Emptying steam recycling system for extraction tank

Abstract

The utility model relates to an extraction tank emptying steam recycling system, and belongs to the technical field of traditional Chinese medicine production. Comprising a gas washing tower with a gas outlet and a tubular heat exchanger, a plurality of spray pipe assemblies are fixedly mounted at the inner top of the gas washing tower, a liquid storage cavity is formed in the inner bottom of the gas washing tower, and a gas inlet communicated with an extraction tank emptying pipeline is formed in the middle of the gas washing tower; a hot fluid inlet of the tubular heat exchanger is communicated with a liquid outlet in the bottom of the gas washing tower through a circulating pipeline A, a hot fluid outlet of the tubular heat exchanger is connected with a spraying pipe assembly of the gas washing tower, and a circulating pump set used for pumping hot water in the liquid storage cavity into the tubular heat exchanger is installed on the circulating pipeline A. The utility model has the beneficial effects that the steam consumption during site cleaning can be saved, the risk of internal pressure generated in the extraction tank during decoction can be reduced, and the environmental pollution caused by secondary steam emission can be reduced.

Description

Technical Field

[0001] This utility model relates to a steam recovery and utilization system for extraction tank venting, belonging to the field of traditional Chinese medicine production technology. Background Technology

[0002] Extraction tanks are a common type of leaching and extraction equipment used in the pharmaceutical and chemical industries, particularly suitable for the extraction of components from plant products. Commonly used multi-functional extraction tanks, in addition to the main extraction tank equipment, often include devices such as foam eliminators, condensers, coolers, and oil-water separators.

[0003] Utility model patent number 202421031320.9 discloses an oil extraction system with a cleaning function, belonging to the field of product extraction technology related to food, pharmaceuticals, and chemicals. It includes an external circulation pipe connecting a second circulation pipe and a third circulation pipe. Valves B and C, controlling the on / off state of the pipeline, are respectively installed at both ends of the external circulation pipe. Valves A and D, controlling the on / off state of the corresponding pipelines, are respectively installed on the second circulation pipe and the third connecting pipe. One end of the external circulation pipe is connected to the second circulation pipe between valve A and the external circulation pump.

[0004] The current technology is not comprehensive and has the following drawbacks: Our extraction workshop has a total of multiple extraction tanks. During the boiling and maintaining the boiling process, all the secondary steam generated in the tanks is discharged outdoors. Each extraction tank discharges steam for about 10 hours a day, with a secondary steam discharge temperature of about 100-110℃ and a secondary steam discharge volume of about several tons per hour. The discharged secondary steam is not utilized, resulting in energy waste. In addition, the steam discharged from the extraction tanks after boiling does not meet environmental protection requirements.

[0005] To solve one of the above problems, there is an urgent need for a system for recovering and utilizing the steam from the extraction tank vent. Utility Model Content

[0006] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is: how to save steam usage during cleaning, reduce the risk of internal pressure generated in the extraction tank during boiling, and reduce environmental pollution caused by secondary steam discharge. To this end, an extraction tank venting steam recovery and utilization system is provided.

[0007] The extraction tank venting steam recovery and utilization system of this utility model includes an extraction tank venting pipe connected to the extraction tank body. Each extraction tank venting pipe is equipped with an electrically controlled valve A to control the on / off state of the pipe. The system is characterized by further including a gas scrubbing tower with an outlet and a shell-and-tube heat exchanger. Multiple spray pipe assemblies are fixedly installed at the top inner part of the gas scrubbing tower. The bottom inner part of the gas scrubbing tower is a liquid storage chamber. The middle part of the gas scrubbing tower has an air inlet communicating with the extraction tank venting pipe. The hot fluid inlet of the shell-and-tube heat exchanger is connected to the liquid outlet at the bottom of the gas scrubbing tower via a circulation pipe A. The hot fluid outlet of the shell-and-tube heat exchanger is connected to the spray pipe assembly of the gas scrubbing tower. A circulation pump set is installed on the circulation pipe A to pump hot water from the liquid storage chamber into the shell-and-tube heat exchanger.

