CN100498134C - Thermal-energy stepwise multi-use solution concentration-regeneration device - Google Patents

Abstract

The invention discloses a solution concentration regeneration equipment for heat energy reuse in step, comprising steam kettle, heat exchanging system, peripheral pipe system and electric control system. The steam kettle comprises part in high-temperature zone, part in middle zone and part in condensing zone. Said part in the middle zone comprises outer wall, inlet port for dilute solution, outlet port for concentrated solution, installing port for inductor, solvent outlet port, vent and dissepiment between cavities. Said dissepiment between cavities comprises heat exchanging rib in evaporating room, middle plate of dissepiment between cavities and heat exchanging rib of condensing room. The invention can be widely applied in chemical condensing process, generator of air-conditioner with lithium bromide and so on. It can save energy and water resource greatly. It can decrease operation cost and compress equipment space. It is provided with huge environmental benefit and economical effect.

Description

Thermal-energy stepwise multi-use solution concentrating-regeneration device

Technical field

The present invention relates to fields such as solution concentration and regeneration, chemical industry extraction and desalinization, especially, relate to a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device.

Background technology

Multi-effect evaporator in alternative lithium bromide generator of air-conditioner of the present invention and the medical production industry.Existing double-effect lithium bromide absorption chiller has high pressure and two generators of low pressure, and the lithium bromide absorbent solution of dilution arrives first high pressure generator, is passed through the Steam Heating of higher temperature in the high pressure generator coil pipe; The refrigerant vapour that produces in high pressure generator heats the intermediate solution of low pressure generator, thereby the heat energy of steam is utilized twice as the thermal source of low pressure generator.Multi-effect evaporator in medical production industry adopts three evaporators to connect with pipe, and the method that adopts steam latent heat to utilize realizes purpose of energy saving.All because of heat exchange principle that adopts tubular type and the way that steam pumping is kept draught head, it is very big to be directed at temperature difference loss for they, and because of reducing fast along with the effect number increases energy-saving efficiency, finally causes increasing effectively and utilize number of times.In addition, they are because each effect (utilizing once) all has one independently to irritate son, so the volume of whole system is all bigger, the pipe-line system complexity is unfavorable for conserve space, also is unfavorable for modularization production, the present industrial development trend of incompatibility.

Summary of the invention

The objective of the invention is at the deficiencies in the prior art, a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device is provided.

The objective of the invention is to be achieved through the following technical solutions: a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device, it is by steaming still, and heat-exchange system, peripheral conduits system and electronic control system are formed; Wherein, steaming still mainly is made up of high-temperature region element and mesozone element; Separate connection by interventricular septum plate, connection pad circle between the high-temperature region element of described steaming still, mesozone element and the condensing zone element, the steam via hole is opened on interventricular septum plate top; Described mesozone element is composed in series by mesozone cell one by one, also separates by interventricular septum plate, connection pad circle between the cell of described mesozone to connect; Wherein, the mesozone cell that links to each other with the condensing zone element is made up of inductor installing port, solvent outlet, cooling water inlet, coolant outlet and chamber spaced walls; All the other mesozone cells are made of outer wall, weak solution inlet, concentrated solution outlet, inductor installing port, solvent outlet, exhaust outlet and chamber spaced walls; Described chamber spaced walls is made up of the heat exchanging rib of plate, vaporization chamber in the spaced walls of chamber and the heat exchanging rib of condensation chamber; Weak solution inlet and concentrated solution outlet are in vaporization chamber one side, and inductor installing port and solvent outlet are in condensation chamber one side; The high-temperature region element has weak solution inlet and concentrated solution outlet, the concentrated solution outlet of high-temperature region element connects the weak solution inlet of coupled mesozone cell, and the concentrated solution outlet of upper level mesozone cell connects the weak solution inlet of next stage mesozone element.

Further, in the element of described high-temperature region the direct combustion parts are set, electroheat member or heat-exchanging part; Radiator is set in the described condensing zone element or communicates with outdoor radiator.Described heat-exchange system is made up of weak solution outlet, colvent inlet, concentrated solution inlet, concentrated solution outlet, weak solution inlet, heat-insulation layer, interchanger shell, heat-exchange tube, solvent outlet.Described control system mainly is made up of the mechanical, electrical sub-valve of drawing liquid, data acquisition and analytical system.

