CN201788380U - Biogas desulfurization automatic control system for detecting contents of methane, sulfurated hydrogen and oxygen - Google Patents
Biogas desulfurization automatic control system for detecting contents of methane, sulfurated hydrogen and oxygen Download PDFInfo
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- CN201788380U CN201788380U CN2010202955739U CN201020295573U CN201788380U CN 201788380 U CN201788380 U CN 201788380U CN 2010202955739 U CN2010202955739 U CN 2010202955739U CN 201020295573 U CN201020295573 U CN 201020295573U CN 201788380 U CN201788380 U CN 201788380U
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Abstract
The utility model discloses a biogas desulfurization automatic control system for detecting contents of methane, sulfurated hydrogen and oxygen. The automatic control system comprises a biogas desulfurization reaction zone gas content control system and a biogas drainage zone gas content detection system; the biogas desulfurization reaction zone gas content control system comprises an air intake automatic regulating valve, a methane intake automatic regulating valve, a gas flow meter, a dissolved oxygen probe, an oxygen probe, an oxygen alarm apparatus and a data acquisition analysis control device; and the biogas drainage zone gas content detection system comprises a sulfurated hydrogen probe, an oxygen probe, a sulfurated hydrogen alarm apparatus, an oxygen alarm apparatus and a biogas drainage automatic regulating valve. The biogas desulfurization automatic control system has the following advantages: firstly, the content of gas in a biogas desulfurization reaction zone is monitored real-timely, so that the biogas desulfurization is efficient and safe; secondly, the content of the gas in a biogas drainage zone is online monitored, so that the safe use of the purified biogas is further guaranteed; and thirdly, the continuously running of the biogas desulfurization is realized through the automatic control, and elementary sulfur is can be reclaimed.
Description
Technical field
The utility model relates to a kind of biogas desulfurization automation control system that detects based on methane, sulfuretted hydrogen and oxygen content, is applicable to the biogas desulfurization engineering.
Background technology
Biogas under world today's energy starved situation, makes full use of the biogas energy as the energy of class cleaning, can alleviate the pressure that China's energy scarcity brings.Biogas is a kind of flammable mixed gas, generally contains methane, carbon dioxide and a spot of ammonia, hydrogen and carbon monoxide etc., often contains the sulfuretted hydrogen (H of different content in the biogas that different raw materials is made
2S).H
2S is a kind of harmful gas of severe toxicity, and it has strong corrosive attack to pipeline, instrument and equipment, and leakage with atmosphere pollution, is detrimental to health in air.Therefore,, prolong service life of equipment, must adopt an effective measure and carry out biogas desulfurization in order to protect health.Environmental Protection in China standard strict regulations: when utilizing biogas energy, H in the biogas
2S content must not surpass 20mg/m
3H in the biogas
2The S mass concentration is generally 1～12g/m
3, be higher than the regulation of Environmental Protection in China standard far away.So, H
2Removing of S becomes a requisite link in the biogas use.
The method of biogas desulfurization has chemical method, physico-chemical process and bioanalysis.Physico-chemical process commonly used generally can be divided into direct desulfurization and indirect desulfurization two big classes.The principle of biogas direct desulfurization method can be divided into damp process and dry process two classes.Wet desulphurization is to utilize specific solvent to contact with back flow of gas and remove wherein H
2S, solvent absorbs after regenerating again; Dry desulfurization is with O
2Make H
2S is oxidized to a kind of method of sulphur or oxysulfide, also can be described as dry type oxidation process.
The biological desulphurization of biogas is to utilize the metabolism of microorganism that the sulfuretted hydrogen in the biogas is converted into elemental sulfur or sulfate.Its process can be divided into 3 stages: the one, and H
2The course of dissolution of S gas is promptly transferred to liquid phase by gas phase; The 2nd, the H after the dissolving
2S is absorbed by microorganism, is transferred in the body of microorganism; The 3rd, advance the H in people's microbial cell
2S is decomposed, transforms and utilize by microorganism as nutrition, removes H thereby reach
2The purpose of S.The major advantage of biogas desulfurization is: do not need chemical catalyst, do not have secondary pollution; Power consumption is few, and processing cost is low; H
2S clearance height, and recyclable elemental sulfur.