[0008] The circulating water in the storage chamber of the gas scrubbing tower is pressurized by a circulating pump unit and flows through a shell-and-tube heat exchanger. It is then atomized and sprayed from the nozzles of the spray pipe assembly inside the gas scrubbing tower. The air inlet in the middle of the gas scrubbing tower introduces steam to be cooled. The atomized circulating liquid comes into full contact with the high-temperature steam, completing heat exchange. The air outlet at the top of the gas scrubbing tower discharges the treated clean air. The circulating heat from the heat exchange enters the shell-and-tube heat exchanger, which heats the tap water in its tubes, raising its temperature. The heated tap water can then be used for cleaning in the extraction workshop. This achieves the goals of saving steam consumption during cleaning, reducing the risk of internal pressure buildup in the extraction tank during boiling, and minimizing environmental pollution caused by secondary steam emissions.

[0009] Preferably, a filter is installed on the circulation pipeline A between the gas scrubbing tower and the circulation pump group.

[0010] Preferably, the filter is a Y-type filter, which can be used for filtering large particles in liquids, gases, or other media. Installed on pipelines, it removes larger solid impurities from fluids, ensuring the normal operation of machinery and equipment, including compressors, pumps, and instruments, thereby stabilizing the process and ensuring safe production. When fluid enters the filter cartridge containing a filter screen of a specific size, impurities are blocked, while clean filtrate is discharged from the filter outlet. When cleaning is required, simply remove the detachable filter cartridge, clean it, and reinstall it. Therefore, its use and maintenance are extremely convenient.

[0011] Preferably, the gas scrubbing tower has a demister at its inner top for separating liquid droplets entrained in the gas flow.

[0012] Preferably, the circulating pump set includes a first circulating pump connected in series on the circulating pipeline A, and a second circulating pump connected in parallel with the first circulating pump. The inlet of the second circulating pump is connected to the inlet of the first circulating pump via a pipeline, and the outlet of the second circulating pump is connected to the outlet of the first circulating pump via a pipeline. Electrically controlled valves B are installed on the pipelines connected to the inlets of both the first and second circulating pumps. The first and second circulating pumps can be started simultaneously or independently.

[0013] Preferably, the cold fluid inlet of the shell-and-tube heat exchanger is connected to a tap water pipe, and the cold fluid outlet of the shell-and-tube heat exchanger is connected to an external drain pipe, which is then connected to a hot water storage tank in the workshop.

[0014] The secondary steam discharged from the extraction tank's vent pipe enters a gas scrubbing tower. The circulating water in the scrubbing tower is pumped into a shell-and-tube heat exchanger. The circulating water and secondary steam exchange heat within the scrubbing tower, causing the circulating water temperature to rise continuously. Tap water flows through the tube side of the shell-and-tube heat exchanger, while circulating water flows through the shell side, heating the tap water in the tube side and raising its temperature. This heated water is then stored in the workshop's hot water storage tank and can be used for cleaning the extraction workshop. The vent steam from the extraction tank undergoes condensation and heat exchange within the scrubbing tower, effectively utilizing the secondary steam and reducing environmental pollution from the extraction tank's vent steam.

[0015] Preferably, a hot water supply pipe is connected after the drain outlet of the hot water storage tank in the workshop, and a water supply pump is installed on the hot water supply pipe.

[0016] Preferably, a first electrically controlled valve is installed at the connection between the circulation pipeline B and the shell-and-tube heat exchanger, a second electrically controlled valve is installed at the connection between the external drain pipe and the shell-and-tube heat exchanger, a third electrically controlled valve is installed at the connection between the tap water pipe and the shell-and-tube heat exchanger, and a fourth electrically controlled valve is installed at the connection between the circulation pipeline A and the shell-and-tube heat exchanger. The electrically controlled valves can be opened and closed as needed.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The extraction tank venting steam recovery and utilization system of this utility model uses a circulating pump set to pressurize the circulating water in the storage chamber of the gas scrubbing tower, which then flows through a shell-and-tube heat exchanger and is atomized and sprayed out from the nozzles of the spray pipe assembly inside the gas scrubbing tower. The air inlet in the middle of the gas scrubbing tower is used to introduce steam to be cooled. The circulating liquid sprayed out by the nozzles comes into full contact with the high-temperature steam to complete heat exchange, while the air outlet at the top of the gas scrubbing tower is used to discharge the treated clean air. The circulating heat that has completed heat exchange enters the shell-and-tube heat exchanger, which can heat the tap water in its tube side to raise the temperature. The heated tap water can be used as cleaning water in the extraction workshop.