The invention has the beneficial effects as follows that the present invention efficiently solves in the prior art such as multi-effect evaporator, along with imitating that number increases and the problem that energy-saving efficiency reduces fast; Also have because of main mesozone element adopts the blade type modularized design, effectively compress the entire equipment space, effectively reduce heat-energy losses; And help maintenance, help modularization production, reduce production mould quantity, reduce production costs.

The annex explanation

Fig. 1 is a series connection feed connection method system architecture sketch;

Fig. 2 is a steaming still horizontal sectional view of the present invention;

Fig. 3 is a mesozone cell horizontal sectional view;

Fig. 4 is a mesozone cell A-A cutaway view shown in Figure 3;

Fig. 5 is a mesozone cell B-B sectional view shown in Figure 3;

Fig. 6 is an interventricular septum plate structural map;

Fig. 7 connects the packing ring schematic diagram between the foundry goods unit;

Fig. 8 steams still main part assembling schematic diagram;

Fig. 9 is the heat converter structure schematic diagram;

Figure 10 feed connection method in parallel system architecture sketch;

Among the figure, high-temperature region 1, mesozone 2, low-temperature space 3, vaporization chamber 4, condensation chamber 5, cooling chamber 6, chamber spaced walls 7, interventricular septum plate 8, steam still outer wall 9, electronic valve 10, heat exchanger 11, concentrated solution pipeline 12, solvent pipe 13, weak solution pipeline 14, splashproof net 15, heat-insulation layer 21, firing equipment 22, cooling chamber 23, weak solution inlet 24, concentrated solution outlet 25, inductor installing port 26, solvent outlet 27, connecting pipe system 28, cooling water inlet 29, coolant outlet 30, plate 31 in the spaced walls of chamber, the heat exchanging rib 32 of vaporization chamber, the heat exchanging rib 33 of condensation chamber, exhaust outlet 51, steam via hole 61, screw 62, connection pad circle 71, high-temperature region element 81, mesozone element 82, condensing zone element 83, weak solution outlet 91, colvent inlet 92, concentrated solution inlet 93, concentrated solution outlet 94, weak solution inlet 95, heat-insulation layer 96, interchanger shell 97, heat-exchange tube 98, solvent outlet 99.

The specific embodiment

Describe the present invention in detail with instantiation with reference to the accompanying drawings below, purpose of the present invention and effect will be more obvious.

Device of the present invention is by steaming still, and heat-exchange system, peripheral conduits system and electronic control system are formed, and can be divided into two kinds of series connection feed connection method system shown in Figure 1 and shown in Figure 10 feed connection method in parallel systems by feeder sleeve method of attachment difference.Because the ancillary equipment and the pipe-line system of series connection feed connection method system are fairly simple, and have more typicalness, do following analysis explanation as the master earlier.

This device adopts the directly-heated exchanged form, and adopts heat transfer fin and surface-treated method, can reduce resistance of heat transfer well, thereby improve heat transfer efficiency.Adopt present technique also to reduce a lot of intermediate links such as steam pipe and steam pump, reduce the unavailable heat loss of energy widely.All adopt an effective measure in inner each heat transfer link, strictness limits the generation of non-target heat transfer type, and makes it to drop to two to three orders of magnitude (except that cavity unit interstitial fluid stream carries) of effective heat energy, to satisfy the realization of synergy target.Efficiently solve in the prior art such as multi-effect evaporator the problem of drift failure along with the increase of recycling number of times.Mainly take following technical measures:

