Peculiar smell trapping water heat energy transformation device

Abstract

The utility model relates to the technical field of heat energy recovery, and discloses a heat energy transformation device for peculiar smell trapping water. The utility model aims to solve the problems that the utilization rate of residual heat energy in hot air of a DC cooling dryer in the prior art is low, energy waste is caused, stainless steel is selected, and safety problems, pipeline corrosion and equipment scaling are avoided. Hot air heat energy of the first layer of the DC cooling dryer exchanges heat with water, hot water subjected to heat exchange enters the conditioning tower plate tower type heat exchanger to heat raw material beans, heat energy is fully utilized, waste gas of the first layer of the cooling dryer is sequentially connected with the heat energy recycling mechanism and the spraying, cleaning and deodorizing mechanism in the exhaust direction, peculiar smell trapping water is formed, and the peculiar smell trapping water is discharged into the conditioning tower plate tower type heat exchanger. The peculiar smell trapping water is located in the trapping water temporary storage tank, the trapping water temporary storage tank is connected with the circulating water heat exchange mechanism, and the heat energy output end of the circulating water heat exchange mechanism is connected with the conditioning tower so as to heat soybeans in the conditioning tower. According to the utility model, residual heat energy in hot air at 72 DEG C is effectively utilized through heat energy recovery, so that the energy consumption is reduced, the energy utilization efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat energy recovery technical field especially relates to a peculiar smell trapping water heat energy reconstruction device. BACKGROUND

[0002] In the soybean processing process, the waste gas of the first layer of DC cooling dryer contains a large amount of heat energy. The original hot air is captured by water, and the peculiar smell trapping water (water temperature 58 degrees) is overflowed to the water seal tank. Not only a large amount of heat energy resources are wasted, but also the environment is polluted. In order to improve the energy utilization efficiency and reduce environmental pollution, many enterprises begin to explore the waste gas heat energy recycling technology. However, there are the following problems: low heat energy utilization rate, and easy to produce secondary pollution. The heat exchange equipment structure is complex, the maintenance cost is high, and it is not suitable for large-scale popularization and application. The energy consumption is high in the heat energy recovery process, and the economic benefit is poor.

[0003] The prior art Chinese patent document: 201210204308.9 discloses a water heat energy recovery device, which comprises a drain pipe connected with a sewer pipe and an inlet pipe connected with an inlet pipe. The inlet pipe is spirally arranged outside the drain pipe. The recovery device spirally arranges the inlet pipe outside the drain pipe, absorbs the energy of the sewage discharged from the drain pipe, preheats the inlet water, reduces the waste of sewage energy, and reasonably utilizes the resources.

[0004] But the above scheme in the implementation process, at least there is following technical problem: the residual heat energy utilization rate in hot air is low, causes energy waste, and at the same time lacks safety treatment facilities, easy to lead to corrosion pipeline and equipment scale, cleaning maintenance process is complex. Therefore, it is urgent to put forward a peculiar smell trapping water heat energy reconstruction device. SUMMARY

[0005] In view of the above technical problems, the present disclosure provides a peculiar smell trapping water heat energy reconstruction device, which solves the technical problems of low residual heat energy utilization rate in hot air in the prior art, energy waste, lack of safety treatment facilities, easy to lead to corrosion pipeline and equipment scale, and complex cleaning maintenance process.

[0006] According to one aspect of the present disclosure, a foul odor capturing water heat energy modification device is provided, which is installed between a DC cooling dryer and a conditioning tower plate heat exchanger. The first layer of exhaust gas of the DC cooling dryer is connected in sequence along the discharge direction to a heat energy recovery mechanism, a spray cleaning and deodorizing mechanism, forming foul odor capturing water. The foul odor capturing water is in a capturing water temporary storage tank. The circulating water heat exchange mechanism includes a condenser tube water circuit and a condenser shell water circuit. The condenser tube water circuit includes a foul odor capturing tank, a capturing water temporary storage tank, a capturing water pump and a condenser. The condenser shell water circuit includes a condenser, a pipe pump, a plate tower heat exchanger and a hot water pump. The plate tower heat exchanger output end is connected to a conditioning tower to heat soybeans in the conditioning tower. The condenser tube is flowed through with foul odor capturing water. The condenser shell is flowed through with circulating water to absorb the heat of the foul odor capturing water to heat the conditioning tower.

[0007] In some embodiments of the present disclosure, the flow rate of the circulating water in the shell is 30 m³ / h.

[0008] In some embodiments of the present disclosure, a filter screen is arranged at the pipe inlet, which is detachably installed at the pipe inlet.

