CN202254929U - Pipeless heat exchanger - Google Patents
Pipeless heat exchanger Download PDFInfo
- Publication number
- CN202254929U CN202254929U CN2011202614052U CN201120261405U CN202254929U CN 202254929 U CN202254929 U CN 202254929U CN 2011202614052 U CN2011202614052 U CN 2011202614052U CN 201120261405 U CN201120261405 U CN 201120261405U CN 202254929 U CN202254929 U CN 202254929U
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- Prior art keywords
- particle
- heat exchange
- heat
- curtain
- heat pipe
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- Expired - Lifetime
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- 239000002245 particle Substances 0.000 claims abstract description 154
- 239000007787 solid Substances 0.000 claims abstract description 11
- 230000008676 import Effects 0.000 claims description 17
- 239000004744 fabric Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 50
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000002918 waste heat Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 241000276425 Xiphophorus maculatus Species 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a pipeless heat exchanger, which is formed by connecting at least one particle curtain heat exchanging unit. The particle curtain heat exchanging unit is provided with a horizontal straight-pipe-shaped gas channel. The gas channel is provided with a particle inlet and a particle outlet. Particles as heat exchanging media are fed from the particle inlet to the particle outlet to form a particle curtain. The particles are inert solid particles. The pipeless heat exchanger provided by the utility model has high heat exchanging efficiency, low equipment consumption, low operation and maintenance cost, good sealing performance and low energy consumption, and is suitable for various industrial equipment and reactors with higher exhaust temperature and waste heat value in use.
Description
Technical field
The utility model relates to a kind of heat exchanger, and technical field, is specially adapted to have higher exhaust gas temperature and the various industrial equipments of UTILIZATION OF VESIDUAL HEAT IN value and the high efficient heat exchanging and the heat recovery of reactor.
Technical background
There are the surprising various Industrial Boilers of number, station boiler, metallurgical furnace and various heating stove in China, and the primary energy that these boiler and stoves consumed accounts for three/the last two of China's fossil fuel.Because the reason of the fuel characteristic, operating condition and the equipment deficiency that use in the design defect of these boilers and stove and running aspects such as (descending) like heat transfer efficiency; Make the delivery temperature of most of boilers and stove be higher than design load (40～150 ℃), thereby caused great energy waste.
Existing Industrial Boiler, station boiler and industrial heating furnace adopt mostly based on the shell-and-tube of metal or glass material or regenerative air preheater and reclaim the air that its using waste heat from tail gas is used with preheated burning, and then improve catching fire and burning of fuel.Owing to receive the restriction of air preheater structure and heat-transfer mechanism aspect; Shell that these are traditional and heat accumulating type do not have heat exchange of heat pipe and exist following problem also not to be resolved for a long time all the time: (1) heat exchange efficiency is not high; The metal of no heat exchange of heat pipe or glass consumption are huge; Equipment is heavy, and manufacturing, operation and maintenance cost are high; (2) inleakage big (8%～30%) makes and send the air-introduced machine power consumption to increase more than 15～30%, and has a strong impact on unit operation and exert oneself; (3) very easily cause fouling of heating surface, obstruction, cold end corrosion, increase flowing resistance (up to 2500Pa) greatly, thereby increase the operation expense that send air-introduced machine power consumption and equipment greatly; (4) be difficult to further improve the temperature (mostly about 400 ℃) of preheated air, thereby be difficult to reach various low-quality solid fuel stability and high efficiencies burnings and low-quality gas, the aphlogistic high temperature requirement of liquid fuel; (5) when boiler or stove existed design and equipment deficiency, fuel quality and operating mode to change, the preheater of existing structure did not have real-time regulating measure etc.
The utility model content
The purpose of the utility model is to provide a kind of heat exchange efficiency high, and the equipment consumptive material is low, operation and maintenance cost is low, good airproof performance, no heat exchange of heat pipe that energy consumption is low.
This no heat exchange of heat pipe that the utility model provides is linked to be by a particle curtain heat exchange unit at least; Said particle curtain heat exchange unit has the tubular gas passage of straight horizontal; This gas passage is provided with a particle import and a particle outlet; Particle forms the particle curtain as heat transferring medium from the particle import to particle outlet, said particle is an inert solid particle.
