CN108534282B - Double-channel air exhaust device and air exhaust method - Google Patents
Double-channel air exhaust device and air exhaust method Download PDFInfo
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- CN108534282B CN108534282B CN201810202862.0A CN201810202862A CN108534282B CN 108534282 B CN108534282 B CN 108534282B CN 201810202862 A CN201810202862 A CN 201810202862A CN 108534282 B CN108534282 B CN 108534282B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
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Abstract
The invention provides a double-channel air exhaust device and an air exhaust method, wherein the air exhaust device comprises: the device comprises a collecting cover, a sewage discharge branch air pipe, a heat discharge branch air pipe, two electric air valves, a time control switch timer and an air valve controller. The air exhaust method comprises the following steps: when the pollution source begins to discharge waste gas, the blowdown branch air pipe is opened, the time control switch timer begins to time, and the air valve controller enables the electric air valve of the heat discharge branch air pipe to close the heat discharge branch air pipe. After the timing is finished, the air valve controller enables the electric air valve of the blowdown branch air pipe to close the blowdown branch air pipe, and enables the electric air valve of the heat exhaust branch air pipe to open the heat exhaust branch air pipe. The invention realizes the independent collection of waste heat and waste gas by arranging the double-air-duct exhaust device for independently collecting the waste heat and the waste gas, greatly reduces the air volume of the system, ensures that pollutants can enter the purifying equipment at a higher concentration level, reduces the size of the equipment, reduces the initial investment, improves the purifying efficiency of the equipment, reduces the operating cost and realizes the purposes of energy conservation and high efficiency.
Description
Technical Field
The invention belongs to the technical field of ventilation, and relates to a double-channel air exhaust device and an air exhaust method.
Background
In order to collect pollutants such as waste gas generated in the industrial production process, the pollutants are often collected and treated by a ventilation system and finally discharged after reaching standards. In order to meet the energy-saving requirement, a low-air-volume and high-concentration waste gas collecting system is realized as far as possible so as to provide favorable conditions for subsequent pollution treatment. However, research shows that in the industrial production process, a single pollution source is stably and continuously emitted under few scenes, and most pollution sources are intermittently emitted by a plurality of pollution sources. In addition, a significant amount of waste heat is continuously generated at the source of pollution. If the waste heat is not discharged in time, the environment of the workshop is adversely affected. The ventilation system of the plant is designed not only to meet the requirement of collecting the exhaust gas, but also to take away a large amount of waste heat.
In order to meet the ventilation requirement of heat removal and pollution discharge, industrial enterprises in China generally adopt a mode of continuously inducing wind with large wind quantity to collect and discharge. Therefore, the exhaust air quantity of the ventilation system is huge, the collection concentration of pollutants is very low, and the consequences of the high energy consumption of the fan, the high initial investment of the purification equipment, the low operation efficiency and the high operation cost are brought, so that a plurality of enterprises can bear a burden.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a double-channel exhaust device which can improve the concentration of waste gas collection pollutants on the premise of reducing the energy consumption of a fan.
Another object of the present invention is to provide a double passage exhaust method for the above double passage exhaust device.
In order to achieve the above purpose, the solution of the invention is as follows:
a dual path exhaust device, comprising: the device comprises a collecting cover, a blowdown branch air pipe, an electric air valve of the blowdown branch air pipe, a heat extraction branch air pipe, an electric air valve of the heat extraction branch air pipe, a time control switch timer and an air valve controller.
