Double-coil heat exchange device

Abstract

The utility model discloses a double-coil heat exchange device, which solves the technical problems that the existing solid-liquid separation equipment is poor in temperature control effect, high in semi-finished product raw material residue, high in moisture content and low in overall filter pressing efficiency. The device comprises a mother liquor tank connected between a reaction kettle and a filter press, a mother liquor outlet of the reaction kettle is connected with the mother liquor tank through a mother liquor pipeline, a soft water coil and a compressed air coil are arranged in the mother liquor tank, and the two ends of the soft water coil penetrate out of the mother liquor tank through a water inlet pipe and a water outlet pipe. The two ends of the compressed air coil pipe penetrate out of the mother liquor tank through the air inlet pipe and the air outlet pipe, the water outlet pipe and the air outlet pipe are connected with the filter press, compressed air and soft water are heated by mother liquor and then enter the filter press to conduct washing and filter pressing on semi-finished products, the semi-finished products are prevented from adhering to filter cloth of the filter press, raw material residues are reduced, and the washing efficiency is improved. The moisture of the semi-finished product is reduced by more than 5%, the subsequent drying efficiency is improved, a large amount of drying heat energy is saved, and meanwhile, the mother liquor waste heat is fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of rubber accelerator production devices, in particular to a double-coil heat exchange device. Background Art

[0002] When producing rubber accelerator, the raw materials are first added into the reactor for reaction synthesis, and then the filter press is used for solid-liquid separation to obtain the semi-finished rubber accelerator and mother liquor. At this time, there are more raw material components in the semi-finished product, so the semi-finished product filtered out needs to be washed twice, filtered and dried and crushed to finally obtain the finished product of the rubber accelerator. In the prior art, when the filter press performs the second and third solid-liquid separation, the semi-finished powder obtained after the first filtration is fine, and the semi-finished powder is very sticky after washing with cold water, which easily causes the filter cloth of the filter press to be blocked. Replacing the filter cloth increases the production time and reduces the filtration efficiency. In addition, the semi-finished powder sticks to the filter cloth, so that the raw material components in the powder are not thoroughly cleaned, resulting in high raw material residues and reduced product quality. Finally, the moisture content of the powder after the three filtration separations is still high, which increases the subsequent drying time, wastes drying steam, and reduces the drying efficiency.

[0003] Therefore, the Chinese utility model patent with the authorization announcement date of 2019.08.09 and the authorization announcement number CN 209222083 U discloses a solid-liquid separation equipment and a production system including the same, including a sealed kettle, a motor, a scraper, a filter press plate and a compressor. The scraper is used to stir the material in the sealed kettle under the drive of the motor. The filter press plate is located under the scraper and in the sealed kettle, and is used to filter and separate the material in the sealed kettle. A heating coil is arranged on the filter press plate, and a thermometer is arranged on the sealed kettle. The compressor is connected to the sealed kettle through an air duct to provide compressed gas to the sealed kettle during the solid-liquid separation process.

[0004] The above-mentioned solid-liquid separation equipment can achieve temperature control for solid-liquid separation by arranging a heating coil on the filter plate of the filter press and a thermometer on the sealed kettle. However, the heating coil directly heats the powder, which easily causes uneven heating of the powder. Local excessive temperature will cause material decomposition, and the low temperature area cannot improve the filtration effect. Providing compressed gas to the sealed kettle through a compressor and an air duct can improve the filtration effect to a certain extent, but the moisture content of the semi-finished product of the filtration is still high, and multiple filtrations are required, and the overall filtration efficiency is low. Utility Model Content

[0005] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a double-coil heat exchange device, which solves the technical problems of poor temperature control effect of existing solid-liquid separation equipment, high residual semi-finished raw materials, high moisture content, and low filter pressing efficiency.

[0006] The technical solution of this application is:

[0007] A double-coil heat exchange device comprises a mother liquid tank connected between a rubber accelerator reactor and a filter press, wherein the mother liquid outlet of the reactor is connected to the mother liquid tank through a mother liquid pipeline, a soft water coil and a compressed air coil are arranged in the mother liquid tank, two ends of the soft water coil respectively pass through the mother liquid tank through a water inlet pipe and a water outlet pipe, two ends of the compressed air coil respectively pass through the mother liquid tank through an air inlet pipe and an air outlet pipe, and the water outlet pipe and the air outlet pipe are connected to the filter press.

