CN112902283B - Waste water heat recovery heating system - Google Patents
Waste water heat recovery heating system Download PDFInfo
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- CN112902283B CN112902283B CN202110173094.2A CN202110173094A CN112902283B CN 112902283 B CN112902283 B CN 112902283B CN 202110173094 A CN202110173094 A CN 202110173094A CN 112902283 B CN112902283 B CN 112902283B
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- methane tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/0002—Means for connecting central heating radiators to circulation pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a waste water heat recovery heating system, which belongs to the technical field of heat recovery and comprises a liquid conveying pipe, a heat exchange pipe and a methane tank. The heat exchange tube is sleeved outside the infusion tube, a heat exchange cavity is defined between the heat exchange tube and the infusion tube, and a liquid inlet of the heat exchange tube is used for introducing low-temperature return water into the heat exchange cavity; the liquid outlet of the heat exchange tube is communicated with a burner. The outside of the methane tank is wrapped with a heat insulation material, the heat insulation material and the outer wall of the methane tank form a wastewater circulation channel, the top of the methane tank is provided with a flow dividing piece, and the flow dividing piece is communicated with a water outlet of a liquid conveying pipe through a conveying pipe; the flow dividing piece is used for dividing the waste water after heat exchange to the waste water circulation channel; the gas outlet of the methane tank is communicated with the combustor through a pipeline and is used for conveying methane into the combustor; the bottom of the methane tank is communicated with a water pump through a liquid discharge pipe. The waste water heat recovery heating system provided by the invention realizes secondary heating under the condition of lower cost, reduces the input of energy and saves the cost.
Description
Technical Field
The invention belongs to the technical field of heat recovery, and particularly relates to a waste water heat recovery heating system.
Background
A large amount of high-temperature waste water is generated in the production process of a cast tube enterprise, and if the waste water is directly discharged, the waste of resources is inevitably caused. Although there is a heating system that carries out heat recovery to waste water now, because heat exchange efficiency is lower to circulating water in the heating system is not big with high temperature waste water temperature difference, therefore heat recovery effect is not obvious, still need consume a large amount of energy, just can satisfy daily demand.
Disclosure of Invention
The invention aims to provide a waste water heat recovery heating system, and aims to solve the problems that the temperature difference between circulating water in the heating system and high-temperature waste water is not large, so that the heat recovery effect is not obvious, and a large amount of energy is still required to be consumed.
In order to achieve the purpose, the invention adopts the technical scheme that: providing a waste water heat recovery heating system comprising:
the device comprises an infusion tube, a connecting tube and a plurality of spoilers, wherein the connecting tube penetrates through the infusion tube; the water inlet of the liquid conveying pipe is used for introducing high-temperature wastewater;
the heat exchange tube is sleeved on the outer side of the infusion tube, a heat exchange cavity is defined between the heat exchange tube and the infusion tube, and a liquid inlet of the heat exchange tube is used for introducing low-temperature return water into the heat exchange cavity; the liquid outlet of the heat exchange tube is communicated with a burner;
the biogas digester is characterized in that the outer side of the biogas digester is wrapped with a heat insulation material, the heat insulation material and the outer wall of the biogas digester form a wastewater circulation channel, the top of the biogas digester is provided with a flow dividing piece, and the flow dividing piece is communicated with a water outlet of the liquid conveying pipe through a conveying pipe; the flow dividing piece is used for dividing the waste water subjected to heat exchange into the waste water circulation channel; the gas outlet of the methane tank is communicated with the combustor through a pipeline and is used for conveying methane into the combustor; the bottom of the methane tank is communicated with a water pump through a liquid discharge pipe.
As another embodiment of the present application, heat insulating materials are disposed inside the connection pipe and outside the heat exchange pipe.
As another embodiment of the present application, a plurality of spoilers are spirally arranged along an axial direction of the connection pipe.
As another embodiment of the present application, the outer side of the spoiler is welded and fixed to the inner wall of the infusion tube, and the inner side of the spoiler abuts against the outer wall of the connection tube.
As another embodiment of this application, the reposition of redundant personnel is located the outside of gas outlet, and follows a plurality of outage have been seted up to the circumference of reposition of redundant personnel.
