CN112956721A - SJ133A charger steam compensation drainage system and working method thereof - Google Patents
SJ133A charger steam compensation drainage system and working method thereof Download PDFInfo
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- CN112956721A CN112956721A CN202110351385.6A CN202110351385A CN112956721A CN 112956721 A CN112956721 A CN 112956721A CN 202110351385 A CN202110351385 A CN 202110351385A CN 112956721 A CN112956721 A CN 112956721A
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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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- 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
- A24B3/12—Steaming, curing, or flavouring tobacco
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Abstract
The invention provides a SJ133A feeder steam compensation and drainage system which comprises a three-way pneumatic valve, a water collecting tank, a first filter, a drainage valve, a one-way valve and a ball valve, wherein a first port of the three-way pneumatic valve is connected with a steam-water separator of a SJ133A feeder, a second port of the three-way pneumatic valve is connected with a steam compensation pipeline of the SJ133A feeder, a third port of the three-way pneumatic valve is connected with an input port of the water collecting tank, an output port of the water collecting tank is connected with an input end of the first filter, an output end of the first filter is connected with an input end of the drainage valve, an output end of the drainage valve is connected with an input end of the one-way valve, an output end of the one-way valve is connected with an input end of the ball valve, and an output end of the ball valve is connected with a concentrated drainage system of the S. The invention does not change the overall process performance and the operation characteristics of the feeder, designs the steam compensation independent drainage system, and avoids the influence on the process moisture control caused by the residual condensed water in the injection pipeline section entering the tobacco leaf.
Description
Technical Field
The invention relates to the technical field of tobacco production, in particular to a SJ133A charger steam compensation drainage system and a working method thereof.
Background
The blade feeding section is one of key processes in the silk making process, and the SJ133A feeder is used as a main machine device of the blade feeding process and is used for continuously and uniformly heating, humidifying and feeding the blades after the moisture regaining of the blades, so that the sensory quality and the physical property of the blades are improved, and the requirements of the silk cutting process are met. And the SJ133A feeder is provided with a compensation steam system and is used for performing heat compensation on circulating hot air, so that the aim of quickly stabilizing the temperature of the material at the outlet is fulfilled. During production, if too much make-up steam is used, the leaf moisture will increase, affecting the stability of the process moisture control. Therefore, the dryness of the compensation steam is improved, and the method has important significance for the process improvement of the working section.
According to the process requirements, the feeder adopts a control mode of adding water quantitatively, fixing the frequency of a hot air circulating fan and the steam pressure of a heater, and stabilizing the moisture and the temperature of the material at the outlet by adjusting the opening of a pneumatic film valve and changing the adding amount of the injected steam. After the production is started, more condensate water is sprayed out when the steam of the compensation steam system is sprayed for the first time. And continuously testing 10 batches of cigarettes on site, and obtaining the time T for draining the condensed water by using a steam injection pipe with the pipe diameter of DN50 under the working pressure of 0.4MPa after the production starts. The statistical results are shown in table 1.
TABLE 1 Compensation steam injection pipe condensate drainage time (unit: second)
The test result shows that the average time for draining the condensed water is 8.4 seconds under the working pressure of 0.4MPa by the steam spraying pipe with the pipe diameter of DN 50. During the period, the discharged water is directly mixed into the tobacco leaves, so that the water content of the stub of the tobacco leaves in the batch is abnormally fluctuated.
The reason why the above problems occur is that:
firstly, the drainage of the drainage system of the feeder is not smooth
The pipeline that the feeder was carried from heating power station to steam is longer, and the comdenstion water that the steam of main line contained when the first feeder that gets into of every day is more, and the feeder has set up the supporting drain line of catch water and has carried out steam-water separation for this reason specially, reaches the purpose that promotes the steam quality. In order to achieve the best use effect and avoid the drainage hysteresis of the drainage system, the condensed water on the steam pipeline is manually discharged in advance before the production is started (straight drainage). Namely, the condensed water bypass valve is opened to directly discharge the steam for 10min and then the steam is closed. The test results show that the condensate water injection phenomenon is not improved when the compensating steam pipeline starts to produce.