The top of the collecting cover is provided with two exhaust ports which are respectively connected with a sewage branch air pipe and a heat exhaust branch air pipe, and waste gas intermittently exhausted by the waste gas pollution source and waste heat continuously exhausted by the waste heat pollution source are collected;
the blowdown branch air pipe is used for discharging waste gas intermittently discharged by the waste gas pollution source. And the electric air valve of the blowdown branch air pipe controls the opening and closing of the blowdown branch air pipe, and the blowdown branch air pipe is opened when the waste gas pollution source begins to discharge waste gas. The heat exhaust branch air pipe discharges waste heat continuously exhausted by the waste heat pollution source. The electric air valve of the heat removal branch air pipe controls the opening and closing of the heat removal branch air pipe. The time switch timer begins timing when the exhaust pollution source begins to emit exhaust. The air valve controller is used for controlling the actions of the electric air valve of the heat exhaust branch air pipe and the electric air valve of the heat exhaust branch air pipe, and when the electric air valve of the blowdown branch air pipe opens the blowdown branch air pipe, the electric air valve of the heat exhaust branch air pipe closes the heat exhaust branch air pipe; and when the time of the time control switch timer is over, the electric air valve of the blowdown branch air pipe closes the blowdown branch air pipe, and the electric air valve of the heat removal branch air pipe opens the heat removal branch air pipe. The timed on-off timer times greater than or equal to 1.5 times the maximum sustained discharge time of the exhaust gas.
A binary channels exhaust system which characterized in that: the method comprises the following steps: the system comprises at least one double-channel exhaust device, a waste gas collecting main air pipe, a waste gas purifying device, a waste gas collecting variable frequency fan, a waste heat collecting main air pipe and a waste heat collecting variable frequency fan.
Wherein, the waste gas collecting main air pipe is communicated with the blowdown branch air pipe of at least one double-channel exhaust device. The waste gas purification device is used for purifying waste gas passing through the main air pipe. The waste gas is collected and is adjusted the air-out flow in the main air duct with frequency conversion fan frequency conversion. The waste heat collecting main air pipe is communicated with the heat exhaust branch air pipe of at least one double-channel exhaust device. The waste heat collecting variable-frequency fan is used for adjusting the air outlet flow of the waste heat collecting main air pipe in a variable-frequency mode.
A double-channel air exhaust method comprises the following steps:
(1) the waste heat pollution source continuously discharges waste heat, and the waste gas pollution source intermittently discharges waste gas.
(2) When the waste gas pollution source begins to discharge waste gas needing intermittent discharge, the electric air valve of the blowdown branch air pipe opens the blowdown branch air pipe, the time control switch timer begins to time, and the air valve controller obtains an opening signal of the electric air valve of the blowdown branch air pipe and enables the electric air valve of the heat discharge branch air pipe to close the heat discharge branch air pipe.
(3) And after the time control switch timer finishes timing, the waste gas pollution source stops discharging waste gas, the air valve controller enables the electric air valve of the blowdown branch air pipe to close the blowdown branch air pipe, the closing signal of the electric air valve of the blowdown branch air pipe is acquired, and the electric air valve of the heat exhaust branch air pipe is enabled to open the heat exhaust branch air pipe.
Wherein the timing time of the time switch timer is more than or equal to 1.5 times of the longest continuous discharge time of the waste gas.
Due to the adoption of the scheme, the invention has the beneficial effects that:
the invention provides a double-air-duct exhaust system for independently collecting waste heat and waste gas of multiple devices in an industrial workshop, aiming at the different emission characteristics of the waste gas and the waste heat, the double-air-duct exhaust system is designed to exhaust air finely, the waste gas and the waste heat are collected and treated separately, the effect of discharging pollutants immediately after production and not discharging when production is achieved, the exhaust air volume of the system is reduced, the concentration of the pollutants collected by the waste gas is improved, the energy consumption of a fan of the system is reduced, the purification efficiency of purification equipment is improved, and the purposes of energy conservation and high efficiency are achieved.
Secondly, in the double-air-channel exhaust system for independently collecting the waste heat and the waste gas of the multiple devices in the industrial workshop, the waste heat and the waste gas are separately treated by arranging the double-air-channel system, and each air channel is an independent variable air volume system, so that the total air volume of the system is reduced, the collection concentration of pollutants is improved, and the energy consumption of a fan and the operation cost of a purifying device are reduced.
Thirdly, in the double-air-duct exhaust system for independently collecting the waste heat and the waste gas of the multiple devices in the industrial workshop, the opening of the electric air valve of the sewage branch air pipe is linked with a machine, the closing of the electric air valve of the sewage branch air pipe realizes time delay control through a time control switch timer, the exhaust time is the longest duration time of the waste gas emitted by a pollution source under the process, the effect of discharging the pollutants as soon as the pollutants are produced and not discharged is achieved, the ineffective exhaust in the non-emission period is avoided, and the exhaust volume and the load of a purifying device are reduced.
