CN101619943A - Opposite double current heat energy exchange and recovery technology - Google Patents

Abstract

The invention relates to a technique capable of almost completely recovering heat energy in a fuel containing heat (or gas containing heat). By utilizing successive conduction exchange of temperature difference in opposite flowing process of hot and cooled liquid (or hot and cooled gas, or hot gas and cooled liquid, or hot liquid and cooled gas) in a pipeline, finally the heat energy in the liquid containing heat (or gas containing heat) is almost completely exchanged and recovered and is recycled, thus achieving the aim of saving energy.

Description

Heat energy exchanging and recovering technology with two face-to-face flows

Affiliated technical field

The present invention relates to energy-saving field, is a kind of heat energy exchange and recovery technology.Utilize this technology the heat energy that contains hot liquid (for example discarded hot water), contain in the hot gas (for example discarded hot gas) can be close to whole exchanges recovery, recycle, reach energy-conservation purpose.

Technical background

The heat energy Sui Shui that contain hot liquid (for example discarded hot water) at present, contains hot gas in (for example discarded hot gas), losing with air-flow, is energy waste.Though some local having carried out utilizes again, the scope of application is limited, and does not have the energy recovery meaning.

Summary of the invention

In order to make the ubiquitous heat energy that contains hot liquid (for example discarded hot water), contains in the hot gas (for example discarded hot gas) obtain easily reclaiming, the invention provides a kind of heat energy recovering method, its heat energy recovery rate can reach peak.

Technical scheme of the present invention (being recovered as example with the exchange to discarded hot water heat energy) is: 1, an interior diameter be 47 millimeters built-in 7 equal lengths of the big pipe of the plastic-steel that does not readily conduct heat, etc. bore, equidistantly the strong little pipe of stainless steel of conductivity of heat (1 little pipe is in great circle tube hub part as hot channel, be concentric circles with big pipe promptly, all the other 6 little pipes are evenly distributed on big pipe institute complementary space position).Every radiating tube (little pipe, down with) interior diameter is 12 millimeters, and pipe thickness is 0.5 millimeter, is 0.5 millimeter stainless steel substrates connection (both played the bracing frame effect, and strengthened radiating effect again) that conductivity of heat is strong with thickness between each radiating tube.Hot channel is isometric with big pipe, and length is 3000 meters.Hot channel is discarded flow of hot water pipeline, and institute's complementary space is cold water (running water) passage in the big pipe.Big pipe external application heat-insulation layer.Big round pipe coiled spiral becomes to erect cylinder and erects.Cylinder adds deposited heat-insulation layer.2, end entrance is established discarded hot water inlet on the hot channel, and the lower end outlet is the waste water flow export; (cold) running water inlet is established in big pipe lower end, the upper end is the outlet of (hot) running water.Flowmeter and control gate valve are all installed by discarded water out and running water inlet place.

