Vacuum moisture regain steam recycling device

Abstract

The utility model belongs to the technical field of cigarette production equipment, and particularly relates to a vacuum moisture regaining steam recycling device which comprises an efficient energy storage tank, a condensate water cooling device and a steam using pipeline. The inlet end of the efficient energy storage tank is communicated with the outlet end of the vacuum damping machine through a first pipeline; a pressure control structure is arranged in the efficient energy storage tank and divides an inner cavity of the efficient energy storage tank into a low-pressure area and a high-pressure area. The bottoms of the low-pressure area and the high-pressure area are connected with a condensate water recovery interface, and the condensate water cooling device is mounted at the condensate water recovery interface; the steam using pipeline is arranged in the high-pressure area and is communicated with the efficient energy storage tank and steam using equipment; according to the vacuum damping machine, through the arrangement of the efficient energy storage tank, steam of the vacuum damping machine is directly recycled, the energy use efficiency of the vacuum damping machine is remarkably improved, and energy waste is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of cigarette production equipment, specifically relating to a vacuum rehumidification steam reuse device. Background Technology

[0002] In the cigarette manufacturing process, vacuum rehumidification is a step in tobacco leaf processing. Its main purpose is to increase the moisture content of tobacco leaves with low moisture content, thereby softening the leaves, increasing their resilience, making them easier to loosen, reducing breakage in subsequent processing, minimizing leaf loss, removing certain volatile compounds, and improving the smoking quality of the tobacco. However, the steam discharged from the vacuum rehumidifier after evacuation contains a large amount of unused heat energy, which, if not utilized, leads to energy waste.

[0003] Existing technology discloses a steam recovery and utilization device for a vacuum rehumidifier, including a vacuum rehumidifier, the outlet of which is connected to the top of an insulated water tank via a condenser pipe, the bottom of the insulated water tank extending into the tank via a condenser pipe, the water tank being connected to the top of the insulated water tank via a water delivery pipe, a water pump being installed on the water delivery pipe, the top of the insulated water tank being connected to a grading room via a steam delivery pipe, and one side of the grading room being connected to the inlet of the vacuum rehumidifier via a steam recovery and delivery pipe. However, this device recovers steam by recycling the condensed steam, resulting in low thermal energy utilization; furthermore, the recovered steam can only be used in scenarios with low temperature and pressure requirements. Therefore, it is necessary to improve the vacuum rehumidifier steam reuse device. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum rehumidification steam reuse device that can directly recover and utilize the residual steam of a vacuum rehumidifier with a high steam recovery and utilization rate; this addresses the problem mentioned in the background art that the steam recovery and utilization device for vacuum rehumidifiers has a low thermal energy utilization rate.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A vacuum rehumidification steam reuse device is disclosed for the recovery and reuse of steam from a vacuum rehumidification machine. The device includes a high-efficiency energy storage tank, a condensate cooling device, and a steam pipeline. The inlet of the high-efficiency energy storage tank is connected to the outlet of the vacuum rehumidification machine via a first pipeline. A pressure control structure is installed inside the high-efficiency energy storage tank, dividing its interior into a low-pressure zone and a high-pressure zone. Condensate recovery interfaces are connected to the bottom of both the low-pressure and high-pressure zones, and the condensate cooling device is installed at these interfaces. The steam pipeline is located in the high-pressure zone and connects the high-efficiency energy storage tank to the steam-using equipment.

[0007] In this application, the high-efficiency energy storage tank is used to store the steam after evacuation; during the steam flow process of the first pipeline, the high-efficiency energy storage tank and the steam use pipeline, the steam is not recovered through condensate; thus, the energy efficiency of the vacuum dehumidifier can be significantly improved and energy waste can be reduced.

[0008] Furthermore, a steam ejector pump is installed on the first pipeline, and the steam pressure at the outlet of the steam ejector pump is 0.8 to 1.0 MPa.

[0009] Furthermore, the pressure control structure includes a movable plate, which is disposed inside the high-efficiency energy storage tank; the movable plate is provided with a connecting channel connecting the low-pressure zone and the high-pressure zone, and a booster pump is provided on the connecting channel, with the inlet end of the booster pump connected to the low-pressure zone and the outlet end connected to the high-pressure zone.

[0010] Furthermore, the pressure control structure includes a piston, which is slidably installed inside the cavity of the high-efficiency energy storage tank. The sliding of the piston can change the volume ratio of the low-pressure zone and the high-pressure zone.

[0011] This application uses a pressure control structure to adjust the volume ratio between the low-pressure and high-pressure zones, or to control the pressure in the low-pressure zone. This ensures that the steam pressure in the high-efficiency energy storage tank is not higher than the steam pressure after the vacuum rehumidifier has been evacuated, thus avoiding a reduction in the evacuation performance of the vacuum rehumidifier. Furthermore, the pressure control structure can efficiently and reliably deliver steam to the steam-using pipeline, ensuring the continuity and stability of the steam supply to the steam-using equipment.

[0012] Furthermore, the high-efficiency energy storage tank is equipped with a monitoring interface, and a monitoring component is installed at the monitoring interface. The monitoring component is used to monitor the temperature, pressure and flow rate of steam in the low-pressure zone and the high-pressure zone.

[0013] Furthermore, the monitoring component is electrically connected to a controller, which is used to control the pressure control structure to change the pressure of the steam in the low-pressure zone based on the monitoring results of the monitoring component.

[0014] Furthermore, the high-efficiency energy storage tank is equipped with a heating element within the high-pressure zone to perform secondary vaporization of the steam within the high-pressure zone. This secondary vaporization by the heating element further improves the utilization rate of steam recovery and reuse, saving energy and achieving better energy conservation and emission reduction.

[0015] Furthermore, a second pipeline is connected between the steam supply pipeline and the inlet end of the vacuum dehumidifier, and the second pipeline is used to transmit the steam from the steam supply pipeline to the vacuum dehumidifier.

[0016] Furthermore, the first pipeline, the second pipeline, and the steam pipeline are all equipped with insulation layers; the insulation layers ensure that the pressure and temperature of the steam are stable during the transportation process, while reducing pipeline losses and heat loss.

[0017] The utility model employing the above technical solution has the following advantages:

[0018] In this application, a high-efficiency energy storage tank is used to store the evacuated steam. During the steam flow through the first pipeline, the high-efficiency energy storage tank, and the steam-using pipeline, steam is not recovered via condensate. This significantly improves the energy efficiency of the vacuum dehumidifier and reduces energy waste. Simultaneously, by adjusting the volume ratio of the low-pressure and high-pressure zones or controlling the pressure in the low-pressure zone through a pressure control structure, it can be ensured that the steam pressure in the high-efficiency energy storage tank does not exceed the steam pressure after evacuation by the vacuum dehumidifier, thus avoiding a reduction in the vacuum dehumidifier's evacuation performance. Furthermore, the pressure control structure efficiently and reliably delivers steam to the steam-using pipeline, ensuring the continuity and stability of the steam supply to the steam-using equipment.

[0019] In this application, the device enables efficient energy utilization of the vacuum rehumidifier, reduces energy consumption and steam waste, thereby improving the production efficiency and economic benefits of the tobacco industry; at the same time, the device also helps to reduce production costs and enhance the market competitiveness of enterprises. Attached Figure Description

[0020] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0021] Figure 1 This is a schematic diagram illustrating the principle of a vacuum rehumidification steam reuse device according to this utility model.

[0022] Figure 2 This is a schematic diagram of the principle of a vacuum rehumidification steam reuse device in the prior art;

[0023] The symbols for the main components are explained below:

[0024] 101. Steam ejector pump; 102. High-efficiency energy storage tank; 103. Condensate cooling device; 104. Low-pressure zone; 105. High-pressure zone; 106. Steam pipeline; 107. Booster pump; 108. Piston; 109. Secondary vaporization zone; 110. Condensate recovery interface; 201. Jet pump; 202. Spray system; 203. Steam cooling collection tank; 204. Circulating water pump; 205. Circulating water cooling system; 206. Circulating water pool; 207. Spray water pump. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0026] like Figure 1 As shown, in one embodiment, a vacuum rehumidification steam reuse device is provided for the recovery and reuse of steam from a vacuum rehumidifier. The device includes a high-efficiency energy storage tank 102, a condensate cooling device 103, and a steam pipeline 106. The inlet end of the high-efficiency energy storage tank 102 is connected to the outlet end of the vacuum rehumidifier via a first pipeline. Steam evacuated by the vacuum rehumidifier enters the high-efficiency energy storage tank 102 through the first pipeline and is stored there. A pressure control structure is provided inside the high-efficiency energy storage tank 102 to control the pressure of the high-efficiency energy storage tank 102. The inner cavity is divided into a low-pressure zone 104 and a high-pressure zone 105. The steam pressure in the low-pressure zone 104 is lower than the steam pressure after evacuation. A condensate recovery interface 110 is connected to the bottom of both the low-pressure zone 104 and the high-pressure zone 105. A condensate cooling device 103 is installed at the condensate recovery interface 110. The condensate generated by the condensate cooling device 103 is recycled through a recovery pipeline. A steam pipeline 106 is located in the high-pressure zone 105 and connects to a high-efficiency energy storage tank 102 and the steam-using equipment. The steam-using equipment includes: feeders, drying machines, and rehumidifiers in the yarn-making workshop. For the rehumidifier, the steam recovered by this device can be used as a supplement; generally, it can be used by feeders, drying machines, and other equipment. When the vacuum rehumidifier is working, the recovered steam can meet the needs of most equipment in the workshop that requires steam; additionally, some steam can be supplied by the factory boiler to meet the workshop's complete needs.

[0027] In this embodiment, the high-efficiency energy storage tank 102 is used to store the evacuated steam. Common manufacturing materials include stainless steel, carbon steel, fiberglass, aluminum alloy, and plastics. The high-efficiency energy storage tank 102 can be made of stainless steel or fiberglass to ensure excellent pressure resistance, corrosion resistance, and lightweight properties. Furthermore, fiberglass energy storage tanks have superior insulation performance, making them suitable for steam requiring temperature control; they can withstand high-temperature and high-pressure environments while possessing good insulation performance to reduce heat loss. The condensate cooling device 103 includes a condenser and a refrigeration pipe connected to the condenser; the refrigeration pipe provides cooling capacity to the condenser, and the steam output from the condensate recovery interface 110. During the flow of steam through the first pipeline, the high-efficiency energy storage tank 102, and the steam-using pipeline 106, it does not condense or lose excessive energy. Upon reaching the steam-using equipment, steam is not recovered through condensate; thus, the energy efficiency of the vacuum dehumidifier can be significantly improved, reducing energy waste.

[0028] In this embodiment, a steam ejector pump 101 is installed on the first pipeline. The steam pressure at the outlet of the steam ejector pump 101 is 0.8 to 1.0 MPa; in practice, it may be 0.8 MPa, 0.9 MPa, or 1.0 MPa, or other range values. The steam ejector pump 101 is used to evacuate the vacuum rehumidifier. The evacuated steam can be stored in a high-efficiency energy storage tank 102. A steam pump is installed in the high-efficiency energy storage tank 102 to extract the stored steam from the high-efficiency energy storage tank 102 and deliver it to steam-using equipment that requires low-pressure steam, thereby realizing the recovery and reuse of steam.

[0029] For example, the pressure control structure includes a movable plate, which is disposed inside the high-efficiency energy storage tank 102; the movable plate is provided with a connecting channel connecting the low-pressure zone 104 and the high-pressure zone 105, and a booster pump 107 is provided on the connecting channel. The inlet end of the booster pump 107 is connected to the low-pressure zone 104 and the outlet end is connected to the high-pressure zone 105; the booster pump 107 extracts the stored steam from the high-efficiency energy storage tank 102 and delivers it to the steam-using equipment that requires low-pressure steam. The structure is simple and highly practical.

[0030] For example, the pressure control structure includes a piston 108, which is slidably installed inside the high-efficiency energy storage tank 102. The sliding of the piston 108 can change the volume ratio of the low-pressure zone 104 and the high-pressure zone 105. For example, if the volume of the low-pressure zone 104 increases and the volume of the high-pressure zone 105 decreases, the steam pressure of the low-pressure zone 104 decreases and the steam pressure of the high-pressure zone 105 increases; if the volume of the low-pressure zone 104 decreases and the volume of the high-pressure zone 105 increases, the steam pressure of the low-pressure zone 104 increases and the steam pressure of the high-pressure zone 105 decreases. Of course, the volume ratio of the low-pressure zone 104 and the high-pressure zone 105 can also be maintained at a constant value. The piston 108 uses increased space capacity to reduce pressure and avoid back pressure. This method of increasing the volume of the container to reduce pressure does not require other equipment. The pressure can be adjusted by the size of the space. The structure is simple, the control is convenient, the cost is low, and the practicality is high. In the above embodiments, by adjusting the volume ratio of the low-pressure zone 104 and the high-pressure zone 105 through the pressure control structure, or by controlling the pressure of the low-pressure zone 104, it can be ensured that the steam pressure of the high-efficiency energy storage tank 102 is not higher than the steam pressure after the vacuum rehumidifier is evacuated, so as to avoid reducing the evacuation performance of the vacuum rehumidifier; and the pressure control structure can efficiently deliver steam to the steam-using pipeline 106, which is stable and reliable, so as to ensure the continuity and stability of the steam supply to the steam-using equipment.

[0031] For example, piston 108 and booster pump 107 can be set up simultaneously. In this way, the steam pressure in high-pressure zone 105 can be controlled by the cooperation of piston 108 and booster pump 107, which is more efficient and more convenient to control.

[0032] For example, the vacuum rehumidification steam reuse device in this embodiment was tested in a cigarette production workshop of a certain factory. From October 11th to 28th, a total of 34 batches were produced, producing 226,000 kg. At a rate of 4,000 kg / h, the production time was 56.5 hours, consuming 62.2 tons (62,200 kg) of steam. The average steam consumption per batch (hour) was 1,100.88 kg. Taking the drying machine as an example: the steam working pressure of a brand-name drying machine is 0.3 MPa, the actual pressure is 0.03-0.05 MPa, and the flow rate is 300 kg / h. The steam working pressure of a dedicated drying machine is around 0.5 MPa, the actual pressure is 0.18-0.25 MPa, and the flow rate is around 500 kg / h. The recovered steam fully meets the needs of the drying machine. Therefore, the waste steam from the vacuum rehumidification machine can be completely recovered to meet the needs of other steam-using equipment in the cigarette-making workshop besides the vacuum rehumidification machine, achieving efficient and energy-saving energy utilization.

[0033] To improve the automation level of this device, in this embodiment, a monitoring interface is provided on the high-efficiency energy storage tank 102. Two sets of monitoring interfaces are provided, corresponding to the low-pressure zone 104 and the high-pressure zone 105 respectively. Each set of monitoring interfaces is equipped with monitoring components, namely a temperature sensor, a pressure sensor, and a flow sensor, used to monitor the temperature, pressure, and flow rate of steam in the low-pressure zone 104 and the high-pressure zone 105. Furthermore, the monitoring components are electrically connected to a controller, which controls the pressure control structure to change the pressure of the steam in the low-pressure zone 104 based on the monitoring results. Simultaneously, when the pressure of the steam in the low-pressure zone 104 changes, the pressure of the steam in the high-pressure zone 105 will change accordingly.

[0034] In fact, such as Figure 2 As shown, the existing vacuum rehumidification steam reuse device includes a steam cooling collection tank 203, a spray system 202 installed on the top of the steam cooling collection tank 203, a circulating water cooling system 205 connected to the steam cooling collection tank 203, and a circulating water pool 206. The inlet end of the steam cooling collection tank 203 is connected to the outlet end of the vacuum rehumidifier through a jet pump 201, and the steam pressure pumped by the jet pump 201 is 0.8-1.0 MPa. The steam in the steam cooling collection tank 203 is cooled by the spray system 202, and the steam pressure in the steam cooling collection tank 203 is 0.5 MPa. A circulating water pump 204 is installed at the bottom of the steam cooling collection tank 203 to supply water to the circulating water cooling system 205 and the circulating water pool 206. A spray water pump 207 is installed in the circulating water pool 206 to supply water to the spray system 202. This steam recovery method mainly recovers condensed steam, resulting in a thermal energy utilization rate that is 80% lower than the vacuum rehumidification steam reuse device described in the previous embodiment. Furthermore, the recovered steam has a low pressure, limiting its use to steam-consuming equipment with low steam pressure requirements, leading to low utilization of the recovered steam. The spray system and circulating water cooling system are conventional components.

[0035] like Figure 1 As shown, in this embodiment, the high-efficiency energy storage tank 102 is equipped with a heating element in the high-pressure zone 105 to form a secondary vaporization zone 109, which is used to vaporize the steam in the high-pressure zone.

[0036] The heating element can be an electric heating wire, which performs secondary vaporization on the steam in the high-pressure zone 105, and then outputs it to the steam-using equipment through the steam pipeline 106. In this way, the secondary vaporization of the heating element in the secondary vaporization zone 109 can further improve the utilization rate of steam recovery and reuse, save energy, and achieve better energy conservation and emission reduction.

[0037] In this embodiment, a second pipeline is connected between the steam pipeline 106 and the inlet end of the vacuum rehumidifier. The second pipeline is used to transmit the steam from the steam pipeline to the vacuum rehumidifier. This allows the recovered steam to re-enter the vacuum rehumidifier, improving the efficiency of steam recovery and reuse.

[0038] For example, the first pipeline, the second pipeline, and the steam pipeline 106 are all equipped with insulation layers; the insulation layers can be made of high-temperature resistant and heat-insulating asbestos, which is wrapped around the outer wall of the pipeline; or other materials with insulation functions. The insulation layers ensure stable pressure and temperature of steam during transportation, while reducing pipeline losses and heat loss.

[0039] For example, the first pipeline, the second pipeline, and the steam supply pipeline 106 can all be steam pipelines. Steam pipelines can take into account the pressure, flow rate, and temperature limitations of steam to achieve steam transportation. Furthermore, steam pipelines ensure stable pressure and temperature of steam during transportation, while reducing pipeline losses and heat loss. The pipeline materials of steam pipelines have good high temperature resistance and pressure resistance, and are easy to integrate with insulation layers for appropriate insulation treatment.

[0040] This embodiment provides a vacuum rehumidification steam reuse device. It stores the evacuated steam in a high-efficiency energy storage tank 102. During the steam flow through the first pipeline, the high-efficiency energy storage tank 102, and the steam-using pipeline 106, steam is directly recovered without condensate. This significantly improves the energy efficiency of the vacuum rehumidifier and reduces energy waste. Simultaneously, a pressure control structure adjusts the volume ratio of the low-pressure zone 104 and the high-pressure zone 105 to control the pressure in the low-pressure zone 104, ensuring that the steam pressure in the high-efficiency energy storage tank 102 does not exceed the steam pressure after evacuation, thus avoiding a reduction in the vacuum rehumidifier's evacuation performance. Furthermore, the pressure control structure efficiently and reliably delivers steam to the steam-using pipeline 106, guaranteeing the continuity and stability of the steam supply to the steam-using equipment. The controller monitors and controls the pressure and flow rate of each pipeline, resulting in a high degree of automation, strong practicality, and broad market potential.

[0041] The above provides a detailed description of a vacuum rehumidification steam reuse device provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vacuum dehumidification steam reuse device for steam recovery and reuse in a vacuum dehumidification machine, characterized in that, The system includes a high-efficiency energy storage tank (102), a condensate cooling device (103), and a steam pipeline (106). The inlet end of the high-efficiency energy storage tank (102) is connected to the outlet end of the vacuum dehumidifier via a first pipeline. A pressure control structure is provided inside the high-efficiency energy storage tank (102), which divides the inner cavity of the high-efficiency energy storage tank (102) into a low-pressure zone (104) and a high-pressure zone (105). A condensate recovery interface (110) is connected to the bottom of the low-pressure zone (104) and the high-pressure zone (105), and the condensate cooling device (103) is installed at the condensate recovery interface (110). The steam pipeline (106) is located in the high-pressure zone (105) and connects the high-efficiency energy storage tank (102) to the steam-using equipment.

2. The vacuum rehumidification steam reuse device according to claim 1, characterized in that, A steam ejector pump (101) is installed on the first pipeline.

3. The vacuum rehumidification steam reuse device according to claim 1, characterized in that, The pressure control structure includes a movable plate, which is disposed inside the high-efficiency energy storage tank (102); the movable plate is provided with a connecting channel connecting the low-pressure zone (104) and the high-pressure zone (105), and a booster pump (107) is provided on the connecting channel, with the inlet end of the booster pump (107) connected to the low-pressure zone (104) and the outlet end connected to the high-pressure zone (105).

4. The vacuum rehumidification steam reuse device according to claim 1, characterized in that, The pressure control structure includes a piston (108), which is slidably installed in the inner cavity of the high-efficiency energy storage tank (102). The sliding of the piston (108) can change the volume ratio of the low-pressure zone (104) and the high-pressure zone (105).

5. The vacuum rehumidification steam reuse device according to claim 3 or 4, characterized in that, The high-efficiency energy storage tank (102) is provided with a monitoring interface, and a monitoring component is provided at the monitoring interface. The monitoring component is used to monitor the temperature, pressure and flow rate of steam in the low-pressure zone (104) and high-pressure zone (105).

6. The vacuum rehumidification steam reuse device according to claim 5, characterized in that, The monitoring component is electrically connected to a controller, which is used to control the pressure control structure to change the pressure of steam in the low-pressure zone (104) according to the monitoring results of the monitoring component.

7. The vacuum rehumidification steam reuse device according to claim 1, characterized in that, The high-efficiency energy storage tank (102) is equipped with a heating element in the high-pressure zone (105) for secondary vaporization of the steam in the high-pressure zone (105).

8. The vacuum rehumidification steam reuse device according to claim 1 or 7, characterized in that, A second pipeline is connected between the steam supply pipeline (106) and the inlet end of the vacuum dehumidifier. The second pipeline is used to transmit the steam from the steam supply pipeline (106) to the vacuum dehumidifier.

9. The vacuum rehumidification steam reuse device according to claim 8, characterized in that, The first pipeline, the second pipeline and the steam pipeline (106) are all provided with insulation layers.

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