[0019] The extraction tank venting steam recovery and utilization system described in this utility model can save steam usage during site cleaning, reduce the risk of internal pressure buildup in the extraction tank during boiling, and reduce environmental pollution caused by secondary steam discharge.

[0020] The extraction tank venting steam recovery and utilization system of this utility model, with its Y-type filter, can be used for filtering large particles in liquids, gases, or other media. When installed on pipelines, it can remove larger solid impurities from fluids, enabling machinery and equipment, including compressors, pumps, and instruments, to operate normally and achieve stable process flow and ensure safe production. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the shell-and-tube heat exchanger of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0025] In the diagram: 1. Extraction tank body; 2. Extraction tank venting pipe; 3. Gas scrubbing tower; 4. Circulation pump set; 5. Shell and tube heat exchanger; 6. Circulation pipeline A; 7. Circulation pipeline B; 8. Spray pipe assembly; 9. Filter; 10. Tap water pipe; 11. External drain pipe; 12. Workshop hot water storage tank; 13. Hot water supply pipe; 14. Water supply pump; 15. Demister; 16. Auxiliary circulation pipe; 17. Fifth electric control valve; 18. Auxiliary heating circulation pump. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings: The present invention will be further described below through specific embodiments, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0027] Example 1, such as Figure 1-2As shown, the extraction tank venting steam recovery and utilization system includes an extraction tank venting pipe 2 connected to the extraction tank body 1. Each extraction tank venting pipe 2 is equipped with an electrically controlled valve A to control the on / off state of the pipe. It also includes a gas scrubbing tower 3 with an outlet and a shell-and-tube heat exchanger 5. Multiple spray pipe assemblies 8 are fixedly installed on the inner top of the gas scrubbing tower 3. The inner bottom of the gas scrubbing tower 3 is a liquid storage chamber. The middle part of the gas scrubbing tower 3 has an air inlet that communicates with the extraction tank venting pipe 2. The hot fluid inlet of the shell-and-tube heat exchanger 5 is connected to the liquid outlet at the bottom of the gas scrubbing tower 3 through a circulation pipe A6. The hot fluid outlet of the shell-and-tube heat exchanger 5 is connected to the spray pipe assembly 8 of the gas scrubbing tower 3. A circulation pump group 4 is installed on the circulation pipe A6 to pump hot water from the liquid storage chamber into the shell-and-tube heat exchanger 5.

[0028] The circulating water in the storage chamber of the gas scrubbing tower 3 is pressurized by the circulating pump group 4 and flows through the shell-and-tube heat exchanger 5. It is then atomized and sprayed out from the nozzles of the spray pipe assembly 8 inside the gas scrubbing tower 3. The air inlet in the middle of the gas scrubbing tower 3 is used to introduce steam to be cooled. The atomized circulating liquid comes into full contact with the high-temperature steam, completing heat exchange. The air outlet at the top of the gas scrubbing tower 3 is used to discharge the treated clean air. The circulating heat after heat exchange enters the shell-and-tube heat exchanger 5, which heats the tap water in its tubes, raising its temperature. The heated tap water can then be used for cleaning in the extraction workshop. This achieves the goals of saving steam consumption during cleaning, reducing the risk of internal pressure buildup in the extraction tank during boiling, and reducing environmental pollution caused by secondary steam emissions.

[0029] This application can save on steam consumption during site clearing; in practical applications, using a shell-and-tube heat exchanger 5 with an inlet water temperature of 35℃ and an outlet water temperature of 80℃ can save on steam costs. It also reduces the risk of internal pressure buildup in the extraction tank during boiling. Furthermore, it reduces environmental pollution caused by secondary steam emissions.

[0030] Example 2, as Figure 1-2As shown, the extraction tank venting steam recovery and utilization system includes an extraction tank venting pipe 2 connected to the extraction tank body 1. Each extraction tank venting pipe 2 is equipped with an electrically controlled valve A to control the on / off state of the pipe. It also includes a gas scrubbing tower 3 with an outlet and a shell-and-tube heat exchanger 5. Multiple spray pipe assemblies 8 are fixedly installed on the inner top of the gas scrubbing tower 3. The inner bottom of the gas scrubbing tower 3 is a liquid storage chamber. The middle part of the gas scrubbing tower 3 has an air inlet that communicates with the extraction tank venting pipe 2. The hot fluid inlet of the shell-and-tube heat exchanger 5 is connected to the liquid outlet at the bottom of the gas scrubbing tower 3 through a circulation pipe A6. The hot fluid outlet of the shell-and-tube heat exchanger 5 is connected to the spray pipe assembly 8 of the gas scrubbing tower 3. A circulation pump group 4 is installed on the circulation pipe A6 to pump hot water from the liquid storage chamber into the shell-and-tube heat exchanger 5.