Mainly reach and cut down the number of intermediate links, improve heat transfer efficiency, reduce the purpose of invalid loss by the structure optimization of steaming still.Whole steaming still structure is as series connection feed connection method system architecture sketch Fig. 1 and to steam the still horizontal sectional view shown in Figure 2, directly is in series by cavity unit one by one, and each cavity is divided into two and is separated by and local two locellus that communicate.Heat transfer type between two locellus is based on phase-change heat transfer, in order to reduce the heat-energy losses that other heat transfer type causes, interventricular septum plate 8 is a heat-barrier material, and be separated into the outer of steaming still outer wall 9 always, make heat energy have only the process of condensing of the flowing of evaporation by solvent, steam, steam could be smoothly the heat energy of vaporization chamber to be passed to the heat exchanging rib 33 of plate 31 and condensation chamber in the chamber spaced walls in the condensation chamber.The cavity unit close proximity is directly conducted heat with conduction pattern each other one by one.In order to improve the heat transfer efficiency of chamber spaced walls, the chamber spaced walls is made the structure of band heat exchanging rib, and do on the surface and to draw " V " shape to handle, to increase heat exchange surface area, reduce the surface exchange thermal resistance in unit cross section.Dual mode is delivered in relays, till cooling chamber 6.Whole process is save steam pipe, and intermediate links such as steam pump have not only reduced heat-energy losses, also the efficient of the solvent extraction that improves widely.

Utilize outer insulation, technical measures such as adiabatic heat-insulation pipeline system and heat exchange are lost outward to prevent heat energy.Heat-insulation layer is done in the outside, and external tube adopts heat-insulating material or the composite pipe of isolation section is arranged, and prevents that heat energy scatters and disappears (except cooling chamber) outside system and conducts to adjacent cells.Influent (weak solution) is passed in the logical again heat exchanger classification of the heat energy that outflow liquid (solvent and concentrated solution) is taken away, and reduces the heat energy unnecessary loss.Thereby guarantee to make good use of the heat energy that each part enters native system.

To since in the technology ratio (the calling the heat energy loss coefficient in the following text) K1 of the invalid heat energy loss that carries of necessary liquid stream and effective heat energy analyze: mainly be meant solution from vaporization chamber 4 when next stage vaporization chamber 4 is carried, though there is not heat-energy losses, but this part heat energy is not participated in the evaporation process of this cavity unit, is a kind of loss concerning this technology yet.Suppose to have N cavity unit, total temperature difference is T, the heat of vaporization of solvent is q, the thermal capacitance of solution is C, enrichment factor is D, then the theoretical calculation expression formula of K1 be K1=((1-D/ (N-1))+(1-2*D/ (N-1))+... + (1-(N-1) * D/ (N-1))) * C*T/N/ (q*D)=(N-1-N*D/2) * C*T/N/ (q*D).

Wherein, adopted Liquid extracting to replace gas to extract, the effect of the pressure differential maintain energy consumption of reduction is as follows.Temperature difference between each cavity unit is kept by corresponding steam pressure difference, and steam pressure difference is finished by each associated electrical valve control fluid flow, rather than adopted the method for steam pumping then by the data message of central stamen sheet according to collection.Can make the power power consumption of keeping reduce to the one thousandth of traditional method, only account for ten thousand of main body heat transfer power/in.With every regeneration unit 1kg water, average pressure reduction is that 0.5 atmospheric pressure is that example is calculated, and the ratio that control power consumption and heat of solution are less than the solvent heat of vaporization greatly is 1.01*10 ⁵* 0.001*0.5/ (1*1000*2253)=2.24*10 ^-5

Other heat energy loss COEFFICIENT K 2 is analyzed: utilize outer insulation, the heat energy of going back objective reality after the technology such as heat-insulated pipe and heat exchange loses (except that K1) outward.Because after having taked above-mentioned effective technology measure, can be controlled at through measuring and calculating total losses heat energy within one of the percentage of main body heat transfer power.

