Simple and easy dissolving and heat absorbing chemical heat pump and heating thereof or refrigerating method
Technical field
The present invention relates to a kind of simple and easy dissolving and heat absorbing chemical heat pump and heating or refrigerating method, belong to the technical field of heat pumps of utilizing dissolved substance to carry out heat exchange.
Background technology
The chemical heat pump system utilizes the functions such as realizing refrigeration, heating that is converted of heat energy and the chemical energy of reversible reaction in the chemical reaction.Usually solid reactor heat absorption in desorption process, adsorbent solution sucking-off refrigerant gas under high pressure, refrigerant gas enters condensation heat release in the condenser, enters evaporimeter through choke valve again, and refrigerant gas evaporates in evaporimeter, produces to external world refrigeration.On the other hand, the refrigerant gas that is evaporated under lower pressure is adsorbed agent absorption, emits heat, by such circulation, can reach the effect of freezing or heating by chemical heat pump with this.And most Chemisorptions greatly mainly with inorganic salts as adsorbent such as MgCl2, CaCl2, SrCl2 or BaCl2 etc., and ammonia to be cold-producing medium form working medium pair is freezed or is heated by the heat release between gas and the salt and heat absorption reversible reaction.But this structural chemistry heat pump is comparatively complicated, in addition lower in metal chloride thermal conductivity in reaction bed, so that the working effect of chemical heat pump is unsatisfactory, therefore can not be matched in large-area heat exchange requirement.
Disclose in addition at present a kind of to be used for being dissolved in the ammonium nitrate solution of water as the dissolving and heat absorbing chemical heat pump of working medium, dissolving and heat absorbing when low temperature, and the heat release of high temperature condensing crystallizing, utilize the latent heat of melting of working medium, little to reach energy consumption, simple in structure, free from environmental pollution characteristics.But the chemical heat pump of this structure is provided with heater at tower bottom, the ammonium nitrate solution of tower bottom is heated between 100-105 ℃, utilize the high temperature ammonium nitrate solution to be concentrated to very high concentration, at the bottom of tower, form the high temperature enrichment region, and ammonium nitrate solution concentration is high, density is large, the ammonium nitrate solution that has high-temperature high concentration at the bottom of the tower, by working medium pump the ammonium nitrate solution of high-temperature high concentration is pumped to cat head again, in course of conveying, the ammonium nitrate solution of high-temperature high concentration in working medium pump with the main frame tower in cryogenic fluid carry out heat exchange cooling, and wash rice goes out ammonium nitrate crystals, outwards emit simultaneously a large amount of latent heat of meltings, the low temperature heat absorption district that working medium pump is delivered to top of tower with the ammonium nitrate crystals in the pump dissolving of absorbing heat, and cryogenic fluid by the top densification network again in the main frame tower of bottom with working medium pump in the ammonium nitrate solution of high-temperature high concentration carry out heat exchange and circulate with this.But because the ammonium nitrate solution of high-temperature high concentration is positioned at tower bottom, and low-temperature and low-concentration solution is positioned at top of tower, on the one hand the ammonium nitrate solution of the low-temperature and low-concentration of top of tower is difficult to carry out freely dissolving with the ammonium nitrate solution of the high-temperature high concentration of bottom mix, and causes working medium reliably not circulate and reaches the effect of heat exchange.On the other hand, because heater is the ammonium nitrate solution heating to tower bottom, and heated ammonium nitrate solution can produce certain water vapour after concentrated, and high-temperature water vapor can move to the middle and upper part of tower body, so can't form high-temperature region, bottom, the heat release zone at middle part and the end warm area at top in the tower, in fact can't carry out heat exchange.
Summary of the invention
It is stable to the purpose of this invention is to provide a kind of simple in structure, heat exchange efficiency, the simple and easy dissolving and heat absorbing chemical heat pump that use cost is low and heating or refrigerating method.