At present, state's inner desulfurization technology is comparative maturity, and sulfur method and sulfur removal technology are numerous.But no matter be biological desulphurization or physico-chemical process desulfurization, all have potential safety hazard.When methane content reaches 5%～15% in the air, meet naked light and can blast, and after the desulfurization in the biogas oxygen content surpass at 1% o'clock, can bring danger equally.In addition, after the desulfurization in the biogas if still contain the H of more amount
2S gas can destroy the use device of later stage biogas.For this reason, the safety control system of methane-desulfurizing device is to ensure the safe operation of biogas desulfurization reaction and the key point of biogas desulfurization technology application as the intelligent control unit of desulfurizer.In addition, how to control rational aeration rate, make the end-product behind the biological desulphurization be controlled to be sulphur simple substance, realize that the recycling of elemental sulfur is the difficult point of present biogas desulfurization technology by robotization.
Summary of the invention
The purpose of this utility model is the blank at the biogas desulfurization safety control system, and a kind of biogas desulfurization automation control system that detects based on methane, sulfuretted hydrogen and oxygen content is provided.
Based on methane, the biogas desulfurization automation control system that sulfuretted hydrogen and oxygen content detect comprises biogas desulfurization reaction zone gas content control system and firedamp drainage district gas content detection system, biogas desulfurization reaction zone gas content control system comprises the air gas flowmeter, the air inlet automatic regulating valve, biogas air inlet automatic regulating valve, the biogas flowmeter, first oxygen probe, the first oxygen alarm, dissolved oxygen probe and data collection and analysis regulation device, the air gas flowmeter links to each other with the biogas desulfurization reaction zone through the air inlet automatic regulating valve, the biogas flowmeter links to each other with the biogas desulfurization reaction zone through biogas air inlet automatic regulating valve, be provided with first oxygen probe and dissolved oxygen probe in the biogas desulfurization reaction zone, the first oxygen alarm, one end links to each other with first oxygen probe, firedamp drainage district gas content detection system comprises the sulfuretted hydrogen alarm, the sulfuretted hydrogen probe, second oxygen probe, biogas effluxes the automatic regulating valve and the second oxygen alarm, be provided with the sulfuretted hydrogen probe in the firedamp drainage district, second oxygen probe, sulfuretted hydrogen alarm one end links to each other with the sulfuretted hydrogen probe, the second oxygen alarm, one end links to each other with second oxygen probe, biogas effluxes automatic regulating valve one end and links to each other with the firedamp drainage district, the firedamp drainage district links to each other with the biogas desulfurization reaction zone, the data collection and analysis regulation device respectively with the first oxygen alarm other end, the sulfuretted hydrogen alarm other end, the second oxygen alarm other end, the air inlet automatic regulating valve, biogas air inlet automatic regulating valve, dissolved oxygen probe effluxes automatic regulating valve with biogas and links to each other.
The internal mode annexation of described data collection and analysis regulation device is: main control processor is connected with digital quantity input module with analog quantity load module, switching value input conditioning module, the unlimited communication module of sensor, power circuit, electric control valve control module, digital quantity output module respectively, and the unlimited communication module of sensor is connected with sensor power supply interface, power circuit and electric control valve control module.
The beneficial effects of the utility model have: 1. by biogas desulfurization reaction zone gas content is monitored in real time, realize efficient, the safe operation of biogas desulfurization; 2. by utilizing firedamp drainage district gas gas content detection system, sulfuretted hydrogen and oxygen content in the control biogas ensure that further purifying back biogas can use safely; 3. realize that by robotization control biogas desulfurization moves continuously, and recyclable sulphur simple substance; 4. this biogas desulfurization automation control system both had been suitable for the physico-chemical process desulfurization of biogas, also was suitable for the biological desulphurization of biogas.
