CN203437020U - Phosphine gas monitoring device and phosphine gas purification system - Google Patents
Phosphine gas monitoring device and phosphine gas purification system Download PDFInfo
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- CN203437020U CN203437020U CN201320497031.3U CN201320497031U CN203437020U CN 203437020 U CN203437020 U CN 203437020U CN 201320497031 U CN201320497031 U CN 201320497031U CN 203437020 U CN203437020 U CN 203437020U
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Abstract
The utility model provides a phosphine gas monitoring device and a phosphine gas purification system. The monitoring device comprises a detection unit, a control unit and an adjustment unit, wherein the detection unit is connected with the control unit and is used for detecting concentration of phosphine gas discharged by the phosphine gas purification system and sending an obtained detection value of the phosphine gas concentration to the control unit; the control unit is connected with the adjustment unit and is used for comparing the detection value of the phosphine gas strength with a default concentration safe range in the control unit and sending an adjustment command to the adjustment unit according to a comparison result; and the adjustment unit is used for adjusting gas input amount of the phosphine gas purification system according to the adjustment command of the control unit. The phosphine gas monitoring device and the phosphine gas purification system can monitor the phosphine gas concentration and improve the automation degree of purification treatment, so that the labor cost is reduced, the body injury of an operator is reduced, the stable operation of purification treatment equipment is guaranteed, the equipment is prevented from being switched on and switched off frequently, and the application range is wider.
Description
Technical field
The utility model relates to gas concentration inspect and control technology field, is specifically related to a kind of phosphine gas supervising device and phosphine gas cleaning system.
Background technology
The industries such as grain, tobacco, Chinese herbal medicine need storage for a long time, in the process of storage, be easy to produce insect pest, therefore most domestic grain depot ,Yan factory, Chinese herbal medicine Drug Storage, carry out the insecticidal operation of warehousing storage at twice in spring, autumn (insect larvae and eggs incubation period) respectively.In desinsection process, first need storehouse carry out airtight or make tent with plastic sheeting, the storing that need to carry out desinsection seals, and passes into phosphine gas in confined space, utilizes the bio-toxicity of hydrogen phosphide that insect is killed.But after desinsection, the residual a large amount of phosphine gas of meeting in storehouse or tent, and phosphine gas has toxicity, to health and atmospheric environment, can produce threat, must remove.
At present, be to utilize reclaimer mostly, residual phosphine gas in storehouse or in tent is carried out to purified treatment, its content is reached in the safe range of human body.Its main implementation procedure is, is provided with the first valve, and arranges one with the pipeline of the second valve before the gas outlet of purification apparatus, and this pipeline directly connects air exhauster.Utilize online hydrogen phosphide checkout equipment, detect the phosphine gas concentration of purification apparatus gas outlet, if phosphine gas concentration detected, be less than safety value, manually open the first valve, and close the second valve, the gas (safe gas) after processing via purification apparatus is discharged in atmosphere; If phosphine gas concentration detected, be greater than safety value, manually close the first valve, and open the second valve, to the gas (toxic gas) after processing via purification apparatus is transported to air exhauster, be delivered to again purification apparatus, in continuation, loop purified treatment.
There is following shortcoming in existing phosphine gas monitoring and purification scheme: 1, adopts manual monitoring phosphine gas concentration, manual adjustment purification apparatus, complex operation, human cost is high, and because phosphine gas is toxic gas, can damage the healthy of operating personnel; 2, when phosphine gas concentration is higher, purification apparatus is opening and closing continually, in intermittently used state, cannot stablize processing, and equipment service efficiency is low, and, if equipment frequently carries out switch, can increase failure risk and the proportion of goods damageds; 3, when phosphine gas concentration is too high, by circularly purifying in system, purification apparatus there will be the excessive situation of load, exists and processes risk not up to standard, uses and has limitation, and the scope of application is little.