Second, compensate for steam system injection pipeline design factors
Under the effect of pressure and torrent factor when main line steam first gets into equipment, the comdenstion water that remains after getting into each pipeline valve member fast and shutting down accumulates, because independent drainage system is not established to compensation steam pipe-line system, when equipment opened, the comdenstion water in relief pressure valve and the pneumatic membrane governing valve linkage segment pipeline valve member is followed steam and is directly jetted out, in DN50 long accumulation pipeline section about 800mm, the comdenstion water injection quantity is about:
Lwater (W)＝πr2xhxρ＝3.14x0.0252x0.8x1000＝1.57kg
Namely, due to the design factor of the compensation steam pipeline, condensed water is remained on the section of the injection pipeline and cannot be discharged through the original drainage system.
The Chinese patent with publication number CN208144398U, published as 2018, 11 and 27, discloses an automatic condensed water discharge system for a feeder pipeline, which comprises a pipeline drainage system, wherein the pipeline drainage system comprises a first pneumatic ball valve arranged at a steam inlet, a heat exchanger and a drainage pipeline connected with a condensed water outlet, and the heat exchanger is arranged between the pneumatic ball valve and a water pipeline; the drainage pipeline consists of a bypass pipeline and a drainage branch which are arranged in parallel; and the bypass pipeline is provided with a temperature sensor and a second pneumatic ball valve, and the second pneumatic ball valve is arranged on a downstream pipeline of the temperature sensor. This automatic system of getting rid of feeder pipeline comdenstion water through add the bypass pipeline in the drain line, add pneumatic ball valve and temperature sensor, realize discharging the comdenstion water in the pipeline fast in the stage of preheating to self-closing second pneumatic ball valve after the comdenstion water is discharged completely, bypass pipeline work is over. This patent still can't quick drain comdenstion water.
Disclosure of Invention
The invention mainly aims to provide a compensation steam drainage system of an SJ133A charger, which realizes quick drainage of condensed water.
It is a further object of the present invention to provide a method of operating a SJ133A charger compensating steam trap system.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a SJ133A feeder compensation steam drainage system, includes three-way pneumatic valve, water catch bowl, first filter, trap, check valve and ball valve, wherein:
the three-way pneumatic valve is characterized in that a first port of the three-way pneumatic valve is connected with a steam-water separator of an SJ133A feeding machine, steam in the SJ133A feeding machine enters the three-way pneumatic valve from the steam-water separator, a second port of the three-way pneumatic valve is connected with a compensation steam pipeline of the SJ133A feeding machine, a third port of the three-way pneumatic valve is connected with an input port of a water collecting tank, an output port of the water collecting tank is connected with an input end of a first filter, an output end of the first filter is connected with an input end of a drain valve, an output end of the drain valve is connected with an input end of a one-way valve, an output end of the one-way valve is connected with an input end of a ball valve, and an output end of the ball valve is connected with a centralized.
Preferably, the three-way pneumatic valve consists of a piston type pneumatic actuator, a main shaft, a valve rod and a valve, and the working principle of the three-way pneumatic valve is as follows:
air is compressed and introduced into a central cavity of the valve to push the piston type pneumatic actuator to act, the piston type pneumatic actuator and the main shaft are provided with a guide rail and a gear to drive the main shaft to rotate, and the main shaft and the valve rod are installed together to drive the valve to open or close.
Preferably, the piston type pneumatic actuator is reset by a spring, the spring is compressed when the gas enters, the steam injection of the drainage passage is stopped when the valve is in a valve state, and vice versa when the gas is closed or fails, so that the normal working condition is ensured.