Fourthly, in the double-air-channel exhaust system for independently collecting the waste heat and the waste gas of the multiple devices in the industrial workshop, the control logic of the 'mutual opening and closing' of the electric air valve of the heat-exhaust branch air pipe and the electric air valve of the blowdown branch air pipe realizes the conversion of heat exhaust and waste gas collection of the collecting cover, ensures the mutual independence of the two air channels, and is the key for independently collecting the waste heat and the waste gas.
Drawings
Fig. 1 is a schematic structural view of the double-passage exhaust device of the present invention.
FIG. 2 is a flow chart of the dual duct venting method of the present invention.
Fig. 3 is a schematic structural view of a dual channel exhaust system of the present invention.
FIG. 4 is a schematic structural view of a double-air-duct exhaust system for a vulcanization plant according to the present invention.
Reference numerals:
the waste gas collecting device comprises a waste gas collecting main air pipe 1, a waste heat collecting main air pipe 2, a collecting cover 3, a waste gas collecting variable frequency fan 4, a waste heat collecting variable frequency fan 5, a waste gas purifying device 6, a blowdown sub-air pipe electric air valve 7, a heat exhaust sub-air pipe electric air valve 8, a time control switch timer 9, an air valve controller 10, a blowdown sub-air pipe 11 and a heat exhaust sub-air pipe 12.
Detailed Description
In order to solve the aforementioned problems, the present invention provides a dual duct system, which includes a main exhaust gas collecting duct 1 and a main waste heat collecting duct 2. Each air channel is an independent system and is respectively provided with a power source, and two variable frequency fans 4 and 5 are adopted for variable air volume control. The waste gas collecting main air pipe 1 and the waste heat collecting main air pipe 2 are respectively connected with the collecting cover 3 through corresponding branch air pipes. The waste gas collecting main air pipe 1 is connected to a waste gas collecting variable frequency fan 4 after passing through a waste gas purifying device 6, and the waste heat collecting main air pipe 2 is connected to a waste heat collecting variable frequency fan 5.
The double-air-channel system respectively undertakes the collection work of waste gas and waste heat through a waste gas collection main air pipe 1 and a waste heat collection main air pipe 2. The size of the waste heat collecting main air pipe 2 is determined according to the maximum ventilation quantity required by the discharged waste heat, and the size of the waste gas collecting main air pipe 1 is determined according to the maximum exhaust quantity required by the pollution source emission characteristic calculation. The variable frequency fans 4 and 5 are controlled by variable frequency, and each air channel can be regarded as an independent variable air volume system.
Two air outlets are arranged at the top of each collecting cover 3, and are respectively connected to corresponding main air pipes through branch air pipes to respectively undertake the work of heat extraction and pollution discharge. The waste heat exhaust port should be as close as possible to the heat source and the waste exhaust port should be as close as possible to the pollution source. The sizes of the exhaust port and the branch pipe are calculated according to actual process requirements.
Each branch air pipe is provided with an electric air valve, namely an electric air valve 8 of the heat exhaust branch air pipe and an electric air valve 7 of the blowdown branch air pipe, and the opening and closing relation of the two air valves of the opening and closing of the two air valves is controlled by an air valve controller 10. The opening of the electric air valve 7 of the blowdown branch air pipe is linked with the opening of the waste gas pollution source, the closing of the electric air valve 7 of the blowdown branch air pipe adopts time delay control, and the time delay control is realized through a time control switch timer 9. The longest duration time of the waste gas emitted by the pollution source under the process is determined according to experimental tests or operation experiences and is used as a time set value of the time control switch timer 9 to control the opening time of the electric air valve 7 of the sewage branch air pipe and avoid ineffective air exhaust in a non-emission period.
