranged on the rear side outside the box body. The lower front part of all plate heat exchangers is connected to the cooling water inlet pipe through the lower connecting pipe passing through the front side plate of the box body, and the upper rear part of all plate heat exchangers is connected to the cooling water outlet pipe through the upper connecting pipe passing through the rear side plate of the box body.

[0012] The plate heat exchanger includes two stainless steel thin plates arranged vertically and in parallel. The edges of the two adjacent stainless steel thin plates are welded together through sealing strips. Several supporting connecting blocks are arranged between the two adjacent stainless steel thin plates to form a cavity channel. Gas is injected and pressurized in the cavity channel to form several bulges on the outer surface of the stainless steel thin plates to increase the heat exchange area.

[0013] A manhole cover is provided at the lower part of the front side and / or rear side of the box body, and an observation mirror is provided at the front side and / or rear side of the box body.

[0014] By adopting the above technical scheme, the working principle and process of the utility model are as follows: the crude oil after the edible oil raw material is squeezed flows into the box body from the oil inlet, the slag in the crude oil settles freely, the motor reducer is started, the motor reducer drives the upper left active sprocket shaft to rotate, the upper active sprocket shaft drives the two chains to rotate, the upper right fixed sprocket shaft, the lower left fixed sprocket shaft and the lower right fixed sprocket shaft are all driven to rotate synchronously, and the several L-shaped slag scrapers between the two chains move to the bottom of the box body to remove the deposited slag The slag is scraped up and moves upward from the left side of the box until the slag is carried upward and falls onto the screen plate. The slag scraper scrapes the slag to the left along the screen plate, and the oil carried on the slag drips onto the crude oil surface in the box through the sieve holes on the screen plate. When the slag moves to the left to above the slag discharge channel, it automatically falls downward into the slag discharge channel. A slag extrusion auger can be arranged in the slag discharge channel, and the slag extrusion auger squeezes the oil contained in the slag and discharges it outside the box. The crude oil that becomes clear and free of slag after oil clarification is discharged from the oil outlet on the left. The scraper for scraping slag rotates continuously to pick up the slag from the bottom of the crude oil. At the same time, cold water enters the plate heat exchanger from the cooling water inlet pipe. The crude oil exchanges heat with the cold water through the plate heat exchanger. After the heat exchange, the water temperature of the cold water rises and is discharged from the cooling water outlet pipe. The temperature of the crude oil decreases, and the slag suspended in the crude oil is easier to settle. At the same time, the crude oil is blocked by the plate heat exchanger, and the flow speed of the crude oil from right to left in the box slows down. When passing through the plate heat exchanger, the slag will inevitably settle to the lower part first, which makes the slag scraper have a better slag removal effect.

[0015] The utility model scoops up the slag material and first passes through the natural oil filtration of the screen plate, then gathers it into the slag discharge channel, and then discharges the slag material and collects it after the oil is squeezed by the slag squeezing auger. The chain is no longer subjected to the squeezing force, which reduces the chain stress and reduces the load of the motor reducer.

[0016] The utility model is provided with a tension adjustment device, and the position of the upper left active sprocket shaft is adjusted by screwing the adjustment nut so that the adjustment screw pulls the adjustment frame to move left and right along the upper horizontal guide rail and the lower horizontal guide rail, that is, the tension of the chain is adjusted. After adjusting and positioning the position of the upper left active sprocket shaft, the position of the motor reducer needs to be adjusted, and the tension of the chain between the motor reducer and the upper left active sprocket shaft is adjusted by adjusting and fixing the position of the sliding frame on the fixed frame.