[0009] In some embodiments of the present disclosure, the circulating water heat exchange mechanism includes a plate tower heat exchanger for heat exchange between hot water and soybeans. The plate tower heat exchanger has the same size as the conditioning tower, with a length of 3.3 m and a width of 3.3 m. The single-layer plate tower heat exchanger has a height of 1 m and an area of 400 m².

[0010] In some embodiments of the present disclosure, the plate tower heat exchanger has a height of 1 m and two plate towers arranged in the same direction from top to bottom. The heat exchange area is 800 m².

[0011] In some embodiments of the present disclosure, the plate tower heat exchanger is made of SS304 stainless steel sheets. The thickness of the sheet is 1.5 mm, and the pressure rating is 16 bar.

[0012] In some embodiments of the present disclosure, the plate tower heat exchanger further includes a soybean buffer protection mechanism. The soybean buffer protection mechanism includes a flexible medium, which is arranged at the top sheet inlet and welded to the sheet.

[0013] In some embodiments of the present disclosure, the condenser includes a tube heat exchanger, which is flowed through with foul odor capturing water and clean water to exchange heat energy from the foul odor capturing water to the clean water. The clean water output end of the tube heat exchanger is connected to the conditioning tower.

[0014] In some embodiments of the present disclosure, the tube heat exchanger is made of SS304 stainless steel. The thickness of the tube of the tube heat exchanger is 1.5 mm, and the pressure rating is 6 bar.

[0015] In some embodiments of the present disclosure, the column tube heat exchanger is arranged in one above the other in a horizontal manner.

[0016] The present application has the advantages that:

[0017] The odor capturing water contains a small amount of protein meal foam, and is not easy to block the pipe and is beneficial to cleaning and maintenance.

[0018] The thickness of the plate is 1.5mm, and the pressure resistance level is 16bar; the service life of the heat exchanger is improved, and the welding or soybean scouring wear and water leakage are avoided.

[0019] The two-layer plate tower heat exchanger plates are arranged in the same direction up and down to avoid the plate tower heat exchanger being blocked in the middle by large materials such as soybean rods, and the plate direction and the first layer of column tube direction are staggered, which is beneficial to uniform heating of soybeans.

[0020] The soybean buffer and protection device is arranged to avoid the plate being scoured and worn by soybeans and water leakage.

[0021] The column tube heat exchanger is arranged in the middle, clean circulating water is used as a medium to absorb the heat of the capturing water, and then the tempered soybeans are heated; the capturing water containing solvent and meal impurities is prevented from directly entering the pretreatment workshop to cause safety problems and corrosion of pipelines and equipment scaling.

[0022] The SS304 full stainless steel column tube heat exchanger is selected to avoid blockage and facilitate cleaning and maintenance, and the 1.5mm thick column tube improves the service life of the heat exchanger.

[0023] The two heat exchangers are arranged in one above the other in a horizontal manner to reduce space occupation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is a structure schematic view of the odor capturing water heat energy reforming device.

[0025] Fig. 2 It is a schematic view of the condenser connection structure.

[0026] Fig. 3 It is a heat source flow schematic view.

[0027] In the figure, the component names are as follows: 1, first layer of tempering tower; 2, feed hopper; 3, condenser; 4, plate tower heat exchanger; 5, hot water pump; 6, pipeline pump; 7, odor capturing tank; 8, capturing water temporary storage tank; 9, capturing water pump. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. Example 1

[0029] The example discloses a peculiar smell capturing water heat energy transformation device, see Figs. 1 to 3 ; the waste gas of the first layer of the DC cooling dryer is sequentially connected with a heat energy recovery mechanism and a spray cleaning and deodorization mechanism in the discharging direction to form peculiar smell capturing water, the peculiar smell capturing water is in a capturing water temporary storage tank 8, the circulating water heat exchange mechanism comprises a condenser pipe water circuit and a condenser shell water circuit, the condenser pipe water circuit comprises a peculiar smell capturing tank 7, the capturing water temporary storage tank 8, a capturing water pump 9 and a condenser 3, the condenser shell water circuit comprises the condenser 3, a pipeline pump 6, a plate-tower heat exchanger 4 and a hot water pump 5, an output end of the plate-tower heat exchanger is connected with a conditioning tower to heat soybeans in the conditioning tower, the condenser 3 is provided with the peculiar smell capturing water in the pipe, and the condenser is provided with circulating water in the shell to absorb the heat of the peculiar smell capturing water and heat the conditioning tower.

[0030] In some embodiments of the present disclosure, the flow rate of the circulating water in the shell is 30 m³ / h.

[0031] In some embodiments of the present disclosure, a filter screen is arranged at the pipeline inlet, and the filter screen is detachably arranged at the pipeline inlet.