The present invention for the technical scheme that achieves the above object is: a kind of simple and easy dissolving and heat absorbing chemical heat pump, it is characterized in that: comprise evaporimeter, reactor, air compressor and solid-liquid separator and circulation heat exchanger, described evaporimeter comprises container for evaporation and is arranged on the interior cold junction heat exchanger tube of container for evaporation, the cold junction heat exchanger tube communicates with the cold junction user media by pipeline, and the bottom of container for evaporation and top are connected to respectively carrier pipe and return duct; Described reactor comprises reaction vessel, be arranged on the condensing heat-exchanging pipe on reaction vessel top and the hot junction heat exchanger tube of reaction vessel bottom, carrier pipe is positioned at container for evaporation one side circulating pump is installed, the intensification pipe of carrier pipe by circulation heat exchanger be connected transition conduit to be connected with two above liquid distributors that are arranged on the reaction vessel inner top to communicate, and each liquid distributor is provided with a plurality of liquid outlets, the steam pipe that is connected on the reaction vessel passes through air compressor, condensing heat-exchanging pipe and backflow transition conduit are connected with the cooling pipe of circulation heat exchanger and communicate, hot junction heat exchanger tube in the reaction vessel communicates with the hot junction user media by pipeline, between reaction container bottom and the container for evaporation top solid-liquid separator is installed, solid-liquid separator communicates with reaction vessel and container for evaporation respectively by feed tube and drain pipe, and the liquid return hole of solid-liquid separator communicates with the top of reaction vessel through liquid back pipe.
Simple and easy dissolving and heat absorbing chemical heat pump of the present invention and heating or refrigerating method, it is characterized in that: will be lower than 15 ℃ cold junction user media and pass into the cold junction heat exchanger tube that is arranged in the container for evaporation and circulate, and the solid-liquid ammonium nitrate working medium in the evaporimeter heated, solid-liquid ammonium nitrate working medium heat absorption dissolving in the evaporimeter also remains on-10 ℃~0 ℃, after by circulating pump liquid ammonium nitrate working medium being delivered in the intensification pipe of circulation heat exchanger further heat exchange, deliver to again in the liquid distributor of reactor inner top, by liquid distributor liquid ammonium nitrate working medium being sprayed at pressure is that the top of the reactor of 0.1Mpa~0.18Mpa is further heated to evaporating state, make the liquid ammonium nitrate working medium on reaction vessel top concentrated saturated, water vapour further improves the temperature of water vapour by the air compressor compression by the steam pipe of reactor head, water vapour after the heating is passed in the condensing heat-exchanging pipe in the reactor, liquid ammonium nitrate working medium after spraying in the reactor is carried out heat exchange, condensed water in the condensing heat-exchanging pipe of reactor is back to container for evaporation through the cooling pipe of circulation heat exchanger, and the liquid ammonium nitrate working medium that flows out from evaporimeter is carried out heat exchange; Liquid ammonium nitrate working medium after reactor top is concentrated saturated enters the bottom of reaction vessel and carries out the heat release crystallization, hot junction user media to the hot junction heat exchanger tube of reaction vessel bottom heats, solid-liquid ammonium nitrate working medium after the heat exchange enters carries out Separation of Solid and Liquid in the solid-liquid separator, solid-state ammonium nitrate working medium enters in the evaporimeter, liquid ammonium nitrate working medium is sent in the reactor again, realizes the cooling of cold junction user media and the heating of hot junction user media.
