CN109401954A - Heat-exchange system and working method are heated outside biogas fermentation reactor - Google Patents
Heat-exchange system and working method are heated outside biogas fermentation reactor Download PDFInfo
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Abstract
The present invention relates to heat-exchange system and working method is heated outside biogas fermentation reactor, belong to methane engineering technology field.The present invention is that the existing biogas project fermentation reactor heating method heat exchange efficiency of solution is low, the big problem of thermal losses, it provides and heats heat-exchange system, including fermentor reactor, heat exchanger, heater, biogas slurry circulation line, heat cycles pipeline, heating agent circulation line outside a kind of biogas fermentation reactor；Liquid heat medium enters the endotherm section of heating agent circulation line, absorbs the heat of vaporization of heat cycles pipeline under the action of negative pressure into gas；Gas heating agent enters the heat release section of heating agent circulation line and liquefies at positive pressure, and biogas slurry absorbs the heat completion discharged when the liquefaction of gas heating agent and heats.Biogas slurry is led to outside tank and is heated, increase heat exchange contact area, promote the response speed that heats of biogas slurry, heat exchange efficiency is higher than traditional interior heat transfer form as heat exchange medium by heat absorption and heat release when using heating agent physical state variation occurs for the present invention.
Description
Technical field
The invention belongs to heat heat-exchange system and work outside methane engineering technology field more particularly to biogas fermentation reactor
Make method.
Background technique
Biogas integrates environmental benefit and economic benefit as a kind of clean biomass energy, and development and utilization are
Solve the problems, such as effective behave of energy supply under energy shortage situation.Biogas is that organic substance is micro- by anaerobism under preference temperature
What the fermentation of biology generated, temperature is the key factor of biogas fermentation.Fermentation temperature is low, then the activity of anaerobe
It is low, engineering operation low efficiency is caused, thus source benefit is also low.
For the normal fermentation production for guaranteeing biogas, fermentation temperature must be stablized in a certain range.Especially in winter or night
Between, to maintain biogas fermentation preference temperature, need to carry out biogas slurry to heat processing.Currently, biogas project fermentation reactor is main
It heats, exchanges heat using in fermentation tank or to biogas slurry in heating fermentor by the way of fermentor lateral wall setting heating coil
Low efficiency, thermal losses are big.
Summary of the invention
Low, the big problem of thermal losses, the present invention for the existing biogas project fermentation reactor heating method heat exchange efficiency of solution
It provides and heats heat-exchange system and working method outside a kind of biogas fermentation reactor.
Technical solution of the present invention:
Heat-exchange system, including fermentor reactor, heat exchanger and heater are heated outside biogas fermentation reactor；
The fermentor reactor tank be externally provided with its internal biogas slurry circulation line being connected to, on the biogas slurry circulation line
Equipped with the first valve, the second valve and biogas slurry circulating pump；
The heater and heat cycles pipeline connection, the heat cycles pipeline are equipped with third valve, the 4th valve
It is pumped with heat cycles；
Heating agent circulation line is equipped in the heat exchanger；
Condenser, the heat release of the heat exchanging segment and heating agent circulation line of the biogas slurry circulation line are additionally provided in the heat exchanger
Duan Gongtong is fixedly installed in condenser；
Evaporator, the heating of the endotherm section and heat cycles pipeline of the heating agent circulation line are additionally provided in the heat exchanger
Duan Gongtong is fixedly installed in evaporator；
The heat release section of the heating agent circulation line is equipped with heat release inlet valve and heat release flowing water Valve, the heating agent circulation pipe
The endotherm section on road is equipped with heat absorption inlet valve and heat absorption flowing water Valve；
Blower is equipped between the heat release inlet valve and heat absorption flowing water Valve；
Heating agent surge tank, the heating agent surge tank and heating agent are equipped between the heat release flowing water Valve and heat absorption inlet valve
Circulation line connection.
Further, upper liquid level sensor and lower liquid level sensor are equipped in the heating agent surge tank, the upper liquid level passes
Sensor is connected with controller, the unlatching of control heat release inlet valve, absorb heat flowing water Valve and blower；The lower liquid level sensor with
Controller is connected, the closing of control heat release flowing water Valve and the inlet valve that absorbs heat.