As another embodiment of this application, shunt has inside to have been seted up and to hold miscellaneous chamber, and is a plurality of go out the liquid hole with hold miscellaneous chamber intercommunication, and set up the top of shunt.
As another embodiment of the application, the inner side surface of the heat insulation material is provided with a waterproof film.
As another embodiment of the application, a ring piece is arranged along the outer wall of the methane tank, and a plurality of water through holes are formed along the length direction of the ring piece.
As another embodiment of the application, the number of the ring pieces is multiple, and the ring pieces are sequentially arranged along the height direction of the methane tank.
As another embodiment of the application, the outer edge of the ring piece extends upwards and forms a groove with the outer wall of the methane tank.
The waste water heat recovery heating system provided by the invention has the beneficial effects that: compared with the prior art, the waste water heat recovery heating system has the advantages that the connecting pipe penetrates through the infusion pipe, and the spoilers are arranged between the connecting pipe and the infusion pipe. The heat exchange tube cover is established in the outside of transfer line, encloses between heat exchange tube and the transfer line simultaneously and establishes to the heat transfer chamber, and the liquid outlet intercommunication of heat exchange tube has the combustor. The top of the methane tank is provided with a flow dividing piece which is communicated with the water outlet of the liquid conveying pipe through a conveying pipe, the heat insulation material wraps the outer side of the methane tank, and the heat insulation material and the outer wall of the methane tank form a waste water circulation channel.
In the practical application process, high-temperature wastewater is introduced into the water inlet of the liquid conveying pipe, and low-temperature return water is introduced into the liquid inlet of the heat exchange pipe. The plurality of spoilers prolong the time of high-temperature waste water flowing through the infusion tube, and improve the heat exchange efficiency. Waste water after heat exchange flows into the flow dividing piece through the conveying pipe and is divided into the waste water circulation channel under the action of the flow dividing piece, and the heat insulation material wraps the outer side of the methane tank, so that the constant temperature of the whole methane tank is ensured under the action of the heat insulation material and the waste water. Biogas generated in the biogas pool is conveyed to the burner through a pipeline, namely low-temperature return water firstly exchanges heat with high-temperature wastewater and then is heated by the burner, so that secondary temperature rise is realized under the condition of lower cost, the input of energy is reduced, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a connection tube and an infusion tube according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between the biogas digester, the supporting frame and the heat insulation material according to the embodiment of the present invention;
fig. 3 is a flow chart of a waste water heat recovery heating system according to an embodiment of the present invention.
In the figure: 1. a connecting pipe; 2. a thermal insulation material; 3. a spoiler; 4. a heat exchange pipe; 5. a liquid outlet; 6. a water outlet; 7. a liquid inlet; 8. a water inlet; 9. a burner; 10. a pipeline; 11. a delivery pipe; 12. a water pump; 13. a water-resistant film; 14. a water through hole; 15. a support frame; 16. insulating materials; 17. a flow divider; 18. an overflow aperture; 19. a liquid discharge pipe; 20. a ring member; 21. a biogas generating pit; 22. an infusion tube.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 3 together, a waste water heat recovery heating system according to the present invention will now be described. The waste water heat recovery heating system comprises a liquid conveying pipe 22, a heat exchange pipe 4, a methane tank 21 and a heat insulating material 16. A connecting pipe 1 is arranged in the infusion pipe 22 in a penetrating way, and a plurality of spoilers 3 are arranged between the connecting pipe 1 and the infusion pipe 22; the water inlet 8 of the liquid conveying pipe 22 is used for introducing high-temperature waste water. The heat exchange tube 4 is sleeved on the outer side of the infusion tube 22, a heat exchange cavity is defined between the heat exchange tube 4 and the infusion tube 22, and a liquid inlet 7 of the heat exchange tube 4 is used for introducing low-temperature return water into the heat exchange cavity; the liquid outlet 5 of the heat exchange tube 4 is communicated with a burner 9. The outer side of the methane tank 21 is wrapped with a heat insulating material 16, the heat insulating material 16 and the outer wall of the methane tank 21 form a wastewater circulation channel, the top of the methane tank 21 is provided with a flow dividing piece 17, and the flow dividing piece 17 is communicated with the water outlet 6 of the liquid conveying pipe 22 through the conveying pipe 11; the flow dividing piece 17 is used for dividing the waste water after heat exchange to a waste water circulation channel; the gas outlet of the methane tank 21 is communicated with the combustor 9 through a pipeline 10 and is used for conveying methane into the combustor 9; the bottom of the methane tank 21 is communicated with the water pump 12 through a liquid discharge pipe 19.