[0017] The plate heat exchanger is preferably arranged in the front-to-back direction, which plays a role in slowing down the rapid flow of crude oil from right to left. The plate heat exchanger is welded with two stainless steel sheets, and a sealing strip is welded between the edges of the two stainless steel sheets to form a closed cavity. A supporting connection block is arranged between the two stainless steel sheets to form a cavity channel to enhance the connection strength of the two stainless steel sheets, while ensuring that the cavity thickness remains constant, and at the same time, the heat medium circulates multiple times inside, and has multiple heat transfer processes with the crude oil to improve the heat exchange effect. The setting of the bulge (convex and concave structure) increases the contact area with the crude oil, thereby improving the heat exchange efficiency and effect. The temperature of the crude oil is reduced by absorbing the heat in the crude oil through cooling water, and the temperature of the cooling water is increased. In this way, the heat of the crude oil can be utilized, and the slag in the crude oil can be easily settled and fished out after the temperature is reduced.

[0018] Multiple plate heat exchangers can be connected in parallel between the cooling water inlet pipe and the cooling water outlet pipe, and the cooling water inlet pipe and the cooling water outlet pipe are respectively connected to the diagonal of the plate heat exchanger, so that the water flow inside the plate heat exchanger has no dead angle, and the heat exchange efficiency is improved. The plate heat exchanger, the cooling water inlet pipe and the cooling water outlet pipe can also be connected in series in sequence (that is, the cold water flows to the cooling water inlet pipe, multiple plate heat exchangers and the cooling water outlet pipe in sequence).

[0019] The manhole cover is used to inspect the inside of the box. The observation mirror is used to observe the operation inside the box.

[0020] In summary, the utility model has a scientific principle, makes full use of the heat energy of the crude oil after pressing, greatly improves the slag removal effect, makes the oil clearer after clarification, reduces the stress on the chain, and prolongs the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 yes Figure 1 A top view of

[0023] Figure 3 yes Figure 1 Left view of

[0024] Figure 4 It is a vertical cross-sectional diagram of a plate heat exchanger. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 4As shown, an oil tank with a plate heat exchanger of the utility model comprises a tank body 1, a power drive device, a slag scooping transmission mechanism and a screen plate 2. The power drive device is connected to the slag scooping transmission mechanism by chain transmission. The slag scooping transmission mechanism is arranged in a ring shape along the left side, bottom, right side and top of the inside of the tank body 1. The screen plate 2 is horizontally arranged at the upper part of the tank body 1 and below the top of the slag scooping transmission mechanism. An oil inlet 3 is arranged at the upper right part of the tank body 1, an oil outlet 4 whose height is lower than the oil inlet 3 is arranged at the upper left part of the tank body 1, and a plurality of plate heat exchangers 5 located between the oil inlet 3 and the oil outlet 4 are arranged at the lower part of the tank body 1. A plurality of plate heat exchangers 5 are arranged at intervals along the left-right direction or along the front-back direction, a plurality of plate heat exchangers 5 are connected to cooling water inlet pipes 6 at their lower parts, a plurality of plate heat exchangers 5 are connected to cooling water outlet pipes 7 at their upper parts, a slag discharge channel 8 with an open top is provided above the right side of the oil outlet 4 in the box body 1, the left end edge of the sieve plate 2 is located above the left side of the slag discharge channel 8, and the outlet of the slag discharge channel 8 extends backward out of the rear side of the box body 1.

[0026] The power drive device includes a fixed frame 9 fixed on the upper left side of the box body 1, on which a sliding frame 10 that can slide in the left and right horizontal directions is provided. The sliding frame 10 is fastened to the fixed frame 9 by bolts, and on which a motor reducer 11 is provided.

[0027] The slag scavenging transmission mechanism includes an upper left movable sprocket shaft 12, an upper right fixed sprocket shaft 13, a lower left fixed sprocket shaft 14 and a lower right fixed sprocket shaft 15 which are all arranged in the front-to-back direction. A tensioning adjustment mechanism for adjusting the left and right positions of the upper left movable sprocket shaft 12 is provided at the upper left corner of the casing 1. The upper left movable sprocket shaft 12, the upper right fixed sprocket shaft 13, the lower left fixed sprocket shaft 14 and the lower right fixed sprocket shaft 15 are respectively arranged at the upper left corner, the upper right corner, the lower left corner and the lower right corner of the casing 1. The front and rear sides of the upper left movable sprocket shaft 12, the upper right fixed sprocket shaft 13, the lower left fixed sprocket shaft 14 and the lower right fixed sprocket shaft 15 are connected by a chain 16 for transmission, and a plurality of L-shaped slag scavenging scrapers 17 are fixedly provided between the front and rear chains 16.