Preferably, the spring return output torque in the piston type pneumatic actuator needs to meet the working torque of a ball valve:
M＝Mm+Mt+Mu
wherein M is the torque of the three-way pneumatic valvemFriction torque, M of ball and valve seat sealing ring in three-way pneumatic valvetIs the friction torque of sealing filler in the three-way pneumatic valve MuFriction of thrust washers in the three-way pneumatic valve.
Preferably, the maximum working pressure of the one-way valve is at least 1.5 times of the maximum working pressure of the steam in the SJ133A charger.
Preferably, the one-way valve is of type H71W.
Preferably, the first filter is a Y-filter.
Preferably, the steam in the SJ133A feeder is sequentially input to a steam-water separator through a gate valve and a second filter, and the output end of the steam-water separator is sequentially input to the three-way pneumatic valve through a pressure reducing valve and a membrane valve.
A method of operating a SJ133A charger compensated steam trap system as described above, comprising the steps of:
s1: the PLC is adopted for control, and the application of the first batch of material head part is completed within 2min every day;
s2: when the power-on signal is detected, jumping to S3;
s3: when the electronic scale detects that the flow of the residual condensed water is more than 10Kg/h and the cumulant of the electronic scale is more than 5Kg, the step goes to S4;
s4: opening the film valve by 80%, starting to blow the condensed water in the pipeline, continuously blowing for 50S, and then jumping to S5;
s5: closing the injection film valve, stopping blowing, and jumping to S6 after 10S;
s6: starting the second blowing, opening the film valve by 80% of opening degree, continuing for 50S, and jumping to S7;
s7: closing the membrane valve, and switching the three-way pneumatic valve to a steam injection passage to enable steam to be sprayed out from the third port;
s8: the number of steps of the execution program is reset, the power-on signal is detected again the next day, and the steps S1 to S7 are automatically executed.
Preferably, when the three-way pneumatic valve is detected to be incapable of detecting the closing within 3 minutes continuously, the alarm bell and the operation display screen are used for prompting.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention designs the compensation steam independent drainage system without changing the overall process performance and the operation characteristics of the feeder, and avoids the influence on the process moisture control caused by the residual condensed water in the injection pipeline section entering the tobacco leaf. Through consulting feeder heat exchanger pipe-line system, set up a set of hydrophobic pipeline and main steam return water pipe connection on steam injection device, both can retrieve the comdenstion water and can improve injection steam quality again, the not harmful effects that have that the use factor can be foreseeable.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
FIG. 2 is a flow chart of the working method of the present invention.
In the figure, 1 is a gate valve, 2 is a second filter, 3 is a steam-water separator, 4 is a pressure reducing valve, 5 is a membrane valve, 6 is a three-way pneumatic valve, 7 is a water collecting tank, 8 is a compensation steam pipeline, 9 is a first filter, 10 is a drain valve, 11 is a one-way valve, 13 is a ball valve, and 14 is a centralized drainage system.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The invention provides a SJ133A charger steam compensation drainage system, which comprises a three-way pneumatic valve 6, a water collecting tank 7, a first filter 9, a drainage valve 10, a one-way valve 11 and a ball valve 13, wherein:
the three-way pneumatic valve 6 is characterized in that a first port is connected with a steam-water separator 3 of an SJ133A feeder, steam in the SJ133A feeder enters the three-way pneumatic valve 6 from the steam-water separator 3, a second port of the three-way pneumatic valve 6 is connected with a compensation steam pipeline 8 of the SJ133A feeder, a third port of the three-way pneumatic valve 6 is connected with an input port of a water collecting tank 7, an output port of the water collecting tank 7 is connected with an input end of a first filter 9, an output end of the first filter 9 is connected with an input end of a drain valve 10, an output end of the drain valve 10 is connected with an input end of a one-way valve 11, an output end of the one-way valve 11 is connected with an input end of a ball valve 13, and an output end of the ball valve 13 is connected with a centralized drain system 14 of the SJ133A feeder.
