CN101042259A

CN101042259A - Step heating method of heat pump and its uses thereof for heat recovery hot-water boiler

Info

Publication number: CN101042259A
Application number: CN 200610131911
Authority: CN
Inventors: 许志治
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-10
Filing date: 2006-10-10
Publication date: 2007-09-26
Anticipated expiration: 2026-10-10
Also published as: CN101042259B

Abstract

It relates to a new multi thermal pump progressive heating method. On the one hand, it improves heating speed, and avoids heat short loss in the process of heating, using heat pump progressive heating method. It can be used in many fields, with low running cost, and better energy generation ability even than that of the solar energy.

Description

The step heating method of heat pump and uses thereof for heat recovery hot-water boiler thereof

Affiliated field:

The invention provides a kind of more high efficiency heat pump heat collecting method, and the laddering recuperation of heat hot-water boiler of principle design thus, the hot-water boiler of this zero-emission is used in electronics industry, dyeing industry and outdoor bathing place, the bathroom that a large amount of thermal wastewaters discharge to be had than the better economic benefit of coal burning boiler.

Technical background:

Energy scarcity along with petrochemical industry, the pay attention to day by day of environmental requirement, air source, waste water source are gone up on the stage in succession, but on the method for heat pump, all continue to use two kinds of basic skills: 1, be that condenser copper tube is directly coiled in water tank always, this is in the majority in commercially available domestic hot water device, 2. be to be together in series with pump handle boiler and heat exchanger, constantly the water in the water tank is delivered to heat exchanger heating copper pipe place by water pump and accept heat, send water tank then back to, water is heated up, what disadvantage do these two kinds of methods have so?

At first being that heat transfer efficiency is not high, secondly is that heat pump is not worked under the best circumstances.

Summary of the invention

One, according to Fuli Ye Dinglv, the heat transmission is only relevant with two factors: a. heat transfer coefficient; B. the temperature difference.

A. for a example the most popular, heat the water of same amount with inhomogeneous container, we can see that Copper Pot is the fastest, secondly be aluminium, iron, the poorest be pottery.Trace it to its cause, be originally that the heat transfer of copper is the fastest, pottery then takes firewood because of the slow let us that conducts heat more, and Here it is is subjected to the restriction of heat transfer coefficient.Equally, in water tank, the hot water around the copper pipe has become the heat transfer barrier between thermal source (copper pipe) and other cold water that need heat with the condenser copper tube dish, and making firing rate can only be the upper limit with the heat transfer rate of water, can't improve again.

B. constantly the water in the water tank is delivered to the heat pump heat exchanger with water pump and remove to accept heat there, more quite a lot of than above-mentioned condenser pipe inlet water tank heating, because it is many that water is stirred back thermal boundary subduction, but the disadvantage of this whole box water heating is that the water that has heated has been sent back to raw water box, with not heating mixing mutually, the heating copper pipe and the temperature difference that is heated water are diminished,, be unfavorable for improving heat transfer rate according to Fuli Ye Dinglv.

If we heat by a plurality of heat pump relays, heated water does not heat with not retracing one's steps in succession, up to preset temperature (as the 45-50 degree) and inlet water tank is preserved, this goes back to reduce not add the temperature difference between hot water and the heating copper pipe with regard to no longer including the water that has heated, the boiler constantly hot water of accumulation is exactly " trouble-maker " that others accepts heat that originally will go back to influence who is held in captivity, the laddering heating of this heat pump, the machine of both can having accomplished is opened the convenient of hot water, can raise the efficiency again, really kill two birds with one stone, this measure cost does not increase yet, because the heat pump of just original many parallel connections makes many series connection into.

Two, how to allow heat pump two problem: a. that worked in the best condition reduce  loss as far as possible; B. low temperature low heat, the high thermal source of high temperature.

A. reduce the  loss is a ubiquitous problem as far as possible, and heat pump is no exception.In theory, heat a certain amount of water, make its temperature some degree that raise, its calorific requirement is a certain value.But along with the progress of science, people recognize that above-mentioned conclusion only is the conclusion of first law, and are not comprehensive.Heat can be gone up in " amount " and equate that but go up difference in " matter ", this " matter " is exactly the  value.Electricity consumption, coal, diesel oil add hot water, why be waste because electric and fossil energy all be high-grade energy (

Value is zero) past we obtain conclusion with " can analyze ", the energy loss of maximum is condenser (47%) in the steam-electric generating station, usefulness "  analysis " learns that the  in the condenser only loses 1.5%. to

The channel of degenerating mainly conducts (49%) in the heat of the burning of boiler itself and cigarette, steam unexpectedly.Water for bathing only needs about 45 degree in the daily life, is exactly a waste with spending to 45 after water that is heated to 90 degree and the cold water mix so, and it is " hot short circuit " for the title of our image.This cans be compared to the power supply that electrical potential difference is arranged with its short circuit, although can surrender energy with heating, does very like this and is unworthy, because it makes

Be that to have become  be zero environment heat for zero electric energy.Perhaps the someone can say hot water with 90 degree add cold water do manual labour water, with steam " burning " hot water; it is frequent thing; all wrong? really; the notion of  was suggested more than 100 year; but when being admitted, being established to be eighties of last century the seventies oil crisis; this can only illustrate that the mankind accept the slow-witted and slow of truth, and irrelevant with truth itself.In Ancient Chinese generation,, the famous field story of avoiding horse racing was exactly to allow the other side horse that runs the most soon and the horse that we are the slowest compete, and this is actually " the  value " of having wasted the other side and wins victory.

" identical heat but has different  values, and the  value that temperature is high is high ".Given this conclusion, we just propose and can not produce domestic water towards cold water with high-temperature water, but with needing many heat to practise strict economy with regard to the principles that are added to many heat.