With salt solution, not having the heat of solution solute is example, and it is as follows that overall operation efficiency of the present invention is done theory analysis:

Suppose to have N bin, the thermal-conduction resistance of chamber spaced walls 7 is R, chamber spaced walls 7 is respectively RA, RW with the exchange thermal resistance of steam, liquid solvent, total temperature difference is T, the heat of vaporization of solvent is q, the reference area (steaming the area of section of still) that participates in the chamber spaced walls of heat exchange is S, then each second maximum producible solvent quality expression formula be:

M＝(1-K1)(1-k2)*N*△T*λ/q

＝(1-K1)(1-k2)*N*(T/N)*[S/(RA+R+RW)]/q

＝(1-K1)(1-k2)*T*S/(RA+R+RW)/q (1)

And when the production same solvent, the per second heat energy demand by each unit is:

Q＝(1-K1)(1-k2)*q*M/N

＝(1-K1)(1-k2)*(T/N)*S/(RA+R+RW)

＝(1-K1)(1-k2)*[T*S/(RA+R+RW)]/N (2)

By learning in the formula (1) that solvent quality and the series unit base that produce each second are originally irrelevant, and can be S by the reference area that increases the chamber spaced walls that participates in heat exchange, or the total resistance of heat transfer that reduces chamber spaced walls 7 improves (comprising that spaced walls 7 thermal-conduction resistances in chamber are R, exchange thermal resistance RA, the RW of chamber spaced walls 7 and steam, liquid solvent) extraction efficiency of solvent.After that is to say the application present technique, no matter what bins of series connection, as long as the reference area of system's total temperature difference and chamber spaced walls and entire thermal resistance equate that then the solvent quality of generation each second is equal substantially, that is to say the production efficiency that does not influence generator substantially.

By learning in the formula (2), after present technique, what unit that don't work, under the identical situation of the solvent quality of generation each second, the heat energy that whole system needs approximately is about the 1/N of a unit.

The example measuring and calculating

Get 1% in the k1 value, the design conditions of k2 are T=80, and D=0.7, solvent are example with water, do contrast with the multi-effect evaporator efficient in perfect condition, the chemical industry.Through theory measuring and calculating, required heating steam relative quantity contrast is as following table during every generation unit steam:

N	1	2	3	5	10	50
							Ideal value	1.0000	0.5000	0.3333	0.2000	0.1000	0.020
Present technique	1.0101	0.5217	0.3611	0.2235	0.1144	0.0233
							With the ideal value ratio	1.0101	1.0434	1.0834	1.1175	1.144	1.165
Multi-effect evaporator	1.100	0.57	0.4	0.27	——	——
							With the ideal value ratio	1.1	1.14	1.20	1.35	——	——
With the present technique ratio	1.0890	1.0926	1.1077	1.2080	——	——

As can be seen from the above table, after adopting present technique, required heat energy is along with the increase of recycling number of times when producing unit steam, be tending towards 1.17 with the ratio of ideal value, from follow prior aries such as originally having solved multi-effect evaporator, show off F (N)=0.0075*N with the ratio of ideal value along with the increase of recycling number of times ²The problem that+0.0175*N+1.075 gradually lost efficacy.

This installs main mesozone element and adopts blade type, modularization, standardized designs (is intermediary element unit B-B sectional view Fig. 5 as Fig. 5), helps compressing the entire equipment space; Help reducing the approach of heat-energy losses, improve efficiency of utilization; Help adjusting on demand effect number N; Help modularization production, reduce production mould quantity, reducing increases the cost of imitating number N; Also help maintain and replace mesozone element and related accessory when using.

The loss that the device of invention adopts feed connection method in parallel can also reasonable elimination heat energy loss COEFFICIENT K 1 to cause can improve about 10% efficient than series process through calculating.But adopt feed connection method in parallel specially to join a heat exchanger for each cavity unit, and the increase that brings manufacturing cost, and system becomes more complicated.

In sum, adopt present technique, not only can solve in the prior art problem of drift failure effectively along with the increase of recycling number of times; Can effectively reduce increases the cost of imitating number, can also reduce the space of equipment, improves the maintainability in the use.

Describe the composition of thermal-energy stepwise multi-use solution concentrating-regeneration device of the present invention below in detail.

Device of the present invention mainly by steaming still, form by heat-exchange system, peripheral conduits system and electronic control system, can be divided into series connection feed connection method system shown in Figure 1 and shown in Figure 10 feed connection method in parallel system by feeder sleeve method of attachment difference.