The present invention is with evaporimeter, reactor, air compressor and solid-liquid separator, circulation heat exchanger rationally connects by pipeline, make solid-liquid ammonium nitrate working medium in evaporimeter with the heat exchange of cold junction user media, continuously the cold junction user media is freezed, solid-liquid ammonium nitrate working medium realizes low temperature heat absorption dissolving, after making liquid ammonium nitrate working medium by the circulation heat exchanger heating, deliver to again in the liquid distributor of reactor inner top, liquid ammonium nitrate working medium is sprayed at reactor, and be further heated to evaporating state, when liquid ammonium nitrate working medium concentrates saturated, form water vapour and concentrated saturated after liquid ammonium nitrate working medium, water vapour is by the rear further heating of air compressor compression, the liquid ammonium nitrate working medium that spray on reactor top is carried out heat exchange, guarantee that reactor top can stablize the evaporating state that liquid ammonium nitrate working medium is reached capacity.The present invention will be after the heat exchange condensed water pass into further heat exchange in the cooling pipe of circulation heat exchanger, can make fast chemical heat pump enter the recurrent state of working medium work, utilize heat to greatest extent and carry out heat exchange, rational in infrastructure, simple, heat exchange efficiency is stable.The present invention carries out the heat release crystallization at reactor lower part by saturated liquid ammonium nitrate working medium, and the hot junction user media in the heat exchanger tube of hot junction is carried out heat exchange, thus successively the hot junction user media is heated to high temperature, and have preferably heating effect.The present invention circulates ammonium nitrate solution cold junction user media, hot junction user media is changed and liquid ammonium nitrate working medium circulates in evaporimeter and reactor, reach required heat absorption dissolving, crystallization heat release and condensation, the ammonium nitrate working medium circulation is stable, it is low to consume energy, can freeze, can heat again, or rotate cooling and warming with it, or freeze simultaneously and heat with it, use cost is low.
Description of drawings
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is the structural representation of the simple and easy dissolving and heat absorbing chemical heat pump of the present invention.
Wherein: 1-circulating pump, 2-evaporimeter, 2-1-cold junction heat exchanger tube, 2-2-container for evaporation, the 3-control valve, the 4-solid-liquid separator, 5-returns liquid pump, the 6-liquid back pipe, the 7-reactor, 7-1-hot junction heat exchanger tube, 7-2-reaction vessel, 7-3-heater, the 7-4-condensing heat-exchanging pipe, the 7-5-liquid distributor, the 8-steam pipe, 9-carries transition conduit, the 10-air compressor, 11-backflow transition conduit, 12-circulation heat exchanger, the 12-1-pipe of lowering the temperature, the 12-2-pipe that heats up, 13-return duct, 14-carrier pipe, 15-Pressure gauge.
The specific embodiment
As shown in Figure 1, simple and easy dissolving and heat absorbing chemical heat pump of the present invention, comprise evaporimeter 2, reactor 7, air compressor 10 and solid-liquid separator 5 and circulation heat exchanger 12, this circulation heat exchanger 12 is conventional plate type heat exchanger, the present invention adopts aqueous ammonium nitrate solution as working medium, evaporimeter 2 comprises container for evaporation 2-2 and is arranged on the interior cold junction heat exchanger tube 2-1 of container for evaporation 2-2, cold junction heat exchanger tube 2-1 communicates with the cold junction user media by pipeline, the cold junction user media is circulated in cold junction heat exchanger tube 2-1 and carry out heat exchange, there is mass concentration in the container for evaporation 2-2 of the present invention and is 47%~54% aqueous ammonium nitrate solution, be liquid ammonium nitrate working medium and solid-state ammonium nitrate working medium, make the interior ammonium nitrate Temperature of Working of container for evaporation 2-2 between-10 ℃~0 ℃, this cold junction user media is lower than 15 ℃ when entering cold junction heat exchanger tube 2-1, as at the cold junction user media that is 5~15 ℃, and the solid-liquid ammonium nitrate working medium in the container for evaporation 2-2 absorbs heat and the dissolving of cold junction user media, make the cold junction user media after container for evaporation 2-2 exchange, be reduced to-10~5 ℃, satisfy user's requirement of freezing, the bottom of container for evaporation 2-2 and top are connected to respectively carrier pipe 14 and return duct 13.