Said inert solid particle adopts the mixing of a kind of in silica sand and the aluminium oxide or two kinds, and particle diameter is below 250 microns.
In order to make no heat exchange of heat pipe that the multi-stage heat exchanger effect arranged; No heat exchange of heat pipe is vertically arranged series connection up and down by bend pipe with the particle curtain that plural at least particle curtain heat exchange unit is linked to be snakelike and each particle curtain heat exchange unit, and perhaps this no heat exchange of heat pipe is linked to be the tubular and particle curtain each particle curtain heat exchange unit of straight horizontal by straight tube with plural at least particle curtain heat exchange unit and vertically arranges.
In order to regulate grain flux and to make uniform particles get into the particle import, said particle import department is provided with grain flux regulating part, particle current-sharing part.
In order effectively to shorten the length of particle curtain, said particle import department is provided with the guide into the particle guiding.
In order to make between gas and the particle curtain heat exchange abundant; The gas passage front end of this no heat exchange of heat pipe is connected with gas current-sharing member; Gas gets into gas passage through this current-sharing member; Said gas current-sharing member comprises the big orifice plate of current-sharing bare cloth, current-sharing flute plate, the big orifice plate that gathers, and to form the current-sharing of 3-5 level, said flute plate is arranged side by side by many straight tubes and formed.
The utility model do not have heat exchange of heat pipe with the particle curtain as heat transferring medium; This heat exchange mode can make gas and particle reach thermal balance fast; Thereby significantly improve heat exchange efficiency; The utility model does not have the residual neat recovering system of heat exchange of heat pipe formation and traditional shell-and-tube heat exchanger technology and apparatus in comparison; Do not have the shell-and-tube heating surface in the conventional tube shell heat exchanger, but utilize the fine particle and the direct contact heat-exchanging of air-flow of the very big and good fluidity of specific area, thereby this heat transfer technology is a kind of brand-new heat exchange and heat recovery technology.Compare with system with various industrial heat exchange that adopt in the present industrial circle and heat recovery technology device, this heat transfer technology based on particle curtain in the no heat exchange of heat pipe has very remarkable technical performance:
(1) air leakage coefficient of heat transmission equipment can be reduced to minimum, can reduce to 0 in theory, and the flow resistance of flue gas and air is very little, has only 1/5～1/3 of existing heat transmission equipment and system;
(2) heat exchange efficiency is than high more than 3～5 times based on traditional heat transmission equipment of shell-and-tube heat exchanger, thereby the volume of heat-exchanger rig and steel consumption amount will significantly reduce, and equipment manufacturing cost reduces greatly;
(3) ceiling temperature that can break through existing heat transmission equipment limits; Can the temperature of combustion air be heated to higher temperature levels (more than 800 ℃); Thereby the stable and efficient burning that can be various low-rank fuels creates very advantageous conditions, also will bring major transformation for the design of combustion apparatus such as boiler;
(4) can be coupled thermal current/cold particle, cold airflow/two heat transfer process of hot particle and heat transfer process is carried out continuously; Thereby can effectively overcome the many technological deficiencies in the heat accumulating type high-temperature preheater system, for the high-temperature air burning of the low-quality gaseous fuel of metallurgy industry or MILD burning provide the brand-new technology support;
The correlation technique parameter (particle gets into angle, grain flux, flowing velocity, particle curtain thickness and particle grain size etc.) of (5) participating in the particle of heat exchange can be controlled in running in real time; Thereby when the operating condition of equipment such as boiler and industrial furnace changes; Can realize through the relevant technologies parameter of regulating heat exchange particle curtain that this will bring major transformation for various boilers and stove Equipment Design and economical operation to the smoke discharging accuracy control over temperature;
(6) when materials such as heat exchange particle employing silica sands; Its wide material sources; Has good high temperature resistant, wear-resistant, corrosion-resistant and thermal shock resistance; Can effectively overcome the conventional tube shell-type does not have the problems such as cold end corrosion, wearing and tearing, tired broken ring and passage obstruction that exist in the heat exchange of heat pipe, and its equipment dependability and service life, operation and maintenance cost was far below existing heat transmission equipment far above existing heat transmission equipment.