Steam still basic structure as connecting feed connection method system architecture sketch Fig. 1 and steaming still horizontal sectional view as shown in Figure 2, be divided into high-temperature region 1, mesozone 2 and low-temperature space 3, the basic cavity unit of high-temperature region 1 and mesozone 2 is divided into vaporization chamber 4 and condensation chamber 5 by interventricular septum plate 8, should try one's best in theory between two Room direct underground heat conduction does not take place, heat energy can only pass to condensation chamber 5 by the flowing of steam that vaporization chamber 4 produces, specifically shown in big arrow in the series connection feed connection method system architecture sketch 1.Should there be heat transfer property as well as possible in next door 7 between adjacent cavities, makes under identical heat flow rate per unit area (rate of setting), reduces the temperature difference between adjacent bin, to improve the number of times that utilizes of heat energy.And good heat-insulation layer should be arranged at whole combined system outer wall 9, to reduce the loss of heat energy,, and form necessary thermograde with the assurance utilization efficiency of heat energy.

According to the above-mentioned technological process and the requirement of casting technique, the divisional plane of each cast member is divided into whole steaming still as steaming still main part assembling schematic diagram high-temperature region element 81, mesozone element 82, condensing zone element 83 three major types shown in Figure 8 due to interventricular septum plate 8 places.High-temperature region element 81 is the heat affected zone, can increase direct combustion parts, electroheat member or heat-exchanging part at interior thorax according to actual needs.Condensing zone element 83 is the radiating area of native system, needs logical outdoor radiator, waste heat is dispersed into make native system can keep necessary thermograde outside the system.Mesozone element 82 sees mesozone cell horizontal sectional view Fig. 3 and explanation thereof for details for steaming the important main part of still.

The structure of mesozone cell such as mesozone cell horizontal sectional view Fig. 3, mesozone cell A-A cutaway view Fig. 4 and mesozone cell B-B cutaway view are shown in Figure 5.The mesozone cell is made of external thermal insulation, outer wall, chamber spaced walls 7, weak solution inlet 24, concentrated solution outlet 25, inductor installing port 26, solvent outlet 27 and exhaust outlet 51.The heat exchanging rib 33 of the heat exchanging rib 32 of plate 31, vaporization chamber, condensation chamber is collectively referred to as chamber spaced walls 7 in its lumen spaced walls.In order to reduce each chamber spaced walls 7 entire thermal resistance, the structure that increases surface area is as wide as possible all made in plate 31 both sides in the spaced walls of chamber, the design of the heat exchanging rib 32 of vaporization chamber as shown in this figure and the heat exchanging rib 33 of condensation chamber, the heat exchanging rib surface can also pull into the little groove of " V " font, can make surface area enlarge 10～20 times, thereby reduce the exchange thermal resistance.In the rising of considering the evaporating area steam bubble, what heat exchanging rib 32 spacings of vaporization chamber should be suitable is wideer, guarantees that steam bubble rises smoothly.As long as it is the heat exchanging rib of condensation chamber 33 then satisfies under the requirement of production technology, close more good more.And be fit to do into N1*L1/RA=N2*L2/RW (N1, N2 are respectively the floor number of both sides),, make the entire thermal resistance minimum to reach with the least possible space and material.Because the surface exchange thermal resistance is greater than in the spaced walls of chamber one of plate 31 thermal-conduction resistance more than the order of magnitude in the formation of chamber spaced walls 7 entire thermal resistances, be to reduce the effective way of thermal-conduction resistance so increase heat exchange surface area.

Shown in Figure 4 as mesozone cell A-A sectional view.The upper and lower side of the heat exchanging rib of the evaporating area mouth that should every interval a slice punches, to be communicated with cell between adjacent rib, the flow process of lengthening liquid stream forms concentration gradient preferably.

Shown in Figure 5 as mesozone cell B-B sectional view.The lower end of the heat exchanging rib of the condensing zone mouth that should punch, as shown in Figure 5, to be communicated with each intercostal cell, so that solvent compiles.And set up defences in interventricular septum plate steam via hole 61 lower edges of heat exchanging rib 32 upper ends of vaporization chamber and to spatter net 15, droplet is splashed into condensation chamber when stoping the solution boiling, influence the purity of regenerated solvent.Exhaust outlet 51 mainly is to use when resetting, arranging when not moving for a long time or overhauling into air.

