CN206208058U - Gas heating system - Google Patents
Gas heating system Download PDFInfo
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- CN206208058U CN206208058U CN201621133993.0U CN201621133993U CN206208058U CN 206208058 U CN206208058 U CN 206208058U CN 201621133993 U CN201621133993 U CN 201621133993U CN 206208058 U CN206208058 U CN 206208058U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The utility model discloses a kind of gas heating system, including：Gas-solids contact apparatus；Heat-exchange system, including outlet temperature elevated at least three-level heat exchanger successively；Gas heats pipeline, and with gas-solids contact apparatus be connected heat-exchange system by it；Collecting system, including at least two different heat collectors of output temperature；Heating agent circulation line, with heat-exchange system be connected the collecting system by it, wherein, the heating agent of the first order heat exchanger at least in three-level heat exchanger is from the minimum heat collector of output temperature at least two heat collectors, the heating agent of the highest heat exchanger at least in three-level heat exchanger from output temperature highest heat collector at least two heat collectors, at least the heating agent of the intergrade heat exchanger in three-level heat exchanger from collecting system in a heat collector or from than its higher leveled heat exchanger.By using at least two heat collectors and the step heat-supplying mode that at least three-level heat exchanger is connected so that the heat resistanceheat resistant load fluctuation of system more preferably, and then improves the thermal efficiency.
Description
Technical field
The utility model is related to chemical field, more particularly, to a kind of gas heating system.
Background technology
High-temperature gas is commonly used in chemical industry to heat solid etc. as thermal medium, it is typical as dry, gas-solid is anti-
Should, calcining and other processes.Because the heat transfer efficiency of gas-solid is relatively low, during these, it usually needs a large amount of gases are heated into height
Temperature, temperature is from tens degree to thousands of degree.The thermal source of usual hot gas includes burning coal, natural gas or electric heat supply, energy resource consumption
Height, is one of important source of CO2 emission.
Solar energy high-temperature heat collection technology is heat energy supply technology fast-developing in recent years.Current commercialized high temperature collection
Hot systems can provide the thermal source that temperature reaches 450 DEG C, and heating agent includes conduction oil and steam etc., and in high-temperature heat-gathering electricity
Stand, steam injection recover the oil etc. aspect carried out commercial Application.
Industrially the gas heating process (temperature is less than 400 DEG C) of low temperature can directly use solar energy high-temperature heat collection in some
Heat supply, and some pyroprocesses then can be preheated first using solar energy high-temperature heat collection, then reuse natural gas or electricity adds
Heat, so as to eliminate or reduce the use of carbon based energy source and the discharge of carbon dioxide.But, by the use of solar energy high-temperature heat collection as gas
The thermal source of body, also in the presence of some technological difficulties：As solar thermal collector load is serious by natural environment influence, heat supply and temperature
The stability of degree, it is impossible to the need for meeting continuous and stable production；Raised with temperature, the efficiency of solar thermal collector declines, cost
Significantly rise etc..Therefore need according to the characteristics of solar energy high-temperature heat collection, to design new gas heat supply and heat-exchange system.
Utility model content
In view of the above problems, the purpose of this utility model is to provide a kind of gas heating system, its heat resistanceheat resistant load fluctuation
Property more preferably, the thermal efficiency is higher.
According to a kind of gas heating system that the utility model is provided, including：Gas-solids contact apparatus；Heat-exchange system, including
Outlet temperature elevated at least three-level heat exchanger successively, the highest heat exchanger at least three-level heat exchanger is located at the gas
On affixed tactile device；Gas heats pipeline, and the gas heating pipeline connects the heat-exchange system with the gas-solids contact apparatus
Connect so that the gas in the gas heating pipeline is heated and the solid in the gas-solids contact apparatus by the heat-exchange system
Contact；Collecting system, including at least two different heat collectors of output temperature；Heating agent circulation line, the heating agent circulation pipe
With the heat-exchange system be connected the collecting system by road so that the heating agent of the heating agent circulation line internal circulation flow is by institute
State after collecting system heating with the heat-exchange system in the gas converting heat, wherein, at least three-level heat exchanger the
The heating agent of first-class heat exchanger is from the minimum heat collector of output temperature at least two heat collector, at least three-level
The heating agent of the highest heat exchanger in heat exchanger comes from output temperature highest heat collector at least two heat collector,
The heating agent of the intergrade heat exchanger at least three-level heat exchanger is from a thermal-arrest at least two heat collector
Device or from than its higher leveled heat exchanger.
