CN113974197A - Tobacco vacuum moisture regaining machine of combined type vacuum apparatus - Google Patents
Tobacco vacuum moisture regaining machine of combined type vacuum apparatus Download PDFInfo
- Publication number
- CN113974197A CN113974197A CN202111416704.3A CN202111416704A CN113974197A CN 113974197 A CN113974197 A CN 113974197A CN 202111416704 A CN202111416704 A CN 202111416704A CN 113974197 A CN113974197 A CN 113974197A
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- Prior art keywords
- vacuum
- pump
- valve
- shell
- moisture
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Classifications
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
- F28B9/06—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
Abstract
The invention provides a tobacco leaf vacuum moisture regaining machine of a combined type vacuum device, which effectively solves the technical problems that in the background technology, the accumulated water removing effect is poor during vacuumizing, the vacuumizing time is prolonged, water vapor easily causes corrosion to an overflowing part of a mechanical vacuum pump, the emulsifying probability of lubricating oil is increased, and the maintenance cost is increased. When the vacuum pump carries out the evacuation, the moisture that will take out in the box from the conditioning is earlier through condensing tower with most moisture condensation water, keeps in the vacuum water tank, and the moisture in the vapor process defroster, filter, the catch vapour ware that is not condensed gets rid of the air, then discharges in entering into the vacuum pump. At the moment, because the moisture in the air is removed, the load of the vacuum pump is greatly reduced, and the normal operation of the vacuum pump is ensured.
Description
Technical Field
The invention relates to the tobacco industry, in particular to a tobacco vacuum moisture regaining machine of a combined type 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.
Disclosure of Invention
In order to solve the problems, the invention provides a tobacco leaf vacuum moisture regaining machine with a combined type vacuum device, which effectively solves the technical problems that in the background technology, the accumulated water removing effect is poor during vacuumizing, the vacuumizing time is prolonged, water vapor easily corrodes an overflowing part of a mechanical vacuum pump, the emulsifying probability of lubricating oil is increased, and the maintenance cost is increased.
The technical solution of the invention is as follows: the utility model provides a combined type vacuum apparatus's tobacco leaf vacuum damping machine, includes refrigeration unit and the condensing tower structure of first pipeline intercommunication on the damping box, and condensing tower structure upper end intercommunication has the filter, and the filter intercommunication has the vapour catcher, and the vapour catcher is through one-level lobe pump, second grade lobe pump intercommunication on screw vacuum pump, is connected with first vacuum valve between second grade lobe pump and the screw vacuum pump, is connected with the second vacuum valve between second grade lobe pump export and the first-level lobe pump import, the vapour catcher comprises vapour catching casing and the vapour catching coil pipe in the vapour catching casing, the vapour catching coil pipe communicates and is supplied with the cold source by the refrigeration unit on the refrigeration unit, filter and one-level lobe pump intercommunication are in the vapour catching casing of vapour catcher.
Preferably, the lower part of the steam capture shell is communicated with a liquid storage tank through a first vacuum stop valve, and the side wall and the lower end of the liquid storage 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 heat exchange shell, the steam capturing coil is connected with a first circulating pump through an eighth vacuum stop valve, the first circulating pump is communicated in the heat exchange shell through a fourth vacuum stop valve, and the heat exchange shell is communicated on the steam capturing 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 with a heat exchange tube inlet of the gas-liquid heat exchanger, a heat exchange tube outlet of the gas-liquid heat exchanger is connected to an inlet of the evaporator through a thermal expansion valve, an outlet of the evaporator is connected to a shell inlet of the gas-liquid heat exchanger, and an outlet of a shell of the gas-liquid heat exchanger 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 invention has the beneficial effects that:
1. when the vacuum pump carries out the evacuation, the moisture that will take out in the box from the conditioning is earlier through condensing tower with most moisture condensation water, keeps in the vacuum water tank, and the moisture in the vapor process defroster, filter, the catch vapour ware that is not condensed gets rid of the air, then discharges in entering into the vacuum pump. At the moment, because the moisture in the air is removed, the load of the vacuum pump is greatly reduced, and the normal operation of the vacuum pump is ensured.
2. The refrigerating unit provides a cold source for the steam trap, so that moisture entering the steam trap is condensed and discharged.