B. the heat pump let us has had the possibility of utilizing wasted energy.But in the process of utilizing, still have a problem that what use is made of is most effective.

Because the work of heat pump has its particularity, be designed to once only improve about 5 ℃, and the copper pipe heating is unlike the thermal source of chemical reaction, it is to be supported by the work of compressor, water is untimely takes away heat if be heated, refrigerant pressure in condenser pipe increases compressor suddenly just the possibility of burning, therefore for the water that is heated of accepting heat, temperature is low, perhaps heat exchange area more greatly, water velocity hurry up, compressor operating just easily, life-span is long, power saving, and these some require in the method for incremental polyphone heating, can accomplish, suppose running water after the preheating of superheater tube case, rise to 20 ℃ then it 25,30,35,40,45 ground are gone up, and have only the load temperature of last compressor high, but the wastewater temperature of supply heat is also at highest point, and the compressor two ends temperature difference is littler than former method.Compressor can longevity, power saving, stably work.Waste water is reverse and go, it is that 20-15,15-10,10-5 fall progressively like this, and it is 5-10 ℃ waste water that the evaporimeter of afterbody touches, and to require be 20-25 ℃ and heat up, compressor operating pressure is equally very low, each compressor can operating efficiency in optimum state.

Description of drawings:

Fig. 1 is the utilization example of this patent method:

The 1st, spent hot water's import 2 is that scrubbing settling tank 3 is dirt pockets

4 waste water tanks, 5 second screen packs, 6 water-level probes, 7 expansion valves, 8 water pumps

9 evaporimeters, 10 shell and tube exchangers, 11 temperature probes, 12 wastewater outlets

13 waste water tank dividing plates, 14 heat pipes, 15 filtered water tanks, 16 water flow switches

17 feed cocks, 18 expansion valves, 19 compressors, 20 capillaries, 21 condensers

22 shell and tube exchangers, 23,24,25 strings and hand-operated valve 26 temperature probes 27 quicken water pump 28 boilers

Embodiment:

1. the heat exchanger that so-called heat pump series connection is exactly interior dress condenser is together in series, and the outlet of first heat pump heat exchanger 22.1 connects boiler ... the import of first heat exchanger connects the outlet of second heat pump, and the heat exchanger of last heat pump connects heat exchange of heat pipe; The heat exchanger of interior dress evaporimeter also is together in series by mentioned above principle, difference is that into water moves towards, just in time opposite, the spent hot water connects first heat pump 10.1 earlier, after connecting successively in the end a heat pump place connect sewer, behind reverse heat-obtaining, waste water has had only 2 ℃-7 ℃ to sewer at last, does not have least bit heat waster again.

2. some small-power heat pump series connection, make the amount of the suitable institute of the power sum heat production water of little heat pump.Principal character is to heat the heat pump that does not return the low one-level of temperature step by step to go with being heated water one-level one-level there, and rises to last heat pump, just in time is preset temperature, just advances boiler and preserves.Because every heat pump only rises 5 ℃, therefore default temperature difference number need only be removed 5 promptly is the required platform number of heat pump series connection heating.

Many heat pumps of this patent can go here and there, can be also, string and adapt to power adjusting in combination, follow the trail of changes of seasons.Even the also harmless overall situation of a wherein a certain maintenance, complete machine is work as usual.In addition, because of heat pump is in the position that has nothing in common with each other, fine-tuning each point finds best operating point.Advance scrubbing case 2 with the waste water of crossing from 1 and filter, therefore precipitation is arranged because the scrubbing case is deeper than waste water tank 4 again owing to the scrubbing case has dirt pocket 3, if the waste water in bathroom, but that dirt pocket washing every day.The spent hot water is promptly sent heat the running water of last layer behind the waste water tank by heat pipe.Waste water tank water completely has 6 perception and starts water pump 7 and start the heat pump spent hot water successively from 10.2 during to sewer 12 near about 5 ℃, and temperature controller has monitored the leaving water temperature height, and water pump slows down or expansion valve is regulated, and on the contrary, temperature is crossed and lowly then oppositely regulated.

Claims

1, a kind of new method of heating up water with heat pump, it is characterized in that some heat pump similar heat exchangers, be together in series end to endly, carry out laddering, relay heating, each heat pump is specialized in the rising of one section temperature like this, directly the income boiler is preserved after being heated water to be raised to preset temperature, no longer goes back to confuse with the water that is heated of lower temperature.

2. weigh 1 described method, it is characterized in that each heat pump certain uniform temperature that only be responsible for to raise, therefore the heat exchange amount of each heat exchanger that is together in series, specifically refrigerant capacity, heat exchange area and the exothermic temperature of condenser (except that last can be 90 ℃) other each all can suitably reduce up to each index till optimum state.

3. by weighing 1 hot-water boiler made from power 2 said methods, be equipped with condenser heat exchanger series connection after tail be to be heated the water inlet place, head connects deposits boiler, the head that the heat exchanger series connection of evaporimeter is housed is the used heat water tank, tail connects sewer, and the flow direction of two strands of water is just in time opposite.Temperature controller, water gauge, water flow switch are for accepting and believing element, and expansion valve, magnetic valve, water pump are executive component, and the magnetic valve (23) (24) (25) of regulating power output also can adopt hand-operated valve to align its string and structure, with suitable weather because of become season certainly.

4. by power 1,2,3 described hot-water boilers, its heat pump quantity can be removed every heat pump temperature rise and got by the general requirements of temperature rise.

5. by power 1,2,3,4 described hot-water boilers, the filtration of its waste water, precipitation are handled by the scrubbing settling tank, and its ratio wastewater case is darker, and have can be for the dirt pocket of washing.