It is important breakthrough theoretical to existing traditional heat exchangers and technology that the utility model does not have heat exchange of heat pipe; Have unrivaled technology and economic advantages; And will bring great technological change to design, manufacturing and the operation of Industrial Boiler, station boiler, heating stove etc.; Having broad application prospects in fields such as the recycling of industrial equipment using waste heat from tail gas, combustion air preheating and combustion technologies, is the important technology support that improves efficiency of energy utilization and implement energy-saving and emission-reduction.
Description of drawings
Fig. 1 the utility model does not have particle curtain heat exchange unit sketch map in the heat exchange of heat pipe.
Fig. 2 the utility model does not have the snakelike no heat exchange of heat pipe sketch map of a kind of three grades of heat exchange in the heat exchange of heat pipe.
Fig. 3 the utility model does not have the tubular no heat exchange of heat pipe sketch map of a kind of three grades of straight horizontal in the heat exchange of heat pipe.
Fig. 4 the utility model does not have the heat exchange of heat pipe structural representation.
Fig. 5 reflects that the utility model does not have another kind of conducting element structural representation for the particle guiding in the heat exchange of heat pipe.
The specific embodiment
Fig. 1 shows the basic structure that the utility model does not have heat exchange of heat pipe; As can be seen from the figure this no heat exchange of heat pipe has a particle curtain heat exchange unit 1; This particle curtain heat exchange unit has the tubular gas passage of straight horizontal 11; This gas passage is provided with a particle import 12 and a particle outlet 13, and particle forms particle curtain 14 as heat transferring medium from the particle import to particle outlet.Gas (such as high-temperature flue gas) gets into the horizontal gas passage from the left side, solid particle falls to getting into that the horizontal gas passage forms the grain flow (hereinafter to be referred as the particle curtain) of a curtain shape and meet with high temperature (heat) gas of bottom horizontal flow sheet and to come in contact and convection current and radiation heat transfer take place from the particle import.Calculate with experiment test and show, when the diameter of solid particle less than 250 microns and particle gap 0.98 when above, hot gas and solid particle just can reach balance within 0.1 to 0.01 second, thereby made gas temperature decline, the rising of solid particle temperature.Obviously, the amounts of particles that gets in the flue in the unit interval is many more, and total caloric receptivity of particle is many more, and the thermal discharge of gas is also big more, and the temperature of exit gas is also low more.If there is not gas to flow through in the horizontal flue, promptly gas flow rates is 0 o'clock, and solid particle will form the particle curtain of a vertical drop; And flow through as gas; Be gas flow rates greater than 0 o'clock, then under the effect of gas viscosity power, particle can produce skew from left to right; Make its drop point depart from center line one segment distance of import hopper, thereby form arc particle curtain as shown in Figure 1 in the flue bottom.Research shows that a particle curtain approximately can be accomplished the heat exchange of two theoretical particle curtain heat exchange units.Give an example, if require gas temperature to drop to 150 ℃ from 800 ℃, the heat that utilizes gas is heated to 700 ℃ with particle from 100 ℃, and so theoretical particle curtain heat exchange unit number is (800 – 150)/(800 – 700)=6.5.
On the basis of above-mentioned no heat exchange of heat pipe basic structure; Can design the no heat exchange of heat pipe of multi-form various heat exchange progression; As shown in Figure 2 is a kind of snakelike no heat exchange of heat pipe of three grades of heat exchange, contains three particle curtain heat exchange units in this no heat exchange of heat pipe, can certainly be two, four, five and above particle curtain heat exchange unit; Each particle curtain heat exchange unit is connected to become snakelike through bend pipe, the particle curtain of each particle curtain heat exchange unit is vertically arranged and series connection up and down.Fig. 3 is that a kind of straight horizontal tubular type does not have heat exchange of heat pipe, contains three particle curtain heat exchange units in this no heat exchange of heat pipe of this no heat exchange of heat pipe, and it is tubular to be linked to be straight horizontal between them, and the particle curtain of each particle curtain heat exchange unit is vertically arranged.Particle curtain heat exchange unit in this obviously no heat exchange of heat pipe also can be an any number.No heat exchange of heat pipe more than this two-stage can directly be held two or more particle imports 12 and particle outlet 13 in the above with coiled pipe or horizontal straight tube, to arrange two or more particle curtains as required when reality is made.