Further, fluid infusion sensor and fluid injection valve are additionally provided in the heating agent surge tank.
Further, the heater is solar heater or boiler heater.
The working method of heat-exchange system is heated outside biogas fermentation reactor provided by the invention:
Open third valve, the 4th valve and the heat cycles pump on heat cycles pipeline, the hot water for generating heater
It is flowed in heat cycles pipeline；
The first valve, the second valve and the biogas slurry circulating pump on biogas slurry circulation line are opened, makes biogas slurry in biogas slurry circulation pipe
It is flowed in road；
Open heat release inlet valve, heat release flowing water Valve, heat absorption inlet valve, the heat absorption outlet valve on heating agent circulation line
Door and blower, under fan action, the liquid heat medium in heating agent surge tank enters the endotherm section of heating agent circulation line in evaporator,
When the liquid level of liquid heat medium in heating agent surge tank drops to certain position, heat release flowing water Valve and heat absorption inlet valve are closed,
At this time under the action of blower, heating agent circulation line endotherm section initially forms negative pressure in evaporator, and liquid heat medium is in suction function
The lower heat of vaporization for absorbing hot water in heat cycles pipeline heating section forms the gas heating agent for carrying heat at gas；
Gas heating agent in heating agent circulation line endotherm section enters heating agent circulation line in condenser under fan action
Heat release section, the gas heating agent in heat release section occur to liquefy and release heat, biogas slurry circulation under the positive pressure that blower generates
Biogas slurry in pipeline heat exchanging segment absorbs the heat completion discharged when the liquefaction of gas heating agent and heats.
Further, the heat release section of gas heating agent heating agent circulation line in condenser, which occurs to liquefy, is condensed into liquid
After heating agent, heat release inlet valve, heat absorption flowing water Valve and blower are closed, heat release flowing water Valve and heat absorption inlet valve is opened, makes
Liquid heat medium flows back in heating agent surge tank, continue with heating agent carried out in evaporator and condenser heat absorption and it is exothermic circulation be
Biogas slurry heats.
Further, the heating agent is the novel carbon-hydrogen refrigerant of R433b.
Further, upper liquid level sensor and lower liquid level sensor are equipped in the heating agent surge tank, the upper liquid level passes
Sensor is connected with controller, the unlatching of control heat release inlet valve, absorb heat flowing water Valve and blower；Lower liquid level sensor and control
Device is connected, the closing of control heat release flowing water Valve and the inlet valve that absorbs heat,
Open heat release inlet valve, heat release flowing water Valve, heat absorption inlet valve, the heat absorption outlet valve on heating agent circulation line
Door and blower, under fan action, the liquid heat medium in heating agent surge tank enters the endotherm section of heating agent circulation line in evaporator,
When the liquid level of liquid heat medium in heating agent surge tank drops to lower liquid level sensor position, lower liquid level sensor is to controller
Signal is issued, heat release flowing water Valve and heat absorption inlet valve are closed；At this time under the action of blower, heating agent is recycled in evaporator
Pipeline endotherm section initially forms negative pressure, and liquid heat medium absorbs the heat of hot water in heat cycles pipeline heating section under the action of negative pressure
Gas is flashed to, the gas heating agent for carrying heat is formed；
Gas heating agent in heating agent circulation line endotherm section enters heating agent circulation line in condenser under fan action
Heat release section, the gas heating agent in heat release section occur to liquefy and release heat, biogas slurry circulation under the positive pressure that blower generates
Biogas slurry in pipeline heat exchanging segment absorbs the heat completion discharged when the liquefaction of gas heating agent and heats；
After the heat release section generation liquefaction of gas heating agent heating agent circulation line in condenser is condensed into liquid heat medium, closing is put
Hot inlet valve, heat absorption flowing water Valve and blower open heat release flowing water Valve and heat absorption inlet valve, liquid heat medium are made to flow back to heat
In matchmaker's surge tank, when heating agent buffering pot liquid rises to upper liquid level sensor position, upper liquid level sensor is to control
Device issues signal, opens heat release inlet valve, heat absorption flowing water Valve and blower on heating agent circulation line, continues with heating agent and exist
Heat absorption is carried out in evaporator and condenser and exothermic circulation heats for biogas slurry.
