CN105062871A - Heating system for dry anaerobic digestion - Google Patents
Heating system for dry anaerobic digestion Download PDFInfo
- Publication number
- CN105062871A CN105062871A CN201510515859.0A CN201510515859A CN105062871A CN 105062871 A CN105062871 A CN 105062871A CN 201510515859 A CN201510515859 A CN 201510515859A CN 105062871 A CN105062871 A CN 105062871A
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- heated mandrel
- water
- hot water
- heating
- heating system
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/02—Stirrer or mobile mixing elements
- C12M27/06—Stirrer or mobile mixing elements with horizontal or inclined stirrer shaft or axis
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/24—Heat exchange systems, e.g. heat jackets or outer envelopes inside the vessel
Abstract
The invention discloses a heating system for dry anaerobic digestion. The heating system comprises a hollow heating shaft, a plurality of heating blades, a heating shaft drive device, a water segregator, a heat balance water tank and a heat exchanger. The hollow heating shaft is movably arranged in a horizontal reactor. The heating blades are fixed to the hollow heating shaft in the axial direction. The heating shaft drive device is arranged outside the horizontal reactor and connected with the hollow heating shaft and can drive the hollow heating shaft to rotate. A first hot water supply opening of the water segregator is connected with one end of the hollow heating shaft through a pipe and a hot water circulating pump. A second hot water supply opening is connected with a second water return opening of the heat balance water tank through a pipe. A water outlet of the heat balance water tank is connected with a first hot water return opening of the water segregator through the heat exchanger, and a first water return opening is connected with the other end of the hollow heating shaft through a pipe. The heat exchanger is arranged outside the horizontal reactor. A first inlet and a first outlet of the heat exchanger are connected with a main heat source. According to the heating system, through the drive action of the heating shaft drive device, the heating blades can rotate and move, materials are evenly heated, and the heat transfer efficiency is higher.
Description
Technical field
The present invention relates to anaerobic fermentation equipment field, particularly relate to a kind of heating system for dry-type anaerobic fermentation.
Background technology
In anaerobic fermentation process, methanogen is very responsive to temperature variation, in order to maintain the activity of methanogen, must keep the stability of material fermentation temperature in anaerobic fermentation process.Divide according to technological temperature, anaerobically fermenting can be divided into high temperature, middle gentle low temperature fermentation.Low-temp anaerobic fermentation does not take any heating and thermal insulation measure to material, but factor of created gase is very low and unstable under cold condition, therefore apply less in Practical Project, and all need to heat material in high temperature and middle temperature technique, heating means conventional at present divide heating and reactor external heat two kinds in reactor, wherein in reactor, heating comprises circulating hot water coil pipe and steam direct heating, circulating hot water coil pipe type of heating along with system operation time increase circulating hot water coil pipe often can because of material be wound around or bonding and form one deck integument at pipe outer wall, thus heat transfer efficiencies is reduced greatly, steam direct heating not only can cause too high growth and the distribution affecting flora of material local temperature, thus certain suppression is produced to anaerobic reaction, but also the water ratio of material can be made to increase, in addition, because heat-processed is intermittent operation, vapour outlet also easily blocks, the stability that influential system runs, and takes the precondition of these two kinds of type of heating to be that in reactor, material must keep good stirring and mixing effect.Reactor external heat is heated outside reactor by material, comprises and preheating and circulating-heating two kinds, preheat be material before entering the reactor, material is heated to technique in independently heating unit temperature required, then sends in reactor.The thermosteresis of this type of heating is comparatively large, and easily blocks; Circulating-heating mode be keep material between heating unit and reactor always circulate formation closed circuit, material through circulation repeatedly heating make temperature of charge in reactor maintain a stable scope.For dry-type anaerobic fermentation, due to the feature of its material height solid content, own relevant to the heats of material not only with heating system, but also also have direct relation with the mobility of material and mass transfer effect, up to the present also do not have a kind of specially for the high-efficiency heating system of dry anaerobic fermentation process exploitation.