As no heat exchange of heat pipe; Also should consider selecting for use and the adjusting of particle curtain and how to make the particle curtain and the problem of the abundant heat exchange of gas and do not have the problem of heat exchange of heat pipe compact conformation of particle; It can also be seen that from Fig. 1 and Fig. 4; Be provided with particle dispensing Control Component 2 at particle import 12 places, and be connected with gas current-sharing member 3 at gas passage 11 front ends.
Selecting for use and the adjusting of particle curtain of particle:
Solid particle employing silica sand and diameter used in the particle curtain heat exchange unit should be less than 250 microns, and the particle voids degree should help reaching between gas and particle the Rapid Thermal balance like this greater than 0.98 in the particle curtain.
The particle curtain is short more good more, helps the residual neat recovering system compact conformation.Shorten particle curtain length two kinds of methods are arranged.First method is to make particle get into gas passage with certain initial velocity, and the particle inlet velocity is high more, and the length of particle curtain can be short more.The fluid bed dispenser that the bottom has osculum can change the initial velocity that particle gets into gas passage.1 meter dark bed can provide about 20
0.5The particle speed of m/s, the bed that 2m is dark can provide about 40
0.5The particle speed of m/s.Actual speed that it should be noted that particle is relevant with fluid bed bottom opening width.Second kind can make the method for particle curtain contraction in length is to make particle get into gas passage against air-flow at a certain angle.
Particle dispensing Control Component is referring to Figure 4 and 5.
In order to make the normal continuously operation of particle curtain in the particle curtain heat exchange unit; And realize efficient heat exchange; It can also be seen that at particle import 12 the utility model from Fig. 1 and Fig. 4 and to have designed particle dispensing Control Component 2, this assembly from top to bottom mainly is made up of particle hopper 21, circular material blanking tube 22, transition conduit 23, rectangle material blanking tube 24, electric butterfly valve 25, porous plate 26, mesh screen 27 and conducting element 28 etc.Wherein, the pore size of porous plate and layout density have determined the maximum through-current capacity of particle; The big I of the unlatching of electric butterfly valve and aperture thereof is controlled the particle curtain thickness of whereabouts in real time; Mesh screen 27 adopts the multi-deck screen host will play the current-sharing effect, even particle evenly distributes on the material blanking tube cross section, finally guarantees the uniformity of distribution of particles on the particle curtain cross section; The main effect of conducting element is that the control grain flow gets into angle and particle curtain thickness in the gas passage; When the angle in the grain flow entering airflow line is suitable; Can with the particle curtain finally fall point control near particle import center line, like this, desired length of straight pipe is less when on the straight horizontal pipeline section, arranging multistage particle curtain; In other words, on the straight length of certain-length, can arrange more particle curtain.
conducting element 28 can adopt fixing tilting platy structure also can adopt the rotatable platy structure of regulating as shown in Figure 4.Conducting element 28 can also adopt the inclination bend pipe structure, and is as shown in Figure 5.If adopt adjustable setting, be in operation and get into the angle in the gas pipeline through the angle control grain flow of regulating conducting element.In addition, this adjustable conducting element matches with the particle material blanking tube, in real time the thickness of control particle curtain.
Gas current-sharing member is referring to Fig. 4.
In order to make the particle in the particle curtain evenly fully contact, reach fast thermal balance, thereby improve the heat exchange efficiency between gas and solid particle curtain, require the Velocity Profiles on the particle curtain admission section even with gas medium.Consider flue gas, air hose in the engineering practical application say (connecing) mouthful incompatible with the air/flue cross sectional shape and the physical dimension of particle curtain particle curtain heat exchange unit; Therefore; Necessarily require a transition tube coupling section that the flue gas in the engineering reality/air outlet slit pipe is not had heat exchange of heat pipe and link up, and flue gas or air draught are evenly distributed on the gas passage section of no heat exchange of heat pipe.Designed gas current-sharing member 3, its structure composition and operation principle are as shown in Figure 4 for this reason.