[0028] The tensioning adjustment mechanism includes an upper horizontal guide rail 18 and a lower horizontal guide rail 19 arranged along the left-right direction, an adjustment frame 20 is slidably arranged between the upper horizontal guide rail 18 and the lower horizontal guide rail 19, and a bearing seat 21 is provided on the adjustment frame 20 to be rotatably connected to the end of the upper left movable sprocket shaft 12. The left end of the adjustment frame 20 is connected to an adjustment screw 22 horizontally arranged along the left-right direction, and the left ends of the upper horizontal guide rail 18 and the lower horizontal guide rail 19 are provided with a fixing plate 23. The left end of the adjusting screw 22 passes through the fixing plate 23 and is bolted with an adjusting nut 24, and the adjusting nut 24 is crimped to the left side of the fixing plate 23 through a groove-type pad.

[0029] The cooling water inlet pipe 6 and the cooling water outlet pipe 7 are both arranged horizontally in the left-right direction. The cooling water inlet pipe 6 is arranged on the front side of the outside of the box body 1, and the cooling water outlet pipe 7 is arranged on the rear side of the outside of the box body 1. The lower front part of all the plate heat exchangers 5 is connected to the cooling water inlet pipe 6 through the lower connecting pipe 25 passing through the front side plate of the box body 1, and the upper rear part of all the plate heat exchangers 5 is connected to the cooling water outlet pipe 7 through the upper connecting pipe 26 passing through the rear side plate of the box body 1.

[0030] The plate heat exchanger 5 includes two stainless steel thin plates 27 arranged vertically and in parallel. The edges of the two adjacent stainless steel thin plates 27 are welded together by sealing strips 28. A plurality of supporting connecting blocks 29 are arranged between the two adjacent stainless steel thin plates 27 to form a cavity channel 30. Gas is injected and pressurized in the cavity channel 30 to form a plurality of bulges 31 on the outer surface of the stainless steel thin plates 27 to increase the heat exchange area.

[0031] A manhole cover 32 is provided at the lower part of the front side and / or rear side of the box body 1 , and an observation mirror 33 is provided at the front side and / or rear side of the box body 1 .

[0032] The working principle and process of the utility model are as follows: the crude oil of the edible oil raw material after being squeezed flows into the box body 1 from the oil inlet 3, the slag in the crude oil settles freely, the motor reducer 11 is started, the motor reducer 11 drives the upper left movable sprocket shaft 12 to rotate, the upper movable sprocket shaft drives the two chains 16 to rotate, the upper right fixed sprocket shaft 13, the lower left fixed sprocket shaft 14 and the lower right fixed sprocket shaft 15 are all driven to rotate synchronously, and the several L-shaped slag scrapers 17 between the two chains 16 move to the bottom of the box body 1 to remove the deposited slag The slag is scraped up and moves upward from the left side of the box body 1 until the slag is carried upward and falls on the screen plate 2. The slag scraper 17 scrapes the slag to the left along the screen plate 2, and the oil carried on the slag drips onto the crude oil surface in the box body 1 through the sieve holes on the sieve plate 2. When the slag moves to the left above the slag discharge channel 8, it automatically falls downward into the slag discharge channel 8. A slag extrusion auger can be set in the slag discharge channel 8, and the slag extrusion auger squeezes the oil contained in the slag and discharges it from the outside of the box body 1. The crude oil that becomes clear and free of slag after oil clarification is discharged from the oil outlet 4 on the left. The slag scraper 17 rotates continuously to pick up the slag from the bottom of the crude oil. At the same time, cold water enters the plate heat exchanger 5 through the cooling water inlet pipe 6. The crude oil exchanges heat with the cold water through the plate heat exchanger 5. After the heat exchange, the water temperature of the cold water increases and is discharged from the cooling water outlet pipe 7. The temperature of the crude oil decreases, and the slag suspended in the crude oil is more likely to settle. At the same time, the crude oil is blocked by the plate heat exchanger 5, and the flow speed of the crude oil from right to left in the box 1 is slowed down. When passing through the plate heat exchanger 5, the slag must first settle to the lower part, so that the slag scraper 17 has a better slag removal effect.