Therefore, need a kind of phosphine gas monitoring and purification scheme badly in order to solve the problems of the technologies described above.
Utility model content
The utility model is for above shortcomings in prior art, a kind of phosphine gas supervising device and phosphine gas cleaning system are provided, low in order to solve existing scheme automaticity, the problem that purification apparatus service efficiency is low, the proportion of goods damageds are high, the scope of application is little.
The utility model, for solving the problems of the technologies described above, adopts following technical scheme:
A supervising device, is applied in phosphine gas cleaning system, and this phosphine gas supervising device comprises: detecting unit, control module and regulon, be preset with concentration safe range in described control module; Described detecting unit is connected with described control module, the concentration of the phosphine gas of discharging for detection of described phosphine gas cleaning system, and the phosphine gas concentration detected value that detection is obtained sends to described control module; Described control module is connected with described regulon, for by described phosphine gas concentration detected value and in it default concentration safe range compare, and to described regulon, send regulating command according to comparative result; Described regulon, for according to the regulating command of described control module, regulates the air inflow of phosphine gas cleaning system.
Preferably, described concentration safe range is the number range between first threshold and Second Threshold; Described first threshold is the minimum of a value of the concentration of the phosphine gas that discharges in described phosphine gas cleaning system stable operation situation; Described Second Threshold is the maximum of the concentration of the phosphine gas of the described phosphine gas cleaning system discharge of permission;
Described control module is used for, and when the described phosphine gas concentration detected value of judgement is less than first threshold, sends the regulating command that increases air inflow to described regulon; And, when the described phosphine gas concentration detected value of judgement is greater than Second Threshold, to described regulon, send the regulating command that reduces air inflow;
Described regulon is used for, and increases the air inflow of phosphine gas cleaning system according to the regulating command of described increase air inflow, and the air inflow that reduces phosphine gas cleaning system according to the regulating command of described minimizing air inflow.
Concrete, described control module is used for, when the described phosphine gas concentration detected value of judgement is less than first threshold, calculate the difference between first threshold and phosphine gas concentration detected value, and calculate the ratio of described difference and phosphine gas concentration detected value, this ratio is carried in the regulating command that increases air inflow, sends to described regulon; And when the described phosphine gas concentration of judgement is greater than Second Threshold, calculate phosphine gas concentration detected value and Second Threshold and between difference, and calculate the ratio of described difference and phosphine gas concentration detected value, this ratio is carried in the regulating command that reduces air inflow, sends to described regulon;
Described regulon is used for, and increases the air inflow of phosphine gas cleaning system according to the ratio carrying in the regulating command of described increase air inflow; And the air inflow that reduces phosphine gas cleaning system according to the ratio carrying in the regulating command of described minimizing air inflow.
Preferably, the scope of described first threshold is set to 0.01-0.15ppm, and the scope of described Second Threshold is set to 0.15-0.21ppm.
Further, be preset with the air inflow initial value of regulon in described control module, described air inflow initial value is to make the concentration of the phosphine gas of described phosphine gas cleaning system discharge be less than the value of described first threshold;
Described control module also for, when described phosphine gas cleaning system initializes, to described regulon, send the regulating command that carries described air inflow initial value;
Described regulon also for, when described phosphine gas cleaning system initializes, according to described air inflow initial value, control the air inflow of phosphine gas cleaning system.
Preferably, the scope of described first threshold is set to 0.01-0.15ppm; Described air inflow initial value is set to 50-100m
3/ h.
Further, this phosphine gas supervising device also comprises display unit, and described display unit is connected with described detecting unit, and described detecting unit also sends to described display unit for the phosphine gas concentration detected value that detection is obtained; Described display unit is used for showing described phosphine gas concentration detected value.
Preferably, described control module adopts programmable logic controller (PLC) PLC; Described regulon adopts control valve; Described detecting unit adopts detection probe.