[0008] Specifically, after the reaction synthesis is completed in the reactor, the mother liquor discharged from the reactor is introduced into the mother liquor tank, and soft water and compressed air are added to the soft water coil and the compressed air coil from the water inlet pipe and the air inlet pipe respectively. Since the temperature of the mother liquor is relatively high and the temperature of the soft water and the compressed air is relatively low, the mother liquor exchanges heat with the soft water and the compressed air in the double coils, and the soft water and the compressed air absorb heat to become warm water and hot air. The warm water and the hot air are then discharged from the water outlet pipe and the air outlet pipe and enter the lower part and the upper part of the filter press respectively, and the semi-finished product after the first filtration is washed and filtered twice and three times.

[0009] Preferably, the water inlet pipe is connected to the bottom of the mother liquid tank, and the water outlet pipe is connected to the top of the mother liquid tank. Soft water is continuously added from the water inlet pipe, and the soft water flows from bottom to top, which can increase the heat exchange time between the soft water and the mother liquid in the coil and make full use of the heat of the mother liquid.

[0010] Preferably, a flow valve is provided between the water inlet pipe and the outer wall of the mother liquid tank, a water pump is connected to the end of the water inlet pipe away from the mother liquid tank, and a valve is provided between the water outlet pipe and the outer wall of the mother liquid tank. The flow valve can control the flow rate of the soft water, and then control the temperature of the soft water after heating, and the valve can control the outflow of the soft water.

[0011] Preferably, valves are provided between the air inlet pipe and the outer wall of the mother liquid tank, and between the air outlet pipe and the outer wall of the mother liquid tank. The valves on the air inlet pipe and the air outlet pipe control the inflow and outflow of compressed air respectively.

[0012] Preferably, the mother liquid pipeline includes a liquid inlet pipe connected to the top of the mother liquid tank, a liquid outlet pipe connected to the bottom of the mother liquid tank, an overflow pipe connected to the middle of the mother liquid tank, and the overflow pipe is connected to the liquid outlet pipe. The mother liquid in the reactor enters the mother liquid tank through the mother liquid outlet and the liquid inlet pipe of the reactor, and flows out of the mother liquid tank through the liquid outlet pipe after the heat exchange is completed. The overflow pipe can control the height of the mother liquid addition, and it is not necessary to fill the entire mother liquid tank. The mother liquid only needs to be fully in contact with the double coil.

[0013] Preferably, valves are provided between the liquid inlet pipe and the outer wall of the mother liquid tank, between the overflow pipe and the outer wall of the mother liquid tank, and between the liquid outlet pipe and the outer wall of the mother liquid tank. The valve on the liquid inlet pipe can control the inflow of mother liquid, and the valves on the overflow pipe and the liquid outlet pipe can control the outflow of mother liquid.

[0014] Preferably, the liquid outlet pipe is connected to a wastewater pipe, so that the mother liquid after heat exchange in the mother liquid tank flows into the wastewater pipe for subsequent wastewater treatment.

[0015] Preferably, a liquid level gauge is connected to the outer wall of the mother liquid tank, the liquid level gauge is spaced apart from the overflow pipe, and valves are provided between both ends of the liquid level gauge and the outer wall of the mother liquid tank. The liquid level gauge can observe the liquid level of the mother liquid added to the mother liquid tank, thereby judging whether the mother liquid is in full contact with the coil.

[0016] Preferably, the height of the liquid level meter is less than the height of the overflow pipe. The height of the overflow pipe is the maximum height of the mother liquid, and the measured height of the liquid level meter is the real-time height of the mother liquid.

[0017] Preferably, a connecting flange is provided on the top of the mother liquid tank, which facilitates the replacement or removal of each connecting pipe.

