CN103451092A - Biogas digester capable of utilizing boiler blow-off waste heat - Google Patents
Biogas digester capable of utilizing boiler blow-off waste heat Download PDFInfo
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- CN103451092A CN103451092A CN2013103695686A CN201310369568A CN103451092A CN 103451092 A CN103451092 A CN 103451092A CN 2013103695686 A CN2013103695686 A CN 2013103695686A CN 201310369568 A CN201310369568 A CN 201310369568A CN 103451092 A CN103451092 A CN 103451092A
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- methane
- generating pit
- storage tank
- boiler
- water storage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention discloses a biogas digester capable of utilizing boiler blow-off waste heat, belonging to the technical field of new energy utilization. The biogas digester is heated up by utilizing blow-off hot water of a power station boiler, and the biogas digester is stabilized at an appropriate production temperature by controlling blow-off hot water amount introduced into a heater, such problems of the biogas digester as a low gas generation rate in winter and the like are overcome, and the high yield of the biogas digester is ensured. Meanwhile, the heat of boiler wastewater is utilized, so that the production efficiency of the boiler is improved. Biogas produced by the biogas digester not only can be supplied to residents, but also can be fed to the boiler to be burnt, so that fossil energy is saved, and the effect of saving energy and reducing emission is achieved.
Description
Technical field
The invention belongs to the new energy use technology field, particularly a kind of methane-generating pit that utilizes draining of boiler used heat.
Background technology
Biogas is organic substance under certain temperature, wet condition, a kind of inflammable gas produced through the fermentative action of microorganism.The major ingredient of biogas is that methane, carbonic acid gas and hydrogen sulfide are arranged, and also has a small amount of ammonia, nitrogen, hydrogen, carbon monoxide and suspended particle.Temperature is a key factor of biogas fermentation, and the height of biogas fermentation speed depends on temperature to a great extent.In certain temperature range, temperature is higher, and aerogenesis speed is also higher, and this is because the Metabolic activity of biogas microorganism is more vigorous with the rising of temperature.
Station boiler blowdown hot water (as drum continuous blowdown and periodic blow down), because its recycling economy is not high, directly enters trench after generally entering hydrophobic development unit, has caused certain wasting of resources.The present invention combines draining of boiler waste heat utilization technology and biogas production technology, and a kind of save energy is provided, cheap, environmentally friendly methane-generating pit.
Summary of the invention:
The present invention combines draining of boiler waste heat utilization technology and biogas production technology, and a kind of methane-generating pit of efficient multi-purpose is provided.
The technical solution used in the present invention is:
A kind of methane-generating pit that utilizes draining of boiler used heat, described biomass pool structure is as follows: well heater 3 is set in methane-generating pit 7; Well heater 3 is connected with water storage tank 1 by calorifier inlets flow control valve 2, by heater outlet flow control valve 4, with device for recycling sewage 5, be connected, the biogas of methane-generating pit 7 divides the two-way circulation, after a road drying device and compressor, enters civilian gas-holder, then leads to the resident; Another road drying device, CO
2enter the station-service gas-holder after removing device and compressor.
Described methane-generating pit 7 is equipped with stirrer 6 in the calorifier inlets side.
Described water storage tank 1 has water tank bottom wicket 8, and it is relative with trench 9.
Described methane-generating pit 7 is imbedded underground, and water storage tank 1 is arranged on overhead height 3-5m place.
Described well heater 3 is spliced for U-shaped duct segments, horizontally disposed or vertically be arranged in methane-generating pit 7.
The water temperature of described water storage tank (1) is controlled as 60-200 ℃.
The temperature range that enters the draining of boiler hot water of water storage tank (1) is 40-400 ℃.
Beneficial effect of the present invention is: the present invention utilizes boiler of power plant blowdown waste heating methane-generating pit, control by the aperture of regulating methane-generating pit calorifier inlets variable valve the blowdown hot water amount who introduces well heater, make temperature-stable in methane-generating pit the production temperature of 45-65 ℃, guaranteed the high yield of methane-generating pit, utilized the heat of blowdown water simultaneously, improve the production efficiency of boiler, be conducive to energy-saving and emission-reduction.