Further, it is additionally provided with fluid infusion sensor and fluid injection valve on the heating agent surge tank, when the liquid level of liquid heat medium
When lower than fluid infusion sensor, fluid infusion sensor issues signal to controller, prompts to open fluid injection valve after-teeming heating agent.
Beneficial effects of the present invention:
The present invention occurred under pressure using heating agent physical state variation when heat absorption and heat release as exchange heat medium,
Biogas slurry in fermentor reactor is led to outside fermentor and is heated, increases heat exchange contact area, promotes heating for biogas slurry
Response speed, heat exchange efficiency are higher than traditional interior heat transfer form.Meanwhile the outer loop of biogas slurry can also play certain stirring and make
With facilitating uniformly transferring for the combined inoculation of biogas slurry and temperature in fermentor reactor.
Detailed description of the invention
Fig. 1 is to heat heat-exchange system structural schematic diagram outside biogas fermentation reactor of the present invention.
Specific embodiment
Below with reference to embodiment, the following further describes the technical solution of the present invention, and however, it is not limited to this, all right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be contained
Lid is within the protection scope of the present invention.
Embodiment 1
Heat-exchange system, including fermentor reactor 1, heat exchanger 2 and heater 3 are heated outside biogas fermentation reactor；
1 tank of fermentor reactor is externally provided with and its internal biogas slurry circulation line 4 being connected to, the biogas slurry circulation line
4 are equipped with the first valve 401, the second valve 402 and biogas slurry circulating pump 403；
The heater 3 is connected to heat cycles pipeline 6, and the heat cycles pipeline 6 is equipped with third valve 601, the
Four valves 602 and heat cycles pump 603；
Heating agent circulation line 5 is equipped in heat exchanger 2；
Condenser 7, the heat exchanging segment 41 of biogas slurry circulation line 4 and the heat release section of heating agent circulation line 5 are additionally provided in heat exchanger 2
51 are fixedly installed on jointly in condenser 7；
Evaporator 8, the endotherm section 52 of heating agent circulation line 5 and the bringing-up section of heat cycles pipeline 6 are additionally provided in heat exchanger 2
61 are fixedly installed on jointly in evaporator 8；
The heat release section 51 of heating agent circulation line 5 is equipped with heat release inlet valve 501 and heat release flowing water Valve 502, heating agent circulation
The endotherm section 52 of pipeline 5 is equipped with heat absorption inlet valve 503 and heat absorption flowing water Valve 504；
Blower 505 is equipped between heat release inlet valve 501 and heat absorption flowing water Valve 504；
Heating agent surge tank 9, heating agent surge tank 9 and heating agent are equipped between heat release flowing water Valve 502 and heat absorption inlet valve 503
Circulation line 5 is connected to.
Heat-exchange system is heated outside biogas fermentation reactor provided in this embodiment to draw the biogas slurry in fermentor reactor
It carries out heat exchange outside to fermentor out to heat, increases heat exchange contact area, promote the response speed that heats of biogas slurry, heat exchange efficiency is higher than
Traditional interior heat transfer form.The outer loop of biogas slurry can also play certain stirring action, facilitate natural pond in fermentor reactor
The combined inoculation of liquid and uniformly transferring for temperature.
Embodiment 2
The present embodiment on the basis of embodiment 1, is equipped with upper liquid level sensor 901 and lower liquid level in heating agent surge tank 9
Sensor 902, the liquid level sensor 901, lower liquid level sensor 902 are connected with controller respectively, the upper liquid level sensor
901 are connected with controller, the unlatching of control heat release inlet valve 501, absorb heat flowing water Valve 504 and blower 505；The lower liquid level
Sensor 902 is connected with controller, the closing of control heat release flowing water Valve 502 and the inlet valve 503 that absorbs heat.