3. In the refrigerating unit, the gas-liquid heat exchanger is additionally arranged, the medium-temperature high-pressure liquid from the dryer is used for heating the low-pressure low-temperature gas reflowed by the evaporator, so that the temperature of the gas output to the compressor by the evaporator is increased, the steam entering the compressor is changed into superheated steam, and the cylinder flushing of the compressor is avoided. Meanwhile, the energy of the medium-temperature and high-pressure liquid output from the dryer is utilized, and the energy is saved.
4. Moisture in the gas is removed through the condensation tower, the demister and the steam trap, so that the drying degree of the air is greatly ensured, and the normal operation of the vacuum pump is ensured.
5. The gas with the water vapor passes through the filter, so that solid matters in the gas are 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 first-stage roots pump 5, a second-stage roots pump 6, 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 storage tank 13, a second vacuum stop valve 14, a third vacuum stop valve 15, an evaporator 16, a heat exchange shell 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 gas-liquid heat exchanger 26, a thermal 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 invention is further explained with reference to the drawings.
In the invention, the condensing tower structure is that the lower part of a condensing tower shell 28 is connected to a vacuum water tank 31 through a third vacuum valve 29, the lower part of the vacuum water tank 31 is connected to a second circulating pump 33 through a first one-way valve 32, when a vacuum pump vacuumizes a moisture regain box body 2, the action of the first one-way valve 32 can ensure that the vacuum in the box body is not broken, the second circulating pump 33 is not opened during vacuumization, condensed water flowing out from the lower part of the condensing tower shell 28 flows into the vacuum water tank 31 at the moment, after vacuumization is stopped, the second circulating pump 33 is opened at the moment, the first one-way valve 32 is opened under the action of water pressure, water in the vacuum water tank 31 is pumped into a circulating water tank 38 through a water return pipeline 36 by the second circulating pump 33, the water return pipeline 36 is cooled by a cooling tower 37 before entering the circulating water tank 38, the circulating water tank 38 is ensured to be cooling water, and during vacuumization, 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 portion of the condensing tower, the spraying device cools steam entering from the moisture regaining box body 2, the steam in the steam is condensed into water drops and falls down, then the residual gas is demisted through a demister, solid impurities in the gas are filtered through a filter 3, the steam in the gas is further condensed through a steam catcher 4, moisture in the gas is further removed, and the gas is discharged through a vacuum pump.
The steam catcher 4 is equivalent to a tubular heat exchanger, an evaporator 16 of a refrigerating unit is arranged in a heat exchange shell 17 to cool a medium in the heat exchange shell 17, two ends of a steam catching coil 11 of the steam catcher 4 are respectively connected in the heat exchange shell 17, the medium circulates in the steam catching coil 11 and the heat exchange shell 17 through a first circulating pump 19 in the middle, the cooled medium is continuously brought into the steam catching coil 11, and the space in the steam catching shell 10 is refrigerated by the steam catching coil 11, so that moisture in gas passing through the steam catching shell 10 is cooled. In the process of vacuumizing, the first vacuum valve 8 on the upper part of the liquid storage tank 13 is closed and opened, the second vacuum stop valve 15 and the third vacuum stop valve 15 are closed, the vacuum state is kept at the moment, condensed water in the steam capture shell 10 flows into the liquid storage tank 13, when water needs to be drained, the first vacuum stop valve 12 on the upper part is closed, the vacuum degree on the upper part of the first vacuum stop valve 12 is ensured, the second vacuum stop valve 14 on the side end and the third vacuum stop valve 15 on the lower end are opened, the purpose of the second vacuum stop valve 14 on the side end is to break air and air, and the smooth drainage of the condensed water from the third vacuum stop valve 15 below is facilitated. The separator is an oil separator.
The first vacuum valve 8 connected between the two-stage roots pump 6 and the screw vacuum pump 7 has the function that the vacuum pump is closed after vacuum pumping is finished, the vacuum degree in the loop can be kept, energy conservation is facilitated, the vacuum valve can be removed, and the vacuum in the loop can be obtained by performing vacuum in the screw vacuum pump 7. And the second vacuum valve 9 connected between the inlet of the first-stage roots pump 5 and the outlet of the second-stage roots pump 6 can short-circuit the first-stage roots pump 5 and the second-stage roots pump 6, and directly uses the screw vacuum pump 7 to vacuumize the system loop.
When the vacuum pump is used, the moisture regain box body 2 is firstly vacuumized to 8kpa by the screw vacuum pump 7 (at the moment, the second vacuum valve 9 is opened, the first-stage roots pump 5 and the second-stage roots pump 6 are in short circuit), then the second vacuum valve 9 is closed, the second-stage roots pump 6 is opened, the vacuum degree is vacuumized to 2-3kpa, the first-stage roots pump 5 is opened, and the working vacuum degree is reached, namely 400-plus 1000 pa.