The accompanying drawing explanation:
Fig. 1 is the structural representation of the methane-generating pit that proposes of the present invention;
Fig. 2 is the methane-generating pit biogas utilization schematic flow sheet that the present invention proposes.
Number in the figure: 1-water storage tank; 2-calorifier inlets flow control valve, the 3-well heater; 4-heater outlet flow control valve; The 5-device for recycling sewage; The 6-stirrer; The 7-methane-generating pit; 8-water tank bottom wicket; The 9-trench; The 10-drying installation; The 11-compressor; The civilian gas-holder of 12-; The 13-resident; The 14-CO2 absorption unit; 15-station-service gas-holder; 16-power plant uses the gas user.
Embodiment:
Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:
Biomass pool structure as shown in Figure 1 is as follows: well heater 3 is set in methane-generating pit 7; Well heater 3 is connected with water storage tank 1 by calorifier inlets flow control valve 2, by heater outlet flow control valve 4, with device for recycling sewage 5, be connected, the biogas of methane-generating pit 7 divides the two-way circulation, after a road drying device and compressor, enters civilian gas-holder, then leads to the resident; Another road drying device, CO
2enter the station-service gas-holder after removing device and compressor, as shown in Figure 2.
Methane-generating pit 7 is equipped with stirrer 6 in the calorifier inlets side.Water storage tank 1 has water tank bottom wicket 8, and it is relative with trench 9.Methane-generating pit 7 is imbedded underground, and water storage tank 1 is arranged on overhead height 3-5m place.Well heater 3 is spliced for U-shaped duct segments, horizontally disposed or vertically be arranged in methane-generating pit 7.
By draining of boiler hot water, its temperature range is 40-400 ℃, first enters in water storage tank 1, by adjusting, enters the water amount of blowdown under differing temps in water storage tank, and the interior water temperature of water storage tank 1 is controlled between 60-200 ℃.
Blowdown hot water flows out and enters well heater 3 by calorifier inlets flow control valve 2 from water storage tank 1, enter device for recycling sewage 5 with the heat exchange of methane-generating pit fermented liquid by heater outlet flow control valve 4 in well heater 3, control by the aperture of controlling inlet flow rate variable valve 2 hot water amount who enters well heater 3, make the temperature of methane-generating pit maintain 45-60 ℃.
Blowdown hot water inflow side at methane-generating pit 7 is equipped with stirrer 6, can make fermented liquid be heated evenly, and prevents that local temperature is too high.
Methane-generating pit 7 internal heaters 3 adopt U-shaped pipeline to be spliced, and can horizontally disposed or vertically be arranged in methane-generating pit, and its material adopts corrosion resistant material (as concrete placement forms), is easy to safeguard and maintenance.This device utilizes siphon principle that the power of blowdown hot water flow is provided, and without adopting extra power set, has saved the energy and cost.
Biogas in methane-generating pit divides the two-way circulation, after a road drying device and compressor, enters civilian gas-holder, then leads to the resident; Another road drying device, CO
2enter the station-service gas-holder after removing device and compressor, but boiler of feeding burning gas.
Embodiment 1
As depicted in figs. 1 and 2, determine the volume of methane-generating pit, water storage tank, civilian gas-holder, station-service gas-holder, pipe number and the interior circulation area of pipe of well heater according to design requirements.
Methane-generating pit is imbedded underground, is provided with well heater in methane-generating pit, on methane-generating pit, overhead highly for 4m, is provided with retention basin.
Draining of boiler hot water first enters in water storage tank, by adjusting, enters the water amount of blowdown under differing temps in water storage tank, and water temperature in water storage tank is controlled between 60-200 ℃.
Blowdown hot water flows out and enters well heater by the calorifier inlets flow control valve from water storage tank, enter device for recycling sewage with the heat exchange of methane-generating pit fermented liquid by the heater outlet flow control valve in well heater, control by the aperture of controlling the inlet flow rate variable valve hot water amount who enters well heater, make the temperature of methane-generating pit maintain 50 ℃.