As shown in Figure 1, reactor 7 of the present invention comprises reaction vessel 7-2, be arranged on the condensing heat-exchanging pipe 7-4 on reaction vessel 7-2 top and the hot junction heat exchanger tube 7-1 of reaction vessel 7-2 bottom, the pressure of reaction vessel 7-2 is controlled at 0.1Mpa~0.18Mpa during work, such as 0.12Mpa, 0.15Mpa or 0.16Mpa, carrier pipe 14 is positioned at container for evaporation 2-2 one side circulating pump 1 is installed, carrier pipe 14 by circulation heat exchanger 12 intensification pipe 12-2 and carry transition conduit 9 to be connected with two that are arranged on reaction vessel 7-2 inner top above liquid distributor 7-5 to communicate, each liquid distributor 7-5 is provided with a plurality of liquid outlets, can arrange according to the container size, can be provided with 10~500 liquid outlets, the intensification pipe 12-2 that liquid ammonium nitrate working medium is delivered to circulation heat exchanger 12 by circulating pump 1 carries out heat exchange, the liquid ammonium nitrate working medium of inciting somebody to action-10 ℃~0 ℃ by circulation heat exchanger 12 is heated to 120~130 ℃, because carrying transition conduit 9 to be connected with two that are arranged on reaction vessel 7-2 top above liquid distributor 7-5 communicates, so the liquid ammonium nitrate working medium that will be heated to 120~130 ℃ is delivered to the liquid distributor 7-5 of reaction vessel 7-2 inner top, liquid ammonium nitrate working medium is sprayed and atomize by each liquid outlet, preferably on each liquid outlet on the liquid distributor 7-5 shower nozzle is installed, liquid ammonium nitrate working medium is further heated in reaction vessel 7-2 again and be concentrated into saturated, evaporation, the steam pipe 8 that is connected to reaction vessel 7-2 top is connected with condensing heat-exchanging pipe 7-4 in the reaction vessel 7-2 by air compressor 10 and communicates, make vapor (steam) temperature improve again 25~35 ℃ by 10 pairs of water vapour compressions of air compressor, this water vapour heats the liquid ammonium nitrate working medium in the reaction vessel 7-2 by condensing heat-exchanging pipe 7-4, can under 135 ℃~145 ℃ temperature, can continuously evaporate with the liquid ammonium nitrate working medium that keeps reactor 7 tops, condensing heat-exchanging pipe 7-4 in the reactor 7 and backflow transition conduit 11 are connected with the cooling pipe 12-1 of circulation heat exchanger 12 and communicate, condensed water liquid towards ammonium nitrate working medium after heat exchange is in circulation heat exchanger 12 interior further heat exchange, to take full advantage of heat energy, the hot junction heat exchanger tube 7-1 of reaction vessel 7-2 bottom communicates with the hot junction user media, the hot junction user media carries out heat exchange in the heat exchanger tube 7-1 of hot junction, make and enter the hot junction user media and be heated to 120~130 ℃ from 10~30 ℃, the effect of the heating that reaches a high temperature.As shown in Figure 1, reaction vessel 7-2 of the present invention middle part has the neck of closing in, or the middle part of reaction vessel 7-2 is provided with the dividing plate with small opening, and the top of neck or the top of dividing plate are equipped with heater 7-3, can guarantee reactor 7 interior liquid ammonium nitrate working medium required saturated evaporation and temperature of heat release crystallization when original state.
As shown in Figure 1, reaction vessel 7-2 of the present invention middle part communicates, make the bottom of the concentrated saturated liquid ammonium nitrate working medium inflow reaction vessel 8-3 on reaction vessel 8-3 top, liquid ammonium nitrate working medium in the condensing heat-exchanging pipe 7-4 of reaction vessel 7-2 is carried out heat exchange, make the liquid ammonium nitrate working medium of reaction vessel 7-2 bottom emit crystallization heat, form solid-liquid ammonium nitrate working medium, solid-liquid ammonium nitrate Temperature of Working after the heat exchange is in 70 ℃~90 ℃, the temperature of lower of reaction vessel 7-2 is controlled in 120 ℃~130 ℃, and upper temp is at 135 ℃~145 ℃.As shown in Figure 1, the present invention is equipped with solid-liquid separator 5 between reaction vessel 7-2 bottom and container for evaporation 2-2 top, solid-liquid separator 5 communicates with reaction vessel 7-2 and container for evaporation 2-2 respectively by feed tube and drain pipe, these solid-liquid separator 5 commercially available prod, and the liquid return hole of solid-liquid separator 5 communicates by the top of liquid back pipe 6 with reaction vessel 7-2, liquid pump 4 is installed back on the liquid back pipe 6, and solid-state working medium then flows in the container for evaporation 2-2 of bottom, realizes working medium circulation.