[0033] The utility model scoops up the slag material and first passes through the natural oil filtration of the screen plate 2, then collects it into the slag discharge channel 8, and then discharges and collects it after the oil is squeezed by the slag squeezing auger. The chain 16 is no longer subjected to the squeezing force, which reduces the force on the chain 16 and reduces the load of the motor reducer 11.

[0034] The utility model is provided with a tension adjustment device, and the position of the upper left movable sprocket shaft 12 is adjusted by screwing the adjustment nut 24 so that the adjustment screw 22 pulls the adjustment frame 20 to move left and right along the upper horizontal guide rail 18 and the lower horizontal guide rail 19, that is, the tension of the chain 16 is adjusted. After adjusting and positioning the position of the upper left movable sprocket shaft 12, the position of the motor reducer 11 needs to be adjusted, and the tension of the chain 16 between the motor reducer 11 and the upper left movable sprocket shaft 12 is adjusted by adjusting and fixing the position of the sliding frame 10 on the fixed frame 9.

[0035] The plate heat exchanger 5 is preferably arranged in the front-to-back direction, which plays a role in slowing down the rapid flow of crude oil from right to left. The plate heat exchanger 5 is welded with two stainless steel sheets 27, and a sealing strip 28 is welded between the edges of the two stainless steel sheets 27 to form a closed cavity. A supporting connection block 29 is arranged between the two stainless steel sheets 27 to form a cavity channel 30 to enhance the connection strength of the two stainless steel sheets 27, while ensuring that the cavity thickness remains constant, and at the same time, the heat medium circulates multiple times inside and has multiple heat transfer processes with the crude oil to improve the heat exchange effect. The setting of the bulge 31 (convex-concave structure) increases the contact area with the crude oil, thereby improving the heat exchange efficiency and effect. The temperature of the crude oil is reduced by absorbing the heat in the crude oil through cooling water, and the temperature of the cooling water is increased. In this way, the heat of the crude oil can be utilized, and the slag in the crude oil can be easily settled and fished out after the temperature is reduced.

[0036] Multiple plate heat exchangers 5 can be connected in parallel between the cooling water inlet pipe 6 and the cooling water outlet pipe 7. The cooling water inlet pipe 6 and the cooling water outlet pipe 7 are respectively connected to the diagonals of the plate heat exchanger 5. This can ensure that the water flow inside the plate heat exchanger 5 has no dead angle, thereby improving the heat exchange efficiency.

[0037] This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the protection scope of the technical solution of the utility model.

Claims

1. An oil clarifier tank with a plate heat exchanger, comprising a tank body, a power drive device, a slag scavenging transmission mechanism and a screen plate, wherein the power drive device is connected to the slag scavenging transmission mechanism by chain transmission, the slag scavenging transmission mechanism is arranged in a ring shape along the left side, bottom, right side and top of the tank body, the screen plate is horizontally arranged in the upper part of the tank body and below the top of the slag scavenging transmission mechanism, and is characterized in that: An oil inlet is provided on the upper right side of the box body, an oil outlet whose height is lower than the oil inlet is provided on the upper left side of the box body, a plurality of plate heat exchangers located between the oil inlet and the oil outlet are provided on the lower part of the box body, the plurality of plate heat exchangers are arranged at intervals in the left-right direction or in the front-back direction, a plurality of plate heat exchangers are connected to cooling water inlet pipes at the lower parts, a plurality of plate heat exchangers are connected to cooling water outlet pipes at the upper parts, a slag discharge channel with an open top is provided in the box body above the right side of the oil outlet, the left end edge of the sieve plate is located above the left side of the slag discharge channel, and the outlet of the slag discharge channel extends backward out of the rear side of the box body.