The drainage time node is selected at the beginning stage of production, so that the secondary condensation of the sprayed steam caused by long-time waiting after the pipeline is drained can be avoided. According to the system control setting, when the production state is switched to, the inlet electronic belt scale starts to measure for 2min, the outlet temperature detection signal feedback system participates in control, at the moment, the sprayed steam is in a state of being opened at any time, namely, the condensed water needs to be emptied within 2min after measurement and the state conversion is completed, and the drainage mode is determined according to the time requirement.
Hydrophobic pattern determination
The pipeline drainage has a direct discharge type and a condensation discharge type, and the comparative analysis is as follows:
(1) in-line. The residual condensed water needs 8.4S to finish spraying and draining in a DN50 pipe, after a return pipe with a DN15 caliber is connected, empirical calculation is carried out according to the pipe diameter section reduction multiple and the factor of bringing back pressure into, spraying and draining can be finished within about 30S under the pressure of 0.4MPa, and the design and installation of the pipeline are simple and convenient, and the cost is low. The disadvantage is that the flow speed of the steam carrying the condensed water into the return pipeline is about 25-30m/s in the direct discharging process, and the condensed water has high density and is incompressible, so that the condensed water has considerable momentum when moving at high speed, and the formed water hammer has large impact on the accessories of the return pipeline.
(2) And (4) a condensation discharge type. The condensing discharge type pipeline mainly comprises a drain valve 10 and the like, wherein a floating ball type drain valve 10 of DN15 is considered and selected, and the drainage capacity of the condensing discharge type pipeline is determined by differential pressure calculation:
△P＝(P1-P2) (1)
in the formula: p1 is the inlet pressure of the trap 10, Mpa;
p2 is the outlet pressure of the trap 10, Mpa;
delta P is the maximum pressure difference, MPa, of the inlet and outlet of the trap 10.
P2＝H+hf＝0.05+0.01＝0.06Mpa (2)
In the formula: h is the height resistance of the condensed water after the drain valve 10 is closed;
hfthe post-valve system resistance of the trap 10.
The P1 is known to be 0.4MPa, the formula (2) is substituted into the formula (1), namely the pressure difference delta P of the inlet and the outlet of the trap 10 is 0.36MPa, and the drainage quantity under the pressure difference is 300kg/h, namely 5kg/min by referring to a discharge capacity comparison table of the trap 10. According to the previous analysis, 1.57kg of condensed water needs to be discharged within 2min, the drainage capacity of the trap 10 needs to be about 2.4kg/min according to the selection of 3 times of the amount of the condensed water, namely the DN15 trap 10 can meet the time requirement of discharging the condensed water of the injection pipeline, and meanwhile, the steam-blocking drainage performance of the trap 10 has a better protection effect on a downstream pipeline, so the drainage mode is selected as a condensation discharge mode.
According to analysis, condensed water is mainly accumulated at the connecting section of the pressure reducing valve 4 and the pneumatic membrane regulating valve, a port is arranged at the lowest point of the injection pipe behind the outlet of the pneumatic membrane regulating valve to form a three-way pipeline, one pipeline is an injection pipeline, and the other pipeline is drained and is controlled to be reversed by a pneumatic ball valve 13. Considering that the control valve is opened instantly and water hammer is large when water is drained, a water collecting tank 7 is arranged at the front end of a drain valve 10 group for buffering and diversion, and referring to a steam engineering guide, see table 2, the design specification is DN50X150 MM.