[0032] In some embodiments of the present disclosure, the circulating water heat exchange mechanism comprises a plate-tower heat exchanger 8 for heat exchange between hot water and soybeans, the plate-tower heat exchanger has the same size as the conditioning tower, and the length and width are both 3.3 m; the single-layer plate-tower heat exchanger has a height of 1 m and an area of 400 m².

[0033] The plate-tower heat exchanger 4 has a height of 1 m and is arranged in the same direction from top to bottom.

[0034] The plate-tower heat exchanger is made of SS304 stainless steel sheets, the thickness of the sheets is 1.5 mm, and the pressure resistance level is 16 bar.

[0035] The plate-tower heat exchanger further comprises a soybean buffer protection mechanism, the soybean buffer protection mechanism comprises a flexible medium, and the flexible medium is arranged at the top sheet feeding position and welded to the sheet.

[0036] The circulating water heat exchange mechanism comprises a tube-type heat exchanger, the tube-type heat exchanger is provided with the peculiar smell capturing water and clean water to exchange heat energy between the peculiar smell capturing water and the clean water, and the clean water output end of the tube-type heat exchanger is connected with a conditioning tower.

[0037] The tube-type heat exchanger is made of SS304 stainless steel, the thickness of the tube-type heat exchanger is 1.5 mm, and the pressure resistance level is 6 bar.

[0038] The tube-type heat exchanger is two sets of horizontal arrangement.

[0039] In the working process,

[0040] Implementation: The residual heat energy in the 72°C hot air after the first layer of waste gas from the DC cooling dryer is recovered through heat energy recovery and automatic spray cleaning and deodorization is recovered through circulating water heat exchange to heat the soybeans in the conditioning tower.

[0041] Implementation: 1. The original hot air is captured by water, and the odor capturing water (water temperature 58 degrees) is overflowed to the water seal tank.

[0042] 2. In order to utilize the heat in the 58-degree odor capturing water, two condensers (shell side circulating water heat absorption, tube side 58-degree water) are added to absorb the heat of the 58-degree odor capturing water. After the circulating water absorbs heat, it enters the newly added plate tower to heat the conditioning tower. Note: The odor capturing water goes through the tube side because it contains a small amount of protein meal foam, which is not easy to block and is easy to clean and maintain.

[0043] Equipment optimization scheme

[0044] Heat exchanger size and area Material balance and heat balance calculations. During the second process optimization, the 5-layer conditioning tower was changed to condensing water circulation heating. In order to ensure the conditioning effect, it is not appropriate to continue to change too many layers of the conditioning tower steam heating to circulating water heating. Therefore, a plate tower heat exchanger for hot water and soybean heat exchange needs to be added. Generally, the added part is installed directly between the original first layer of the conditioning tower and the feed hopper. The length and width dimensions are the same as the original conditioning tower, both 3.3m. The single-layer plate tower heat exchanger is designed to be 1m in size and 400 in area, with a much higher heat exchange efficiency than the original tubular conditioning heat exchanger. Considering that there is only 2 meters of remaining height available at the top of the original conditioning tower, two layers of 1m plate tower heat exchanger are selected, with a total heat exchange area of 800㎡.

[0045] Heat exchanger material and thickness To avoid corrosion, SS304 stainless steel sheets are selected. The sheet thickness is 1.2, 1.5mm, in order to improve the service life of the heat exchanger and avoid water leakage due to welding or soybean erosion, 1.5mm thick sheets are selected, with a design pressure rating of 16bar.

[0046] Heat exchanger arrangement Arranged between the first layer of the original conditioning tower and the feed hopper, the feed hopper is moved up 2 meters to create space.

[0047] In order to avoid the middle of the plate tower heat exchanger being blocked by large pieces of material such as bean rods, the newly added two layers of plate tower heat exchanger sheets are arranged in the same direction from top to bottom. At the same time, considering the uniform heating of soybeans, the sheet direction is staggered with the original first layer of tube direction.

[0048] In order to avoid the plate being eroded and damaged by soybeans, a soybean buffer and protection device is installed at the top of the plate and the plate welding.

[0049] The original tempering tower foundation consisted of I-beams at the bottom of the tower bolted to I-beam columns. According to the design institute's calculations, these bolts were insufficient to meet the load requirements of the two additional floors under full-load production. Therefore, the original foundation was reinforced and upgraded in accordance with design standards.

[0050] Optimization scheme for shell and tube heat exchangers

[0051] The shell-and-tube heat exchanger is the core equipment in this optimization step. The key aspects of its selection and design lie in the heat exchanger's safety, corrosion, scaling, and contamination; its size, area, and flow rate; its material, thickness, and pressure resistance; and its arrangement. Specific optimization schemes are shown in the table below:

[0052] Equipment optimization plan

[0053] Safety concerns, corrosion, scaling, and pollution are present in the circulating water collected after the first-stage waste gas heat recovery process at the DC plant. This circulating water contains solvents and impurities. To prevent the collected water from directly entering the pretreatment workshop, which could lead to safety issues, corrosion of pipes and equipment, and scaling, a shell-and-tube heat exchanger is installed in the middle. Clean circulating water is used as a medium to absorb the heat from the collected water and then heat the conditioned soybeans.