Liquid level sensor used in the present embodiment is floating ball type liquid level sensor, controller model Siemens S7-
200SMART controller.
It is upper by what is be arranged in heating agent surge tank that heat-exchange system is heated outside biogas fermentation reactor provided in this embodiment
Liquid level sensor, lower liquid level sensor are connected with controller, corresponding by liquid heat medium liquid level variation control in heating agent surge tank
The automatic switch of valve realizes that biogas slurry heats the automation control of heat-exchange system.
Embodiment 3
The present embodiment is additionally provided with fluid infusion sensor 903 and liquid-filling valve on the basis of embodiment 2 in heating agent surge tank 9
Door 904.Fluid infusion sensor used in the present embodiment is floating ball type liquid level sensor.
Heat-exchange system is heated outside biogas fermentation reactor provided in this embodiment passes through the benefit of setting in heating agent surge tank
Liquid sensor realizes the monitoring to liquid heat medium reserves in heating agent surge tank, plays a protective role, maintains the continuous-stable of biogas slurry
The gain of heat.
Embodiment 4
For the present embodiment based on embodiment 3, the heater 3 used is solar heater or boiler heater.
Embodiment 5
The working method of heat-exchange system is heated outside the biogas fermentation reactor that embodiment 1 provides:
Third valve 601, the 4th valve 602 and the heat cycles pump 603 on heat cycles pipeline 6 are opened, heater 3 is made
The hot water of generation flows in heat cycles pipeline 6；
The first valve 401, the second valve 402 and the biogas slurry circulating pump 403 on biogas slurry circulation line 4 are opened, biogas slurry is made to exist
Flowing in biogas slurry circulation line 4；
Open heating agent circulation line 5 on heat release inlet valve 501, heat release flowing water Valve 502, heat absorption inlet valve 503,
Absorb heat flowing water Valve 504 and blower 505, and under fan action, the liquid heat medium in heating agent surge tank 9 enters hot in evaporator 8
The endotherm section 52 of matchmaker's circulation line 5 closes heat release when the liquid level of liquid heat medium in heating agent surge tank 9 drops to certain position
Flowing water Valve 502 and heat absorption inlet valve 503, at this time under the action of blower 505, heating agent circulation line 5 absorbs heat in evaporator 8
Section 52 initially forms negative pressure, and the heat that liquid heat medium absorbs hot water in 6 bringing-up section 61 of heat cycles pipeline under the action of negative pressure steams
Gas is sent out into, the gas heating agent for carrying heat is formed；
Gas heating agent in 5 endotherm section 52 of heating agent circulation line enters heating agent circulation in condenser 7 under the effect of blower 505
The heat release section 51 of pipeline 5, the gas heating agent in heat release section 51 occur to liquefy and release under the positive pressure that blower 505 generates
Heat, the biogas slurry in 4 heat exchanging segment 41 of biogas slurry circulation line absorb the heat completion discharged when the liquefaction of gas heating agent and heat.
The present embodiment occurred under pressure using heating agent physical state variation when heat absorption and heat release as exchange heat matchmaker
Be situated between, by heater generate heat efficiently conduct to biogas slurry, and and biogas slurry complete to exchange heat outside fermentor.In traditional zymotic tank
Heating or tank skin heating method are compared, and biogas slurry is led to outside tank and increases heat exchange contact area by the present embodiment, promote biogas slurry
Response speed is heated, heat exchange efficiency is higher.
Embodiment 6
Heat-exchange system is heated outside biogas fermentation reactor, and circulation gain of heat working method is completed on the basis of embodiment 5:
After the completion of 5 biogas slurry of embodiment heats, liquid occurs for the heat release section 51 of gas heating agent heating agent circulation line 5 in condenser
After change is condensed into liquid heat medium, heat release inlet valve 501, heat absorption flowing water Valve 504 and blower 505 are closed, opens heat release water outlet
Valve 502 and heat absorption inlet valve 503, make liquid heat medium flow back to the endotherm section 52 of heating agent surge tank 9 and heating agent circulation line 5
Interior, that continues embodiment 5 heats process, continual can be absorbed heat and be put in evaporator and condenser using heating agent
The circulation of heat heats for biogas slurry.