[0031] Furthermore, a filter 9 is installed on the circulation pipeline A6 between the gas scrubbing tower 3 and the circulation pump group 4.

[0032] Furthermore, the filter 9 is a Y-type filter, which can be used for filtering large particles in liquids, gases, or other media. Installed on pipelines, it removes larger solid impurities from fluids, ensuring the normal operation of machinery and equipment, including compressors, pumps, and instruments, thereby stabilizing the process and ensuring safe production. When fluid enters the filter cartridge containing a filter screen of a specific size, impurities are blocked, while clean filtrate is discharged from the filter outlet. When cleaning is required, simply remove the detachable filter cartridge, clean it, and reinstall it. Therefore, its use and maintenance are extremely convenient.

[0033] Furthermore, the gas scrubbing tower 3 has a demister 15 at its inner top for separating liquid droplets entrained in the gas flow.

[0034] Furthermore, the circulating pump assembly 4 includes a first circulating pump connected in series on the circulating pipeline A6, and a second circulating pump connected in parallel with the first circulating pump. The inlet of the second circulating pump is connected to the inlet of the first circulating pump via a pipeline, and the outlet of the second circulating pump is connected to the outlet of the first circulating pump via a pipeline. Electrically controlled valves B are installed on the pipelines connected to the inlets of both the first and second circulating pumps. The first and second circulating pumps can be started simultaneously or independently.

[0035] Furthermore, the cold fluid inlet of the shell-and-tube heat exchanger 5 is connected to a tap water pipe 10, and the cold fluid outlet of the shell-and-tube heat exchanger 5 is connected to an external drain pipe 11, which is then connected to the workshop hot water storage tank 12.

[0036] The secondary steam discharged from the extraction tank vent pipe 2 enters the gas scrubbing tower 3. The circulating water in the scrubbing tower is pumped into the shell-and-tube heat exchanger. The circulating water and secondary steam exchange heat within the scrubbing tower, causing the circulating water temperature to rise continuously. The tube side of the shell-and-tube heat exchanger 5 is circulated with tap water, while the shell side is circulated with circulating water. This heats the tap water in the tube side, raising its temperature, and it is then stored in the workshop hot water storage tank 12, which can be used for cleaning the extraction workshop. The extraction tank vent steam undergoes condensation and heat exchange within the scrubbing tower, effectively utilizing the secondary steam and reducing environmental pollution from the extraction tank vent steam.

[0037] Furthermore, a hot water supply pipe 13 is connected to the drain outlet of the hot water storage tank 12 in the workshop, and a water supply pump 14 is installed on the hot water supply pipe 13.

[0038] Furthermore, a first electrically controlled valve is installed at the connection between the circulation pipeline B7 and the shell-and-tube heat exchanger 5, a second electrically controlled valve is installed at the connection between the external discharge pipe 11 and the shell-and-tube heat exchanger 5, a third electrically controlled valve is installed at the connection between the tap water pipe 10 and the shell-and-tube heat exchanger 5, and a fourth electrically controlled valve is installed at the connection between the circulation pipeline A6 and the shell-and-tube heat exchanger 5. The electrically controlled valves can be opened and closed as needed.

[0039] Example 3, referring to Figure 3 The difference from Embodiment 2 is that an auxiliary circulation pipe 16 is connected to the water supply pipe 10 between the third solenoid valve and the shell-and-tube heat exchanger 5 via a tee. The other end of the auxiliary circulation pipe 16 is connected to the drain port of the workshop hot water storage tank 12. A fifth solenoid valve 17 and an auxiliary heating circulation pump 18 are installed on the auxiliary circulation pipe 16. If the water in the workshop hot water storage tank 12 is not used up on the same day, when it is used the next day, the third solenoid valve needs to be closed first, and the fifth solenoid valve 17 and the auxiliary heating circulation pump 18 need to be opened to heat the original water in the workshop hot water storage tank 12. After circulating and heating for a period of time, the fifth solenoid valve 17 and the auxiliary heating circulation pump 18 can be closed, and the third solenoid valve can be opened as needed to restore the original operation, so as to avoid the waste of water in the workshop hot water storage tank 12 due to the temperature not meeting the standard.