The utility model also provides a kind of phosphine gas cleaning system, comprises air exhauster and purification apparatus, also comprises aforesaid phosphine gas supervising device.
Preferably, air exhauster is connected with the air inlet pipe of purification apparatus, and the regulon of phosphine gas supervising device adopts control valve, and described control valve is arranged in the air inlet pipe of purification apparatus;
The detecting unit of phosphine gas supervising device adopts detection probe, and described detection probe is inserted in the escape pipe of purification apparatus.
The utlity model has following beneficial effect:
The utility model phosphine gas supervising device utilizes detecting unit to detect the concentration of the phosphine gas of cleaning system discharge, by control module by phosphine gas concentration detected value and in it default concentration safe range compare, and according to the air inflow of comparative result control and regulation unit adjusting phosphine gas cleaning system, thereby improve the monitoring of phosphine gas concentration and the automaticity of purified treatment, reduce cost of labor, reduce operating personnel's physical impairment; And within the phosphine gas concentration after purified treatment can being controlled to preset range, guarantee purification apparatus smooth working, avoid frequent switchgear, to reduce loss and the fault rate of equipment, increase equipment service efficiency; The utility model phosphine gas cleaning system has been abandoned the purified treatment pattern of circulation in traditional phosphine gas cleaning system, but the phosphine gas concentration of discharging according to self, air inflow to self is controlled, in the situation that phosphine gas concentration is higher, also can work, the purified treatment that can adapt to the phosphine gas of variable concentrations, the scope of application is more extensive.
Accompanying drawing explanation
The structural representation of the phosphine gas cleaning system that Fig. 1 provides for the utility model embodiment;
The structured flowchart of the phosphine gas supervising device that Fig. 2 provides for the utility model embodiment.
The specific embodiment
For making those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, 2, the utility model embodiment provides a kind of phosphine gas cleaning system, and this system comprises: phosphine gas supervising device 1, air exhauster 2 and purification apparatus 3.
One end of air exhauster 2 is connected with the storehouse of processing to be clean or tent, and the other end is connected with the air inlet pipe 31 of purification apparatus 3, for the storehouse of processing to be clean or tent being contained to the air suction purification apparatus 3 of phosphine gas.The escape pipe 32 of purification apparatus 3 is communicated with atmosphere, and for the phosphine gas after purified treatment is discharged into atmosphere, purification apparatus 3 can adopt absorption reaction tower to realize.
Preferably, the regulon 13 of phosphine gas supervising device 1 adopts control valve, and control valve is arranged in the air inlet pipe 31 of purification apparatus 3.The detecting unit 11 of phosphine gas supervising device 1 adopts detection probe, and detection probe is inserted in the escape pipe 32 of purification apparatus 3.
Below in conjunction with Fig. 2, the structure of phosphine gas supervising device is elaborated.As shown in the figure, phosphine gas supervising device 1 can comprise: detecting unit 11, control module 12 and regulon 13.Detecting unit 11 is connected with the escape pipe 32 of purification apparatus 3, for detection of the phosphine gas concentration in the escape pipe 32 of purification apparatus 3, be the concentration of the phosphine gas cleaning system phosphine gas of discharging, and phosphine gas concentration detected value is sent to control module 12.In control module 12, be preset with concentration safe range, control module 12 is connected with regulon 13, for described phosphine gas concentration detected value and default concentration safe range in it are compared, and according to comparative result to described regulon transmission regulating command.The regulating command of regulon 13 for sending according to control module 12, the air inflow (being the air inflow of phosphine gas cleaning system) of adjusting purification apparatus 3.
Preferably, detecting unit 11 can adopt detection probe, and detection probe is inserted in the escape pipe 32 of purification apparatus 3, in order to detect the phosphine gas concentration in tracheae 32.