Embodiment 7
The working method of heat-exchange system and the difference of embodiment 5 are heated outside biogas fermentation reactor provided in this embodiment
It is, the heating agent that the present embodiment uses is the novel carbon-hydrogen refrigerant of R433b, itself low boiling point, easily evaporation, in evaporator
Under negative pressure and heating condition, it is easier to flash to gas rapidly, evaporation process can absorb ambient heat；Positive pressure in condenser
Under the conditions of, it can be liquefied as liquid rapidly, while discharging heat to surrounding.
Embodiment 8
The working method of heat-exchange system and the difference of embodiment 5 are heated outside biogas fermentation reactor provided in this embodiment
It is, upper liquid level sensor 901 and lower liquid level sensor 902, the upper level sensing is equipped in the present embodiment heating agent surge tank 9
Device 901 is connected with controller, the unlatching of control heat release inlet valve 501, absorb heat flowing water Valve 504 and blower 505；Lower liquid level passes
Sensor 902 is connected with controller, the closing of control heat release flowing water Valve 502 and the inlet valve 503 that absorbs heat,
Open heating agent circulation line 5 on heat release inlet valve 501, heat release flowing water Valve 502, heat absorption inlet valve 503,
Absorb heat flowing water Valve 504 and blower 505, and under fan action, the liquid heat medium in heating agent surge tank 9 enters heating agent in evaporator
The endotherm section 52 of circulation line 5, when the liquid level of liquid heat medium in heating agent surge tank 9 drops to lower 902 institute of liquid level sensor in place
When setting, lower liquid level sensor 902 issues signal to controller, and heat release flowing water Valve 502 and heat absorption inlet valve 503 are closed；
At this time under the action of blower 505,5 endotherm section 52 of heating agent circulation line initially forms negative pressure in evaporator 8, and liquid heat medium is negative
The lower heat of vaporization for absorbing hot water in 6 bringing-up section 61 of heat cycles pipeline of pressure effect forms the air heat for carrying heat at gas
Matchmaker；
Gas heating agent in 5 endotherm section 52 of heating agent circulation line enters heating agent circulation in condenser 7 under the effect of blower 505
The heat release section 51 of pipeline 5, the gas heating agent in heat release section 51 occur to liquefy and release under the positive pressure that blower 505 generates
Heat, the biogas slurry in 4 heat exchanging segment 41 of biogas slurry circulation line absorb the heat completion discharged when the liquefaction of gas heating agent and heat；
After the generation liquefaction of heat release section 51 of gas heating agent heating agent circulation line 5 in condenser 7 is condensed into liquid heat medium, close
Heat release inlet valve 501, heat absorption flowing water Valve 504 and blower 505 are closed, heat release flowing water Valve 502 and heat absorption inlet valve are opened
503, flow back to liquid heat medium in heating agent surge tank 9, where liquid rises to upper liquid level sensor 901 in heating agent surge tank 9
When position, upper liquid level sensor 901 to controller issue signal, open heating agent circulation line 5 on heat release inlet valve 501,
Absorb heat flowing water Valve 504 and blower 505, continues with that heating agent carries out heat absorption in evaporator and condenser and exothermic circulation is
Biogas slurry heats.
Meanwhile fluid infusion sensor 903 and fluid injection valve 904 are additionally provided on heating agent surge tank 9, when the liquid level of liquid heat medium is low
When fluid infusion sensor 903, fluid infusion sensor 903 issues signal to controller, prompts to open 904 after-teeming heating agent of fluid injection valve.
The present embodiment realizes natural pond by the automatic switch of liquid heat medium liquid level variation control respective valves in heating agent surge tank
Liquid heats the automation control of heat-exchange system；It is realized by the fluid infusion sensor being arranged in heating agent surge tank in heating agent surge tank
The monitoring of liquid heat medium reserves maintains the continuous-stable gain of heat of biogas slurry.
