CN102927685A - Waste sewage heat recycling device - Google Patents
Waste sewage heat recycling device Download PDFInfo
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- CN102927685A CN102927685A CN2012104949219A CN201210494921A CN102927685A CN 102927685 A CN102927685 A CN 102927685A CN 2012104949219 A CN2012104949219 A CN 2012104949219A CN 201210494921 A CN201210494921 A CN 201210494921A CN 102927685 A CN102927685 A CN 102927685A
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Abstract
The invention relates to a waste sewage heat recycling device which comprises an evaporator, a refrigerant compressor, a condenser, a controller and a water tank, wherein the water tank is provided with a liquid level controller; processed sewage flows through a stop valve and a flow adjusting valve in sequence and subsequently enters the evaporator; an outlet on a primary side of the evaporator is communicated with a sewage pipe network; an inlet on a secondary side of the evaporator is communicated with an inlet on a primary side of the condenser through an expansion valve; an outlet on a secondary side of the evaporator is communicated with the inlet on the primary side of the condenser through the refrigerant compressor; an inlet on a secondary side of the condenser is communicated with a tap water supply network or a heat supply network through a heating circulation pump set and the water tank in sequence; an outlet on a secondary side of the condenser is communicated with a hot water user through the water tank and a water supply pump set; a pressure sensor is arranged at the outlet on the secondary side of the evaporator; and the output end of the controller is connected with the automatic flow adjusting valve. The waste sewage heat recycling device has the characteristics of small heat loss, high energy utilization rate and the like, and can be widely applied to waste heat recycling systems.
Description
Technical field
The present invention relates to the heat recovery technology, particularly relate to a kind of sewage waste heat recovery device.
Background technology
Along with Development of China's Urbanization strengthens, the quantity of municipal wastewater increases increasingly, and these sewage bring the increasing pressure to the normal operation in city.Generally, after the sewage water treatment method that adopts physical method, chemical method and biochemical method to combine was processed municipal wastewater, water quality reached relevant criterion, can be used as the usefulness of cleaning, irrigation.But, in the practical application, owing to have 20 ℃ ~ 30 ℃ waste heat in the sewage after processing, so directly use treated sewage can cause the loss of heat.
This shows, in the prior art, have the problem that thermal loss is large, energy utilization rate is lower in the sewage disposal process.
Summary of the invention
In view of this, main purpose of the present invention is to provide the sewage waste heat recovery device that a kind of thermal loss is little, energy utilization rate is higher.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of sewage waste heat recovery device, comprise for to from the treated sewage of sewage treatment plant and the evaporimeter that carries out heat exchange from the cold-producing medium of condenser, for the cold medium compressor to compressing through the cold-producing medium that gasifies after the heat exchange, be used for the condenser that carries out heat exchange to through the cold-producing medium of overcompression and running water or the recirculated water that heats, be used for by the control of evaporimeter air pressure inside value through the stable controller of refrigerant temperature after the heat exchange, be used for carry out the water tank of flow-dividing control from the running water of outside or heating recirculated water and the running water that advanced heat exchange at condenser or heating recirculated water; Wherein, water tank is with the fluid level controller that prevents from causing water to overflow owing to water level is too high;
Treated sewage from sewage treatment plant enters the import of evaporimeter primary side by stop valve, flow control valve successively, and the outlet of evaporimeter primary side is communicated with sewage network; The import of evaporimeter secondary side is communicated with by expansion valve with the outlet of condenser primary side, and the outlet of evaporimeter secondary side is communicated with by cold medium compressor with the import of condenser primary side; The import of condenser secondary side is communicated with outside tap water supply net or heating net by Heating Cyclic pump group, water tank successively, and the outlet of condenser secondary side is communicated with the hot water user by water tank, conveying pump group successively; Evaporimeter secondary side exit is provided with the pressure sensor that evaporimeter air pressure inside value is sent to controller, and controller output end is connected to motor valve.