Concentration safe range is specially the number range between first threshold and Second Threshold.In order to make the purification apparatus 3 can smooth working, avoid the frequent switch of equipment, increase equipment service efficiency, reduce equipment loss and fault rate, in control module 12, be provided with first threshold, as the minimum work thresholding of purification apparatus 3.First threshold is the minimum of a value of the concentration of the phosphine gas that discharges in described phosphine gas cleaning system stable operation situation.Preferably, the scope of first threshold can be set to 0.01-0.15ppm.
In control module 12, be also provided with Second Threshold, Second Threshold is the maximum of the concentration of the phosphine gas of permission phosphine gas cleaning system discharge.Preferably, the scope of Second Threshold can be set to 0.15-0.21ppm.Wherein, 0.21ppm is the upper limit of phosphine gas concentration in discharging standards, lower than the phosphine gas of this concentration, can think that to human body and environment be nontoxic, belongs to safe range.
First threshold and Second Threshold can be according to the differences of application scenarios, and the difference of environmental requirement, set as required.Within the phosphine gas concentration that phosphine gas cleaning system gives off is controlled in the number range between first threshold and Second Threshold.
Concrete, control module 12 for, when judgement phosphine gas concentration detected value is less than first threshold, to regulon 13, send the regulating command that increases air inflows; And, when judgement phosphine gas concentration detected value is greater than Second Threshold, to regulon 13, send the regulating command that reduces air inflow.In a specific embodiment, the detection signal that control module 12 can send the detecting unit receiving 13 is converted into the control signal of low and high level, for example, the regulating command of the increase air inflow that control module 12 sends to regulon 13, can represent by high level; The regulating command of the minimizing air inflow that control module 12 sends to regulon 13, can represent by low level.
Accordingly, regulon 13 for, according to the regulating command that increases air inflow, increase the air inflow of purification apparatus 3; And, according to the regulating command that reduces air inflow, reduce the air inflow of purification apparatus 3.
Preferably, control module 12 specifically for, when judging phosphine gas concentration detected value and be less than first threshold, calculate the difference between first threshold and this phosphine gas concentration detected value, and calculate the ratio of described difference and this phosphine gas concentration detected value, this ratio is carried in the regulating command that increases air inflow, sends to regulon 13; And, when judging phosphine gas concentration detected value and be greater than Second Threshold, calculate this phosphine gas concentration detected value and Second Threshold and between difference, and calculate the ratio of described difference and this phosphine gas concentration detected value, this ratio is carried in the regulating command that reduces air inflow, sends to regulon 13.
Accordingly, regulon 13 specifically for, according to increasing the ratio carrying in the regulating command of air inflow, increase the air inflow of purification apparatus 3; And, according to reducing the ratio carrying in the regulating command of air inflow, reduce the air inflow of purification apparatus 3.
For example, if it is 0.09ppm that detecting unit 11 detects the interior phosphine gas concentration of escape pipe 32, control module 12 is judged phosphine gas concentration detected value and is less than after first threshold (0.1ppm), calculating the two difference is 0.01, and calculate the ratio of this difference and phosphine gas concentration detected value: 0.01/0.09=11%, this ratio is carried in the regulating command that increases air inflow, send to regulon 13, accordingly, regulon 13 increases by 11% by the air inflow of purification apparatus 3.If it is 0.31ppm that detecting unit 11 detects the interior phosphine gas concentration of escape pipe 32, control module 12 is judged phosphine gas concentration detected value and is greater than after Second Threshold (0.21ppm), calculating the two difference is 0.1, and calculate the ratio of this difference and this phosphine gas concentration detected value: 0.1/0.31=32.3%, this ratio is carried in the regulating command that reduces air inflow, send to regulon 13, accordingly, regulon 13 reduces 32.3% by the air inflow of purification apparatus 3.
Preferably, control module 12 can adopt PLC (Programmable Logic Controller, programmable logic controller (PLC)) to realize.
Further, in control module 12, be preset with the air inflow initial value of regulon 13, air inflow initial value is to make phosphine gas concentration (being the concentration of the phosphine gas of phosphine gas cleaning system discharge) in the escape pipe 32 of purification apparatus 3 be less than the value of first threshold.