Claims (9)
1. heating heat-exchange system outside biogas fermentation reactor, which is characterized in that including fermentor reactor (1), heat exchanger (2)
With heater (3)；
Fermentor reactor (1) tank is externally provided with and its internal biogas slurry circulation line (4) being connected to, the biogas slurry circulation line
(4) the first valve (401), the second valve (402) and biogas slurry circulating pump (403) are equipped with；
The heater (3) is connected to heat cycles pipeline (6), and the heat cycles pipeline (6) is equipped with third valve
(601), the 4th valve (602) and heat cycles pump (603)；
Heating agent circulation line (5) are equipped in the heat exchanger (2)；
It is additionally provided with condenser (7) in the heat exchanger (2), the heat exchanging segment (41) and heating agent of the biogas slurry circulation line (4) recycle
The heat release section (51) of pipeline (5) is fixedly installed on jointly in condenser (7)；
It is additionally provided with evaporator (8) in the heat exchanger (2), the endotherm section (52) and heat cycles of the heating agent circulation line (5)
The bringing-up section (61) of pipeline (6) is fixedly installed on jointly in evaporator (8)；
The heat release section (51) of the heating agent circulation line (5) is equipped with heat release inlet valve (501) and heat release flowing water Valve (502),
The endotherm section (52) of the heating agent circulation line (5) is equipped with heat absorption inlet valve (503) and heat absorption flowing water Valve (504)；
Blower (505) are equipped between the heat release inlet valve (501) and heat absorption flowing water Valve (504)；
Heating agent surge tank (9) are equipped between the heat release flowing water Valve (502) and heat absorption inlet valve (503), the heating agent is slow
Tank (9) is rushed to be connected to heating agent circulation line (5).
2. heating heat-exchange system outside biogas fermentation reactor according to claim 1, which is characterized in that the heating agent buffering
Upper liquid level sensor (901) and lower liquid level sensor (902), the upper liquid level sensor (901) and controller are equipped in tank (9)
It is connected, control heat release inlet valve (501), the unlatching of absorb heat flowing water Valve (504) and blower (505)；The lower level sensing
Device (902) is connected with controller, controls the closing of heat release flowing water Valve (502) and heat absorption inlet valve (503).
3. heating heat-exchange system outside biogas fermentation reactor according to claim 1 or claim 2, which is characterized in that the heating agent
Fluid infusion sensor (903) and fluid injection valve (904) are additionally provided in surge tank (9).
4. heating heat-exchange system outside biogas fermentation reactor according to claim 3, which is characterized in that the heater
It (3) is solar heater or boiler heater.
5. heating the working method of heat-exchange system outside biogas fermentation reactor described in claim 1, which is characterized in that
Third valve (601), the 4th valve (602) and the heat cycles pump (603) on heat cycles pipeline (6) are opened, makes to add
The hot water that hot device (3) generates flowing in heat cycles pipeline (6)；
The first valve (401), the second valve (402) and the biogas slurry circulating pump (403) on biogas slurry circulation line (4) are opened, natural pond is made
Liquid flowing in biogas slurry circulation line (4)；
Open heat release inlet valve (501), heat release flowing water Valve (502), the heat absorption inlet valve on heating agent circulation line (5)
(503), absorb heat flowing water Valve (504) and blower (505), the liquid heat under blower (505) effect, in heating agent surge tank (9)
Matchmaker enters the endotherm section (52) of the interior heating agent circulation line (5) of evaporator (8), when the liquid level of heating agent surge tank (9) interior liquid heat medium
When dropping to certain position, heat release flowing water Valve (502) and heat absorption inlet valve (503) are closed, at this time in the work of blower (505)
Under, interior heating agent circulation line (5) endotherm section (52) of evaporator (8) initially forms negative pressure, and liquid heat medium is inhaled under the action of negative pressure
The heat of vaporization of heat cycles pipeline (6) bringing-up section (61) interior hot water is received into gas, forms the gas heating agent for carrying heat；
Gas heating agent in heating agent circulation line (5) endotherm section (52) enters condenser (7) interior heating agent under blower (505) effect
The heat release section (51) of circulation line (5), the gas heating agent in heat release section (51) occur under the positive pressure that blower (505) generates
It liquefies and releases heat, the biogas slurry in biogas slurry circulation line (4) heat exchanging segment (41) absorbs the heat discharged when the liquefaction of gas heating agent
Amount is completed to heat.