[0018] Compared with the prior art, the technical solution disclosed in the utility model has the following beneficial effects:

[0019] 1. Soft water passes through the heat exchange device and uses the waste heat of the mother liquor to heat up to 40~60℃ warm water, and then enters the filter press to wash the semi-finished powder, so as to prevent the powder from sticking to the filter cloth of the filter press, save the time of replacing the filter cloth, speed up the filtration speed, reduce the residual raw materials in the product, and improve the water washing efficiency;

[0020] 2. The compressed air is heated by the waste heat of the mother liquid before entering the filter press, which reduces the moisture content of the semi-finished product filtered out by the filter press by more than 5%, which not only improves the subsequent drying efficiency but also saves a lot of heat energy required for drying;

[0021] 3. The heat exchange device heats the soft water and compressed air through the waste heat of the mother liquor, so that the waste heat of the mother liquor can be fully utilized and energy can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Description of Figure Numbers:

[0025] 1 mother liquid tank, 2 mother liquid pipeline, 201 liquid inlet pipe, 202 overflow pipe, 203 liquid outlet pipe, 3 soft water coil, 301 water inlet pipe, 302 water outlet pipe, 4 compressed air coil, 401 air inlet pipe, 402 air outlet pipe, 5 liquid level meter, 6 flow valve, 7 valve body, 8 flange. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the core concept of the utility model and the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1, a double coil heat exchange device, such as Figure 1 As shown, it includes a mother liquid tank 1 connected between a rubber accelerator reactor and a filter press, the mother liquid outlet of the reactor is connected to the mother liquid tank 1 through a mother liquid pipeline 2, a soft water coil 3 and a compressed air coil 4 are arranged in the mother liquid tank 1, both ends of the soft water coil 3 pass through the mother liquid tank 1 through a water inlet pipe 301 and a water outlet pipe 302 respectively, and both ends of the compressed air coil 4 pass through the mother liquid tank 1 through an air inlet pipe 401 and an air outlet pipe 402 respectively, and the water outlet pipe 302 and the air outlet pipe 402 are connected to the filter press.

[0028] Specifically, after the reaction synthesis is completed in the reactor, the mother liquor discharged from the reactor is introduced into the mother liquor tank 1, and soft water and compressed air are added to the soft water coil 3 and the compressed air coil 4 from the water inlet pipe 301 and the air inlet pipe 401 respectively. Since the temperature of the mother liquor is relatively high and the temperature of the soft water and the compressed air is relatively low, the mother liquor exchanges heat with the soft water and the compressed air in the soft water coil 3 and the compressed air coil 4, and the soft water and the compressed air absorb heat to become warm water and hot air. The warm water and the hot air are then discharged from the water outlet pipe 302 and the air outlet pipe 402, and enter the lower part and the upper part of the filter press respectively, and the semi-finished product after the first filtration is washed, filtered twice and filtered three times.

[0029] The soft water coil 3 and the compressed air coil 4 do not interfere with each other. Preferably, the length of the soft water coil 3 is greater than that of the compressed air coil 4. Both the soft water coil 3 and the compressed air coil 4 are spiral pipes.

[0030] Among them, the temperature of the mother liquor discharged from the reactor is generally not less than 80 degrees Celsius. The soft water passes through the heat exchange device and is converted into 40-60°C warm water using the waste heat of the mother liquor, and then enters the filter press for washing, which reduces the residual raw materials of the product and improves the water washing efficiency. Then, the hot compressed air obtained by heating the waste heat of the mother liquor is filtered out. Compared with ordinary compressed air filtration, the moisture content of the semi-finished product is reduced by more than 5%, which not only improves the drying efficiency of the subsequent drying equipment, but also saves a lot of heat energy, and the waste heat of the mother liquor is fully utilized.

[0031] Embodiment 2, based on embodiment 1, is a double coil heat exchange device, wherein the water inlet pipe 301 is connected to the bottom of the mother liquid tank 1, and the water outlet pipe 302 is connected to the top of the mother liquid tank 1. Soft water is continuously added from the water inlet pipe 301, and the soft water flows from bottom to top until it flows out from the water outlet pipe 302 at the top, which can increase the heat exchange time between the soft water in the soft water coil 3 and the mother liquid in the mother liquid tank 1, and fully utilize the heat of the mother liquid.