Description of drawings
Fig. 1 is based on the biogas desulfurization automation control system synoptic diagram that methane, sulfuretted hydrogen and oxygen content detect;
Fig. 2 is the circuit block diagram of data collection and analysis regulation device of the present utility model;
Fig. 3 is based on the biogas desulfurization automation control method process flow diagram that methane, sulfuretted hydrogen and oxygen content detect;
Among the figure: air gas flowmeter 1, air inlet automatic regulating valve 2, biogas air inlet automatic regulating valve 3, biogas flowmeter 4, first oxygen probe, 5, the first oxygen alarm 6, dissolved oxygen probe 7, data collection and analysis regulation device 8, sulfuretted hydrogen alarm 9, sulfuretted hydrogen probe 10, second oxygen probe 11, biogas efflux automatic regulating valve 12, the second oxygen alarm 13.
Embodiment
As shown in Figure 1, based on methane, the biogas desulfurization automation control system that sulfuretted hydrogen and oxygen content detect comprises biogas desulfurization reaction zone gas content control system and firedamp drainage district gas content detection system, biogas desulfurization reaction zone gas content control system comprises air gas flowmeter 1, air inlet automatic regulating valve 2, biogas air inlet automatic regulating valve 3, biogas flowmeter 4, first oxygen probe 5, the first oxygen alarm 6, dissolved oxygen probe 7 and data collection and analysis regulation device 8, air gas flowmeter 1 links to each other with the biogas desulfurization reaction zone through air inlet automatic regulating valve 2, biogas flowmeter 4 links to each other with the biogas desulfurization reaction zone through biogas air inlet automatic regulating valve 3, be provided with first oxygen probe 5 and dissolved oxygen probe 7 in the biogas desulfurization reaction zone, the first oxygen alarm, 6 one ends link to each other with first oxygen probe 5, firedamp drainage district gas content detection system comprises sulfuretted hydrogen alarm 9, sulfuretted hydrogen probe 10, second oxygen probe 11, biogas effluxes the automatic regulating valve 12 and the second oxygen alarm 13, be provided with sulfuretted hydrogen probe 10 in the firedamp drainage district, second oxygen probe 11, sulfuretted hydrogen alarm 9 one ends link to each other with sulfuretted hydrogen probe 10, the second oxygen alarm, 13 1 ends link to each other with second oxygen probe 11, biogas effluxes automatic regulating valve 12 1 ends and links to each other with the firedamp drainage district, the firedamp drainage district links to each other with the biogas desulfurization reaction zone, data collection and analysis regulation device 8 respectively with the first oxygen alarm, 6 other ends, sulfuretted hydrogen alarm 9 other ends, the second oxygen alarm, 13 other ends, air inlet automatic regulating valve 2, biogas air inlet automatic regulating valve 3, dissolved oxygen probe 7 effluxes automatic regulating valve 12 with biogas and links to each other.
As shown in Figure 2, the internal mode annexation of data collection and analysis regulation device is: main control processor is connected with digital quantity input module with analog quantity load module, switching value input conditioning module, the unlimited communication module of sensor, power circuit, electric control valve control module, digital quantity output module respectively, and the unlimited communication module of sensor is connected with sensor power supply interface, power circuit and electric control valve control module.
The model of analog quantity load module is R-802X, the model of switching value input conditioning module is SAGS/XD-2600, the model of the unlimited communication module of sensor is STR-30, the model of electric control valve control module is CPA101-220, the model of digital quantity output module is EM223CN, and the model of digital quantity input module is EM222CN.