Shown in Figure 6 as interventricular septum plate structural map.The interventricular septum plate should adopt thermal insulation and have preferably resistant material make, and plays the effect of separating vaporization chamber 4 and condensation chamber 5, and steam via hole 61 is opened on top.

As connecting between the foundry goods unit shown in the packing ring schematic diagram 7, connect packing ring 71 and should adopt encapsulant such as resistant to elevated temperatures silicon rubber to make, play the connection sealing function of each element.

Steam the assembling of still main part as steam still main part assembling schematic diagram shown in Figure 8.Adopt the flange of bolt to connect between interventricular septum plate 8, connection pad circle 71, high-temperature region element 81, mesozone element 82 and the condensing zone element 83, the mouth of pipe that steams on the still main part connects with adopting screw socket loose joint method being connected of pipe-line system, the inductor installing port 26 that steams on the still main part adopts screw socket to be connected with sensor module, seals with bolt on the exhaust outlet 51.

Heat converter structure such as heat converter structure schematic diagram are shown in Figure 9.Weak solution outlet 91, colvent inlet 92, concentrated solution inlet 93, concentrated solution outlet 94, weak solution inlet 95, heat-insulation layer 96, interchanger shell 97, heat-exchange tube 98, solvent outlet 99.Weak solution enters from weak solution inlet 95, by heat-exchange tube, flows out from weak solution outlet 91, always in heat-exchange tube.The solvent of different temperatures is the 92 left chambeies that enter heat exchanger from the colvent inlet respectively, through flowing out from solvent outlet 99 after the heat exchange.Concentrated solution enters the right chamber of heat exchanger from concentrated solution inlet 93, through flowing out from concentrated solution outlet 94 after the heat exchange.Temperature in the whole heat exchanger is that a left side is high right low, and various solution separately adopt the mode of counter-current fractionation exchange that the waste heat of solvent and concentrated solution is exchanged to weak solution, make heat energy be able to the recycling of fullest.

Connection describes to the peripheral conduits system: heat exchanger weak solution outlet 91 and steaming still weak solution inlet 24, the outlet 27 of each solvent of steaming still and the colvent inlet 91 of heat exchanger, the concentrated solution outlet 25 of steaming still all is connected with electronic valve with the outer heat insulation pipe that is incubated with the inlet 93 of the concentrated solution of heat exchanger.

Control system mainly is made up of the mechanical, electrical sub-valve 10 of drawing liquid, data acquisition and analytical system.Native system is gathered data such as pressure in each unit, temperature, solution concentration, liquid level, deliver to data and handle the analysis of stamen sheet, again dependent instruction is sent to drawing liquid machine and electronic valve,, can under normal each parameter, move thereby guarantee to steam still so that flow is adjusted.

The method of attachment such as the feed connection method system architecture sketch in parallel of feed connection method in parallel are shown in Figure 10.In order to reduce the said K2 loss in front,, can adopt this method of attachment in the equipment of effect number more (greater than 5) large-scale.It is identical with series connection feed connection method with control appliance that its main equipment steams still, and just the structure of the turnover method of solution and heat exchanger is different.The turnover method of solution enters for weak solution in each cavity unit, and concentrated solution directly goes out to steam still, no longer enters next unit and further concentrates, and each unit is not always the case.Heat exchanger then can adopt common single chamber heat exchanger.

Manufactured materials all should be selected for use by the chemical property of solution again when producing.Satisfying under the prerequisite of the related request among the present invention in every control parameter, selected according to the physicochemical properties of solution.

Describe operation of the present invention below in detail: when just starting work, open exhaust outlet 51, be full of with solution in the cavity earlier, and close exhaust outlet 51 after being heated to predetermined temperature, again by the electronic valve and the drawing liquid machine of each gateway of control, control the liquid level of each chamber well, form certain vapour pressure gradient, thereby form the thermograde that equates, make heat energy successfully flow to low-temperature space, form stable hot-fluid from the high-temperature region.