Summary of the invention
Based on the problem existing for above-mentioned prior art, the invention provides a kind of heating system for dry-type anaerobic fermentation, the requirement of dry anaerobic fermentation process to temperature can be met, ensure material is heated under high heat exchanger effectiveness homogeneity and efficiency of utilization.
For solving the problems of the technologies described above, the invention provides a kind of heating system for dry-type anaerobic fermentation, comprising:
Hollow heated mandrel, some heater blade, heated mandrel drive unit, hot water circulating pump, water trap, thermal equilibrium water pot, interchanger and main heat source; Wherein,
Described hollow heated mandrel, it is actively installed in the horizontal reactor for dry-type anaerobic fermentation, and described some heater blade distribute vertically and are fixedly located on described hollow heated mandrel;
Described heated mandrel driving arrangement, is located at outside described horizontal reactor, is connected with described hollow heated mandrel, and described hollow heated mandrel can be driven to rotate;
Described water trap, is located at outside described horizontal reactor, and the first hot water service mouth of this water trap is connected with described hollow heated mandrel one end with described hot water circulating pump by the road, and the second hot water service mouth is connected with the second water return outlet of described thermal equilibrium water pot by the road;
Described thermal equilibrium water pot, is located at outside described horizontal reactor, and the water outlet of this thermal equilibrium water pot is connected with first hot water backwater's mouth of described water trap via described interchanger, and the first water return outlet is connected with the other end of described hollow heated mandrel by the road;
Described interchanger, is located at outside described horizontal reactor, and the first import, first outlet of this interchanger are connected with described main heat source.
Beneficial effect of the present invention is: by by hollow heated mandrel, hot water circulating pump, water trap, interchanger, thermal source and thermal equilibrium water pot organically combine, the multi-source heating system that one is the heat supply of dry-type anaerobic fermentation reactor can be formed, wherein heated mandrel is under the driving of drive unit, heated mandrel and heater blade can be realized and complete Agitation and mixing to material while to heating material, so not only can improve the thermal conduction of storeroom, material is heated evenly, and heater blade and heated mandrel are in dynamic rotary always, materials from bonding can be avoided to form integument at pipe outer wall, improve heat transfer efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The heating system structural representation that Fig. 1 provides for the embodiment of the present invention;
The component names that in figure, each label is corresponding is: 1. reactor; 2. hollow heated mandrel; 3. heater blade; 4. heated mandrel driving arrangement; 5. hot water circulating pump; 6. water trap; First hot water service mouth of 6A. water trap; Other thermal source inlet of 6B. water trap; Other heat supplies outlet of 6C. water trap; Second hot water service mouth of 6D. water trap; First hot water backwater's mouth of 6E. water trap; 7. main heat source; 8. thermal source hot water circulating pump; 9. softened water equipment; The water supplement port of 9A. softened water equipment; 10. interchanger; 11. thermal equilibrium water pots; 11A. thermal equilibrium water pot second water return outlet; The water outlet of 11B. thermal equilibrium water pot; First water return outlet of 11C. thermal equilibrium water pot.
Embodiment
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Figure 1 shows that a kind of heating system for dry-type anaerobic fermentation that the embodiment of the present invention provides, can be the horizontal reactor heating of dry-type anaerobic fermentation, this system comprises:
Hollow heated mandrel, some heater blade, heated mandrel drive unit, hot water circulating pump, water trap, thermal equilibrium water pot, interchanger and main heat source; Wherein,
Hollow heated mandrel, it is actively installed in the horizontal reactor for dry-type anaerobic fermentation, and some heater blade distribute vertically and are fixedly located on hollow heated mandrel;
Heated mandrel driving arrangement, is located at outside horizontal reactor, is connected with hollow heated mandrel, and hollow heated mandrel can be driven to rotate;
Water trap, is located at outside horizontal reactor, and the first hot water service mouth of this water trap is connected with hollow heated mandrel one end with hot water circulating pump by the road, and the second hot water service mouth is connected with the second water return outlet of thermal equilibrium water pot by the road;
Thermal equilibrium water pot, is located at outside horizontal reactor, and the water outlet of this thermal equilibrium water pot is connected with first hot water backwater's mouth of water trap via interchanger, and the first water return outlet is connected with the other end of hollow heated mandrel by the road;
Interchanger, is located at outside horizontal reactor, and the first import, first outlet of this interchanger are connected with main heat source, and concrete, the first water-in, first water outlet of interchanger are connected with the pipeline of the heating equipment of main heat source; Described main heat source is the main providing source of heat of whole heating system.