The air valve controller 10 controls the opening and closing of the heat exhaust branch air pipe electric air valve 8 by acquiring the opening and closing signal of the blowdown branch air pipe electric air valve 7, and the control logic is as follows: the heat removal branch air pipe electric air valve 8 and the blowdown branch air pipe electric air valve 7 cannot be opened simultaneously. When the pollution source emits waste gas, the electric air valve 7 of the blowdown branch air pipe is opened in linkage with the pollution source, and the electric air valve 8 of the heat extraction branch air pipe is correspondingly closed, so that the waste gas is prevented from leaking through the heat extraction branch air pipe. When the pollution source stops emitting waste gas and only waste heat is generated, the time control switch timer 9 stops timing, the electric air valve 7 of the blowdown branch air pipe is closed under the action of the air valve controller 10, and the electric air valve 8 of the heat exhaust branch air pipe is correspondingly opened so as to ensure that the air quantity flowing through the purifying equipment is minimum.
The dual-channel air exhausting device, the dual-channel air exhausting system and the dual-channel air exhausting method of the present invention will be further described with reference to the accompanying drawings.
< Dual duct exhaust device >
As shown in fig. 1, the present invention provides a dual path exhaust device for use in a vulcanization plant, comprising: the device comprises a collecting cover 3, a blowdown branch air pipe 11, a blowdown branch air pipe electric air valve 7, a heat exhaust branch air pipe 12, a heat exhaust branch air pipe electric air valve 8, a time control switch timer 9 and an air valve controller 10.
The blowdown branch air pipe 11 is arranged at the top of the collecting cover 3 and used for discharging waste gas intermittently discharged by the waste gas pollution source.
The electric air valve 7 of the blowdown branch air pipe is arranged on the blowdown branch air pipe 11 and used for controlling the opening or closing of the blowdown branch air pipe 11. When the waste gas pollution source begins to discharge waste gas, the electric air valve 7 of the blowdown branch air pipe simultaneously opens the blowdown branch air pipe 11.
A heat exhaust branch pipe 12 is also provided at the top of the collecting hood 3 and is independent of the blow-down branch pipe 11 for discharging the waste heat continuously exhausted from the waste heat pollution source.
The heat removal branch air pipe electric air valve 8 is arranged on the heat removal branch air pipe 12 and used for controlling the opening or closing of the heat removal branch air pipe 12. The blowdown branch air pipe 11 and the heat exhaust branch air pipe 12 are not opened at the same time. When the blowdown branch duct 11 is opened, the heat exhaust branch duct 12 is closed. When the blowdown branch air pipe 11 is closed, the heat exhaust branch air pipe 12 is opened.
The time control switch timer 9 is in signal connection with the electric air valve 7 of the blowdown branch air pipe, starts timing when the waste gas pollution source starts to discharge waste gas, generates a timing end signal after timing is finished, and the air valve controller 10 enables the electric air valve 7 of the blowdown branch air pipe to close the blowdown branch air pipe 11 after receiving the timing end signal. Time T of time control switch timerpGreater than or equal to the maximum duration T of the exhaust gasesm1.5 times of that of: t isp≥1.5Tm。TmIs the maximum duration of time that the pollutant source emits exhaust gas under the process as determined from experimental tests or operating experience. Because the exhaust gas is discharged intermittently, the exhaust gas is discharged after the timing is finished. For example, the vulcanizing plant can be a PCR semi-steel type vulcanizing plant, the maximum duration of the emission of the waste gas can be 4min, and the timing time of the time switch timer can be 6 min.