The waste water heat recovery heating system provided by the invention has the beneficial effects that: compared with the prior art, the connecting pipe 1 is arranged in the infusion pipe 22 in the waste water heat recovery heating system in a penetrating way, and the spoilers 3 are arranged between the connecting pipe 1 and the infusion pipe 22. The heat exchange tube 4 is sleeved outside the infusion tube 22, meanwhile, a heat exchange cavity is formed between the heat exchange tube 4 and the infusion tube 22 in an enclosing mode, and a liquid outlet 5 of the heat exchange tube 4 is communicated with the combustor 9. The top of the methane tank 21 is provided with a flow dividing piece 17, the flow dividing piece 17 is communicated with the water outlet 6 of the liquid conveying pipe 22 through the conveying pipe 11, the heat insulation material 16 is wrapped on the outer side of the methane tank 21, and the heat insulation material 16 and the outer wall of the methane tank 21 form a waste water circulation channel.
In the practical application process, high-temperature wastewater is introduced into the water inlet 8 of the liquid conveying pipe 22, and low-temperature return water is introduced into the liquid inlet 7 of the heat exchange pipe 4. The plurality of spoilers 3 prolong the time of high-temperature wastewater flowing through the infusion tube 22, and improve the heat exchange efficiency. The waste water after heat exchange flows into the flow dividing piece 17 through the conveying pipe 11 and is divided into the waste water circulation channel under the action of the flow dividing piece 17, and the heat insulation material 16 wraps the outer side of the methane tank 21, so that the constant integral temperature in the methane tank 21 is ensured under the action of the heat insulation material 16 and the waste water. Biogas generated in the biogas digester 21 is conveyed to the burner 9 through the pipeline 10, namely low-temperature return water exchanges heat with high-temperature wastewater firstly, and then is heated by the burner 9, so that secondary temperature rise is realized under the condition of lower cost, the input of energy is reduced, and the cost is saved.
Referring to fig. 1 and 3, as a specific embodiment of the waste water heat recovery heating system provided by the present invention, heat insulating materials 2 are disposed inside the connection pipe 1 and outside the heat exchange pipe 4. Through setting up a plurality of spoilers 3 in this application, prolong the time of high temperature waste water circulation on the one hand, on the other hand can improve the heat exchange efficiency between high temperature waste water and the low temperature return water. In order to avoid the loss of the temperature of the high-temperature wastewater, firstly, the connecting pipe 1 is made of a heat insulating material, and in order to further improve the heat insulating effect, the connecting pipe 1 is filled with a heat insulating material 2, so that the heat is greatly prevented from being lost to the outside through the connecting pipe 1.
In order to improve the heat exchange efficiency, the liquid transfer tube 22 is made of copper material. In the heating system, although outdoor environment temperature is lower, the temperature of low-temperature return water is still higher than the outside temperature, and in order to avoid the outside environment that the heat of low-temperature return water distributes, the outside of heat exchange tube 4 is wrapped with heat insulation material 2. The heat exchange tube 4 is placed in a relatively closed environment.
In order to improve the heat exchange effect, convection between the high-temperature wastewater and the low-temperature return water is required to be generated, and therefore, the water inlet 8 of the liquid conveying pipe 22 is arranged above the water outlet 6, and the liquid inlet 7 of the heat exchange pipe 4 is arranged below the liquid outlet 5.
In the application, the high-temperature wastewater can be slag flushing wastewater, most of large blast furnaces in China adopt a slag flushing process at present, the hot water flow of slag flushing is large, the temperature of the wastewater is high, and the average temperature is about 75 ℃. How to fully recover the part of energy is the key to improve the utilization rate of energy and reduce energy consumption. It should be noted that, because the present application does not have the mixing of the high-temperature wastewater and the low-temperature return water, the high-temperature wastewater can be reused only by performing the anti-corrosion treatment on the biogas digester 21.