[0054] Material and heat balance calculations should be performed for the size, area, and flow rate of the heat exchanger. While ensuring heat exchange efficiency, investment should be appropriately controlled. A DC first-stage waste gas heat recovery and subsequent capture circulating water-circulating water heat exchanger with an area of ​​220㎡ should be selected. Based on the flow rate and heat capacity of the tube-side capture circulating water, the shell-side circulating water flow rate should be determined to be 30m³ / h.

[0055] To avoid corrosion from solvents and water, and to prevent clogging and facilitate cleaning and maintenance, an SS304 all-stainless steel shell-and-tube heat exchanger was selected, including the shell, tube sheet, baffles, tubes, and end caps. A 1.5 mm thick tube was chosen to extend the heat exchanger's service life. The pressure rating is 6 bar.

[0056] The layout of the heat exchanger system should prioritize proximity to the original heat exchange medium, reduce the length of inlet and outlet pipes, facilitate operation, cleaning and maintenance, and meet safety requirements.

[0057] On the east side of the second floor of the leaching workshop, near the DC (Discharge Center), the first-floor exhaust gas heat recovery heat exchanger is placed. To reduce space occupation, the two heat exchangers are arranged horizontally, one above the other.

[0058] Although some preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0059] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An odor capturing water heat energy retrofit device installed between a DC cooling dryer and a conditioning tray column heat exchanger, characterized in that: The waste gas of the first layer of the DC cooling dryer is connected in turn with a heat energy recovery mechanism, a spray cleaning and deodorizing mechanism in the discharge direction to form odor capturing water, which is in a capturing water temporary storage tank (8). The circulating water heat exchange mechanism comprises a condenser tube water circuit and a condenser shell water circuit. The condenser tube water circuit comprises an odor capturing tank (7), a capturing water temporary storage tank (8), a capturing water pump (9) and a condenser (3). The condenser shell water circuit comprises the condenser (3), a pipeline pump (6), a plate tower heat exchanger (4) and a hot water pump (5). The output end of the plate tower heat exchanger is connected with a conditioning tower to heat soybeans in the conditioning tower. The tube passage of the condenser (3) flows through odor capturing water, and the shell passage of the condenser flows through circulating water to heat the conditioning tower by absorbing the heat of the odor capturing water.

2. The foul gas trap hydrothermal energy retrofit device of claim 1, wherein: The flow rate of the circulating water in the shell passage is 30 m³ / h.

3. The foul gas trap hydrothermal energy retrofitting device according to claim 1, characterized in that: A filter screen is arranged at the pipeline inlet of the condenser (3), which is detachably installed at the pipeline inlet.

4. The foul gas trap hydrothermal energy retrofit device of claim 1, wherein: The circulating water heat exchange mechanism comprises a plate tower heat exchanger (4) for heat exchange between hot water and soybeans. The plate tower heat exchanger has the same size as the conditioning tower, and the length and width are both 3.3 m. The single-layer plate tower heat exchanger has a height of 1 m and an area of 400 m².

5. The foul gas trap hydrothermal energy retrofit device of claim 4, wherein: The plate tower heat exchanger has a height of 1 m, and two plate tower heat exchangers are arranged in the same direction one above the other. The heat exchange area is 800 m².

6. The foul gas trap hydrothermal energy retrofit device of claim 4, wherein: The plate tower heat exchanger is made of SS304 stainless steel sheets, and the thickness of the sheets is 1.5 mm, and the pressure rating is 16 bar.

7. The foul gas trap hydrothermal energy retrofit device of claim 4, wherein: The plate tower heat exchanger further comprises a soybean buffer protection mechanism. The soybean buffer protection mechanism comprises a flexible medium, which is arranged at the top sheet inlet and welded to the sheet.

8. The foul gas trap hydrothermal energy retrofit device of claim 1, wherein: The condenser (3) is a tube heat exchanger, and the tube heat exchanger flows through odor capturing water and clean water to exchange heat from the odor capturing water to the clean water. The clean water output end of the tube heat exchanger is connected with a conditioning tower.

9. The foul gas trap hydrothermal energy retrofit device of claim 8, wherein: The tube heat exchanger is made of SS304 stainless steel, and the thickness of the tubes of the tube heat exchanger is 1.5 mm. The pressure rating is 6 bar. The tube heat exchanger is two units arranged one above the other in a horizontal manner.

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