As shown in Figure 3, read hydrogen sulfide content by the sulfuretted hydrogen probe, read oxygen content by first oxygen probe with second oxygen probe, read biogas flow and air mass flow respectively, read dissolved oxygen DO (DO) concentration by dissolved oxygen probe by biogas flowmeter and air flowmeter.When sulfuretted hydrogen is popped one's head in detected concentration of hydrogen sulfide above alarm threshold value (20mg/m
3) time, the sulfuretted hydrogen alarm starts reports to the police, and closes biogas and effluxes automatic regulating valve, and close biogas air inlet automatic modulation valve and air inlet automatic regulating valve simultaneously; When sulfuretted hydrogen is popped one's head in detected concentration of hydrogen sulfide less than 20mg/m
3The time, the sulfuretted hydrogen alarm cuts out warning, opens biogas and effluxes automatic regulating valve; When sulfuretted hydrogen is popped one's head in detected concentration of hydrogen sulfide greater than regulating threshold value 1 (10mg/m
3) time, suitably reduce biogas air inlet automatic regulating valve; When sulfuretted hydrogen is popped one's head in detected concentration of hydrogen sulfide less than regulating threshold value 2 (5mg/m
3) time, suitably increase biogas air inlet automatic regulating valve.When the oxygen content that records when first oxygen probe surpassed alarm threshold value (1.0%), the first oxygen alarm was opened and is reported to the police, and the oxygen content that records until first oxygen probe stops to report to the police less than 1.0%, the first oxygen alarm.When the oxygen content that records when second oxygen probe surpasses alarm threshold value (1.0%), the second oxygen alarm is opened and is reported to the police, and close biogas and efflux automatic regulating valve, the oxygen content that records until second oxygen probe is less than 1.0%, the second oxygen alarm stops to report to the police, and unlatching biogas effluxes automatic regulating valve.The dissolved oxygen concentration that records when dissolved oxygen probe surpasses when regulating threshold value 1 (0.1mg/L), reduces the air inlet automatic regulating valve; The dissolved oxygen concentration that records when dissolved oxygen probe strengthens the air automatic regulating valve when regulating threshold value 2 (0.5mg/L).
The biogas desulfurization automation control method that detects based on methane, sulfuretted hydrogen and oxygen content is: by the content of dissolved oxygen DO in the liquid phase in the dissolved oxygen probe 7 real-time monitoring biogas desulfurization reaction zones, and adjust the charge flow rate and the ratio of methane and air according to data collection and analysis regulation device 8 control air inlet automatic regulating valves 2 and biogas air inlet automatic regulating valve 3, the concentration of biogas desulfurization reaction zone liquid phase part dissolved oxygen DO is maintained between 0.05～0.10mg/L; Monitor the content of oxygen in the biogas desulfurization reaction zone in real time by first oxygen probe 5, make in the biogas desulfurization reaction zone in the gas phase oxygen volume percent content less than 1.0%, if the oxygen volume percent content is greater than 1.0% in the biogas desulfurization reaction zone, the first oxygen alarm 6 sends warning, data collection and analysis regulation device 8 will further be controlled the charge flow rate and the ratio of air inlet automatic regulating valve 2 and biogas air inlet automatic regulating valve 3 adjustment methane and air, make in the biogas desulfurization reaction zone gas phase oxygen volume percent content stop to report to the police less than 1.0%, the first oxygen alarm 6; By the hydrogen sulfide content in the sulfuretted hydrogen probe 10 mensuration firedamp drainage district gas content detection systems, set detected hydrogen sulfide content greater than 20mg/m
3, sulfuretted hydrogen alarm 9 sends warning, make biogas efflux automatic regulating valve 12 by data collection and analysis regulation device 8 and be in closed condition, and the air inflow of biogas in the regulation and control biogas desulfurization reaction zone, until firedamp drainage hydrogen sulfide content that the district surveys less than 20mg/m
3, sulfuretted hydrogen alarm 9 stops to report to the police; By the oxygen content in second oxygen probe, the 11 mensuration firedamp drainage district gas content detection systems, set detected oxygen content greater than 1.0%, the second oxygen alarm 13 sends warning, make biogas efflux automatic regulating valve 12 by data collection and analysis regulation device 8 and be in closed condition, and the air inflow of the interior air of regulation and control biogas desulfurization reaction zone, until firedamp drainage district institute oxygen determination gas content less than 1.0%, the second oxygen alarm 13 stops to report to the police, when sulfuretted hydrogen alarm 9 and the second oxygen alarm 13 all do not send when reporting to the police, data collection and analysis regulation device 8 control biogas efflux automatic regulating valve 12 and are in open mode, and biogas is effluxed.