The air valve controller 10 is in signal connection with both the blowdown branch air pipe electric air valve 7 and the heat exhaust branch air pipe electric air valve 8. The control logic of the air valve controller 10 is to determine whether the heat exhaust branch pipe electric air valve 8 is closed or the heat exhaust branch pipe 12 is opened according to an opening signal or a closing signal of the blowdown branch pipe electric air valve 7, so that the heat exhaust branch pipe electric air valve 8 closes the heat exhaust branch pipe 12 when the blowdown branch pipe electric air valve 7 opens the blowdown branch pipe 11; when the electric air valve 7 of the blowdown branch air pipe closes the blowdown branch air pipe 11, the electric air valve 8 of the heat exhaust branch air pipe can open the heat exhaust branch air pipe 12, so that mutual independence of double air channels is ensured. Specifically, when the blowdown branch air pipe electric air valve 7 opens the blowdown branch air pipe 11, the air valve controller 10 acquires an opening signal of the blowdown branch air pipe electric air valve 7, and enables the heat removal branch air pipe electric air valve 8 to close the heat removal branch air pipe 12. When the electric air valve 7 of the blowdown branch air pipe closes the blowdown branch air pipe 11, the air valve controller 10 obtains a closing signal of the electric air valve 7 of the blowdown branch air pipe, and enables the electric air valve 8 of the heat removal branch air pipe to open the heat removal branch air pipe 12. This makes it possible to open the waste branch duct 11 and the waste heat branch duct 12 at the same time.
< Dual channel exhaust method >
As shown in fig. 1 and 2, the present invention provides a dual path exhaust method, which is directed to a case where a thermal waste pollution source and a waste pollution source are not the same pollution source, and which includes the steps of:
1. the waste heat pollution source continuously discharges waste heat, and the waste gas pollution source intermittently discharges waste gas.
2. When the waste gas pollution source begins to discharge waste gas, the electric air valve 7 of the blowdown branch air pipe opens the blowdown branch air pipe 11, the time control switch timer 9 begins to time, and the air valve controller 10 acquires an opening signal of the electric air valve 7 of the blowdown branch air pipe and enables the electric air valve 8 of the heat exhaust branch air pipe to close the heat exhaust branch air pipe 12. At this time, the blowdown branch duct 11 and the heat exhaust branch duct 12 are not opened at the same time.
3. When the time of the time control switch timer 9 is not over, the electric air valve 7 of the blowdown branch air pipe enables the blowdown branch air pipe 11 to be continuously maintained in an open state, and the air valve controller 10 continuously obtains an opening signal of the electric air valve 7 of the blowdown branch air pipe and enables the electric air valve 8 of the heat exhaust branch air pipe to maintain the heat exhaust branch air pipe 12 in a closed state.
4. When the timing of the time control switch timer 9 is finished, the exhaust gas pollution source stops discharging exhaust gas, the time control switch timer 9 generates a timing finishing signal, the air valve controller 10 enables the electric air valve 7 of the blowdown branch air pipe to close the blowdown branch air pipe 11 after receiving the timing finishing signal, and the air valve controller 10 obtains a closing signal of the electric air valve 7 of the blowdown branch air pipe and enables the electric air valve 8 of the heat exhaust branch air pipe to open the heat exhaust branch air pipe 12. At this time, the blowdown branch duct 11 and the heat exhaust branch duct 12 are also not opened simultaneously. And then the above steps are repeatedly performed.
In step 3, the timed on-off timer 9 times longer than or equal to 1.5 times the maximum continuous discharge time of the exhaust gas. Because the exhaust gas is discharged intermittently, the exhaust gas is discharged after the timing is finished. At this time, the blowdown branch air pipe 11 is closed to stop discharging the exhaust gas, and the heat discharging branch air pipe 12 is opened at the same time to continue discharging the heat from the heat discharging branch air pipe 12.
< two-duct exhaust System >
As shown in fig. 3, the present invention provides a dual path exhaust system, comprising: at least one double-channel exhaust device, a waste gas collecting main air pipe 1, a waste heat collecting main air pipe 2, a waste gas purifying device 6, a waste gas collecting variable frequency fan 4 and a waste heat collecting variable frequency fan 5.
The collecting cover 3 of the double-channel exhaust device is used for collecting waste gas intermittently discharged by the waste gas pollution source and waste heat continuously discharged by the waste heat pollution source. The top of the collecting hood 3 is provided with two exhaust holes which are respectively connected to corresponding main air pipes through branch air pipes. The waste heat exhaust port should be as close as possible to the source of waste heat pollution and the waste exhaust port should be as close as possible to the source of waste gas pollution. The switching of the single collecting hood 3 heat rejection and exhaust gas collection is achieved by the control of two electrically operated air valves.