After forming the thermograde of design, evaporating area solution receives the extraneous heat energy that transmits in the high-temperature region, make solvent flash to steam, flow to condensing zone by crossing steam vent 63, cooling through the low one-level chamber of temperature spaced walls 7, change liquid state into, simultaneously heat energy is passed to solution in next (lower temperature) chamber that need heat, and the solvent of condensation converges in the bottom after electronic valve flows to heat exchanger, solution through concentrating also flows to next stage through electronic valve and further concentrates, and has finished a whole process that cavity is interior like this.

In like manner, along with the evaporation and the carrying out of condensation process in each bin, heat energy also by the high-temperature region to the low-temperature space transmission, solution also obtains concentrated length by length, up to temperature (low temperature bin) low cannot utilize again till.And condensing solvent that comes out in each bin and the concentrate that comes out are at last passed to the weak solution that flows to the high-temperature region to waste heat by heat exchanger 11 again, not only make heat energy obtain filling a part utilization, also can reduce the temperature of controlling oneself.In the process of normal operation,, just can keep steam pressure difference and thermograde necessary in each cavity as long as control the flow of liquid well by electronic valve 10, and power consumption that only need be seldom in the whole control process.

Then can be when quitting work by opening the electronic valve of weak solution inlet, allow solution flow to low-temperature space, be full of chamber, make the solution of higher concentration then be pooled to low temperature bin, so not only can improve restarting speed, can also reduce the inside and outside differential pressure of bin, thereby prevent that air from entering, reduce the fatigue strength of equipment.When starting then can be directly used in next flow process to the dense chamber of coagulating, and other dense liquid that coagulates in chamber is got back in the weak solution storage tank.If the short time stops transport, the vapour pressure that also can keep steaming in the still is an atmospheric pressure, and liquid level can be constant.

The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.

Claims (4)

1, a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device is characterized in that, it is by steaming still, and heat-exchange system, peripheral conduits system and electronic control system are formed; Wherein, steaming still mainly is made up of high-temperature region element (81), mesozone element (82) and condensing zone element (83); Separate connection by interventricular septum plate (8), connection pad circle (71) between the high-temperature region element (81) of described steaming still and the mesozone element (82); Described mesozone element (82) is composed in series by mesozone cell one by one, also separates by interventricular septum plate (8), connection pad circle (71) between the cell of described mesozone to connect, and steam via hole (61) is opened on interventricular septum plate (8) top; Wherein, the mesozone cell that links to each other with condensing zone element (83) is made up of inductor installing port (26), solvent outlet (27), cooling water inlet (29), coolant outlet (30) and chamber spaced walls (7); All the other mesozone cells are made of outer wall, weak solution inlet (24), concentrated solution outlet (25), inductor installing port (26), solvent outlet (27), exhaust outlet (51) and chamber spaced walls (7); Described chamber spaced walls (7) is made up of the heat exchanging rib (32) of plate (31), vaporization chamber in the spaced walls of chamber and the heat exchanging rib (33) of condensation chamber; Weak solution inlet (24) and concentrated solution outlet (25) are in vaporization chamber one side, and inductor installing port (26) and solvent outlet (27) are in condensation chamber one side; Described high-temperature region element (81) has weak solution inlet and concentrated solution outlet, the concentrated solution outlet of high-temperature region element connects the weak solution inlet of coupled mesozone cell, and the concentrated solution outlet of upper level mesozone cell connects the weak solution inlet of next stage mesozone cell.

2, a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device according to claim 1 is characterized in that, in the described high-temperature region element (81) the direct combustion parts is set, electroheat member or heat-exchanging part; Radiator is set in the described condensing zone element (83) or communicates with outdoor radiator.

3, a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device according to claim 1, it is characterized in that described heat-exchange system is made up of weak solution outlet (91), colvent inlet (92), concentrated solution inlet (93), concentrated solution outlet (94), weak solution inlet (95), heat-insulation layer (96), interchanger shell (97), heat-exchange tube (98), solvent outlet (99).

4, a kind of thermal-energy stepwise multi-use solution concentrating-regeneration device according to claim 1 is characterized in that, described control system mainly is made up of the mechanical, electrical sub-valve of drawing liquid, data acquisition and analytical system.

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