CN216245639U - Tobacco vacuum moisture regaining machine of multi-stage indirect condensation type composite vacuum device - Google Patents
Tobacco vacuum moisture regaining machine of multi-stage indirect condensation type composite vacuum device Download PDFInfo
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- CN216245639U CN216245639U CN202122921077.0U CN202122921077U CN216245639U CN 216245639 U CN216245639 U CN 216245639U CN 202122921077 U CN202122921077 U CN 202122921077U CN 216245639 U CN216245639 U CN 216245639U
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Abstract
The utility model provides a tobacco vacuum moisture regaining machine of a multi-stage indirect condensation type composite vacuum device, which effectively solves the technical problems that in the background art, 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. 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. The condensing tower adopts tubular pipe heat, and a cold source is provided by a refrigerating unit. The condenser of the refrigerating unit adopts the water cooler, so that the cooling effect is better.
Description
Technical Field
The utility model relates to the tobacco industry, in particular to a tobacco vacuum moisture regaining machine of a multi-stage indirect condensation type 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 a multi-stage indirect condensation type composite vacuum device, which is used for condensing water vapor discharged from a vacuum box through a multi-stage unmixed mode, so that the technical problems that in the background art, the accumulated water removing effect is poor during vacuumizing, the vacuumizing time is prolonged, the overflowing part of a mechanical vacuum pump is easily corroded by the water vapor, the emulsifying probability of lubricating oil is increased, and the maintenance cost is increased are effectively solved.
The technical solution of the utility model is as follows: a tobacco vacuum moisture regaining machine of a multi-stage indirect condensation type 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 trap, the steam trap 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 the first vacuum valve, 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 communicated with the refrigerating unit and is supplied with a cold source by the refrigerating unit, and the filter and the roots pump are communicated in the steam trap shell of the steam trap;
an evaporator of the refrigerating unit is arranged in a heat exchange shell, the steam capture coil is connected with a first circulating pump through a first vacuum stop valve, the first circulating pump is connected in the heat exchange shell through a second vacuum stop valve, and the other end of the heat exchange shell is connected to the other end of the steam capture coil through a third vacuum stop valve;
the condensation tower structure comprises a condensation tower shell, the moisture regaining box body is connected to the condensation tower shell through a first pipeline, the upper end of the condensation tower shell is communicated with a filter, a sixth vacuum valve is arranged on the first pipeline, and the lower end of the condensation tower shell is connected with a vacuum water tank through a third vacuum valve;
and a liquid outlet of the first circulating pump is communicated in a condensing tower coil arranged in a condensing tower shell through a fourth vacuum stop valve and a fourth vacuum valve, and the other end of the condensing tower coil is communicated in a heat exchange shell.
Preferably, vacuum tank is connected with the second circulating pump through first check valve, the second circulating pump is connected with the second check valve through fifth vacuum stop valve, the second check valve is connected with the return water pipeline, the return water pipeline passes through the cooling tower intercommunication in circulating water tank, circulating water tank lower extreme intercommunication has sixth vacuum stop valve, the circulating water tank lower part is through working shaft, fifth vacuum valve, third check valve intercommunication on refrigerating unit's condenser coil pipe, refrigerating unit's condenser comprises condenser casing and the condenser coil pipe of arranging condenser casing in, condenser coil pipe's other end intercommunication is on the return water pipeline of cooling tower outside.
Preferably, the refrigerating unit comprises a compressor, the compressor is connected with a separator, the separator is connected with a condenser shell, the condenser shell 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 lower end of the steam catcher shell is connected to the condensing tower shell through a seventh vacuum stop valve.
Preferably, the top end of the shell of the condensing tower is provided with a demister arranged above the pipe of the condensing tower tray.
The utility model 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. The condensing tower adopts tubular heat exchange, and a cold source is provided by a refrigerating unit.
2. The refrigerating unit provides a cold source for the steam trap, so that moisture entering the steam trap is condensed and discharged.
3. 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.
4. 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.
5. The condenser of the refrigerating unit adopts the water cooler, so that the cooling effect is better.
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 second vacuum valve 6, a first vacuum valve 7, a screw vacuum pump 8, a steam trap casing 9, a steam trap coil 10, an evaporator 11, a heat exchange shell 12, a first vacuum cut-off valve 13, a first circulating pump 14, a second vacuum cut-off valve 15, a third vacuum cut-off valve 16, a condensing tower casing 17, a sixth vacuum valve 18, a third vacuum valve 19, a vacuum water tank 20, a fourth vacuum cut-off valve 21, a fourth vacuum valve 22, a condensing tower coil 23, a first check valve 24, a second circulating pump 25, a fifth vacuum cut-off valve 26, a second check valve 27, a return water pipeline 28, a closed cooling tower 29, a circulating water tank 30, a sixth vacuum cut-off valve 31, a water supply pump 32, a fifth vacuum valve 33, a third check valve 34, a condenser coil 35, a condenser casing 36, a compressor 37, a separator 38, a dryer 39, a thermostatic expansion valve 40, a seventh vacuum stop valve 41 and a demister 42.