After each equipment in said system connects in a manner described, hollow heated mandrel, hot water circulating pump pump, water trap, main heat source, interchanger and thermal equilibrium water pot connect into the closed water route of circulation.
In said system, water trap is also provided with: other thermal source inlet and other heat supplies outlet, several thermal source can combine as system heat supply by the water trap arranging this structure simultaneously, and can adopt one or more type of heating, system is applied widely flexibly simultaneously.
In said system, thermal equilibrium water pot is set, cold and hot water can be made in thermal equilibrium water pot to complete mixing, improve the return water temperature of main heat source boiler, reduce the temperature difference, be more conducive to the stable of thermal source.
The main heat source of said heating system comprises: heating equipment and softened water equipment, and heating equipment connects into closed cycle water route by pipeline, valve and thermal source hot water circulating pump; Softened water equipment is connected by pipeline and closed water route, and the heating equipment of main heat source can adopt hot water boiler, steam boiler or electricity to add or the declaring of multiple heat form such as preheating recycling heat, and the scope of application is wider.
Said heating system, hollow heated mandrel is positioned at the central position of horizontal reactor, heater blade and hollow heated mandrel vertical welding, and in the axial direction with set angle Multi-layers distributing in the shape of a spiral.Wherein, the each heater blade spacing be in the hollow heated mandrel overall length 1/3 section of horizontal reactor feed end side is consistent, each heater blade spacing on the hollow heated mandrel of remainder is consistent, and each heater blade spacing be in the hollow heated mandrel overall length 1/3 section of horizontal reactor feed end side is less than the spacing of each heater blade on the hollow heated mandrel of remainder.
In said heating system, the pipeline of each equipment is equipped with control valve.Conveniently each equipment controlled and regulate.
Below in conjunction with specific embodiment, heating system of the present invention is described further.
The heating system for dry-type anaerobic fermentation that the embodiment of the present invention provides, comprise: hollow heated mandrel, heater blade, heated mandrel driving arrangement, hot water circulating pump, water trap, main heat source, interchanger and thermal equilibrium water pot, wherein, main heat source is formed by connecting by heating equipment, thermal source hot water circulating pump and softened water equipment;
In a horizontal reactor, the hollow heated mandrel be made up of open tube, is positioned at horizontal reactor center, along horizontal reactor longitudinally installation parallel with bottom; Heater blade and hollow heated mandrel vertical welding, and in the axial direction with set angle Multi-layers distributing in the shape of a spiral.In addition, in the side near reactor feed end, hollow heated mandrel overall length 1/3 section, heater blade is with same pitch arrangement and spacing is less, and in close discharge end side, hollow heated mandrel overall length 2/3 section, heater blade is with same pitch arrangement and spacing is larger.One end of hollow heated mandrel is connected with heated mandrel driving arrangement in the outside of reactor, and is communicated with thermal equilibrium water pot; Thermal equilibrium water pot and water trap have two-way to be connected, and a road is directly connected by pipeline, and another road is connected with water trap after interchanger.
Main heat source comprises: the boiler as heating equipment connected by the road, thermal source hot water circulating pump and softened water equipment, boiler is connected with hot water circulating pump by hot water outlet, boiler is got back to via after interchanger heat exchange, form a closed circulation waterway, softened water equipment is directly connected with closed water route as the supply consuming water.
Water trap connects hot water circulating pump, and hot water circulating pump is connected with the other end of the hollow heated mandrel outside horizontal reactor.Water trap is also provided with the interface that can be connected with heat supply with other thermals source.
Circulation waterway is connected to form by pipeline between each equipment of heating system of this dry-type anaerobic fermentation.The connection of heated mandrel and reactor and circulation waterway all adopts tightness system to seal.
