A kind of residual neat recovering system that impure intermittence heating is produced for waste water source
Technical field
The present invention relates to a kind of chemical plant waste-heat recovery device, relate in particular to the residual neat recovering system that impure intermittence heating is produced for waste water source.
Background technology
For chemical plant, the low-temperature wastewater of its generation is by treatment system or directly discharge the huge heat-energy losses of meeting formation, makes chemical plant capacity usage ratio low, not only causes mass energy waste, has also seriously polluted environment simultaneously.Along with the development of heat pump techniques, the particularly appearance of large high-temperature water resource heat pump, makes chemical plant low-temperature wastewater waste heat recovery will become possibility.In addition, absorption heat pump formula is to rely on driving heat source operation, the temperature that absorbs low-temperature heat source water is transferred to the equipment of middle warm water, it when unit operation, is the temperature that continuously absorbs low-temperature heat source, but when there is cutout in low-temperature heat source water, namely can not provide continuously heat, and unit is now still in continuous heat absorption, the temperature of the heat exchanger of absorption heat pump low temperature water inlet front end will sharply decline so, until residual water freezing in pipe, after water build-ups ice, volume can become large, thereby burst low-temperature heat exchange device, whole system paralysis, and there is the problem of a large amount of impurity in the spent hot water in current chemical plant, greatly affect the efficiency of plate type heat exchanger, cannot make full use of existing spent hot water's heat.And existing hot-air acquisition methods is to obtain by the new wind of Steam Heating, this part steam need to spend to buy.
Summary of the invention
Technology of the present invention is dealt with problems and is: the problem for existing for the discontinuous residual neat recovering system by air heat of waste water source in prior art, provides a kind of residual neat recovering system.
Technical solution of the present invention is: a kind of residual neat recovering system that impure intermittence heating is produced for waste water source, comprise absorption heat pump, front water tank, filter, air preheater, water pump, rear water tank, the first plate type heat exchanger and the second plate type heat exchanger, wherein absorption heat pump is divided into generator part, evaporator section, absorber part and condenser portion, generator part be input as chemical plant steam-out (SO), be output as condensed water; The output of evaporator section is connected with the second plate type heat exchanger, evaporator section be input as running water, running water forms recirculated water by evaporimeter, water pump and second plate type heat exchanger of absorption heat pump, this recirculated water absorbs heat from the second plate type heat exchanger, bring heat into after evaporimeter release heat, and then get back to the second plate type heat exchanger heat absorption; After the spent hot water in chemical plant stores by front water tank, become continuous spent hot water, pass through again filter by impurity filtering, input as the first plate type heat exchanger, spent hot water after the cooling of the output of the first plate type heat exchanger is as the input of the second plate type heat exchanger, enters the spent hot water who becomes low temperature after secondary heat exchange and discharges; After low temperature clear water once heats up after the first plate type heat exchanger, as the input of the absorber part of absorption heat pump, the output of absorber part is connected with the input of condenser; Clear water after once heating up is after absorption heat pump carries out secondary temperature elevation, again through forming circulation clear water after water tank and air preheater later, circulation clear water heats cold wind (new wind) in air preheater, output warm-air supply user, to meet consumers' demand, save this part new wind-warm syndrome and risen the steam of required consumption, reached energy-conservation object.
The present invention's advantage is compared with prior art: the present invention realizes waste heat recovery by the heat exchange method of absorption heat pump, reclaim the spent hot water in chemical plant, before utilizing, water tank becomes continuous state by waste water, then after being connected with plate type heat exchanger, tap water heating is formed to recirculated water, clear water is undertaken after secondary temperature elevation by the first plate type heat exchanger and absorption heat pump, by rear water tank and water pump and air preheater, by cold air heating, it is hot blast, to meet the demand of user to technique, whole system has been realized abundant recycling and the heat supply of waste water by two plate type heat exchangers, improve heat utilization rate, effectively save the energy.
Accompanying drawing explanation
Fig. 1 is the residual neat recovering system structural representation that impure intermittence heating is produced for waste water source of the present invention.
The specific embodiment
A kind of residual neat recovering system that impure intermittence heating is produced for waste water source, as shown in Figure 1, comprise absorption heat pump, front water tank, filter, air preheater, water pump, rear water tank, the first plate type heat exchanger and the second plate type heat exchanger, wherein absorption heat pump is divided into generator part, evaporator section, absorber part and condenser portion, generator part be input as chemical plant steam-out (SO), be output as condensed water; The output of evaporator section is connected with the second plate type heat exchanger, evaporator section be input as running water, running water forms recirculated water by evaporimeter, water pump and second plate type heat exchanger of absorption heat pump, this recirculated water absorbs heat from the second plate type heat exchanger, bring heat into after evaporimeter release heat, and then get back to the second plate type heat exchanger heat absorption; After the spent hot water of chemical plant 60 degree or higher temperature stores by front water tank, become continuous spent hot water, pass through again filter by impurity filtering, input as the first plate type heat exchanger, after the cooling of the output of the first plate type heat exchanger 40 degree spent hot water, as the input of the second plate type heat exchanger, enters the spent hot water who becomes about low temperature 20 degree after secondary heat exchange and discharges; Low temperature clear water is as the input of the absorber part of absorption heat pump, and the output of absorber part is connected with the input of condenser; After low temperature 20 degree (mean annual temperature) clear water once heat up after the first plate type heat exchanger, become 60 degree left and right, as the input of the absorber part of absorption heat pump, the output of absorber part is connected with the input of condenser; Clear water after once heating up carries out secondary temperature elevation through absorption heat pump and becomes after 85~90 degree, again through forming circulation clear water after water tank and air preheater later, circulation clear water heats cold wind in air preheater, it by the cold air heating of 20 degree, is the hot blast of 70 degree, then supply with user, to meet user's requirement.
It should be noted that, the water tank of that side that is positioned at the evaporator section of absorption heat pump is called front water tank, and the water tank of that side that is positioned at the condenser portion of absorption heat pump is called rear water tank.
The content not being described in detail in description of the present invention belongs to the known prior art of professional and technical personnel in the field.