The waste gas collecting main air pipe 1 is communicated with the blowdown branch air pipes 11 of at least one double-channel exhaust device, and waste gas discharged by the blowdown branch air pipes 11 of the double-channel exhaust devices is collected.
The waste gas purification device 6 is arranged at the downstream end of the waste gas collecting main air pipe 1 and used for purifying waste gas passing through the waste gas collecting main air pipe 1.
Waste gas is collected and is used frequency conversion fan 4 as the power supply frequency conversion regulation waste gas and collect the air-out flow in the main tuber pipe 1, and the waste gas after waste gas purification device 6 purifies is collected and is discharged the environment with frequency conversion fan 4 via this waste gas in.
The waste heat collecting main air pipe 2 is communicated with at least one heat discharging branch air pipe 12 of the double-channel air discharging device, and collects waste heat discharged by the heat discharging branch air pipes 12 of the double-channel air discharging device. The two main air pipes respectively undertake the work of heat extraction and pollution discharge.
The waste heat collection variable frequency fan 5 is used as a power source for variable frequency adjustment of the air outlet flow of the waste heat collection main air pipe 2.
The control logic of the dual-channel exhaust system is as follows: when the workman begins the operation, when the machine starts, through coordinated control, blowdown branch tuber pipe 11 is opened to blowdown branch tuber pipe electric air valve 7, collect cover 3 and begin the blowdown, time switch timer 9 begins the timing simultaneously, this moment under the effect of blast gate controller 10, heat extraction branch tuber pipe 12 is closed to heat extraction branch tuber pipe electric air valve 8, waste gas gets into waste gas through blowdown branch tuber pipe and collects main tuber pipe 1, discharge after the purification of exhaust gas purification device 6, because the air capacity changes in the main tuber pipe 1 is collected to waste gas, the frequency conversion is made correspondingly with frequency conversion fan 4 to waste gas collection. When the set blow-down time is 1.5Tm, the blow-down branch air pipe 11 is closed by the blow-down branch air pipe electric air valve 7, the collection cover 3 stops blow-down, the closing signal is transmitted to the air valve controller 10, the heat exhaust branch air pipe electric air valve 8 opens the heat exhaust branch air pipe 12, the collection cover 3 starts heat exhaust, a large amount of waste heat is discharged to the outdoor through the waste heat collection main air pipe 2, and meanwhile, the variable frequency fan 5 for waste heat collection and the variable frequency fan 4 for waste gas collection make variable frequency regulation according to the change of the system air volume. When the machine is started again, the heat exhaust branch air pipe electric air valve 8 closes the heat exhaust branch air pipe 12, the blowdown branch air pipe electric air valve 7 opens the blowdown branch air pipe 11, and the steps are repeated later.
Examples
The invention is especially suitable for the occasions with the characteristics of intermittent waste gas discharge and continuous waste heat discharge in the industrial production process, such as vulcanization, aluminum electrolysis and the like. The present invention will now be described in further detail with reference to a vulcanization plant.
Vulcanization is a technological process of changing the rubber into an elastic complex by using the formed tire blank under certain time, temperature and pressure to obtain the service performance. The rubber raw material is made into a green tire through the processes of rubber mixing, extrusion and the like. In this process, chemicals such as processing oil, adhesives, etc. need to be added to the rubber. These chemicals are volatilized during the vulcanization process to become vulcanization fumes, which are the main source of pollutants in the vulcanization plant. Since contamination is emitted with exposure of the tire, and a certain vulcanization time is required for tire vulcanization, the emission of contamination is intermittent; the whole vulcanization process requires a high-temperature environment with continuous generation of a large amount of waste heat.
As shown in fig. 4, fig. 4 is a schematic structural diagram of a dual air duct exhaust system for a vulcanization plant according to the present invention. The double-air-duct exhaust system comprises a waste gas collecting main air duct 1, a waste heat collecting main air duct 2, fourteen collecting covers 3, a waste gas collecting variable frequency fan 4, a waste heat collecting variable frequency fan 5, a waste gas purifying device 6, fourteen blow-down branch pipe electric air valves 7, fourteen exhaust branch pipe electric air valves 8, fourteen time control switch timers 9, fourteen air valve controllers 10 and the like.