In order to improve heat exchange efficiency, further, heater blade, in the axial direction with special angle Multi-layers distributing in the shape of a spiral, by radial and axial mass transfer effect, realizes material and is heated evenly.In addition, under the driving of heated mandrel driving arrangement, heated mandrel and heater blade radially rotate always, and material is not easy to form integument, realizes higher heat exchanger effectiveness.
In order to improve erosion resistance and the wear resistance of device, further: hollow heated mandrel and heater blade and all adopt stainless steel with the device that material directly contacts.
In order to realize abundant heat exchange, further, the hot water in hollow heated mandrel is with the low speeds flow of 0.5 ~ 1.8m/s.
In order to ensure that circuit and elements is installed and maintenance, further, all pipelines of access device are equipped with valve.
The structure of the heating system for dry-type anaerobic fermentation that the present embodiment provides as shown in Figure 1, in a horizontal reactor, makes hollow heated mandrel 2 by hollow pipe, is positioned at horizontal reactor 1 center, along horizontal reactor 1 longitudinally installation parallel with bottom.Heater blade 3 and hollow heated mandrel 2 vertical welding, and in the axial direction with special angle Multi-layers distributing in the shape of a spiral.In addition, in the side near reactor 1 feed end, hollow heated mandrel 2 overall length 1/3 section, heater blade 3 is with same pitch arrangement and spacing is less, and in close discharge end side, hollow heated mandrel 2 overall length 2/3 section, heater blade 3 is with same pitch arrangement and spacing is larger.One end of hollow heated mandrel 2 is connected with heated mandrel driving arrangement 4 in the outside of reactor 1, and is communicated with thermal equilibrium water pot 11.Under the driving of heated mandrel driving arrangement 4, hollow heated mandrel 2 and heater blade 3 radially rotate.Thermal equilibrium water pot 11 has two-way to be connected with water trap 6, and a road is directly connected by pipeline, and another road is connected with water trap 6 after interchanger 10.The hot water outlet of the heating equipment of main heat source 7 is connected with thermal source hot water circulating pump 8, and via the heating equipment getting back to main heat source 7 after interchanger 10, form a closed ring-type water route, softened water equipment 9 and described closed cycle water route are connected.Water trap 6 connects hot water circulating pump 5, and hot water circulating pump 5 is connected with the other end of the hollow heated mandrel 2 outside reactor 1.Water trap 6 also can be connected with heat supply with other thermals source.Connect to form circulation waterway by pipeline between each equipment of heating system for dry-type anaerobic fermentation of the present invention, the connection of heated mandrel and reactor and circulation waterway all adopts tightness system to seal, and all pipelines of access device are equipped with valve.Under the driving of hot water circulating pump, the hot water in hollow heated mandrel flows with the speed of 0.5 ~ 1.8m/s.
When needs heat material, start thermal source hot water circulating pump 8, water is at ring-type water route internal circulation flow.Startup main heat source 7 heats the water in ring-type water route.Water in timing softened water equipment 9 pairs of ring-type water routes supplements.Start hot water circulating pump 5, the hot water being driven across interchanger 10 heat exchange flows in circulation waterway, and hot water flows to hollow heated mandrel 2, starts heated mandrel driving arrangement 4, hollow heated mandrel 2 and heater blade 3 are radially rotated, is heated by hollow heated mandrel 2 and heater blade 3 pairs of materials.First 1/3 section of reactor 1, heater blade 3 distributes closeer, increases heat interchanging area, makes biological material be heated rapidly to required technological temperature; Latter 2/3 section of reactor 1, heater blade 3 distributes thinner, and heat interchanging area is relatively little, maintains the technological temperature needed for material.The radial mixing effect of heater blade 3, strengthen the homogeneity that material is heated, the screw arrangement of heater blade 3, add axial prograding, material is not easy to occur to be wound around or to bond and form one deck integument at pipe outer wall around hollow heated mandrel 2 and heater blade 3, thus enhances the heating efficiency to material.Cold water flow backheat balance water pot 11 after heating, after the heat exchange of interchanger 10 hot water, again gets back to hollow heated mandrel 2 pairs of materials and heats.