6. the working method of heat-exchange system is heated outside biogas fermentation reactor according to claim 5, which is characterized in that institute
Gas heating agent is stated after the heat release section (51) of the interior heating agent circulation line (5) of condenser (7) occurs to liquefy and is condensed into liquid heat medium, is closed
Heat release inlet valve (501), heat absorption flowing water Valve (504) and blower (505) are closed, heat release flowing water Valve (502) are opened and is absorbed heat
Inlet valve (503) flows back to liquid heat medium in heating agent surge tank (9), continue with heating agent in evaporator and condenser into
Row heat absorption and exothermic circulation heat for biogas slurry.
7. according to the working method for heating heat-exchange system outside the biogas fermentation reactor of claim 5 or 6, feature exists
In the heating agent is the novel carbon-hydrogen refrigerant of R433b.
8. the working method of heat-exchange system is heated outside biogas fermentation reactor according to claim 7, which is characterized in that institute
It states and is equipped with upper liquid level sensor (901) and lower liquid level sensor (902), the upper liquid level sensor in heating agent surge tank (9)
(901) it is connected with controller, control heat release inlet valve (501), the unlatching of absorb heat flowing water Valve (504) and blower (505)；Under
Liquid level sensor (902) is connected with controller, controls the closing of heat release flowing water Valve (502) and heat absorption inlet valve (503),
Open heat release inlet valve (501), heat release flowing water Valve (502), the heat absorption inlet valve on heating agent circulation line (5)
(503), absorb heat flowing water Valve (504) and blower (505), and under fan action, the liquid heat medium in heating agent surge tank (9) enters
The endotherm section (52) of heating agent circulation line (5) in evaporator, when the liquid level of heating agent surge tank (9) interior liquid heat medium drops to lower liquid
When level sensor (902) position, lower liquid level sensor (902) issues signal to controller, by heat release flowing water Valve (502)
It is closed with heat absorption inlet valve (503)；At this time under the action of blower (505), the interior heating agent circulation line (5) of evaporator (8) is inhaled
Hot arc (52) initially forms negative pressure, and liquid heat medium absorbs heat cycles pipeline (6) bringing-up section (61) interior hot water under the action of negative pressure
Heat of vaporization at gas, form the gas heating agent for carrying heat；
Gas heating agent in heating agent circulation line (5) endotherm section (52) enters condenser (7) interior heating agent under blower (505) effect
The heat release section (51) of circulation line (5), the gas heating agent in heat release section (51) occur under the positive pressure that blower (505) generates
It liquefies and releases heat, the biogas slurry in biogas slurry circulation line (4) heat exchanging segment (41) absorbs the heat discharged when the liquefaction of gas heating agent
Amount is completed to heat；
Gas heating agent the interior heating agent circulation line (5) of condenser (7) heat release section (51) occur liquefaction be condensed into liquid heat medium after,
Heat release inlet valve (501), heat absorption flowing water Valve (504) and blower (505) are closed, heat release flowing water Valve (502) are opened and is inhaled
Hot inlet valve (503) flows back to liquid heat medium in heating agent surge tank (9), and when heating agent surge tank (9), interior liquid rises to upper liquid
When level sensor (901) position, upper liquid level sensor (901) issues signal to controller, opens heating agent circulation line (5)
On heat release inlet valve (501), heat absorption flowing water Valve (504) and blower (505), continue with heating agent in evaporator and condensation
Heat absorption is carried out in device and exothermic circulation heats for biogas slurry.
9. the working method of heat-exchange system is heated outside biogas fermentation reactor according to claim 8, which is characterized in that institute
It states and is additionally provided with fluid infusion sensor (903) and fluid injection valve (904) on heating agent surge tank (9), when the liquid level of liquid heat medium is lower than benefit
When liquid sensor (903), fluid infusion sensor (903) issues signal to controller, prompts to open fluid injection valve (904) after-teeming heat
Matchmaker.
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