In sum, in the sewage waste heat recovery device of the present invention, after condenser primary side cold-producing medium enters the evaporimeter secondary side, carry out heat exchange with the treated sewage from sewage treatment plant of evaporimeter primary side; In evaporimeter, after the part of waste heat that the treated sewage of cold-producing medium absorption carries, by the gaseous state that liquid state is vaporizated into and liquid equality of temperature is pressed together; The cold-producing medium of gaseous state through the cold medium compressor compression after temperature further raise with pressure, enter the running water of condenser primary side and condenser secondary side or the recirculated water that heats carries out heat exchange through the gaseous refrigerant of overcompression; Behind the running water or heating recirculated water process water tank flow-dividing control through the running water of heat exchange or heat recirculated water and external complement, running water or heating recirculated water through heat exchange enter the hot water user, and the running water of external complement or heating recirculated water enter condenser and carries out heat exchange.This shows that sewage waste heat recovery device of the present invention can extract the waste heat in the sewage more fully, and the waste heat that extracts is used for the hot water user with further utilization, so the present invention has the advantages that thermal loss is little, energy utilization rate is higher.
Description of drawings
Fig. 1 is that the first of sewage waste heat recovery device of the present invention forms structural representation.
Fig. 2 is that the second of sewage waste heat recovery device of the present invention forms structural representation.
Fig. 3 is the composition structural representation of controller of the present invention.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing and instantiation.
Fig. 1 is that the first of sewage waste heat recovery device of the present invention forms structural representation.As shown in Figure 1, sewage waste heat recovery device of the present invention comprises for to from the treated sewage of sewage treatment plant and the evaporimeter that carries out heat exchange from the cold-producing medium of condenser, for the cold medium compressor to compressing through the cold-producing medium that gasifies after the heat exchange, be used for the condenser that carries out heat exchange to through the cold-producing medium of overcompression and running water or the recirculated water that heats, be used for by the control of evaporimeter air pressure inside value through the stable controller of refrigerant temperature after the heat exchange, be used for carry out the water tank of flow-dividing control from the running water of outside or heating recirculated water and the running water that advanced heat exchange at condenser or heating recirculated water; Wherein, water tank is with the fluid level controller that prevents from causing water to overflow owing to water level is too high;
Treated sewage from sewage treatment plant enters the import of evaporimeter primary side by stop valve, flow control valve successively, and the outlet of evaporimeter primary side is communicated with sewage network; The import of evaporimeter secondary side is communicated with by expansion valve with the outlet of condenser primary side, and the evaporimeter secondary side mouth of a river is communicated with by cold medium compressor with the import of condenser primary side; The import of condenser secondary side is communicated with outside tap water supply net or heating net by Heating Cyclic pump group, water tank successively, and the outlet of condenser secondary side is communicated with the hot water user by water tank, conveying pump group successively; Evaporimeter secondary side exit is provided with the pressure sensor that evaporimeter air pressure inside value is sent to controller, and controller output end is connected to motor valve.
In a word, in the sewage waste heat recovery device of the present invention, after condenser primary side cold-producing medium enters the evaporimeter secondary side, carry out heat exchange with the treated sewage from sewage treatment plant of the water of conduct of evaporimeter primary side.In evaporimeter, after the part of waste heat that cold-producing medium absorption sewage carries, by the gaseous state that liquid state is vaporizated into and liquid equality of temperature is pressed together.The cold-producing medium of gaseous state through the cold medium compressor compression after temperature further raise with pressure, enter the running water of condenser primary side and condenser secondary side or the recirculated water that heats carries out heat exchange through the gaseous refrigerant of overcompression.In condenser, the condenser primary side after the running water of the gaseous refrigerant of overcompression and condenser secondary side or heating recirculated water carry out heat exchange, being liquefied through the gaseous refrigerant of overcompression is liquid refrigerant.Liquid refrigerant after being liquefied flows out by the outlet of condenser primary side, and flow through expansion downstream pressure and temperature all are lowered, and afterwards, the cold-producing medium after pressure and temperature all reduce enters the evaporimeter secondary side.Behind the running water or heating recirculated water process water tank flow-dividing control through the running water of heat exchange or heat recirculated water and external complement, running water or heating recirculated water through heat exchange enter the hot water user, and the running water of external complement or heating recirculated water enter condenser and carries out heat exchange.Whole sewage remaining energy removal process is gone round and begun again carries out heat exchange.This shows that sewage waste heat recovery device of the present invention can extract the waste heat in the sewage more fully, and the waste heat that extracts is used for the hot water user with further utilization, so the present invention has the advantages that thermal loss is little, energy utilization rate is higher.