Control module also for, when phosphine gas cleaning system initializes, to regulon 13, send the regulating command that carries described air inflow initial value.Accordingly, regulon 13 also for, when phosphine gas cleaning system initializes, according to air inflow initial value, control the air inflow (being the air inflow of air inlet pipe 31) of phosphine gas cleaning system.
Conventionally, the full admission amount of traditional purification apparatus 3 is 800-1000m
3/ h, preferred, the scope of first threshold is set in the situation of 0.01-0.15ppm, and air inflow initial value can be set to 50-100m
3/ h.
The effect that the air inflow initial value of regulon 13 is set is, when phosphine gas cleaning system initially powers on, control the air inflow of purification apparatus 3, so that the phosphine gas concentration in escape pipe 32 is less than first threshold, and the air inflow that another phosphine gas supervising device 1 is controlled purification apparatus 3 automatically increases gradually, until the phosphine gas concentration in escape pipe 32 reaches the scope between first threshold and Second Threshold, and then realize the automatic control of phosphine gas cleaning system.
Preferably, regulon 13 can adopt control valve, and described control valve is arranged in the air inlet pipe 31 of purification apparatus 3.
Further, for handled easily personnel understand, the purge cases of grasp phosphine gas, in phosphine gas supervising device 1, can also include display unit 14, display unit 14 is connected with detecting unit 11, the phosphine gas concentration detected value that described detecting unit 11 obtains detection sends to control module 12, and send to display unit 14, the phosphine gas concentration (being phosphine gas concentration detected value) that display unit 14 detects for showing detecting unit 11.Preferably, display unit 14 can adopt LCDs, and display unit 14 can be connected with detecting unit 11 by control line.
For the clear technical scheme of describing the utility model embodiment, below in conjunction with the course of work of 1,2 pairs of above-mentioned phosphine gas supervising devices of accompanying drawing and phosphine gas cleaning system, elaborate.
As shown in the figure, when phosphine gas cleaning system initializes, the air that contains phosphine gas in storehouse or tent is pumped to purification apparatus 3 (absorption reaction tower) by air exhauster 2, the control module 12 (PLC) of phosphine gas supervising device 1 controls to adjust unit 13 (control valve) with corresponding flow according to default air inflow initial value, control air exhauster 2 to the air-supply of absorption reaction tower, thereby control the air inflow of absorption reaction tower.After the air that contains phosphine gas is cleaned in absorption reaction tower, from escape pipe 32, discharge, the detecting unit 11 (detection probe) inserting in escape pipe 32 detects phosphine gas concentration in real time, and testing result is sent to PLC, now, because the air inflow of absorption reaction tower is air inflow initial value, therefore, the phosphine gas concentration in escape pipe 32 is less than first threshold.PLC calculates the difference between first threshold and phosphine gas concentration detected value, and calculate the ratio of described difference and this phosphine gas concentration detected value, this ratio is carried in the regulating command that increases air inflow, send to control valve, with indication control valve, increase the air inflow of absorption reaction tower according to this ratio, controlling to adjust valve increases valve flow according to corresponding ratio.By aforesaid operations, between detection probe, PLC and control valve, automatically coordinate, within can gradually the phosphine gas concentration in escape pipe 32 being controlled to the number range between first threshold and Second Threshold.If phosphine gas concentration increases suddenly in storehouse or tent, cause the phosphine gas concentration in the escape pipe 32 of absorption reaction tower to be greater than Second Threshold, PLC calculate phosphine gas concentration detected value and Second Threshold and between difference, and calculate the ratio of described difference and this phosphine gas concentration detected value, this ratio is carried in the regulating command that reduces air inflow, send to control valve, with indication control valve, according to this ratio, reduce the air inflow of absorption reaction tower, control to adjust valve valve flow is reduced to corresponding ratio, like this, phosphine gas concentration in escape pipe 32 will decline.If the phosphine gas concentration that detection probe detects in escape pipe 32 is more than or equal to first threshold, and be less than or equal to Second Threshold, PLC can not control to adjust valve and changes flow, makes within phosphine gas concentration in escape pipe 32 remains on the number range between first threshold and Second Threshold.In above-mentioned phosphine gas monitoring and purification process, phosphine gas concentration detected value can show in real time by display unit 14, for operating personnel, monitors in real time the situation that phosphine gas purifies.