The waste gas collecting main air pipe 1 is connected to a waste gas collecting variable frequency fan 4 after passing through a waste gas purifying device 6, and the waste heat collecting main air pipe 2 is connected to a waste heat collecting variable frequency fan 5. Fourteen branch air pipes are arranged on each main air pipe at intervals and are sequentially connected with fourteen collecting covers 3, an electric air valve is arranged on each branch pipe, wherein the electric air valve 7 of the blowdown branch pipe is opened in linkage with a corresponding machine and is controlled by a time control switch timer 9 when being closed, and the electric air valve 8 of the heat exhaust branch pipe is controlled by an air valve controller 10 when being opened and closed.
According to the characteristics of waste gas and waste heat generated in the rubber vulcanization process, the exhaust air volume of the collecting cover 3 is determined to be 4000m3H, heat removal air volume of 2000m3H; maximum duration T of exhaust gas generationm4min, considering safety factors, and determining the continuous sewage discharge time Tp to be 6 min; the total cycle time was 14 min. As shown in fig. 3, for the vulcanization plant, the control logic of the system is as follows: when the vulcanizing machine is opened, and tires are exposed in the air, pollutants begin to be emitted, the opening action of the vulcanizing machine is linked with the opening of the electric air valve 7 of the blowdown branch pipe, the collection cover 3 begins to collect vulcanized flue gas, meanwhile, the time control switch timer 9 begins to time, at the moment, under the action of the air valve controller 10, the electric air valve 8 of the heat exhaust branch pipe is in a closed state, and waste gas enters the waste gas collection main air pipe 1 through the blowdown branch pipe and is discharged after being purified by the purifying equipment 6; after 6min, namely when the set sewage discharge time is reached, the electric air valve 7 of the sewage discharge branch pipe is closed, the collection cover 3 stops discharging sewage, the closing signal is transmitted to the air valve controller 10, the electric air valve 8 of the heat discharge branch pipe is opened, the collection cover 3 starts discharging heat, and a large amount of waste heat is collected by the waste heat collection main air pipe2, discharging to the outside; after 8min, the vulcanizing machine is opened again, the electric air valve 8 of the heat exhaust branch pipe is closed, the electric air valve 7 of the sewage discharge branch pipe is opened, and the steps are repeated.
Under the scheme, the total exhaust air volume of the system in one period (14min) is 9333m3Wherein the treatment air volume of the purification equipment is 5600m3. If the traditional scheme, namely a mode of continuously inducing air with large air volume to collect and discharge, is adopted, the air discharge volume of each collecting cover is not less than 4000m3The total exhaust air volume of the system in one period (14min) is 13067m3The treatment air volume of the purification equipment is also 13067m3. Compared with the traditional scheme, the scheme of the invention can reduce the total exhaust air quantity by 28.6 percent and the treatment air quantity of the purifying equipment by 57.1 percent, has obvious energy-saving effect and has very high practical value.