Fig. 2 is that the second of sewage waste heat recovery device of the present invention forms structural representation.As shown in Figure 2, sewage waste heat recovery device of the present invention is exported to the water inlet pipe of described stop valve and described evaporimeter at described evaporimeter primary side by sewage treatment plant and once measures and also be provided with bypass regulator valve between the water pipe.In the practical application, adopt manual mode to regulate bypass regulator valve, can control to a certain extent and enter the treated sewage water yield from sewage treatment plant that evaporimeter is once surveyed.
Among the present invention, be the sewage through secondary or tertiary treatment from the treated sewage of sewage treatment plant.
Among the present invention, the material of evaporimeter and structure have good compatibility to the mechanical admixture in the water and chemical impurity.
Among the present invention, enter evaporimeter before, the temperature of cold-producing medium is that 5 ℃ ~ 20 ℃, pressure are 350 ~ 570kPa.In evaporimeter, after water and cold-producing medium carried out heat exchange, one time coolant-temperature gage descended 5 ℃ ~ 15 ℃, was vaporizated into equality of temperature with the gaseous state of pressing by liquid state behind the cold-producing medium absorbing heat.
Among the present invention, after cold-producing medium compressed through cold medium compressor, refrigerant pressure was increased to 1682kPa, and temperature is increased to and is not less than 90 ℃.
Among the present invention, in condenser, carry out heat exchange through the cold-producing medium of overcompression and from the running water of water tank or the cycling use of water that heats, the water in the water tank heats up gradually, and remains on 55 ℃ ~ 60 ℃; Simultaneously, after the cold-producing medium release heat, it is liquid having gaseous liquefied, ready for circulate next time.
Fig. 3 is the composition structural representation of controller of the present invention.As shown in Figure 3, controller of the present invention comprises memory, comparator; Wherein,
Memory is used for the standard pressure value that storage sets in advance.
Comparator, be used for the evaporimeter air pressure inside value that described pressure sensor sends, the standard pressure value that reads from memory compares: when evaporimeter air pressure inside value during greater than the standard pressure value, send to described motor valve and to reduce the aperture control signal; When evaporimeter air pressure inside value during less than the standard pressure value, sending to described motor valve increases the aperture control signal.
Described motor valve, be used for receive that comparator sends reduce the aperture control signal time, reduce self aperture to reduce the water inflow one time; When receiving the increase aperture control signal that comparator sends, increase self aperture to increase the water inflow one time.
Among the present invention, the controller regulating effect is for guaranteeing that the refrigerant temperature through heat exchange remains on 5 ℃ ~ 20 ℃ in evaporimeter.In the practical application, if the refrigerant temperature through heat exchange is on the low side in evaporimeter, then can cause sewage waste heat recovery device operating efficiency of the present invention to reduce; If the refrigerant temperature through heat exchange in evaporimeter is higher, then can affect the normal operation of cold medium compressor.In addition, running water or heating recirculated water since season etc. environment reason, hot water user's water consumption is difference to some extent also, by sewage waste heat recovery device of the present invention, can be controlled at more accurately the refrigerant temperature of process heat exchange in the evaporimeter, use with convenient.
In the practical application, through in the constant situation of the refrigerant temperature of heat exchange, the condensation temperature of cold-producing medium is higher in evaporimeter, and the shaft power of cold medium compressor is larger, that is, power consumption is more; In the constant situation of the condensation temperature of cold-producing medium, higher through the refrigerant temperature of heat exchange, it is larger that the condenser secondary side exports the heating capacity that heat can the user to.
Among the present invention, described cold-producing medium is HFC-134a R134a.