Preferably, the gas heating system also includes：Gas circulation line, the gas circulation line is by the gas-solid
Contact device is connected with gas heating pipeline so that the gas of the gas-solids contact apparatus output is at least partly recycled to institute
In stating heat-exchange system.
Preferably, the gas circulation line is provided with the first valve, gas-solid contact dress described in first Valve controlling
The flow of the recyclegas that the heat-exchange system is at least partly recycled in the gas of output is put, the flow of the recyclegas is small
In 80% of the total flow equal to the gas-solids contact apparatus output gas.
Preferably, the gas heating system also includes：At least one gas circulation is bypassed, and at least one gas is followed
With gas input be connected the gas output end of corresponding heat exchanger at least three-level heat exchanger by each in ring bypass,
So that the gas mixing of a part for the gas of the corresponding heat exchanger output and input, the gas circulation bypass is provided with
Measurement and control of temperature instrument and the second valve, the measurement and control of temperature instrument control second valve, described in second Valve controlling
Flow in the gas of corresponding heat exchanger output with the bypass circuit gas of the gas mixing of input, the bypass circuit gas
Gas of the flow less than or equal to the corresponding heat exchanger output total flow 60%.
Preferably, the gas heating system also includes：Compensating heating device, the compensating heating device is arranged on described
On heating agent circulation line, positioned at the downstream of the collecting system and the upstream of the heat-exchange system so that the heating agent is by institute
Enter the heat-exchange system after stating collecting system and compensating heating device heating.
Preferably, the compensating heating device is located at output temperature highest collection hot charging at least two heat collector
The downstream put and the upstream of the highest heat exchanger.
Preferably, the collecting system is solar thermal collection system.
Preferably, the solar thermal collection system includes：Middle temperature solar heat collecting device and high temperature solar heat collecting device,
The middle temperature solar heat collecting device output heat medium temperature is 50 to 250 DEG C, and the high temperature solar heat collecting device exports heating agent
Temperature is 200 to 600 DEG C.
Preferably, the solar thermal collection system also includes：Regenerative apparatus, the regenerative apparatus and the high temperature solar
Heat collector is connected.
Preferably, the highest heat exchanger is pipe heat exchanger, and the pipe heat exchanger is located at the gas-solid contact dress
In the chamber put.
Preferably, the highest heat exchanger is jacketed type exchanger, and the jacketed type exchanger is located at the gas-solid and connects
Touch the case surface of device.
Preferably, the heat-exchange system includes three-level heat exchanger, and the three-level heat exchanger is respectively：First order heat exchanger,
Intergrade heat exchanger, highest heat exchanger.
Preferably, the ratio between the highest heat exchanger and thermic load of the intergrade heat exchanger are 0.2:1 to 0.8:1,
The temperature rise of the highest heat exchanger hot gas is less than or equal to 100 DEG C.
Preferably, the heating agent includes：Liquid heat medium, gas heating agent.
According to gas heating system of the present utility model, it is connected with least three-level heat exchanger using at least two heat collectors
Step heat-supplying mode so that the heat resistanceheat resistant load fluctuation of system more preferably, and then improves the thermal efficiency.
In a preferred embodiment, the collecting system is solar thermal collection system, by using solar energy heat collector
Combined with above-mentioned step heat-supplying mode, reduced the cost directly using high temperature solar heat collecting device, energy resource consumption is low, with biography
System gas heating system compares the discharge that can reduce greenhouse gases.