[0032] Embodiment 3, based on embodiment 1, a double coil heat exchange device, a flow valve 6 is provided between the water inlet pipe 301 and the outer wall of the mother liquid tank 1, a water pump is connected to the end of the water inlet pipe 301 away from the mother liquid tank 1, and a valve 7 is provided between the water outlet pipe 302 and the outer wall of the mother liquid tank 1. The flow valve 6 can control the flow rate of soft water, and then control the temperature of the soft water after heating, and the valve 7 can control the outflow of soft water.

[0033] Among them, the source of soft water is the factory's tap water obtained through reverse osmosis filtration. The soft water obtained after reverse osmosis filtration first enters the water reservoir. When soft water needs to be added to the mother liquid tank 1, the flow valve 6 is opened, and a specified amount of soft water is added to the mother liquid tank 1 through the water pump and the water inlet pipe 301. The soft water and the mother liquid exchange heat. After the heat exchange is completed, the valve 1 is opened to discharge the heated warm water from the outlet pipe 302.

[0034] Embodiment 4, based on embodiment 1, a double coil heat exchange device, valves 7 are provided between the air inlet pipe 401 and the outer wall of the mother liquid tank 1, and between the air outlet pipe 402 and the outer wall of the mother liquid tank 1. The valves on the air inlet pipe 401 and the air outlet pipe 402 respectively control the inflow and outflow of compressed air.

[0035] Embodiment 5, based on embodiment 1, a double coil heat exchange device, wherein the mother liquid pipeline 2 comprises a liquid inlet pipe 201 connected to the top of the mother liquid tank 1, a liquid outlet pipe 203 connected to the bottom of the mother liquid tank 1, an overflow pipe 202 connected to the middle of the mother liquid tank 1, and the overflow pipe 202 is connected to the liquid outlet pipe 203. The mother liquid in the reactor enters the mother liquid tank 1 through the mother liquid outlet of the reactor and the liquid inlet pipe 201, and flows out of the mother liquid tank 1 through the liquid outlet pipe 203 after the heat exchange is completed. The height of the overflow pipe 202 is located between the liquid inlet pipe 201 and the liquid outlet pipe 203, and the height of the overflow pipe 202 is preferably higher than the highest point of the soft water coil 3 and the compressed air coil 4, and the height of the overflow pipe 202 is at least higher than the lowest point of the soft water coil 3 and the compressed air coil 4. The overflow pipe 202 can control the height of the mother liquid addition, and it is not necessary to fill the entire mother liquid tank 1. The mother liquid only needs to be in full contact with the soft water coil 3 and the compressed air coil 4. The overflow pipe 202 is connected to the liquid outlet pipe 203. When too much mother liquid is added, the mother liquid can overflow through the overflow pipe 202 and then flow into the liquid outlet pipe 203 for discharge.

[0036] Embodiment 6, based on Embodiment 5, a double coil heat exchange device, valves 7 are provided between the liquid inlet pipe 201 and the outer wall of the mother liquid tank 1, between the overflow pipe 202 and the outer wall of the mother liquid tank 1, and between the liquid outlet pipe 203 and the outer wall of the mother liquid tank 1. The valve 7 on the liquid inlet pipe 201 can control the inflow of mother liquid, and the valves 7 on the overflow pipe 202 and the liquid outlet pipe 203 can control the outflow of mother liquid. When the mother liquid in the mother liquid tank 1 is added to the height where the overflow pipe 202 is located, the mother liquid overflows through the overflow pipe 202 and is discharged through the liquid outlet pipe 203. When the heat exchange is completed, the mother liquid flows out from the liquid outlet pipe 203.

[0037] Embodiment 7, based on Embodiment 5 or 6, a double coil heat exchange device, wherein the liquid outlet pipe 203 is connected to a waste water pipe. The mother liquid after heat exchange in the mother liquid tank 1 flows into the waste water pipe for subsequent waste water treatment.

[0038] Embodiment 8, based on Embodiment 5 or 6, a double coil heat exchange device, wherein a liquid level gauge 5 is connected to the outer wall of the mother liquid tank 1, the liquid level gauge 5 is spaced apart from the overflow pipe 202, and valves 7 are arranged between both ends of the liquid level gauge 5 and the outer wall of the mother liquid tank 1. The liquid level gauge 5 can observe the liquid level of the mother liquid added to the mother liquid tank 1, so as to judge whether the mother liquid is in full contact with the soft water coil 3 and the compressed air coil 4. If not, the valve 7 on the liquid inlet pipe 201 is kept open. After reaching the specified liquid level, it is judged that the mother liquid is in full contact with the soft water coil 3 and the compressed air coil 4, and the valve 7 on the liquid inlet pipe 201 is closed.