In sum, more than be preferred embodiment of the present invention only, be not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. sewage waste heat recovery device, it is characterized in that, described waste-heat recovery device comprises for to from the treated sewage of sewage treatment plant and the evaporimeter that carries out heat exchange from the cold-producing medium of condenser, for the cold medium compressor to compressing through the cold-producing medium that gasifies after the heat exchange, be used for the condenser that carries out heat exchange to through the cold-producing medium of overcompression and running water or the recirculated water that heats, be used for by the control of evaporimeter air pressure inside value through the stable controller of refrigerant temperature after the heat exchange, be used for carry out the water tank of flow-dividing control from the running water of outside or heating recirculated water and the running water that advanced heat exchange at condenser or heating recirculated water; Wherein, water tank is with the fluid level controller that prevents from causing water to overflow owing to water level is too high;
Treated sewage from sewage treatment plant enters the import of evaporimeter primary side by stop valve, flow control valve successively, and the outlet of evaporimeter primary side is communicated with sewage network; The import of evaporimeter secondary side is communicated with by expansion valve with the outlet of condenser primary side, and the outlet of evaporimeter secondary side is communicated with by cold medium compressor with the import of condenser primary side; The import of condenser secondary side is communicated with outside tap water supply net or heating net by Heating Cyclic pump group, water tank successively, and the outlet of condenser secondary side is communicated with the hot water user by water tank, conveying pump group successively; Evaporimeter secondary side exit is provided with the pressure sensor that evaporimeter air pressure inside value is sent to controller, and controller output end is connected to motor valve.
2. sewage waste heat recovery device according to claim 1 is characterized in that, is exported to the water inlet pipe of described stop valve and described evaporimeter at described evaporimeter primary side by sewage treatment plant and once measures and also be provided with bypass regulator valve between the water pipe.
3. sewage waste heat recovery device according to claim 1 and 2 is characterized in that, described controller comprises memory, comparator; Wherein,
Memory is used for the standard pressure value that storage sets in advance;
Comparator, be used for the evaporimeter air pressure inside value that described pressure sensor sends, the standard pressure value that reads from memory compares: when evaporimeter air pressure inside value during greater than the standard pressure value, send to described motor valve and to reduce the aperture control signal; When evaporimeter air pressure inside value during less than the standard pressure value, sending to described motor valve increases the aperture control signal;
Described motor valve, be used for receive that comparator sends reduce the aperture control signal time, reduce self aperture to reduce the water inflow one time; When receiving the increase aperture control signal that comparator sends, increase self aperture to increase the water inflow one time.
4. sewage waste heat recovery device according to claim 1 and 2 is characterized in that, the temperature of the cold-producing medium that gasifies after the heat exchange of described process is 5 ~ 20 ℃.
5. municipal wastewater waste-heat recovery device according to claim 1 and 2 is characterized in that, described cold-producing medium is HFC-134a R134a.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104949219A CN102927685A (en) | 2012-11-28 | 2012-11-28 | Waste sewage heat recycling device |
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| CN2012104949219A CN102927685A (en) | 2012-11-28 | 2012-11-28 | Waste sewage heat recycling device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104676952A (en) * | 2013-11-29 | 2015-06-03 | 中煤张家口煤矿机械有限责任公司 | Method for producing hot bath water by use of waste heat of production circulating water |
| CN105198025A (en) * | 2015-10-22 | 2015-12-30 | 西安交通大学 | Integrated design method of salt-containing waste water evaporation crystallization system of waste heat driving heat pump |
| CN105841397A (en) * | 2016-04-06 | 2016-08-10 | 广州万宝集团民权电器有限公司 | Pressure constant-temperature cold water and hot water production system |
| CN112240645A (en) * | 2020-10-23 | 2021-01-19 | 天津城建大学 | Sewage waste heat recovery system and control method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104676952A (en) * | 2013-11-29 | 2015-06-03 | 中煤张家口煤矿机械有限责任公司 | Method for producing hot bath water by use of waste heat of production circulating water |
| CN105198025A (en) * | 2015-10-22 | 2015-12-30 | 西安交通大学 | Integrated design method of salt-containing waste water evaporation crystallization system of waste heat driving heat pump |
| CN105841397A (en) * | 2016-04-06 | 2016-08-10 | 广州万宝集团民权电器有限公司 | Pressure constant-temperature cold water and hot water production system |
| CN112240645A (en) * | 2020-10-23 | 2021-01-19 | 天津城建大学 | Sewage waste heat recovery system and control method thereof |
| CN112240645B (en) * | 2020-10-23 | 2021-10-12 | 天津城建大学 | Sewage waste heat recovery system and control method thereof |
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Application publication date: 20130213 |