In a preferred embodiment, gas circulation line is set, gas is improved by heat exchanger and gas-solids contact apparatus
Flow, improves rate of heat transfer, while identical heat is carried with lower temperature, so as to reduce the requirement to heat source temperature,
Further increase the ability of heat resistanceheat resistant load fluctuation.
Brief description of the drawings
By description referring to the drawings to the utility model embodiment, of the present utility model above-mentioned and other mesh
, feature and advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the structure chart of the gas heating system according to the utility model first embodiment.
Fig. 2 shows the structure chart of the gas heating system according to the utility model second embodiment.
Fig. 3 shows the structure chart of the gas heating system according to the utility model 3rd embodiment.
Specific embodiment
The utility model is more fully described hereinafter with reference to accompanying drawing.For the sake of clarity, the various pieces in accompanying drawing do not have
Have drawn to scale.Furthermore, it is possible to not shown some known parts.Describe hereinafter of the present utility model many specific
Details, but just as the skilled person will understand, this can not be realized according to these specific details
Utility model.
Fig. 1 shows the structure chart of the gas heating system according to the utility model specific embodiment.The gas heating system
System includes：Gas-solids contact apparatus 110, heat-exchange system, gas heating pipeline 130, collecting system, heating agent circulation line 150, wherein
Heat-exchange system includes outlet temperature elevated at least three-level heat exchanger successively, and at least three-level heat exchanger includes：The first order exchanges heat
Device, intergrade heat exchanger and highest heat exchanger, highest heat exchanger are located on gas-solids contact apparatus 110, gas heating tube
With gas-solids contact apparatus 110 be connected heat-exchange system by road 130 so that the gas in gas heating pipeline 130 is by heat-exchange system
After heating with gas-solids contact apparatus 110 in solid contact.Collecting system includes at least two different collection hot chargings of output temperature
Put, with heat-exchange system be connected collecting system by heating agent circulation line 150 so that the heat of the internal circulation flow of heating agent circulation line 150
Matchmaker by collecting system heating after with heat-exchange system in the gas converting heat, the high-temperature gas obtained after heat exchange can be as warm
Medium is heated in gas-solids contact apparatus 110 to solid etc., and such as drying, gas-solid reaction, calcining and other processes occur.Above-mentioned
In the connection of collecting system and heat-exchange system, the heating agent of first order heat exchanger is from output temperature at least two heat collector
The minimum heat collector of degree, the heating agent of highest heat exchanger is from output temperature highest collection at least two heat collector
Thermal, the heating agent of intergrade heat exchanger is from a heat collector at least two heat collector or from than it
Higher leveled heat exchanger.For example, heat-exchange system includes Pyatyi heat exchanger, collecting system includes three heat collectors, above-mentioned thermal-arrest
In the connection of system and heat-exchange system, output temperature is minimum in three heat collectors of first order heat exchanger and this one is connected,
To realize that heating agent is circulated in the minimum heat collector of the output temperature with first order heat exchanger, level V heat exchanger is most
Output temperature highest one is connected in three heat collectors of senior heat exchanger and this, to realize heating agent in the output temperature highest
Heat collector and level V heat exchanger in be circulated, and changed as the second level heat exchanger of intergrade heat exchanger, the third level
Hot device, fourth stage heat exchanger, its heating agent input can be connected with one of them in three heat collectors, it is also possible to
The heating agent output end of heat exchanger more higher leveled than itself is connected, but to ensure the outlet temperature of the heat exchangers at different levels that heat-exchange system includes
Degree is raised successively, and by taking the heat exchanger of the second level as an example, its heating agent input can be with above three heat collector a thermal-arrest
Device is connected, it is also possible to be connected with the heating agent output end of third level heat exchanger, and its heating agent source can come from heat collector,
Can be from third level heat exchanger.