As a specific embodiment of the waste water heat recovery heating system according to the present invention, referring to fig. 1, a plurality of spoilers 3 are spirally arranged along an axial direction of a connection pipe 1. Taking the example that the water inlet 8 of the infusion tube 22 is higher than the water outlet 6, the spoiler 3 is first inclined and downwardly disposed along the axial direction of the connection tube 1, and the plurality of spoilers 3 are spirally arranged along the axial direction of the connection tube 1. When liquid flows in from the water inlet 8 at the top of the infusion tube 22, the high-temperature wastewater spirally rotates along the axial direction of the connecting tube 1 under the action of the spoilers 3. Because the high-temperature wastewater is in the rotating process and has a certain centripetal force, the high-temperature wastewater can be attached to the inner wall of the infusion tube 22 between the two spoilers 3, and the heat exchange efficiency is improved.
Referring to fig. 1, an outer side of the spoiler 3 is welded and fixed to an inner wall of the infusion tube 22, and an inner side of the spoiler 3 abuts against an outer wall of the connection tube 1. Because untreated impurities may be doped in the high-temperature wastewater, the length of the spoilers 3 is short, and the two adjacent spoilers 3 are arranged at a certain interval, so that the problem that if the spoilers 3 extend from the top of the infusion tube 22 to the bottom of the infusion tube 22, the spoilers are easily blocked is solved.
Because the spoilers 3 are arc-shaped members, the number of the required spoilers 3 is large, and the material of the infusion tube 22 and the connecting tube 1 is different, the outer sides of the spoilers 3 can be directly welded and fixed on the inner wall of the infusion tube 22, and the inner sides of the spoilers 3 can be directly abutted against the connecting tube 1. Although a large amount of high-temperature wastewater is input from the water inlet 8 of the infusion tube 22 per unit time, it is still a problem how to weld and fix a plurality of spoilers 3 to the infusion tube 22, and for this purpose, a plurality of spoilers 3 can be welded and fixed to a flat plate according to a preset requirement, and then the flat plate is wound to form the infusion tube 22.
The top of the methane tank 21 is provided with an air outlet, for the convenience of understanding, the top of the methane tank 21 is also provided with an exhaust pipe, the exhaust pipe is vertically arranged upwards, and the top of the exhaust pipe is provided with the air outlet, namely the exhaust pipe is communicated with the combustor 9 through a pipeline 10.
As a specific embodiment of the waste water heat recovery heating system provided by the present invention, please refer to fig. 2, the flow divider 17 is disposed outside the air outlet, and a plurality of overflow holes 18 are disposed along the circumferential direction of the flow divider 17. The temperature of the low-temperature backwater and the temperature of the waste water after heat exchange are both higher than the outdoor temperature, and in order to continuously recover the heat of the waste water after heat exchange, the water outlet 6 of the infusion tube 22 needs to be communicated with the flow dividing piece 17 through the delivery tube 11. The purpose of the flow divider 17 is to make the transported waste water after heat exchange flow through the outer wall of the methane tank 21 in a more dispersed manner. Therefore, a plurality of overflow holes 18 are formed along the circumferential direction of the flow divider 17, the number of the overflow holes 18 is large, and the inner diameter of each overflow hole 18 is large, so that the blockage caused by impurities is avoided.
In order to make the flow rate of the overflow holes 18 the same in all directions, the flow divider 17 is disposed at the top of the biogas digester 21 and outside the gas outlet, i.e., the exhaust pipe.
Referring to fig. 2, as a specific embodiment of the waste water heat recovery heating system provided by the present invention, a trash chamber is formed inside the flow divider 17, and the plurality of overflow holes 18 are communicated with the trash chamber and formed at the top of the flow divider 17. Because can mix some impurity in the waste water, if pile up in the bottom of methane-generating pit 21 outer wall then can't be easily cleared up out, consequently in order to filter impurity to a certain extent, make the water yield of a plurality of overflow holes 18 can tend to unanimity simultaneously, set up the miscellaneous chamber of holding of certain volume in reposition of redundant personnel 17, hold miscellaneous chamber and have certain height in vertical direction, hold the bottom rounding off in miscellaneous chamber simultaneously, thereby make the waste water that gets into and hold miscellaneous intracavity can rotate, make some impurity pile up in the bottom of holding miscellaneous chamber, and make water discharge from a plurality of overflow holes 18.