Blowdown hot water inflow side at methane-generating pit is equipped with whipping appts, can make fermented liquid be heated evenly, and prevents that local temperature is too high.
The methane-generating pit internal heater adopts U-shaped pipeline to be spliced, and vertically is arranged in methane-generating pit, and its material adopts concrete placement to form, and is easy to safeguard and maintenance.This device utilizes siphon principle that the power of blowdown hot water flow is provided, without adopting extra power set.
Biogas in methane-generating pit divides the two-way circulation, after a road drying device and compressor, enters civilian gas-holder, then leads to the resident; Another road drying device, CO
2enter the station-service gas-holder after removing device and compressor, but boiler of feeding burning gas, CO
2remove device, its CO
2removing agent is CaO.
Claims (7)
1. a methane-generating pit that utilizes draining of boiler used heat, is characterized in that, described biomass pool structure is as follows: well heater (3) is set in methane-generating pit (7); Well heater (3) is connected with water storage tank (1) by calorifier inlets flow control valve (2), by heater outlet flow control valve (4), with device for recycling sewage (5), be connected, the biogas of methane-generating pit (7) divides the two-way circulation, enter civilian gas-holder after one tunnel drying device and compressor, then lead to the resident; Another road drying device, CO
2enter the station-service gas-holder after removing device and compressor.
2. methane-generating pit according to claim 1, is characterized in that, described methane-generating pit (7) is equipped with stirrer (6) in the calorifier inlets side.
3. methane-generating pit according to claim 1, is characterized in that, described water storage tank (1) has water tank bottom wicket (8), and it is relative with trench (9).
4. methane-generating pit according to claim 1, is characterized in that, described methane-generating pit (7) is imbedded underground, and water storage tank (1) is arranged on overhead height 3-5m place.
5. methane-generating pit according to claim 1, is characterized in that, described well heater (3) is spliced for U-shaped duct segments, horizontally disposed or vertically be arranged in methane-generating pit (7).
6. methane-generating pit according to claim 1, is characterized in that, the water temperature of described water storage tank (1) is controlled as 60-200 ℃.
7. methane-generating pit according to claim 1, is characterized in that, the temperature range that enters the draining of boiler hot water of water storage tank (1) is 40-400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103695686A CN103451092A (en) | 2013-08-22 | 2013-08-22 | Biogas digester capable of utilizing boiler blow-off waste heat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103695686A CN103451092A (en) | 2013-08-22 | 2013-08-22 | Biogas digester capable of utilizing boiler blow-off waste heat |
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| CN103451092A true CN103451092A (en) | 2013-12-18 |
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| CN2013103695686A Pending CN103451092A (en) | 2013-08-22 | 2013-08-22 | Biogas digester capable of utilizing boiler blow-off waste heat |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2921026Y (en) * | 2006-01-27 | 2007-07-11 | 黄鸣 | Solar energy methane generator |
| CN201010644Y (en) * | 2006-12-01 | 2008-01-23 | 长安大学 | Solar biogas generating pit |
| CN201183793Y (en) * | 2008-03-05 | 2009-01-21 | 吉林建筑工程学院 | Methane boiler heating methane tank |
| CN201962283U (en) * | 2011-04-06 | 2011-09-07 | 昆明天开农业设施有限公司 | Solar kitchen garbage processing system |
-
2013
- 2013-08-22 CN CN2013103695686A patent/CN103451092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2921026Y (en) * | 2006-01-27 | 2007-07-11 | 黄鸣 | Solar energy methane generator |
| CN201010644Y (en) * | 2006-12-01 | 2008-01-23 | 长安大学 | Solar biogas generating pit |
| CN201183793Y (en) * | 2008-03-05 | 2009-01-21 | 吉林建筑工程学院 | Methane boiler heating methane tank |
| CN201962283U (en) * | 2011-04-06 | 2011-09-07 | 昆明天开农业设施有限公司 | Solar kitchen garbage processing system |
Non-Patent Citations (1)
| Title |
|---|
| 江皓等: "沼气净化提纯制生物甲烷技术与应用", 《中国沼气》, vol. 30, no. 2, 31 December 2012 (2012-12-31) * |
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Application publication date: 20131218 |