Gas heating system also includes in the present embodiment：Gas circulation line 160, it is by gas-solids contact apparatus 110 and gas
Body heating pipeline 130 is connected so that the gas of the gas-solids contact apparatus 110 output is at least partly recycled in heat-exchange system.Its
In, gas circulation line is provided with gas-solid separating device 161, solid for the product that gas-solids contact apparatus 110 are exported to be separated into
A part in body 192 and gas, wherein gas as recyclegas into recycling in heat-exchange system, another part conduct
Tail gas 193 is discharged outside the gas heating system.Can directly be mixed with live gas into the recyclegas of heat-exchange system
Close, the gas input that first order heat exchanger is exchanged heat, or enters intergrade heat exchanger is entered back into, with the gas
The gas for completing heat exchange in heating pipeline 130 in preceding some grades of heat exchangers is mixed, and is changed into the intergrade jointly
Hot device is exchanged heat.
Further, gas circulation line 160 is provided with the first valve 162, and the first valve 162 controls the stream of recyclegas
Amount, it is preferable that 80% of the flow of the recyclegas less than or equal to the total flow of the output gas of gas-solids contact apparatus 110.
Used as preferred embodiment, heat-exchange system includes three-level heat exchanger：First order heat exchanger 121, second level heat exchanger
122 and third level heat exchanger 123, the highest heat exchangers of 123 grades of third level heat exchanger, it is located on gas-solids contact apparatus.The
First-class heat exchanger 121 be used for preheat cryogenic gas, the cryogenic gas can be enter system live gas 191, or
The mixed gas of live gas 191 and recyclegas；The gas that second level heat exchanger 122 is used for heating after preheating produces High Temperature Gas
Body, the gas into second level heat exchanger 122 can be the preheating gas from the first order, it is also possible to the pre- hot gas of the first order
The mixed gas of body and recyclegas；Third level heat exchanger 123 is used for heating the gas in gas-solids contact apparatus 110, so that its
Temperature required for maintaining production.In the present embodiment, gas circulation line 160 is input into the gas of first order heat exchanger 121
End is connected so that after recyclegas mixes with live gas, common to be preheated into first order heat exchanger 121.
Further, the gas heating system also includes：At least one gas circulation is bypassed, and in the present embodiment, sets one
With gas input be connected the gas output end of second level heat exchanger by individual gas circulation bypass 170 so that second level heat exchanger
A part for the gas of output is recycled at itself gas input, and the gas with input is mixed, it is preferable that gas circulation
Bypass 170 is provided with the valve 172 of measurement and control of temperature instrument 171 and second, and measurement and control of temperature instrument 171 controls opening for the second valve 172
Degree, the second valve 172 controls the bypass circuit with the gas mixing of input in the gas of corresponding second level heat exchanger 122 output
The flow of gas, it is preferable that gas of the flow of the bypass circuit gas less than or equal to the output of corresponding second level heat exchanger 122
The 60% of the total flow of body.It is understood that the quantity of gas circulation bypass is not limited to one, the multistage that heat-exchange system includes
Any one heat exchanger in heat exchanger, can be correspondingly arranged a gas and follow between its gas output end and gas input
Ring is bypassed.Bypassed by setting gas circulation, when system heat load is in a slight decrease, biography is strengthened by improving the flow velocity of gas
Heat, can make up the problem of the driving force of heat transfer reduction that heat medium temperature reduction is caused.
Collecting system is preferably solar thermal collection system, and in the present embodiment, solar thermal collection system includes：Middle temperature solar
Heat collector 141 and high temperature solar heat collecting device 142, middle temperature solar heat collecting device 141 include it is various being capable of output temperature
Be 50 to 250 DEG C of middle low-temperature solar energy heat collectors of heating agent, high temperature solar heat collecting device 142 include it is various being capable of output temperature
It is 200 to 600 DEG C of high-temp solar heat collectors of heating agent.Further, the solar thermal collection system also includes：Regenerative apparatus
143, it is connected with the high temperature solar heat collecting device 142.It is understood that regenerative apparatus 143 is not required, another
In outer embodiment, regenerative apparatus 143 can be not provided with；The gas heating system can be caused by setting regenerative apparatus 143
Heat resistanceheat resistant load fluctuation more preferably, regenerative apparatus 143 include the various physically or chemically storages with liquid or solid as heat storage medium
Hot device.In addition, collecting system should be not limited in the present embodiment including two heat collectors, in a further embodiment, collection
Hot systems can include the different heat collectors of other quantity such as three or four of output temperature.