In a word, compared with the prior art, the invention realizes the independent collection of waste heat and waste gas by arranging the double-air-channel exhaust system for independently collecting the waste heat and the waste gas, greatly reduces the air quantity of the system, ensures that pollutants can enter the purifying equipment at a higher concentration level, reduces the size of the equipment, reduces the initial investment, improves the purifying efficiency of the equipment, reduces the operating cost and realizes the purposes of energy conservation and high efficiency.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (4)
1. A binary channels exhaust system which characterized in that: the method comprises the following steps:
the two-channel exhaust device comprises a blowdown branch air pipe and is used for exhausting waste gas intermittently exhausted by the waste gas pollution source; the electric air valve of the blowdown branch air pipe controls the opening and closing of the blowdown branch air pipe, and the blowdown branch air pipe is opened when the waste gas pollution source begins to discharge waste gas; the heat exhaust branch air pipe is used for exhausting waste heat continuously exhausted by the waste heat pollution source; the electric air valve of the heat removal branch air pipe controls the opening and closing of the heat removal branch air pipe; the top of the collecting cover is provided with two exhaust ports which are respectively connected with the sewage exhaust branch air pipe and the heat exhaust branch air pipe to collect the waste gas and the waste heat; a time switch timer for starting timing when the exhaust pollution source starts to discharge the exhaust; the air valve controller enables the heat exhaust branch air pipe electric air valve to close the heat exhaust branch air pipe when the blowdown branch air pipe electric air valve is opened; after the time control switch timer finishes timing, enabling the electric air valve of the blowdown branch air pipe to close the blowdown branch air pipe, and enabling the electric air valve of the heat exhaust branch air pipe to open the heat exhaust branch air pipe;
the waste gas collecting main air pipe is communicated with the blowdown branch air pipe of the at least one double-channel exhaust device;
the waste gas purification device purifies waste gas passing through the waste gas collecting main air pipe;
the variable frequency fan for collecting the waste gas adjusts the air outlet flow in the waste gas collecting main air pipe in a variable frequency mode;
the waste heat collection main air pipe is communicated with the heat discharge branch air pipe of the at least one double-channel exhaust device;
the waste heat is collected and is used the frequency conversion fan, and the air-out flow of the waste heat collection main air pipe is adjusted in the frequency conversion.
2. The dual path exhaust system according to claim 1, wherein: the timed time of the time switch timer is more than or equal to 1.5 times of the longest continuous discharge time of the waste gas.
3. A two-channel exhaust method using the two-channel exhaust system according to claim 1 or 2, characterized in that: the method comprises the following steps:
the waste heat pollution source continuously discharges waste heat, and the waste gas pollution source intermittently discharges waste gas;
when the waste gas pollution source begins to discharge waste gas, the electric air valve of the blowdown branch air pipe opens the blowdown branch air pipe, the time control switch timer begins to time, and the air valve controller obtains an opening signal of the electric air valve of the blowdown branch air pipe and enables the electric air valve of the heat exhaust branch air pipe to close the heat exhaust branch air pipe;
and when the time control switch timer finishes timing, the waste gas pollution source stops discharging the waste gas, the air valve controller enables the electric air valve of the blowdown branch air pipe to close the blowdown branch air pipe, obtains a closing signal of the electric air valve of the blowdown branch air pipe and enables the electric air valve of the heat exhaust branch air pipe to open the heat exhaust branch air pipe.
4. The dual path exhaust method according to claim 3, wherein: the timed time of the time switch timer is more than or equal to 1.5 times of the longest continuous discharge time of the waste gas.
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| JP2000081216A (en) * | 1998-09-04 | 2000-03-21 | Osaka Shiroguchi Kenkyusho:Kk | Ventilator |
| CN202095185U (en) * | 2011-06-01 | 2011-12-28 | 厦门天能电子有限公司 | Improved heat-dissipation structure for surface mounting equipment for circuit board |
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| CN206755282U (en) * | 2017-01-13 | 2017-12-15 | 同济大学 | Kitchen in High Rise Apartment aggregate with outliers combined power system |
| CN206846843U (en) * | 2017-05-03 | 2018-01-05 | 深圳艺洲建筑工程设计有限公司 | A kind of new high building smog emission system |
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| JP2000081216A (en) * | 1998-09-04 | 2000-03-21 | Osaka Shiroguchi Kenkyusho:Kk | Ventilator |
| CN202095185U (en) * | 2011-06-01 | 2011-12-28 | 厦门天能电子有限公司 | Improved heat-dissipation structure for surface mounting equipment for circuit board |
| CN102589029A (en) * | 2012-03-30 | 2012-07-18 | 西安建筑科技大学 | Double-ring airflow closed auxiliary smoke exhaust system for kitchen |
| CN106765954A (en) * | 2016-12-23 | 2017-05-31 | 同济大学 | Airduct becomes air draft amount control device and control method |
| CN206755282U (en) * | 2017-01-13 | 2017-12-15 | 同济大学 | Kitchen in High Rise Apartment aggregate with outliers combined power system |
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