2. The oil clarifier tank with a plate heat exchanger according to claim 1, characterized in that: The power drive device includes a fixed frame fixed on the upper left side of the box body, a sliding frame which can slide in the left and right horizontal directions is arranged on the fixed frame, the sliding frame is fastened to the fixed frame by bolts, and a motor reducer is arranged on the sliding frame.

3. The oil clarifier tank with a plate heat exchanger according to claim 2, characterized in that: The slag scooping transmission mechanism comprises an upper left movable sprocket shaft, an upper right fixed sprocket shaft, a lower left fixed sprocket shaft and a lower right fixed sprocket shaft, all of which are arranged in the front-to-back direction; a tensioning adjustment mechanism for adjusting the left-to-right position of the upper left movable sprocket shaft is provided at the upper left corner of the casing; the upper left movable sprocket shaft, the upper right fixed sprocket shaft, the lower left fixed sprocket shaft and the lower right fixed sprocket shaft are respectively arranged at the upper left corner, the upper right corner, the lower left corner and the lower right corner of the casing; the front and rear sides of the upper left movable sprocket shaft, the upper right fixed sprocket shaft, the lower left fixed sprocket shaft and the lower right fixed sprocket shaft are connected by a chain transmission; a number of L-shaped slag scooping scrapers are fixedly provided between the front and rear chains.

4. The oil clarifier tank with a plate heat exchanger according to claim 3, characterized in that: The tensioning adjustment mechanism includes an upper horizontal guide rail and a lower horizontal guide rail arranged along the left and right directions, an adjustment frame is slidably arranged between the upper horizontal guide rail and the lower horizontal guide rail, the adjustment frame is provided with a bearing seat rotatably connected to the end of the upper left movable sprocket shaft, the left end of the adjustment frame is connected to an adjustment screw horizontally arranged along the left and right directions, the left ends of the upper horizontal guide rail and the lower horizontal guide rail are provided with a fixing plate, the left end of the adjusting screw passes through the fixing plate and is bolted with an adjusting nut, and the adjusting nut is crimped to the left side of the fixing plate through a grooved pad.

5. The oil clarifier tank with a plate heat exchanger according to any one of claims 1 to 4, characterized in that: The cooling water inlet pipe and the cooling water outlet pipe are both arranged horizontally in the left and right directions. The cooling water inlet pipe is arranged on the front side outside the box body, and the cooling water outlet pipe is arranged on the rear side outside the box body. The lower front part of all plate heat exchangers is connected to the cooling water inlet pipe through the lower connecting pipe passing through the front side plate of the box body, and the upper rear part of all plate heat exchangers is connected to the cooling water outlet pipe through the upper connecting pipe passing through the rear side plate of the box body.

6. The oil clarifier tank with a plate heat exchanger according to claim 5, characterized in that: On the lower front side of the plate heat exchanger, the plate heat exchanger includes two stainless steel thin plates arranged vertically and in parallel. The edges of the two adjacent stainless steel thin plates are welded together through sealing strips. Several supporting connecting blocks are arranged between the two adjacent stainless steel thin plates to form a cavity channel. Gas is injected and pressurized in the cavity channel to form several bulges on the outer surface of the stainless steel thin plates to increase the heat exchange area.

7. An oil clarifier tank with a plate heat exchanger according to any one of claims 1 to 4, characterized in that: A manhole cover is provided at the lower part of the front side and / or rear side of the box body, and an observation mirror is provided at the front side and / or rear side of the box body.

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