In the collecting system of the present embodiment and the connection of heat-exchange system, first order heat exchanger 121 and middle temperature solar heat collecting
Device 141 is connected by the closed loop of heating agent circulation line 150, and the heating agent in first order heat exchanger 121 comes from middle temperature solar heat collecting
Device 141 heats the heating agent for obtaining；Third level heat exchanger 123, second level heat exchanger 122, high temperature solar heat collecting device 142,
Regenerative apparatus 143 passes sequentially through the connection of the closed loop of heating agent circulation line 150 so that the heating agent of third level heat exchanger 123 comes from high temperature
Solar energy heat collector 142 heats the heating agent for obtaining, the heat of the heating agent from third level heat exchanger 123 of second level heat exchanger 122
The heating agent of matchmaker's output end outflow.Heating agent can be liquid heat medium, preferably gas heating agent, liquid heat medium, and the heating agent is in heating agent
Circulated in circulation line 150, heated in heat collector, exchanged heat in heat exchanger.
The heat exchangers at different levels that heat-exchange system includes, except the described highest heat exchanger on gas-solids contact apparatus 110
(third level heat exchanger i.e. in the present embodiment) outward, may each be various forms of two-phase heat exchangers, such as tubular heat exchanger；Should
The form of highest heat exchanger includes pipe heat exchanger, jacketed type exchanger.If the form of the highest heat exchanger uses tubular type
Heat exchanger tubular type, it is located in the chamber of gas-solids contact apparatus 110, and gas can flow through its surface；If the highest heat exchanger
Form uses jacketed type exchanger, its case surface for being located at the gas-solids contact apparatus.
The thermic load of the three-level heat-exchange system of the present embodiment, wherein third level heat exchanger 123 and second level heat exchanger 122 it
Than being 0.2:1 to 0.8:1, the temperature rise of the hot gas of third level heat exchanger 123 is less than or equal to 100 DEG C.
The detail to the gas heating system of first embodiment by taking calcination reaction as an example carries out example, related skill below
Art personnel should be appreciated that can not realize the utility model according to these specific details.
Solar thermal collection system uses groove type solar collecting system, and heating agent is conduction oil.Middle temperature collector 141 is exported
150 to 180 DEG C of temperature, power output 4 to 9KW；380 to 420 DEG C of 142 output temperature of high-temperature heat-gathering device, power output 12 to
16KW.Gas uses air, first order heat exchanger 121 and second level heat exchanger 122 to use tubular heat exchanger.Fresh air
191 temperature is 25 DEG C, and the temperature from the recyclegas of the outflow of gas-solids contact apparatus 110 is 70 to 90 DEG C (recycle ratio is 0.6),
Recyclegas is increased to 120 to 130C DEG C after being exchanged heat through first order heat exchanger 121 after mixing with live gas 191, then enters
Second level heat exchanger 122.The heating of temperature collector 141 is changed into middle warm matchmaker during heating agent passes through, and middle warm matchmaker changes into the first order
It is changed into continuation heating during low temperature heating agent is back to middle temperature collector 141 with gas converting heat in hot device 121 and is changed into middle warm matchmaker.The
Gas after the gas circulation bypass 170 that the two ends of secondary heat exchanger 122 are provided with can heat part is recirculated back to second level heat exchange
Device is heated, and recycle ratio is 0.1 to 0.4, and its numerical value can be according to the temperature adjustment of heating agent.When the temperature of heating agent is at 380 to 420 DEG C
When scope fluctuates, by adjusting recycle ratio, air-stable is at 275 to 290 DEG C after can making to be heated through second level heat exchanger.Gas-solid connects
It is gas-solid fluidized bed reactor to touch device 110, and gas exchanges heat in gas-solids contact apparatus 110 (in the case of without solid) through the third level
To 320 to 330 DEG C, third level heat exchanger 123 uses coil heat exchanger, heating agent to pass through to the lifting of the further temperature after heating of device 123
The heating of high-temperature heat-gathering device 142 is changed into high temperature heating agent and stores the accumulation of heat in regenerative apparatus 143, and high temperature heating agent first passes through the third level
Gas in the heating gas-solids contact apparatus 110 of heat exchanger 123, then flows into second level heat exchanger 122, through second level heat exchanger again
Low temperature heating agent after 122 heat exchange returns to high-temperature heat-gathering device 142 to be continued to be heated to be high temperature heating agent and is circulated, from third level heat exchange
The heat medium temperature of the outflow of device 123 is 350 to 370 DEG C, the ratio between thermic load of third level heat exchanger 123 and second level heat exchanger 122
It is 0.42:1.