Detailed Description
The utility model is further explained with the attached drawings.
In the utility model, the condensing tower structure is that the lower part of a condensing tower shell 17 is connected to a vacuum water tank 20 through a third vacuum valve 19, the lower part of the vacuum water tank 20 is connected to a second circulating pump 25 through a first one-way valve 24, when a vacuum pump vacuumizes a moisture regain box body 2, the effect of the first one-way valve 24 can ensure that the vacuum in the box body is not broken, the second circulating pump 25 is not opened during vacuumization, condensed water flowing out from the lower part of the condensing tower shell 17 flows into the vacuum water tank 20 at the moment, after vacuumization is stopped, the second circulating pump 25 is opened at the moment, the first one-way valve 24 is opened under the effect of water pressure, water in the vacuum water tank 20 is pumped into a circulating water tank 30 through a water return pipeline 28 by the second circulating pump 25, the water return pipeline 28 is cooled through a closed cooling tower 29 before entering the circulating water tank 30, and the circulating water tank 30 is ensured to be cooling water, in the process of vacuumizing, the water supply pump 32 is started, so that cooling water in the circulating water tank 30 enters a condenser coil 35 of the refrigerating unit, the condensing medium of the refrigerating unit passing through a condenser shell 36 is cooled, a condensing tower coil 23 is installed in a condensing tower shell 17 of the water supply pump, the condensing tower coil 23 provides a cold source through an evaporator 11 of the refrigerating unit, the condensing tower coil 23 condenses steam entering the condensing tower shell 17, the steam in the condensing tower is condensed into water drops, then the residual gas is demisted through a demister 42, solid impurities in the residual gas are filtered through a filter 3, the steam in the residual gas is further condensed through a steam trap 4, moisture in the gas is further removed, and the residual gas is discharged through a vacuum pump. When the condensed water in the shell of the steam catcher 4 needs to be discharged, the condensed water in the shell of the steam catcher 4 can be discharged into the condensing tower shell 17 only by opening the seventh vacuum stop valve 41.
The steam catcher 4 is equivalent to a tubular heat exchanger, an evaporator 11 of a refrigerating unit is arranged in a heat exchange shell 12 to cool a medium in the heat exchange shell 12, two ends of a steam catching coil 10 of the steam catcher 4 are respectively connected in the heat exchange shell 12, the medium circulates in the steam catching coil 10 and the heat exchange shell 12 through a first circulating pump 14 in the middle, the cooled medium is continuously brought into the steam catching coil 10, and the space in the steam catching shell 9 is refrigerated by the steam catching coil 10, so that moisture in gas passing through the steam catching shell 9 is cooled. If the fourth vacuum stop valve 21 and the fourth vacuum valve 22 are opened, the first circulation pump 14 can be enabled to simultaneously supply the cold source to the condensing tower coil 23, so that the condensing tower coil 23 can condense the water vapor entering into the condensing tower shell 17. The separator 38 is an oil separator 38.
The first vacuum valve 7 connected between the roots pump 5 and the screw vacuum pump 8 has the function that the vacuum pump is closed after vacuum pumping is finished, the vacuum degree in a loop can be kept, energy conservation is facilitated, a secondary vacuum valve can be removed, and the vacuum in the loop can be obtained through the screw vacuum pump 8. And the roots pump 5 and the second vacuum valve 6 are connected in parallel, so that the roots pump 5 can be short-circuited after the second vacuum valve 6 is opened, and the system loop is directly vacuumized by using the screw vacuum pump 8.
When the utility model is used, the moisture regaining box body 2 is firstly vacuumized to 8kpa by the screw vacuum pump 8 (at the moment, the second vacuum valve 6 is opened, and the roots pump 5 is in short circuit), then the second vacuum valve 6 is closed, the roots pump 5 is opened, and the vacuum degree is vacuumized to reach the working vacuum degree, for example, the working vacuum degree can be 400-.