The utility model phosphine gas supervising device utilizes detecting unit to detect the concentration of the phosphine gas of cleaning system discharge, by control module by phosphine gas concentration detected value and in it default concentration safe range compare, and according to the air inflow of comparative result control and regulation unit adjusting phosphine gas cleaning system, thereby improve the monitoring of phosphine gas concentration and the automaticity of purified treatment, reduce cost of labor, reduce operating personnel's physical impairment; And within the phosphine gas concentration after purified treatment can being controlled to preset range, guarantee purification apparatus smooth working, avoid frequent switchgear, to reduce loss and the fault rate of equipment, increase equipment service efficiency; The utility model phosphine gas cleaning system has been abandoned the purified treatment pattern of circulation in traditional phosphine gas cleaning system, but the phosphine gas concentration of discharging according to self, air inflow to self is controlled, in the situation that phosphine gas concentration is higher, also can work, the purified treatment that can adapt to the phosphine gas of variable concentrations, the scope of application is more extensive.
Be understandable that, above embodiment is only used to principle of the present utility model is described and the illustrative embodiments that adopts, yet the utility model is not limited to this.For those skilled in the art, in the situation that not departing from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement are also considered as protection domain of the present utility model.
Claims (10)
1. a phosphine gas supervising device, is applied to, in phosphine gas cleaning system, it is characterized in that, this phosphine gas supervising device comprises: detecting unit, control module and regulon, be preset with concentration safe range in described control module;
Described detecting unit is connected with described control module, the concentration of the phosphine gas of discharging for detection of described phosphine gas cleaning system, and the phosphine gas concentration detected value that detection is obtained sends to described control module;
Described control module is connected with described regulon, for by described phosphine gas concentration detected value and in it default concentration safe range compare, and to described regulon, send regulating command according to comparative result;
Described regulon, for according to the regulating command of described control module, regulates the air inflow of phosphine gas cleaning system.
2. phosphine gas supervising device as claimed in claim 1, is characterized in that, described concentration safe range is the number range between first threshold and Second Threshold; Described first threshold is the minimum of a value of the concentration of the phosphine gas that discharges in described phosphine gas cleaning system stable operation situation; Described Second Threshold is the maximum of the concentration of the phosphine gas of the described phosphine gas cleaning system discharge of permission;
Described control module is used for, and when the described phosphine gas concentration detected value of judgement is less than first threshold, sends the regulating command that increases air inflow to described regulon; And when the described phosphine gas concentration detected value of judgement is greater than Second Threshold, to described regulon, send the regulating command that reduces air inflow;
Described regulon is used for, and increases the air inflow of phosphine gas cleaning system according to the regulating command of described increase air inflow, and the air inflow that reduces phosphine gas cleaning system according to the regulating command of described minimizing air inflow.
3. phosphine gas supervising device as claimed in claim 2, it is characterized in that, described control module specifically for, when the described phosphine gas concentration detected value of judgement is less than first threshold, calculate the difference between first threshold and phosphine gas concentration detected value, and calculate the ratio of described difference and phosphine gas concentration detected value, and this ratio is carried in the regulating command that increases air inflow, send to described regulon; And when the described phosphine gas concentration of judgement is greater than Second Threshold, calculate phosphine gas concentration detected value and Second Threshold and between difference, and calculate the ratio of described difference and phosphine gas concentration detected value, this ratio is carried in the regulating command that reduces air inflow, sends to described regulon;
Described regulon specifically for, according to the ratio that carries in the regulating command of described increase air inflow, increase the air inflow of phosphine gas cleaning system; And according to the ratio carrying in the regulating command of described minimizing air inflow, reduce the air inflow of phosphine gas cleaning system.