Above-mentioned Various types of data only is the case that the present invention conceives technical scheme, a kind of in other words parameter, especially duct length, realize that heat energy recovery rate of the present invention can reach the target of peak, both can in hot channel, realize with suitable duct length (the hardware mechanical length in the technical scheme) under the natural flows speed state at discarded hot water, also can be shorter than when requiring length, make heat, cold water in pipeline, have the suitable conductive thermal exchange time (the software operation method in the technical scheme) to realize with artificial regulation and control water velocity at duct length; Even if hardware machinery (pipeline) length in the technical scheme, also because of the thickness degree of single radiating tube is that what, the difference of all kinds of factors such as heat dispersion of thickness, natural flows speed (natural flows speed is different in the radiating tube of different hydraulic pressure, different thicknesses radiating tube and unlike material) and the radiating tube material of radiating pipe wall of the built-in radiating tube radical of same big pipe is different, even great disparity is very big.Therefore as " method ", the general statement of its technical scheme (being recovered as example with the exchange to heat energy in the discarded hot water) is: 1, the built-in some equal lengths of the big pipe of a plastic-steel that does not readily conduct heat, etc. bore, the little pipe of stainless steel that equally spaced conductivity of heat is strong as hot channel, connect (not only play the bracing frame effect but also can strengthen radiating effect) with the strong stainless steel substrates of conductivity of heat between radiating tube (little pipe, down together).The circle gross area equated (or being bordering on equal) with big pipe residue cross-sectional area in the whole little pipes of hot channel were transversal.Hot channel equates with the great circle length of tube.Hot channel is discarded hot water flow passage, and big pipe institute complementary space is cold water (running water) passage.Great circle mouth of pipe footpath according to discarded hot water flow formulate, (natural temperature when discarded hot water enters big pipe with running water during outflow after the radiating tube heat radiation is identical to produce a desired effect for length (the hardware mechanical length in the length technical scheme when referring to discarded hot water heat, cold water obtaining the heat energy recovery rate peak in pipeline interior heat conduction exchange back under dirty naturally speed state in radiating tube); The running water temperature that pipeline absorbs heat when arriving delivery port and flowing out on the way of flowing through is identical with the discarded hot water temperature at discarded hot water inlet place) be suitable length.This length can obtain with simple experiment: be higher than the pipeline of estimating Len req by technical scheme claimed apparatus one, some distances of every interval are gone into the temperature indicating device value in the ducted running water on pipeline, when the temperature demonstration was identical with the discarded hot water temperature who discards hot water inlet port place, the duct length at this place was suitable length.Should be pointed out that technical scheme of the present invention comprises hardware mechanical device and software operation method two parts, they are complementary.Even hardware machinery (pipeline) length does not reach Len req, also can promptly regulate control gate valve people and slow down that water velocity makes heat, cold water have the suitable conductive thermal exchange time to reach the target of heat energy recovery rate peak in the pipeline in pipeline with the software operation method.Even if with regard to the hardware mechanical device, duct length is that what, the difference of all kinds of factors such as heat dispersion of thickness, natural flows speed (water velocity of discarded hot water is different in different hydraulic pressure, different thicknesses radiating tube and unlike material radiating tube) and the radiating tube material of radiating pipe wall of radiating tube radical is different in the same big pipe because of the thickness degree of single radiating tube also, even great disparity is huge.Therefore do not provide the concrete concluding data of duct length here, and only provide " method " that obtains suitable length.Big pipe external application heat-insulation layer.Big round pipe is erect, and when pipeline is longer, can become to erect cylinder by coiled spiral.Cylinder adds deposited heat-insulation layer.2, end entrance is established discarded hot water inlet on the hot channel, the lower end outlet is the waste water flow export; (cold) running water inlet is established in big pipe lower end, the upper end is the outlet of (hot) running water.Flowmeter and control gate valve are all installed by discarded water out and cold running water import department.

(1) when duct length meets the requirements length: discarded hot water is entered by the discarded hot water inlet in radiating tube upper end, naturally flow downward, do not stop heat is conducted to the running water in the big pipe by hot channel, self temperature constantly descends, when being flowed out by outlet at bottom at last, water temperature is identical with the running water natural temperature of running water inlet port; Cold running water is entered by the cooling water inlet of big pipe lower end, upwards flows under tap water pressure, does not stop on the way to absorb the heat that the radiating tube conduction comes, and temperature constantly rises.Regulate running water control gate valve and make tap water flow velocity identical with the discarded flow rate of hot water that flows downward, when running water was flowed out by the upper end outlet at last, the water temperature discarded hot water temperature with at this moment discarded hot water inlet was identical.This is reclaimed hot water send into the standby or direct use of insulation water storing tank.

(2) when duct length is shorter than necessary requirement length: discarded hot water is entered by radiating tube upper end hot water inlet, naturally flow downward, do not stop heat is conducted to the running water in the big pipe by tube wall, self temperature constantly descends, regulate discarded hot water control gate valve and slow down discarded flow rate of hot water, prolong its heat radiation time in hot channel, when it was flowed out by outlet at bottom at last, water temperature was identical with the running water natural temperature of running water inlet port; Cold running water is entered by the cold running water import of big pipe lower end, under tap water pressure, upwards flow, do not stop to absorb the heat that the radiating tube conduction comes on the way, temperature constantly rises, regulate running water control gate valve, make the running water water velocity identical with the discarded flow rate of hot water that flows downward, when running water was flowed out by the upper end delivery port at last, water temperature was identical with the discarded hot water temperature who discards the hot water inlet port this moment.This is reclaimed hot water send into the standby or direct use of insulation water storing tank.