Referring to fig. 2 and 3, as a specific embodiment of the waste water heat recovery heating system provided by the present invention, a waterproof film 13 is disposed on an inner side surface of the heat insulating material 16. Because heating is usually required in a season with a lower temperature, and the distance between the methane tank 21 and the ground is smaller, the methane generated by the methane tank 21 is less in winter, mainly because the temperature in the methane tank 21 is lower. In the application, the waste water after heat exchange flows through the outer wall of the methane tank 21 to continuously heat the methane tank 21, so that the temperature in the methane tank 21 is in a relatively stable state.
In order to avoid the heat of the waste water after heat exchange from being dissipated to the surrounding soil, a support frame 15 is arranged on the outer side of the methane tank 21, the support frame 15 can be a corrosion-resistant metal material support, then a heat insulation material 16 is connected to the support frame 15, and the heat insulation material 16 can be directly bolted to the support frame 15. Support frame 15 is frame construction, must form the through-hole on support frame 15, consequently can set up insulation material in the through-hole to make support frame 15 tentatively form a comparatively confined structure, then connect heat preservation material 16 on support frame 15's the inside and outside side, heat preservation material 16 is two-layer, thereby the at utmost has reduced thermal loss.
Because the waste water that flows at the methane-generating pit 21 outer wall probably has certain corrosivity, if waste water direct contact heat preservation material 16 simultaneously, then can lead to the inefficacy of heat preservation material 16 heat preservation effect certainly, for this reason can all set up waterproof membrane 13 in two-layer heat preservation material 16 sides of keeping away from each other on support frame 15, the waterproof membrane 13 that lies in the heat preservation material 16 of inlayer is used for preventing the waste water entering, and the waterproof membrane 13 that lies in outer heat preservation material 16 is used for preventing the moisture entering in the soil, thereby can long-time stable operation, need not daily maintenance.
The high-temperature wastewater contains a large amount of chloride ions and other substances, so that the high-temperature wastewater has high corrosion resistance, and the waterproof film 13 has a certain thickness and high corrosion resistance in order to avoid the wastewater from corroding the heat insulating material 16.
As a specific embodiment of the waste water heat recovery heating system provided by the present invention, please refer to fig. 2, a ring member 20 is disposed along an outer wall of a biogas generating pit 21, and a plurality of water through holes 14 are disposed along a length direction of the ring member 20. Because the volume of the biogas digester 21 is large, although the diversion member 17 can divert the wastewater conveyed by the conveying pipe 11, the wastewater cannot completely cover the outer wall of the biogas digester 21 due to the manufacturing error of the diversion member 17 and the uneven surface of the biogas digester 21, and finally the heat preservation performance is poor. In order to solve the problems, the ring piece 20 is arranged on the outer wall of the methane tank 21, and the ring piece 20 can be directly positioned on the methane tank 21 through embedded bolts on the methane tank 21 or can be directly positioned on the methane tank 21 through expansion bolts.
The plurality of water through holes 14 are formed in the length direction of the ring piece 20, the water through holes 14 penetrate through the ring piece 20, and water which is not discharged in time flows in the length direction of the ring piece 20 after the wastewater flows to the ring piece 20, so that the effect of splitting the wastewater again is achieved. The ring piece 20 is arranged to enable the waste water to uniformly flow downwards along the circumferential direction of the methane tank 21, so that the waste water can be uniformly wrapped on the outer wall of the methane tank 21, and the methane tank 21 is uniformly heated and insulated.
As a specific embodiment of the waste water heat recovery heating system provided by the present invention, referring to fig. 2, the number of the ring members 20 is plural, and the plural ring members 20 are sequentially arranged along the height direction of the methane tank 21. Because the volume of the methane tank 21 is large, if only one ring member 20 is arranged, the waste water is difficult to uniformly cover the outer wall of the methane tank 21, a plurality of ring members 20 are sequentially arranged in the height direction of the methane tank 21, and a certain distance is arranged between every two adjacent ring members 20. After the turbulent flow action of one ring 20, the waste water is discharged from the plurality of water through holes 14 on the ring 20 and flows to the next ring 20.