Claims (2)
1. one kind based on methane, the biogas desulfurization automation control system that sulfuretted hydrogen and oxygen content detect, it is characterized in that comprising biogas desulfurization reaction zone gas content control system and firedamp drainage district gas content detection system, biogas desulfurization reaction zone gas content control system comprises air gas flowmeter (1), air inlet automatic regulating valve (2), biogas air inlet automatic regulating valve (3), biogas flowmeter (4), first oxygen probe (5), the first oxygen alarm (6), dissolved oxygen probe (7) and data collection and analysis regulation device (8), air gas flowmeter (1) links to each other with the biogas desulfurization reaction zone through air inlet automatic regulating valve (2), biogas flowmeter (4) links to each other with the biogas desulfurization reaction zone through biogas air inlet automatic regulating valve (3), be provided with first oxygen probe (5) and dissolved oxygen probe (7) in the biogas desulfurization reaction zone, the first oxygen alarm (6) one ends and first oxygen pop one's head in (5) link to each other, firedamp drainage district gas content detection system comprises sulfuretted hydrogen alarm (9), sulfuretted hydrogen probe (10), second oxygen probe (11), biogas effluxes the automatic regulating valve (12) and the second oxygen alarm (13), be provided with sulfuretted hydrogen probe (10) in the firedamp drainage district, second oxygen probe (11), sulfuretted hydrogen alarm (9) one ends link to each other with sulfuretted hydrogen probe (10), the second oxygen alarm (13) one ends and second oxygen pop one's head in (11) link to each other, biogas effluxes automatic regulating valve (12) one ends and links to each other with the firedamp drainage district, the firedamp drainage district links to each other with the biogas desulfurization reaction zone, data collection and analysis regulation device (8) respectively with first oxygen alarm (6) other end, sulfuretted hydrogen alarm (9) other end, second oxygen alarm (13) other end, air inlet automatic regulating valve (2), biogas air inlet automatic regulating valve (3), dissolved oxygen probe (7) effluxes automatic regulating valve (12) with biogas and links to each other.
2. a kind of biogas desulfurization automation control system that detects based on methane, sulfuretted hydrogen and oxygen content according to claim 1, the internal mode annexation that it is characterized in that described data collection and analysis regulation device is: main control processor is connected with digital quantity input module with analog quantity load module, switching value input conditioning module, the unlimited communication module of sensor, power circuit, electric control valve control module, digital quantity output module respectively, and the unlimited communication module of sensor is connected with sensor power supply interface, power circuit and electric control valve control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202955739U CN201788380U (en) | 2010-08-17 | 2010-08-17 | Biogas desulfurization automatic control system for detecting contents of methane, sulfurated hydrogen and oxygen |
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| CN2010202955739U CN201788380U (en) | 2010-08-17 | 2010-08-17 | Biogas desulfurization automatic control system for detecting contents of methane, sulfurated hydrogen and oxygen |
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| CN201788380U true CN201788380U (en) | 2011-04-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004452A (en) * | 2010-08-17 | 2011-04-06 | 浙江大学 | Biogas-desulphurizing automatic control system and method based on detection of methane, hydrogen sulfide and oxygen gas contents |
| CN111954567A (en) * | 2018-03-06 | 2020-11-17 | 三菱动力株式会社 | Operation support system and operation support method for desulfurization device |
-
2010
- 2010-08-17 CN CN2010202955739U patent/CN201788380U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004452A (en) * | 2010-08-17 | 2011-04-06 | 浙江大学 | Biogas-desulphurizing automatic control system and method based on detection of methane, hydrogen sulfide and oxygen gas contents |
| CN102004452B (en) * | 2010-08-17 | 2012-05-30 | 浙江大学 | Biogas-desulphurizing automatic control system and method based on detection of methane, hydrogen sulfide and oxygen gas contents |
| CN111954567A (en) * | 2018-03-06 | 2020-11-17 | 三菱动力株式会社 | Operation support system and operation support method for desulfurization device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110406 Effective date of abandoning: 20120530 |