As shown in Figure 1, the present invention installs control valve 3 for ease of keeping in repair, debug and observing on the feed tube of solid-liquid separator 5 and the drain pipe, be separately installed with the Pressure gauge 15 of control valve 3 on carrier pipe 14 and the steam pipe 8.
As shown in Figure 1, the heating of the simple and easy dissolving and heat absorbing chemical heat pump of the present invention or refrigerating method, to be lower than 15 ℃ cold junction user media passes into the cold junction heat exchanger tube 2-1 that is arranged in the container for evaporation 2-2 and circulates, and to the heating of the solid-liquid ammonium nitrate working medium in the evaporimeter 2, make evaporimeter 2 interior solid-liquid ammonium nitrate working medium heat absorption dissolvings and remain on-10 ℃~0 ℃, at this moment, the mass concentration of solid-liquid ammonium nitrate working medium is 47%~54%, after by circulating pump 1 liquid ammonium nitrate working medium being delivered among the intensification pipe 12-2 of circulation heat exchanger 12 further heat exchange, make liquid ammonium nitrate working medium be heated to 120~130 ℃, liquid ammonium nitrate worker after the heating is delivered in the liquid distributor 7-5 of reactor 7 inner tops again, by liquid distributor 7-5 liquid ammonium nitrate working medium being sprayed at pressure is that the top of the reactor 7 of 0.1Mpa~0.18Mpa is further heated to evaporating state, liquid ammonium nitrate working medium is concentrated saturated, pressure in the reactor 7 of the present invention is absolute pressure, water vapour further improves the temperature of water vapour by air compressor 10 compressions by the steam pipe 8 at reactor 7 tops, make water vapour can improve again 25~35 ℃, water vapour behind air compressor 10 passes in the condensing heat-exchanging pipe 7-4 on reactor 7 tops, liquid ammonium nitrate working medium after the spraying in the reactor 7 is carried out heat exchange, continuously evaporate with the liquid ammonium nitrate working medium that keeps reactor 7 tops, at this moment, the mass concentration of liquid ammonium nitrate working medium is 80%~90%, and the condensed water in the condensing heat-exchanging pipe 7-4 is back to container for evaporation 2-2 through the cooling pipe 12-1 of circulation heat exchanger 12, and the liquid ammonium nitrate working medium that flows out from evaporimeter 2 is carried out heat exchange.As shown in Figure 1, liquid ammonium nitrate working medium after the reactor 7 top evaporation and concentration of the present invention enters its underpart and carries out the heat release crystallization, hot junction user media in the heat exchanger tube 7-1 of hot junction is heated, former 10~30 ℃ hot junction user media can be heated to 120~130 ℃, liquid ammonium nitrate Temperature of Working after the crystallization heat release is at 70 ℃~90 ℃, the temperature control of reactor 7 bottoms is at 120 ℃~130 ℃, liquid ammonium nitrate working medium is stablized heat release and is formed solid-liquid ammonium nitrate working medium, solid-liquid ammonium nitrate working medium after heat exchange enters carries out Separation of Solid and Liquid in the solid-liquid separator 5, solid-state ammonium nitrate working medium enters in the evaporimeter 2, liquid ammonium nitrate working medium is sent in the reactor 7 by returning liquid pump 4 again, circulate with this, realize the cooling of cold junction user media and the heating of hot junction user media.