When the system is vacuumized for the first time, the vacuumizing action and sequence are used, air and accumulated condensed water are contained in the moisture regaining box body 2, 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 during vacuumizing. 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 circulating system of the condensation tower is not opened for the first time.
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 condensed into water in the cooling tower 37 after coming out of the box body and is stored in the vacuum water tank 31 temporarily, the water vapor which is not condensed passes through the demister 43, the filter 3 and the steam catcher 4 and then passes through the second vacuum valve 9 and the screw vacuum pump 7 to be discharged, at the moment, because the tobacco leaves are humidified, the primary vacuum pump and the secondary vacuum pump are not started again after secondary vacuumizing, and otherwise, the moisture of the tobacco leaves can be evaporated. 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 off excessive exhaust steam in the box body, the temperature of the tobacco leaves can be adjusted secondly, the temperature balance is guaranteed, then the tobacco leaves are broken empty, and the tobacco leaves are output.
The invention adopts a condensation and vacuum composite technology, and low-temperature low-pressure water vapor generated in the evacuation process is condensed into liquid through the vapor catcher 4, so that the working load of a vacuum pump is reduced, the installed power of a vacuum system is reduced, a mechanical vacuum pump set is protected from steam corrosion, and the evacuation time is shortened; 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.
The steam with the temperature lower than 33 ℃ is changed into low-temperature steam, and the steam with the temperature of 32-100 ℃ is called medium-temperature steam.
Claims (6)
1. The utility model provides a combined type vacuum apparatus's tobacco leaf vacuum damping machine, includes refrigerating unit and the condensing tower structure of intercommunication on damping box (2) through first pipeline (1), condensing tower structure upper end intercommunication has filter (3), and filter (3) intercommunication has vapour catcher (4), and vapour catcher (4) are through one-level roots pump (5), second grade roots pump (6) intercommunication on screw vacuum pump (7), are connected with first vacuum valve (8) between second grade roots pump (6) and screw vacuum pump (7), are connected with second vacuum valve (9) between second grade roots pump (6) export and one-level roots pump (5) import, vapour catcher (4) are caught vapour coil (11) by catching in vapour catcher casing (10) and the vapour catcher casing (10) and constitute, catch on the vapour coil (11) communicate refrigerating unit and supply the cold source by the refrigerating unit, filter (3) and one-level pump (5) intercommunication are in vapour catcher casing (10) of vapour catcher (4).
2. The tobacco leaf vacuum moisture regaining machine of the combined type vacuum device according to claim 1, characterized in that the lower part of the steam capturing shell (10) is communicated with a liquid storage tank (13) through a first vacuum stop valve (12), and the side wall and the lower end of the liquid storage tank (13) are respectively communicated with a second vacuum stop valve (14) and a third vacuum stop valve (15).
3. The tobacco leaf vacuum moisture regaining machine of the combined type vacuum device according to claim 1, characterized in that an evaporator (16) of the refrigerating unit is arranged in a heat exchange shell (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 heat exchange shell (17) through a fourth vacuum stop valve (20), and the heat exchange shell (17) is communicated on the steam capturing coil (11) through a fifth vacuum stop valve (21).
4. The tobacco leaf vacuum moisture regaining machine of the combined type 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 a heat exchange pipe inlet of a gas-liquid heat exchanger (26), a heat exchange pipe outlet of the gas-liquid heat exchanger (26) is connected with an inlet of an evaporator (16) through a thermal expansion valve (27), an outlet of the evaporator (16) is connected with a shell inlet of the gas-liquid heat exchanger (26), and an outlet of a shell of the gas-liquid heat exchanger (26) is connected with the compressor (22).
5. The tobacco leaf vacuum moisture regaining machine of the composite vacuum device according to claim 1, characterized in that 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), 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 a combined type vacuum device according to claim 5, wherein a demister (43) is installed in a condensing tower housing (28) at an upper portion of the spraying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111416704.3A CN113974197A (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of combined type vacuum apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111416704.3A CN113974197A (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of combined type vacuum apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113974197A true CN113974197A (en) | 2022-01-28 |
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ID=79731923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111416704.3A Pending CN113974197A (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of combined type vacuum apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113974197A (en) |
-
2021
- 2021-11-26 CN CN202111416704.3A patent/CN113974197A/en active Pending
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