[0039] Embodiment 9, based on embodiment 8, is a double coil heat exchange device, wherein the height of the liquid level gauge 5 is less than the height of the overflow pipe 202. The height of the overflow pipe 202 is the maximum height of the mother liquid, and the measured height of the liquid level gauge 5 is the real-time height of the mother liquid.

[0040] Embodiment 10, based on embodiment 1, a double coil heat exchange device, the top of the mother liquid tank 1 is provided with a connecting flange 8. The connecting flange 8 facilitates the replacement or removal of each connecting pipe. The upper ends of the liquid inlet pipe 201, the overflow pipe 202, and the liquid level meter 5 can be connected to any connecting flange 8 on the top of the mother liquid tank 1, as long as the height of the liquid level meter 5 is less than the height of the overflow pipe 202.

[0041] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0042] The above content shows and describes the basic principle, main features and beneficial effects of the utility model. The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double coil heat exchange device, characterized in that: The invention comprises a mother liquid tank (1) connected between a rubber accelerator reactor and a filter press, wherein the mother liquid outlet of the reactor is connected to the mother liquid tank (1) via a mother liquid pipeline (2), a soft water coil (3) and a compressed air coil (4) are arranged in the mother liquid tank (1), two ends of the soft water coil (3) pass through the mother liquid tank (1) via a water inlet pipe (301) and a water outlet pipe (302), respectively, and two ends of the compressed air coil (4) pass through the mother liquid tank (1) via an air inlet pipe (401) and an air outlet pipe (402), respectively, and the water outlet pipe (302) and the air outlet pipe (402) are connected to the filter press.

2. The double-coil heat exchange device according to claim 1, characterized in that: The water inlet pipe (301) is connected to the bottom of the mother liquid tank (1), and the water outlet pipe (302) is connected to the top of the mother liquid tank (1).

3. The double coil heat exchange device according to claim 1, characterized in that: A flow valve (6) is provided between the water inlet pipe (301) and the outer wall of the mother liquid tank (1), one end of the water inlet pipe (301) facing away from the mother liquid tank (1) is connected to a water pump, and a valve (7) is provided between the water outlet pipe (302) and the outer wall of the mother liquid tank (1).

4. The double-coil heat exchange device according to claim 1, characterized in that: Valves (7) are provided between the air inlet pipe (401) and the outer wall of the mother liquid tank (1), and between the air outlet pipe (402) and the outer wall of the mother liquid tank (1).

5. The double coil heat exchange device according to claim 1, characterized in that: The mother liquid pipeline (2) comprises a liquid inlet pipe (201) connected to the top of the mother liquid tank (1), a liquid outlet pipe (203) connected to the bottom of the mother liquid tank (1), an overflow pipe (202) connected to the middle of the mother liquid tank (1), and the overflow pipe (202) is in communication with the liquid outlet pipe (203).

6. The double-coil heat exchange device according to claim 5, characterized in that: Valves (7) are provided between the liquid inlet pipe (201) and the outer wall of the mother liquid tank (1), between the overflow pipe (202) and the outer wall of the mother liquid tank (1), and between the liquid outlet pipe (203) and the outer wall of the mother liquid tank (1).

7. The double-coil heat exchange device according to claim 5 or 6, characterized in that: The liquid outlet pipe (203) is connected to a waste water pipe.

8. The double-coil heat exchange device according to claim 5 or 6, characterized in that: A liquid level gauge (5) is connected to the outer wall of the mother liquid tank (1), the liquid level gauge (5) and the overflow pipe (202) are arranged at a distance, and valves (7) are arranged between both ends of the liquid level gauge (5) and the outer wall of the mother liquid tank (1).

9. The double-coil heat exchange device according to claim 8, characterized in that: The height of the liquid level meter (5) is smaller than the height of the overflow pipe (202).

10. The double-coil heat exchange device according to claim 1, characterized in that: A connecting flange (8) is provided on the top of the mother liquid tank (1).

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