The endogenous pyrogen of said heating system can adopt hot water, also can provide thermal source with steam or electrically heated, can reach same effect.When thermal source is steam, steam flow rate 5 ~ 30m/s, when adopting electrically heated, need set up calrod in hollow heated mandrel.This heating system can be used for the heating of dry-type anaerobic fermentation, by heating function being integrated on agitator (hollow heated mandrel and heater blade), the agitator of heating system remains at a rotary state on the one hand, not easily there is the situation that agitator is wound around by material and wraps up, and the material that heat is flowed with axis and radial direction in the form of radiation by hollow heated mandrel and heater blade exchanges, not only ensure the homogeneity of temperature distribution, but also improve heat exchanger effectiveness, reduce system energy consumption; On the other hand by the layout of heater blade reasonable organization, achieve and give different heating intensities according to difference in functionality subregion in reactor, ensure that whole system is run under optimal temperature conditions.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. for a heating system for dry-type anaerobic fermentation, it is characterized in that, comprising:
Hollow heated mandrel, some heater blade, heated mandrel drive unit, hot water circulating pump, water trap, thermal equilibrium water pot, interchanger and main heat source; Wherein,
Described hollow heated mandrel, it is actively installed in the horizontal reactor for dry-type anaerobic fermentation, and described some heater blade distribute vertically and are fixedly located on described hollow heated mandrel;
Described heated mandrel driving arrangement, is located at outside described horizontal reactor, is connected with described hollow heated mandrel, and described hollow heated mandrel can be driven to rotate;
Described water trap, is located at outside described horizontal reactor, and the first hot water service mouth of this water trap is connected with described hollow heated mandrel one end with described hot water circulating pump by the road, and the second hot water service mouth is connected with the second water return outlet of described thermal equilibrium water pot by the road;
Described thermal equilibrium water pot, is located at outside described horizontal reactor, and the water outlet of this thermal equilibrium water pot is connected with first hot water backwater's mouth of described water trap via described interchanger, and the first water return outlet is connected with the other end of described hollow heated mandrel by the road;
Described interchanger, is located at outside described horizontal reactor, and the first import, first outlet of this interchanger are connected with described main heat source.
2. the heating system for dry-type anaerobic fermentation according to claim 1, is characterized in that, described main heat source comprises:
Heating equipment, is connected with thermal source hot water circulating pump by pipeline, valve;
Softened water equipment, is connected with described boiler by pipeline.
3. the heating system for dry-type anaerobic fermentation according to claim 1 and 2, is characterized in that, described water trap is also provided with:
Other thermal source inlet and other heat supplies outlet.
4. the heating system for dry-type anaerobic fermentation according to claim 1 and 2, it is characterized in that, described hollow heated mandrel is positioned at the central position of horizontal reactor, described heater blade and described hollow heated mandrel vertical welding, and in the axial direction with set angle Multi-layers distributing in the shape of a spiral.
5. the heating system for dry-type anaerobic fermentation according to claim 4, it is characterized in that, the each heater blade spacing be in the described hollow heated mandrel overall length 1/3 section of described horizontal reactor feed end side is consistent, each heater blade spacing on the described hollow heated mandrel of remainder is consistent, and each heater blade spacing be in the described hollow heated mandrel overall length 1/3 section of described horizontal reactor feed end side is less than the spacing of each heater blade on the described hollow heated mandrel of described remainder.
6. the heating system for dry-type anaerobic fermentation according to claim 1 and 2, is characterized in that, in described heating system each equipment pipeline on be equipped with control valve.
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| CN109701999A (en) * | 2019-02-21 | 2019-05-03 | 蔚复来(浙江)科技股份有限公司 | Fermentation mechanism for food waste treatment equipment, the food waste treatment equipment and system using it |
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| CN105062871B (en) | 2018-05-22 |
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Inventor after: Hu Fang Inventor after: Yan Yuanyuan Inventor after: Li Caibin Inventor after: Guo Feifan Inventor before: Guo Feifan Inventor before: Hu Fang Inventor before: Li Caibin Inventor before: Lan Xiaoning Inventor before: Yan Yuanyuan |
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