Consider that the utility model does not have the application of heat exchange of heat pipe; Relevant flue gas/air duct such as at boiler and heating stove has two kinds of typical cross sectional shapes---circle and rectangular duct; For this reason, the utility model provides the gas current-sharing member 3 that connects circular pipe and rectangular duct, will be connected through a transitional pipe segment 4, connecting flange 5 and gas current-sharing member 3 in order between flue gas or air duct and the no heat exchange of heat pipe; Gas current-sharing member 3 can adopt three to the Pyatyi current-sharing, and is as shown in Figure 4.Wherein, first order current-sharing part is for adopting the big orifice plate 31 of the sparse layout of triangle battle array, the about 10mm in aperture, and current-sharing part in the second level is a flute pipeline section 32, and this flute pipeline section is arranged in side by side in the outer straight tube by many little pipes and forms.Third level current-sharing part is the fine and close aperture plate of arranging 33.
The utility model does not have the UTILIZATION OF VESIDUAL HEAT IN that heat exchange of heat pipe can be widely used in some courses of reaction; Such as the boiler air preheat; Can also be used for catalytic reaction and gas absorption, especially can utilize high-temperature flue gas combustion air to be carried out preheating through particle curtain heat exchange unit heat transfer process.
Claims (5)
1. no heat exchange of heat pipe; It is characterized in that this no heat exchange of heat pipe is linked to be by a particle curtain heat exchange unit (1) at least; Said particle curtain heat exchange unit has the tubular gas passage of straight horizontal (11); This gas passage is provided with a particle import (12) and a particle outlet (13), and particle forms particle curtain (14) as heat transferring medium from the particle import to particle outlet, and said particle is an inert solid particle.
2. no heat exchange of heat pipe according to claim 1; It is characterized in that this no heat exchange of heat pipe vertically arranges series connection up and down by bend pipe with the particle curtain (14) that plural at least particle curtain heat exchange unit (1) is linked to be snakelike and each particle curtain heat exchange unit, perhaps this no heat exchange of heat pipe is linked to be the tubular and vertical layout of particle curtain (14) each particle curtain heat exchange unit of straight horizontal by straight tube with plural at least particle curtain heat exchange unit (1).
3. no heat exchange of heat pipe according to claim 2 is characterized in that said particle import (12) locates to be provided with particle dispensing Control Component 2, and this assembly comprises electric butterfly valve (25) and screen cloth (27).
4. no heat exchange of heat pipe according to claim 2 is characterized in that said particle import (12) locates to be provided with the conducting element (28) into the particle guiding.
5. no heat exchange of heat pipe according to claim 2; The gas passage front end that it is characterized in that this no heat exchange of heat pipe is connected with gas current-sharing member (3); Gas gets into gas passage through this current-sharing member; Said gas current-sharing member comprises the big orifice plate of current-sharing bare cloth (31), flute pipeline section (32), the big orifice plate (33) that gathers, and to form the current-sharing of 3-5 level, said flute pipeline section is arranged in side by side in the outer straight tube by many little pipes and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202614052U CN202254929U (en) | 2011-07-22 | 2011-07-22 | Pipeless heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202614052U CN202254929U (en) | 2011-07-22 | 2011-07-22 | Pipeless heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202254929U true CN202254929U (en) | 2012-05-30 |
Family
ID=46116159
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202614052U Expired - Lifetime CN202254929U (en) | 2011-07-22 | 2011-07-22 | Pipeless heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202254929U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288044A (en) * | 2011-07-22 | 2011-12-21 | 湖南天水蓝能源科技有限公司 | Pipeless heat exchanger and residual-heat recovery system |
-
2011
- 2011-07-22 CN CN2011202614052U patent/CN202254929U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288044A (en) * | 2011-07-22 | 2011-12-21 | 湖南天水蓝能源科技有限公司 | Pipeless heat exchanger and residual-heat recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |