CN216385163U - Tobacco vacuum moisture regaining machine of indirect cooling composite vacuum device - Google Patents
Tobacco vacuum moisture regaining machine of indirect cooling composite vacuum device Download PDFInfo
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- CN216385163U CN216385163U CN202122921057.3U CN202122921057U CN216385163U CN 216385163 U CN216385163 U CN 216385163U CN 202122921057 U CN202122921057 U CN 202122921057U CN 216385163 U CN216385163 U CN 216385163U
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Abstract
The utility model provides a tobacco vacuum moisture regaining machine of an indirect cooling composite vacuum device, which effectively solves the technical problems that the evacuation time is prolonged due to more accumulated water, the overflowing part of a mechanical vacuum pump is easily rusted by water vapor, the emulsification probability of lubricating oil is increased, and the maintenance cost is increased in the background technology. The device comprises a refrigerating unit and a condensing tower structure communicated with a moisture regain box body through a first pipeline, wherein the upper end of the condensing tower structure is communicated with a filter, the filter is communicated with a steam catcher, the steam catcher is connected with a roots pump and a second vacuum valve which are connected in parallel, outlets of the roots pump and the second vacuum valve are connected in parallel on a first vacuum valve, and the first vacuum valve is connected on a screw vacuum pump; the steam trap is composed of a steam trap shell and a steam trap coil in the steam trap shell, the steam trap coil is indirectly supplied with a cold source by a refrigerating unit through a cold tank, and the filter and the roots pump are communicated in the steam trap shell of the steam trap.
Description
Technical Field
The utility model relates to the tobacco industry, in particular to a tobacco vacuum moisture regaining machine of an indirect cooling composite vacuum device.
Background
The tobacco vacuum moisture regaining machine is a main device in the tobacco processing process, and the working principle is as follows: placing tobacco leaves with the water content of about 12 percent in a vacuum box, evacuating to remove air in the tobacco leaves, and filling steam into the vacuum box after evacuating to a set vacuum degree, so that the tobacco leaves become moist and soft under the action of heat and mass transfer and are convenient for subsequent processing; depending on the process requirements, the evacuation and humidification process may last several times.
When the vacuum moisture regaining machine is in normal production, steam is charged into the vacuum box for many times, condensed water with the temperature of more than 50 ℃ is always stored in the vacuum box, when the vacuum moisture regaining machine is pumped to 16kPa, the condensed water starts to boil, and the evaporated steam inevitably becomes a newly added load of a vacuum unit; when the pressure is pumped to 0.9kPa, the volume of the water vapor is increased by about 14 ten thousand times compared with the original liquid volume, and the newly added load is undoubtedly huge; therefore, the condensed water in the box of the vacuum moisture regaining machine has great negative influence on the mechanical vacuum pump set, the air extraction time is prolonged, the overflowing parts of the mechanical vacuum pump are easily corroded by the water vapor, the emulsification probability of the lubricating oil is increased, and the maintenance cost is increased.
There is the patent to propose, clear away the ponding in the vacuum box with mechanical scraper blade, or compressed air jetting's mode, its shortcoming has three: (1) accumulated water is not thoroughly removed; (2) when the air is evacuated for the second time or the third time, accumulated water in the box cannot be removed; (3) the evaporation of the water vapor of the tobacco leaves is also pumped by the vacuum pump.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a tobacco vacuum moisture regaining machine of an indirect cooling composite vacuum device, which effectively solves the technical problems of prolonging the evacuation time caused by poor accumulated water removal, easily rusting the overflowing part of a mechanical vacuum pump by water vapor, increasing the emulsification probability of lubricating oil and increasing the maintenance cost in the background technology.
The technical solution of the utility model is as follows: a tobacco vacuum moisture regaining machine of an indirect cooling composite vacuum device comprises a refrigerating unit and a condensing tower structure communicated with a moisture regaining box body through a first pipeline, wherein the upper end of the condensing tower structure is communicated with a filter, the filter is communicated with a steam catcher, the steam catcher is connected with a roots pump and a second vacuum valve which are connected in parallel, outlets of the roots pump and the second vacuum valve are connected in parallel on a first vacuum valve, and the first vacuum valve is connected on a screw vacuum pump;
the steam trap is composed of a steam trap shell and a steam trap coil in the steam trap shell, the steam trap coil is indirectly supplied with a cold source by a refrigerating unit through a cold tank, and the filter and the roots pump are communicated in the steam trap shell of the steam trap.
Preferably, the lower part of the steam capture shell is communicated with a liquid accumulation tank through a first vacuum stop valve, and the side wall and the lower end of the liquid accumulation tank are respectively communicated with a second vacuum stop valve and a third vacuum stop valve.
Preferably, an evaporator of the refrigerating unit is arranged in the cold tank, the steam capture coil is connected with a first circulating pump through an eighth vacuum stop valve, the first circulating pump is communicated in the cold tank through a fourth vacuum stop valve, and the cold tank is communicated on the steam capture coil through a fifth vacuum stop valve.
Preferably, the refrigerating unit comprises a compressor, the compressor is connected with a separator, the separator is connected with a condenser, the condenser is connected with a dryer, the dryer is connected to an inlet of the evaporator through a thermal expansion valve, and an outlet of the evaporator is connected to the compressor.
Preferably, the condensing tower structure includes the condensing tower casing, the moisture regain box is connected on the condensing tower casing through first pipe connection, is equipped with the third vacuum valve on the first pipeline, condensing tower casing lower extreme is connected with vacuum water tank through the fourth vacuum valve, vacuum water tank is connected with the second circulating pump through first check valve, the second circulating pump is connected with the second check valve through the sixth vacuum stop valve, and the second check valve is connected with the return water pipeline, the return water pipeline passes through the cooling tower intercommunication in circulation tank, circulation tank lower extreme intercommunication has the seventh vacuum stop valve, the lower part of circulation tank lateral wall is connected at the spray set of condensing tower casing lateral wall internal fixation through working shaft, third check valve, fifth vacuum valve intercommunication.
Preferably, a demister is arranged in a condensation tower shell at the upper part of the spraying device.
The utility model has the beneficial effects that:
1. when the vacuum pump carries out evacuation, the moisture that takes out in the moisture regain box passes through the condensing tower earlier, and most moisture condenses to keep in vacuum water tank behind the water, and the vapor that is not condensed is got rid of behind defroster, filter, the catch vapour ware, and residual gas is discharged through the vacuum pump. Because the moisture in the air is removed, the load of the vacuum pump is greatly reduced, thereby ensuring the high-efficiency and normal operation of the vacuum pump.
2. The refrigerating unit provides a cold source for the steam trap, so that moisture entering the steam trap is condensed and discharged.
3. Through the tertiary dehumidification of condensing tower, defroster and catch vapour ware, the low temperature low pressure water vapor in the pumped gas is got rid of effectively, has guaranteed high efficiency, the normal operating of vacuum pump.
4. Through the filter, the solid impurities in the gas are effectively filtered, and the normal operation and the service life of equipment such as a vacuum pump and the like are further ensured.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: a first pipeline 1, a moisture regain box body 2, a filter 3, a steam trap 4, a roots pump 5, a screw vacuum pump 7, a first vacuum valve 8, a second vacuum valve 9, a steam trap shell 10, a steam trap coil 11, a first vacuum stop valve 12, a liquid accumulation tank 13, a second vacuum stop valve 14, a third vacuum stop valve 15, an evaporator 16, a cold tank 17, an eighth vacuum stop valve 18, a first circulating pump 19, a fourth vacuum stop valve 20, a fifth vacuum stop valve 21, a compressor 22, a separator 23, a condenser 24, a dryer 25, a thermostatic expansion valve 27, a condenser shell 28, a third vacuum valve 29, a fourth vacuum valve 30, a vacuum water tank 31, a first check valve 32, a second circulating pump 33, a sixth vacuum stop valve 34, a second check valve 35, a water return pipeline 36, a cooling tower 37, a circulating water tank 38, a seventh vacuum stop valve 39, a water supply pump 40, a third check valve 41, a fifth vacuum valve 42 and a demister 43.
Detailed Description
The utility model is further explained with reference to the drawings.
In the utility model, the condensing tower structure is that the lower part of the condensing tower shell 28 is connected to the vacuum water tank 31 through the fourth vacuum valve 30, and the fourth vacuum valve 30 is not opened when the condensing tower is first vacuumized; the fourth vacuum valve 30 is opened at the second and third times of evacuation, since the lower portion of the vacuum water tank 31 is connected to the second circulation pump 33 through the first check valve 32, when the vacuum pump is used for evacuating the moisture regain box body 2 for the second time and the third time, due to the action of the first check valve 32, the vacuum in the box body can be ensured not to be damaged, the second circulating pump 33 is not opened during the vacuum pumping, the condensed water flowing out from the lower part of the condensing tower shell 28 flows into the vacuum water tank 31, when the vacuumizing is stopped, the second circulating pump 33 is turned on, the vacuum water tank 31 is emptied, the first check valve 32 is opened under the action of water pressure, water in the vacuum water tank 31 is pumped into the circulating water tank 38 through the water return pipeline 36 by the second circulating pump 33, and the water return pipeline 36 is cooled by the cooling tower 37 before entering the circulating water tank 38, so that the water temperature of the circulating water tank 38 meets the use requirement; in the process of vacuumizing, the water supply pump 40 is started, so that cooling water in the circulating water tank 38 is sprayed out through a spraying device on the upper part of the condensation tower, the spraying device cools gas entering from the moisture regain box body 2, a large amount of water vapor is condensed into liquid and falls down, the residual gas is demisted through a demister, solid impurities in the gas are filtered through a filter 3, low-temperature low-pressure water vapor in the gas is further condensed through a vapor catcher 4, the moisture content in the gas is further removed, and the gas is discharged through a vacuum pump.
The steam trap 4 is equivalent to a tubular heat exchanger, an evaporator 16 of a refrigerating unit is arranged in a cold tank 17 to cool a medium in the cold tank 17, two ends of a steam trap coil 11 of the steam trap 4 are respectively connected in the cold tank 17, the medium circulates in the steam trap coil 11 and the cold tank 17 through a first circulating pump 19 in the middle, the cooled medium is continuously brought into the steam trap coil 11, and the space in the steam trap shell 10 is refrigerated by the steam trap coil 11, so that low-temperature and low-pressure water vapor passing through the steam trap shell 10 is condensed. In the process of carrying out the evacuation, first vacuum stop valve 12 on hydrops jar 13 upper portion is opened, second and third vacuum stop valve 14, 15 are closed, keep vacuum state this moment, catch in the condensate water outflow hydrops jar 13 of vapour casing 10, when needs drain, close first vacuum stop valve 12 on upper portion, guarantee the vacuum degree on first vacuum stop valve 12 upper portion, open second vacuum stop valve 14 and third vacuum stop valve 15, the purpose that second vacuum stop valve 14 was opened is the broken air admission, make the condensate water discharge smoothly from following third vacuum stop valve 15.
The first vacuum valve 8 connected between the roots pump 5 and the screw vacuum pump 7 has the function that the vacuum pump is closed after the vacuum pumping is finished, the vacuum degree in a loop can be kept, the energy conservation is facilitated, the vacuum valve can be removed, and the primary vacuum is obtained through the screw vacuum pump 7 when the vacuum pumping is finished again. And the second vacuum valve 9 connected in parallel with the outlet of the Roots pump 5, also called bypass valve, can form short circuit to the Roots pump 5, directly uses the screw vacuum pump 7 to evacuate the system loop during primary vacuum, and opens the second vacuum valve 9.
When the utility model is used, the operation process of the first vacuum pumping is as follows: firstly, the moisture regaining box body 2 is vacuumized to 8kpa by using the screw vacuum pump 7 (before the second vacuum valve 9 is opened, the roots pump 5 is short-circuited), then the second vacuum valve 9 is closed, the roots pump 7 is opened, and the vacuum degree is vacuumized to reach the working vacuum degree, for example, the working vacuum degree can be 400 pa and 1000 pa.
When the first evacuation is performed, the evacuated medium in the moisture regain box 2 is low-temperature steam (without medium-temperature steam) generated by gasifying air and accumulated condensed water, and the air is exhausted through the vacuum valve, the condensing tower, the demister, the filter 3, the steam trap 4 and the vacuum pump when the evacuation is performed. In the later stage of vacuum pumping, a large amount of condensed water in the box body is gasified, and low-temperature and low-pressure water vapor is condensed into condensed water in the steam catcher 4, so that the load of the vacuum pump is reduced; the cold water circulation system of the condensing tower is not started when the first evacuation is carried out.
After the first vacuumizing, steam is sprayed into the moisture regain box body 2, tobacco leaves are moisturized, secondary vacuumizing is conducted after moisturizing is finished, because a large amount of water vapor exists in the moisture regain box body 2, a cold water circulating system is started firstly, the water vapor is discharged from the box body and condensed into water in the cooling tower 28 and temporarily stored in the vacuum water tank 31, the water vapor which is not condensed passes through the demister 43, the filter 3 and the steam catcher 4 and then is discharged through the second vacuum valve 9 and the screw vacuum pump 7, at the moment, the tobacco leaves are humidified, the secondary vacuumizing is not conducted until the roots vacuum pump is started, and otherwise, the moisture of the tobacco leaves can be evaporated under high vacuum. The wet air can be humidified for the second time and is reversely pumped according to the requirement.
When the tobacco leaves are finally exhausted, the reverse pumping is needed, the reverse pumping has the function of pumping redundant dead steam in the box body, the temperature of the tobacco leaves can also be adjusted, the temperature balance is ensured, then the tobacco leaves are broken empty, and the tobacco leaves are output.
The utility model adopts the indirect condensation and vacuum composite technology, and condenses the low-temperature low-pressure water vapor generated in the evacuation process into liquid through the vapor catcher, thereby reducing the working load of the vacuum pump, reducing the installed power of the vacuum system, protecting the mechanical vacuum pump set from steam corrosion and shortening the evacuation time; compared with the traditional equipment, the method achieves the same technological parameters, can obviously reduce the installed power or save the working time, and achieves the purposes of saving energy consumption and improving the running reliability of the equipment.
In the above description, steam with a temperature lower than 32 ℃ is referred to as low-temperature steam, and (32-100) ° c is referred to as medium-temperature steam.
Claims (6)
1. A tobacco vacuum moisture regaining machine of an indirect cooling composite vacuum device is characterized by comprising a refrigerating unit and a condensing tower structure communicated with a moisture regaining box body (2) through a first pipeline (1), wherein the upper end of the condensing tower structure is communicated with a filter (3), and the filter (3) is communicated with a steam catcher (4);
the steam catcher is connected with a roots pump (5) and a second vacuum valve (9) which are connected in parallel, outlets of the roots pump (5) and the second vacuum valve (9) are connected in parallel on a first vacuum valve (8), and the first vacuum valve (8) is connected on a screw vacuum pump (7);
the steam trap (4) is composed of a steam trap shell (10) and a steam trap coil (11) in the steam trap shell (10), the steam trap coil (11) is communicated with the refrigerating unit and is supplied with a cold source by the refrigerating unit, and the filter (3) and the first-stage roots pump (5) are communicated in the steam trap shell (10) of the steam trap (4).
2. The tobacco vacuum moisture regaining machine of the indirect cooling composite vacuum device according to claim 1, characterized in that the lower part of the steam-catching shell (10) is communicated with a liquid-collecting tank (13) through a first vacuum stop valve (12), and the side wall and the lower end of the liquid-collecting tank (13) are respectively communicated with a second vacuum stop valve (14) and a third vacuum stop valve (15).
3. The tobacco vacuum moisture regaining machine of the indirect cooling composite vacuum device according to claim 1, wherein an evaporator (16) of the refrigerating unit is arranged in a cooling tank (17), the steam capturing coil (11) is connected with a first circulating pump (19) through an eighth vacuum stop valve (18), the first circulating pump (19) is communicated in the cooling tank (17) through a fourth vacuum stop valve (20), and the cooling tank (17) is communicated on the steam capturing coil (11) through a fifth vacuum stop valve (21).
4. A tobacco vacuum conditioner of indirect cooling combined vacuum device according to claim 3, characterized in that the refrigerating unit comprises a compressor (22), the compressor (22) is connected with a separator (23), the separator (23) is connected with a condenser (24), the condenser (24) is connected with a dryer (25), the dryer (25) is connected with the inlet of the evaporator (16) through a thermal expansion valve (27), and the outlet of the evaporator (16) is connected with the compressor (22).
5. The tobacco vacuum moisture regaining machine of the indirect cooling composite vacuum device according to claim 1, wherein the condensing tower structure comprises a condensing tower shell (28), the moisture regaining box body (2) is connected to the condensing tower shell (28) through a first pipeline (1), a third vacuum valve (29) is arranged on the first pipeline (1), the lower end of the condensing tower shell (28) is connected with a vacuum water tank (31) through a fourth vacuum valve (30), the vacuum water tank (31) is connected with a second circulating pump (33) through a first one-way valve (32), the second circulating pump (33) is connected with a second one-way valve (35) through a sixth vacuum stop valve (34), the second one-way valve (35) is connected with a water return pipeline (36), the water return pipeline (36) is communicated in a circulating water tank (38) through a cooling tower (37), and the lower end of the circulating water tank (38) is communicated with a seventh vacuum stop valve (39), the lower part of the side wall of the circulating water tank (38) is communicated with a spraying device fixed in the upper part of the side wall of the condensing tower shell (28) through a water supply pump (40), a third one-way valve (41) and a fifth vacuum valve (42).
6. The tobacco vacuum moisture regaining machine of the indirect cooling compound vacuum device as claimed in claim 5, wherein a demister (43) is installed in the condensing tower housing (28) at the upper part of the spraying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122921057.3U CN216385163U (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of indirect cooling composite vacuum device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122921057.3U CN216385163U (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of indirect cooling composite vacuum device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216385163U true CN216385163U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122921057.3U Active CN216385163U (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of indirect cooling composite vacuum device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216385163U (en) |
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2021
- 2021-11-26 CN CN202122921057.3U patent/CN216385163U/en active Active
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