The invention has the beneficial effects as follows: heat, cold water are identical mobile with same uniform flow, equal flow in the pipeline of highly insulation, do not stop the heat-shift equalization temperature, as long as duct length is suitable, perhaps make water velocity suitable, make heat, cold water that the suitable conductive thermal exchange time be arranged in pipeline, can think that in theory the heat energy that enters ducted discarded hot water can all exchange in the running water that is recovered to big pipe.Device is simple, reclaims hot water and discarded water equivalent (or near equivalent), and actual use is convenient in water saving again.

As long as exit and lower end import department installation air pressure modulator on the big pipe of aforementioned means (annotate: the device material should be different because of gas with various, different liquids, with corrosion-resistant, high temperature resistant, high pressure resistant be degree); The outlet of radiating tube lower end connects the exhaust chimney of putting in addition (annotate: the chimney height is advisable with the unobstructed discharge of waste gas with to the ambient influnence minimum) can exchange recovery (seeing embodiment 3 for details) to the heat energy that contains in the hot gas

The specific embodiment

Embodiment 1: every place that discarded hot water emission is arranged, all can take technology provided by the present invention to carry out energy recovery: pipeline is installed in discarded hot water emission's mouth below, make radiating tube upper end water inlet be lower than hot water emission's water level, so that discarded hot water can flow to radiating tube (attention makes and is full of circulating water in the radiating tube, the air foreign material is mixed enter) automatically; Connect the running water of lower end of duct cooling water inlet.(1) when the duct length length (natural temperature of the water temperature of discarded hot water when flow out radiating tube heat radiation back when this moment, running water entered big pipe is identical) that meets the requirements, regulates running water water inlet gate valve according to the equal running water flow of discarded hot water flow formulation.Running water flow through pipeline absorb heat on the way flow out into hot water by the upper end at last after, or directly use, or it is standby to send into the insulation water storing tank.(2) temperature when duct length does not reach the promptly discarded hot water of Len req from the outlet outflow of hot channel lower end is higher than the running water natural temperature of running water inlet port this moment, should regulate discarded water out gate valve, slow down the discarded flow velocity of hot water in hot channel, prolong heat, the conductive thermal exchange time of cold water in pipeline, the natural temperature when making the water temperature of discarded hot water when flow out hot channel heat radiation back and running water entering big pipe at this moment is identical; Regulate running water water inlet gate valve and formulate equal running water flow according to discarded discharge.Running water flow through pipeline absorb heat on the way at last flow out into hot water by the upper end outlet after, or use directly, or send into that to be incubated water storing tank standby.