[0040] Project revenue calculation:

[0041] Our extraction workshop has a total of 42 extraction tanks. During the boiling and maintaining the temperature of the extraction tanks, all the secondary steam generated inside the tanks is discharged outdoors. Each extraction tank discharges steam for approximately 10 hours per day, totaling 42 extraction tanks. The secondary steam discharge temperature is approximately 100-110℃, and the amount of secondary steam discharged per hour is approximately 1.5-2 tons.

[0042] Steam consumption per hour for 8m³ of water (40℃ drinking water) heated to 80℃:

[0043] One ton of saturated steam at a pressure of 0.1 MPa condenses into water at 100°C, releasing approximately 22011000 kJ of heat, which is approximately 524,000 kcal.

[0044] When 1 m³ of water rises by 1°C, it absorbs 1000 kcal of heat.

[0045] Based on an average water consumption of 8m³ per hour, the steam saved per hour is: 8m³ * 40℃ * 1000 kcal / 524,000 kcal = 0.61 tons.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0047] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A system for recovering and utilizing steam from the venting of an extraction tank, comprising an extraction tank venting pipeline connected to the extraction tank body, wherein each set of extraction tank venting pipelines is equipped with an electrically controlled valve A for controlling the on / off state of the pipeline, characterized in that: It also includes a gas scrubbing tower with an outlet and a shell-and-tube heat exchanger. The top of the gas scrubbing tower is fixedly equipped with multiple spray pipe assemblies. The bottom of the gas scrubbing tower is a liquid storage chamber. The middle of the gas scrubbing tower has an air inlet that is connected to the exhaust pipe of the extraction tank. The hot fluid inlet of the shell-and-tube heat exchanger is connected to the liquid outlet at the bottom of the gas scrubbing tower through circulation pipe A. The hot fluid outlet of the shell-and-tube heat exchanger is connected to the spray pipe assembly of the gas scrubbing tower. A circulation pump set for pumping hot water in the liquid storage chamber into the shell-and-tube heat exchanger is installed on circulation pipe A.

2. The extraction tank venting steam recovery and utilization system according to claim 1, characterized in that, A filter is installed on the circulation pipeline A between the gas scrubbing tower and the circulation pump set.

3. The extraction tank venting steam recovery and utilization system according to claim 2, characterized in that, The filter is a Y-type filter.

4. The extraction tank venting steam recovery and utilization system according to any one of claims 1-3, characterized in that, The gas scrubbing tower has a demister at its inner top.

5. The extraction tank venting steam recovery and utilization system according to claim 4, characterized in that, The circulating pump set includes a first circulating pump connected in series on the circulating pipeline A, and a second circulating pump connected in parallel with the first circulating pump. The inlet of the second circulating pump is connected to the inlet of the first circulating pump through a pipeline, and the outlet of the second circulating pump is connected to the outlet of the first circulating pump through a pipeline. An electrically controlled valve B is installed on the pipelines connected to the inlets of the first circulating pump and the second circulating pump.

6. The extraction tank venting steam recovery and utilization system according to claim 5, characterized in that, The cold fluid inlet of the shell-and-tube heat exchanger is connected to a tap water pipe, and the cold fluid outlet of the shell-and-tube heat exchanger is connected to an external drain pipe, which is then connected to a hot water storage tank in the workshop.

7. The extraction tank venting steam recovery and utilization system according to claim 6, characterized in that, The hot water storage tank in the workshop is connected to a hot water supply pipe after its drain outlet, and a water supply pump is installed on the hot water supply pipe.

8. The extraction tank venting steam recovery and utilization system according to claim 7, characterized in that, A first electrically controlled valve is installed at the connection between the circulation pipeline B and the shell-and-tube heat exchanger; a second electrically controlled valve is installed at the connection between the external drain pipe and the shell-and-tube heat exchanger; a third electrically controlled valve is installed at the connection between the tap water pipe and the shell-and-tube heat exchanger; and a fourth electrically controlled valve is installed at the connection between the circulation pipeline A and the shell-and-tube heat exchanger.

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