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 42, 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 29 after coming out of the box body and is stored in the vacuum water tank 20 temporarily, the water vapor which is not condensed passes through the demister 42, the filter 3 and the steam catcher 4 and then is discharged through the second vacuum valve 6 and the screw vacuum pump 8, at the moment, as the tobacco leaves are humidified, the Roots vacuum pump is not started again in the 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 utility model 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 (5)
1. A tobacco vacuum moisture regaining machine of a multi-stage indirect condensation type 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), the filter (3) is communicated with a steam catcher (4), the steam catcher (4) is connected with a roots pump (5) and a second vacuum valve (6) which are connected in parallel, the outlets of the roots pump (5) and the second vacuum valve (6) are connected in parallel on the first vacuum valve (7), the first vacuum valve (7) is connected to a screw vacuum pump (8), the steam trap (4) is composed of a steam trap shell (9) and a steam trap coil (10) in the steam trap shell (9), the steam trap coil (10) is communicated with a refrigerating unit and is supplied with a cold source by the refrigerating unit, and the filter (3) and the roots pump (5) are communicated in a steam trap shell (9) of the steam trap (4);
an evaporator (11) of the refrigerating unit is arranged in a heat exchange shell (12), the steam capture coil (10) is connected with a first circulating pump (14) through a first vacuum stop valve (13), the first circulating pump (14) is connected in the heat exchange shell (12) through a second vacuum stop valve (15), and the other end of the heat exchange shell (12) is connected to the other end of the coil of the steam capture device (4) through a third vacuum stop valve (16);
the condensation tower structure comprises a condensation tower shell (17), the moisture regaining box body (2) is connected to the condensation tower shell (17) through a first pipeline (1), the upper end of the condensation tower shell (17) is communicated with the filter (3), a sixth vacuum valve (18) is arranged on the first pipeline (1), and the lower end of the condensation tower shell (17) is connected with a vacuum water tank (20) through a third vacuum valve (19);
the liquid outlet of the first circulating pump (14) is communicated in a condensing tower coil (23) arranged in the condensing tower shell (17) through a fourth vacuum stop valve (21) and a fourth vacuum valve (22), and the other end of the condensing tower coil (23) is communicated in the heat exchange shell (12).
2. The tobacco vacuum moisture regaining machine of the multi-stage indirect condensing type composite vacuum device according to claim 1, wherein the vacuum water tank (20) is connected with a second circulating pump (25) through a first one-way valve (24), the second circulating pump (25) is connected with a second one-way valve (27) through a fifth vacuum stop valve (26), the second one-way valve (27) is connected with a water return pipe (28), the water return pipe (28) is communicated in the circulating water tank (30) through a cooling tower (29), the lower end of the circulating water tank (30) is communicated with a sixth vacuum stop valve (31), the lower part of the circulating water tank (30) is communicated on a condenser coil (35) of a refrigerating unit through a water supply pump (32), a fifth vacuum valve (33) and a third one-way valve (34), the condenser of the refrigerating unit is composed of a condenser shell (36) and a condenser coil (35) arranged in the condenser shell (36), the other end of the condenser coil (35) is communicated with a water return pipeline (28) outside the closed cooling tower (29).
3. The tobacco vacuum moisture regaining machine of the multi-stage indirect condensing composite vacuum device according to claim 2, wherein the refrigerating unit comprises a compressor (37), the compressor (37) is connected with a separator (38), the separator (38) is connected with a condenser housing (36), the condenser housing (36) is connected with a dryer (39), the dryer (39) is connected with an inlet of the evaporator (11) through a thermal expansion valve (40), and an outlet of the evaporator (11) is connected with the compressor (37).
4. The tobacco vacuum moisture regaining machine of the multi-stage indirect condensing type composite vacuum device according to claim 2, characterized in that the lower end of the shell of the steam catcher (4) is connected to the condensation tower shell (17) through a seventh vacuum stop valve (41).
5. The tobacco vacuum moisture regaining machine of the multi-stage indirect condensing type composite vacuum device according to claim 1, characterized in that the top end of the condensing tower shell (17) is provided with a demister (42) which is arranged above the condensing tower coil (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122921077.0U CN216245639U (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of multi-stage indirect condensation type composite vacuum device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122921077.0U CN216245639U (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of multi-stage indirect condensation type composite vacuum device |
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| Publication Number | Publication Date |
|---|---|
| CN216245639U true CN216245639U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122921077.0U Active CN216245639U (en) | 2021-11-26 | 2021-11-26 | Tobacco vacuum moisture regaining machine of multi-stage indirect condensation type composite vacuum device |
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| Country | Link |
|---|---|
| CN (1) | CN216245639U (en) |
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2021
- 2021-11-26 CN CN202122921077.0U patent/CN216245639U/en active Active
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