Embodiment 2: to the sterilization operation of heating of liquid such as soy sauce, beverage, wherein heat energy reclaims again: on aforementioned techniques scheme device basic, (heater should be able to show fluid temperature automatically, and moves automatically in range of set temperature: heat automatically when fluid temperature is lower than design temperature to put a liquid heater again; When fluid temperature is higher than design temperature, stop heating automatically), its liquid-inlet and round pipe upper end hot liquid outlet greatly (hot tap-water outlet, down together) are communicated with; Its liquid outlet and hot channel upper end temperature liquid import up to standard (discarded hot water inlet, down together) are communicated with.The bed rearrangement device is placed in the liquid storage tank water level lower end certain distance of need heating, so that there is enough pressure that liquid can unobstructed naturally flowing be advisable in pipeline.Need are added geothermal liquid inject the pipeline that is communicated with the cold liquid-inlet of great circle lower end of duct (cold running water import) by eminence, this liquid enters big pipe and upwards flows naturally, enter the heater of connection again from the outlet outflow of big pipe upper end, heater via heat automatically (this moment fluid temperature obviously be lower than the heater design temperature, so heater opens work automatically) be warming up to sterilization temperature required (having set heating-up temperature in advance) back and flow to temperature liquid import up to standard on the hot channel naturally, by radiating tube its thermal energy conduction is exchanged to adding geothermal liquid in the big pipe in the process that in radiating tube, flows downward, self temperature constantly descends, and has become the manufactured goods under the natural temperature when being flowed out by the lower end outlet at last; Simultaneously, the cold liquid that need heat successively enters big pipe, is upwards constantly absorbing the heat that the radiating tube conduction comes on the way in the flow process, and temperature continues to rise, when flowing to the outlet of big pipe upper end at last, fluid temperature with require temperature (heater sets temperature) identical.Here to point out, so say in theory height insulation measure is arranged although big round pipe is gone up in practice, but some thermal losses are always arranged, therefore work as the fluid temperature that flows out and be lower than the requirement temperature, heat temperature raising was extremely temperature required automatically for the meeting quilt when this liquid was flowed through heater, to guarantee sterilization effect.This liquid up to standard flows out heater and then flows to hot channel, and self high temperature heat need be added geothermal liquid in radiating tube conducts to big pipe, flows out into manufactured goods from the outlet of hot channel lower end at last.So, thermal energy exchange reclaims circulation constantly.

Basic operation is referring to embodiment 1.

Embodiment 3: the exchange that contains the middle heat energy of hot gas (is example with discarded hot gas) is reclaimed: pipeline is installed in discarded hot air discharge mouth top, is higher than discarded hot gas generation position with gas outlet, radiating tube lower end and is advisable.(1) with water thermal medium: will discard hot gas and feed radiating tube upper end import, running water is inserted from the lower end of duct import.Hot gas exchanges to thermal energy conduction in the running water through radiating tube, be equal to or less than 100 ℃ if enter the discarded hot air temperature of radiating tube, regulate the running water flow, make the temperature of running water when the upper end outlet is flowed out identical with the discarded hot air temperature that enters radiating tube upper end import this moment.It is standby that the hot water that flows out directly uses or send into the insulation water storing tank.If enter the discarded hot air temperature of radiating tube greater than 100 ℃, should control the running water flow, make water in pipeline, be boiled into steam, and adjusting pneumatic control valve, decide air pressure with temperature (temperature at vapor outlet port place with this moment the discarded hot air temperature when the radiating tube import enters identical), the high-temperature gas of acquisition arbitrarily uses.(2) with gas thermal medium: will discard hot gas and feed from radiating tube upper end import, cold air is sent into from the lower end of duct import, regulate gas pressure regulator, decide air pressure so that exit, pipeline upper end effluent air temperature is identical with the discarded hot air temperature that enters at this moment radiating tube import department, can be overheated, cold airflow conducting heat-shift in the flow process in opposite directions, obtain and synthermal homogeneity of discarded hot phase or heterogeneous hot gas when entering the radiating tube import recycle.Homogeneity thermal medium gas is adjustable to make its same air pressure, same flow velocity, same flow, so that the hot gas of acquisition and discarded hot gas equivalent is easy to use.

Claims (1)

1. Heat energy exchanging and recovering technology with two face-to-face flows, device is some equidistantly in the big pipe of the length that meets the demands that is incubated, Deng bore, with the strong little pipe of the isometric conductivity of heat of big pipe as hot channel, the circle gross area equated with residue cross-sectional area in the big pipe of insulation in the whole little pipes of hot channel were transversal, it is characterized in that: be incubated big round pipe and erect (or coiled spiral becomes cylinder to erect), make contain hot liquid (or containing hot gas) in hot channel by top to the bottom, cold liquid (or cold air) in utilidor from the bottom to top with same uniform flow (annotate: the non-homogeneous thermal medium not necessarily requires), equal flow (annotate: the non-homogeneous thermal medium not necessarily requires) flows in opposite directions, utilize the conduction of the step temperature difference that exists in the flow process in opposite directions, thereby make heat energy conduct exchange step by step, finally reach maximum thermal energy exchange, the effect that reclaims.