TABLE 2 Water catch bowl 7 size table
| Diameter of main pipe | Diameter d | 1 of water collection tank 7 | |
| ≤ | d | 1＝D | At least d 2-100 mm |
| 125～ | d | 1＝100mm | At least d 2-150 mm |
| ≥ | d | 1≥D/2 | At least D2 ═ D |
The three-way pneumatic valve 6 is composed of a piston type pneumatic actuator, a main shaft, a valve rod and a valve, and the working principle of the three-way pneumatic valve 6 is as follows:
air is compressed and introduced into a central cavity of the valve to push the piston type pneumatic actuator to act, the piston type pneumatic actuator and the main shaft are provided with a guide rail and a gear to drive the main shaft to rotate, and the main shaft and the valve rod are installed together to drive the valve to open or close.
The piston type pneumatic actuator is reset by a spring, the spring is compressed when the gas enters, the steam injection of the drainage passage is stopped when the valve is in a valve state, and vice versa when the gas is closed or fails, so that the normal working condition is ensured.
The spring reset output torque in the piston type pneumatic actuator needs to meet the working torque of the ball valve 13:
M＝Mm+Mt+Mu
wherein M is the torque of the three-way pneumatic valve 6, MmFriction torque, M of ball and valve seat sealing ring in three-way pneumatic valve 6tIs the friction torque of the sealing filler in the three-way pneumatic valve 6, MuFriction of thrust washers in the three-way pneumatic valve 6.
The maximum working pressure of the check valve 11 is at least 1.5 times of the maximum working pressure of the steam in the SJ133A charger.
The check valve 11 is H71W.
The first filter 9 is a Y-filter.
Steam in the SJ133A feeder is sequentially input into the steam-water separator 3 through the gate valve 1 and the second filter 2, and the output end of the steam-water separator 3 is sequentially input into the three-way pneumatic valve 6 through the pressure reducing valve 4 and the membrane valve 5.
Example 2
This example provides a method of operating a SJ133A charger compensated steam trap system as described in example 1, and as shown in figure 2, comprising the steps of:
s1: the PLC is adopted for control, and the application of the first batch of material head part is completed within 2min every day;
s2: when the power-on signal is detected, jumping to S3;
s3: when the electronic scale detects that the flow of the residual condensed water is more than 10Kg/h and the cumulant of the electronic scale is more than 5Kg, the step goes to S4;
s4: opening the 580% opening degree of the membrane valve, starting to blow the condensed water in the pipeline, continuously blowing for 50S, and then jumping to S5;
s5: closing the injection film valve 5, stopping blowing, and jumping to S6 after 10S;
s6: starting the second blowing, opening the film valve by 580 percent of opening, continuing for 50S, and jumping to S7;
s7: closing the membrane valve 5, and switching the three-way pneumatic valve 6 to a steam injection passage to spray steam from a third port;
s8: the number of steps of the execution program is reset, the power-on signal is detected again the next day, and the steps S1 to S7 are automatically executed.
If the three-way pneumatic valve 6 is not closed for a long time or cannot be closed in place after being opened in the normal production process, the control of a charging temperature loop can be influenced, the temperature cannot meet the technological requirements, and a corresponding alarm prompt is made in the program, namely when the three-way pneumatic valve 6 is detected to be incapable of being detected to be closed for 3 continuous minutes, the alarm bell is used for prompting in an operation display screen picture.
After the steam injection pipeline is improved, the initial steam injection conditions of 5 first secondary production processes are tracked respectively, the injected steam is saturated and dry, and the moisture of the outlet material is stable in the corresponding time after injection. In the using process, the pneumatic ball valve 13 group is sensitive in response, has no delay clamping stagnation phenomenon, and the drainage pipeline works stably, so that the normal operation of the system is ensured.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a SJ133A feeder compensation steam drainage system which characterized in that, includes three-way pneumatic valve, water catch bowl, first filter, trap, check valve and ball valve, wherein:
the three-way pneumatic valve is characterized in that a first port of the three-way pneumatic valve is connected with a steam-water separator of an SJ133A feeding machine, steam in the SJ133A feeding machine enters the three-way pneumatic valve from the steam-water separator, a second port of the three-way pneumatic valve is connected with a compensation steam pipeline of the SJ133A feeding machine, a third port of the three-way pneumatic valve is connected with an input port of a water collecting tank, an output port of the water collecting tank is connected with an input end of a first filter, an output end of the first filter is connected with an input end of a drain valve, an output end of the drain valve is connected with an input end of a one-way valve, an output end of the one-way valve is connected with an input end of a ball valve, and an output end of the ball valve is connected with a centralized.