4. phosphine gas supervising device as claimed in claim 2, is characterized in that, the scope of described first threshold is set to 0.01-0.15ppm, and the scope of described Second Threshold is set to 0.15-0.21ppm.
5. phosphine gas supervising device as claimed in claim 2, it is characterized in that, in described control module, be preset with the air inflow initial value of regulon, described air inflow initial value is to make the concentration of the phosphine gas of described phosphine gas cleaning system discharge be less than the value of described first threshold;
Described control module also for, when described phosphine gas cleaning system initializes, to described regulon, send the regulating command that carries described air inflow initial value;
Described regulon also for, when described phosphine gas cleaning system initializes, according to described air inflow initial value, control the air inflow of phosphine gas cleaning system.
6. phosphine gas supervising device as claimed in claim 5, is characterized in that, the scope of described first threshold is set to 0.01-0.15ppm; Described air inflow initial value is set to 50-100m
3/ h.
7. phosphine gas supervising device as claimed in claim 1, is characterized in that, also comprises display unit, and described display unit is connected with described detecting unit;
Described detecting unit also sends to described display unit for the phosphine gas concentration detected value that detection is obtained;
Described display unit is used for showing described phosphine gas concentration detected value.
8. the phosphine gas supervising device as described in claim 1-7 any one, is characterized in that, described control module adopts programmable logic controller (PLC) PLC; Described regulon adopts control valve; Described detecting unit adopts detection probe.
9. a phosphine gas cleaning system, comprises air exhauster and purification apparatus, it is characterized in that, this system also comprises the phosphine gas supervising device described in claim 1-8 any one.
10. phosphine gas cleaning system as claimed in claim 9, it is characterized in that, air exhauster is connected with the air inlet pipe of purification apparatus, and the regulon of phosphine gas supervising device adopts control valve, and described control valve is arranged in the air inlet pipe of purification apparatus;
The detecting unit of phosphine gas supervising device adopts detection probe, and described detection probe is inserted in the escape pipe of purification apparatus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320497031.3U CN203437020U (en) | 2013-08-14 | 2013-08-14 | Phosphine gas monitoring device and phosphine gas purification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320497031.3U CN203437020U (en) | 2013-08-14 | 2013-08-14 | Phosphine gas monitoring device and phosphine gas purification system |
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| CN203437020U true CN203437020U (en) | 2014-02-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307353A (en) * | 2014-11-19 | 2015-01-28 | 湖南华望熏蒸消毒有限公司 | Solid treating agent and device for purifying phosphine gas and use method of device |
| CN104698957A (en) * | 2015-03-20 | 2015-06-10 | 苏州首旗信息科技有限公司 | Intelligent monitoring equipment for industrial gases |
| CN105278568A (en) * | 2015-11-11 | 2016-01-27 | 杭州钛合智造电器有限公司 | Hysteresis formaldehyde concentration automatic control method |
-
2013
- 2013-08-14 CN CN201320497031.3U patent/CN203437020U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307353A (en) * | 2014-11-19 | 2015-01-28 | 湖南华望熏蒸消毒有限公司 | Solid treating agent and device for purifying phosphine gas and use method of device |
| CN104698957A (en) * | 2015-03-20 | 2015-06-10 | 苏州首旗信息科技有限公司 | Intelligent monitoring equipment for industrial gases |
| CN105278568A (en) * | 2015-11-11 | 2016-01-27 | 杭州钛合智造电器有限公司 | Hysteresis formaldehyde concentration automatic control method |
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Granted publication date: 20140219 |