The ring piece 20 can disturb the flow of the waste water, prolong the time of the waste water flowing through the outer wall of the methane tank 21 and ensure that the heat in the waste water after heat exchange can fully heat the methane tank 21. On the other hand, the plurality of ring members 20 can form a water film uniformly wrapped on the outer wall of the methane tank 21, and the heat preservation performance is also improved.
Although the inside microorganisms of the biogas digester 21 are decomposed to generate a certain amount of heat in the use process, the temperature in the biogas digester 21 is still not constant even if a heat preservation facility is arranged on the outer wall of the biogas digester 21 in the heating season, so that the waste water after heat exchange flows through the outer wall of the biogas digester 21, and a warmer environment can be provided for the biogas digester 21.
Referring to fig. 2, as a specific embodiment of the waste water heat recovery heating system provided by the present invention, the outer edge of the ring member 20 extends upward and forms a groove with the outer wall of the methane tank 21. In order to discharge the waste water through the plurality of water through holes 14 on the ring member 20, the outer edge of the ring member 20 is extended upwards to form a groove with the outer wall of the methane tank 21, so that the waste water flows in the groove and is discharged from the plurality of water through holes 14 on the corresponding ring member 20.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Waste water heat recovery heating system, its characterized in that includes:
the infusion tube is internally provided with a connecting tube in a penetrating manner, and a plurality of spoilers are arranged between the connecting tube and the infusion tube; the water inlet of the liquid conveying pipe is used for introducing high-temperature wastewater;
the heat exchange tube is sleeved on the outer side of the infusion tube, a heat exchange cavity is defined between the heat exchange tube and the infusion tube, and a liquid inlet of the heat exchange tube is used for introducing low-temperature return water into the heat exchange cavity; the liquid outlet of the heat exchange tube is communicated with a burner;
the biogas digester is characterized in that the outer side of the biogas digester is wrapped with a heat insulation material, the heat insulation material and the outer wall of the biogas digester form a wastewater circulation channel, the top of the biogas digester is provided with a flow dividing piece, and the flow dividing piece is communicated with a water outlet of the liquid conveying pipe through a conveying pipe; the flow dividing piece is used for dividing the waste water subjected to heat exchange into the waste water circulation channel; the gas outlet of the methane tank is communicated with the combustor through a pipeline and is used for conveying methane into the combustor; the bottom of the methane tank is communicated with a water pump through a liquid discharge pipe.
2. The waste water heat-recovery heating system as claimed in claim 1, wherein the inside of the connection pipe and the outside of the heat exchange pipe are provided with an adiabatic material.
3. The waste water heat-recovery heating system of claim 1, wherein a plurality of the spoilers are spirally arranged along an axial direction of the connection pipe.
4. The waste water heat recovery heating system of claim 1, wherein the outer side of the spoiler is welded and fixed to the inner wall of the liquid transport pipe, and the inner side of the spoiler abuts against the outer wall of the connection pipe.
5. The waste water heat recovery heating system of claim 1, wherein the flow divider is disposed outside the air outlet, and a plurality of drain holes are formed along a circumferential direction of the flow divider.
6. The waste water heat recovery heating system according to claim 5, wherein the dividing member is provided with an impurity accommodating cavity therein, and the plurality of drain holes are communicated with the impurity accommodating cavity and are provided at the top of the dividing member.
7. The waste water heat recovery heating system of claim 1, wherein the insulating material is provided with a waterproof film on an inner side.
8. The waste water heat recovery heating system of claim 1, wherein a ring is disposed along the outer wall of the biogas digester, and a plurality of water through holes are opened along the length direction of the ring.
9. The waste water heat recovery heating system of claim 8, wherein the number of the rings is plural, and the plural rings are sequentially arranged along the height direction of the methane tank.
10. The waste water heat recovery heating system of claim 8, wherein the outer edge of the ring extends upward and forms a groove with the outer wall of the methane tank.
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| CN110526533A (en) * | 2019-08-01 | 2019-12-03 | 安徽其霖环境工程技术有限公司 | The method of scale livestock farming comprehensive utilization of waste |
| CN111536514B (en) * | 2020-04-12 | 2021-11-19 | 华南理工大学 | Device and method for recovering heat energy from anaerobic treatment process of wastewater |
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