2. The SJ133A charger steam compensation drainage system as claimed in claim 1, wherein the three-way pneumatic valve is composed of a piston type pneumatic actuator, a spindle, a valve rod and a valve, and the working principle of the three-way pneumatic valve is as follows:
air is compressed and introduced into a central cavity of the valve to push the piston type pneumatic actuator to act, the piston type pneumatic actuator and the main shaft are provided with a guide rail and a gear to drive the main shaft to rotate, and the main shaft and the valve rod are installed together to drive the valve to open or close.
3. The SJ133A charger compensating steam trap system of claim 2, wherein the piston-type pneumatic actuator is spring-biased, and is compressed when gas is introduced, and the valve is closed when the trap path steam injection is stopped, and vice versa when gas is closed or fails to ensure normal operation.
4. The SJ133A charger compensating steam trap system of claim 3, wherein the spring return output torque of the piston-type pneumatic actuator is required to meet the ball valve operating torque:
M＝Mm+Mt+Mu
wherein M is the torque of the three-way pneumatic valvemFriction torque, M of ball and valve seat sealing ring in three-way pneumatic valvetIs the friction torque of sealing filler in the three-way pneumatic valve MuFriction of thrust washers in the three-way pneumatic valve.
5. The SJ133A charger compensating steam trap system of claim 4, wherein the one-way valve maximum service pressure is at least 1.5 times the maximum service pressure of the steam in the SJ133A charger.
6. The SJ133A charger compensating steam trap system of claim 5, wherein the check valve is model H71W.
7. The SJ133A charger compensating steam hydrophobic system of claim 6, wherein the first filter is a Y-filter.
8. The SJ133A charger compensated steam trap system of claim 7, wherein the steam from the SJ133A charger is sequentially fed through a gate valve and a second filter to a steam-water separator, and the output of the steam-water separator is sequentially fed through a pressure reducing valve and a membrane valve to the three-way pneumatic valve.
9. A method of operating a SJ133A charger compensating steam trap system as claimed in any one of claims 1 to 8, comprising the steps of:
s1: the PLC is adopted for control, and the application of the first batch of material head part is completed within 2min every day;
s2: when the power-on signal is detected, jumping to S3;
s3: when the electronic scale detects that the flow of the residual condensed water is more than 10Kg/h and the cumulant of the electronic scale is more than 5Kg, the step goes to S4;
s4: opening the film valve by 80%, starting to blow the condensed water in the pipeline, continuously blowing for 50S, and then jumping to S5;
s5: closing the injection film valve, stopping blowing, and jumping to S6 after 10S;
s6: starting the second blowing, opening the film valve by 80% of opening degree, continuing for 50S, and jumping to S7;
s7: closing the membrane valve, and switching the three-way pneumatic valve to a steam injection passage to enable steam to be sprayed out from the third port;
s8: the number of steps of the execution program is reset, the power-on signal is detected again the next day, and the steps S1 to S7 are automatically executed.
10. The operation method as SJ133A feeder compensated steam trap system as recited in claim 9, wherein the alarm bell and the operation display screen indicate when the three-way pneumatic valve fails to detect a shut-off for 3 consecutive minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114052282A (en) * | 2021-11-23 | 2022-02-18 | 山东中烟工业有限责任公司 | Dryer heat exchange device for cigar pretreatment and working method thereof |
| CN115606832A (en) * | 2022-10-28 | 2023-01-17 | 广东中烟工业有限责任公司 | Method for stably controlling moisture content of cut stem feeder outlet |
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