According to above-mentioned gas heating system, supplied with the step that at least three-level heat exchanger is connected using at least two heat collectors
Hot mode, reduces the cost directly using high temperature solar heat collecting device, also causes the heat resistanceheat resistant load fluctuation of system more preferably,
And then improve the thermal efficiency.The method for taking gas circulation, by improving gas by heat exchanger and the flow of gas-solids contact apparatus,
Rate of heat transfer is improved, while identical heat is carried with lower temperature, so as to reduce the requirement to heat source temperature, further
Improve the ability of heat resistanceheat resistant load fluctuation.
Fig. 2 shows the structure chart of the gas heating system according to the utility model second embodiment.Hereinafter will be explained in detail
The difference of second embodiment and first embodiment, something in common is no longer described in detail.
Substantially phase in the heat-exchange system of the present embodiment, collecting system and annexation between the two and first embodiment
Together, heat-exchange system includes three-level heat exchanger：First order heat exchanger 221, second level heat exchanger 222 and third level heat exchanger 223,
Collecting system includes：Middle temperature solar heat collecting device 241 and high temperature solar heat collecting device 242, third level heat exchanger 223 are located at
On gas-solids contact apparatus 210, first order heat exchanger 221 is closed with middle temperature solar heat collecting device 241 by heating agent circulation line 250
Ring is connected, the heating agent that the heating agent in first order heat exchanger 221 is obtained from the heating of middle temperature solar heat collecting device 241；The third level
Heat exchanger 223, second level heat exchanger 222, high temperature solar heat collecting device 242 pass sequentially through the closed loop of heating agent circulation line 250 company
Connect so that the heating agent of third level heat exchanger 223 heats the heating agent for obtaining from high temperature solar heat collecting device 242, and the second level is changed
The heating agent of heating agent output end outflow of the heating agent of hot device 222 from third level heat exchanger 223.The heating agent is in heating agent circulation line
Circulated in 250, heated in heat collector, exchanged heat in heat exchanger.Gas circulation line 260 is by gas-solids contact apparatus
210 are connected with gas heating pipeline 230 so that the gas of the output of the gas-solids contact apparatus 210 is at least partly recycled to described
In heat-exchange system.
Gas circulation line 260 is provided with gas-solid separating device 261, for the product for exporting gas-solids contact apparatus 210
Be separated into solid 292 and gas, wherein the part in gas as recyclegas into recycling in heat-exchange system, it is another
Discharged outside the gas heating system as tail gas 293 part.In the present embodiment, gas circulation line 260 is by gas-solids contact apparatus
210 are connected with the gas input of first order heat exchanger 221 so that recyclegas enters jointly after mixing with live gas 291
First order heat exchanger 221 is exchanged heat.
Further, gas circulation line 260 is provided with the first valve 262, and the first valve 262 controls the stream of recyclegas
Amount, it is preferable that 80% of the flow of the recyclegas less than or equal to the total flow of the output gas of gas-solids contact apparatus 210.
From unlike the utility model first embodiment, the gas heating system is not provided with regenerative apparatus, is also not provided with
Gas circulation is bypassed, but including：Compensating heating device 280.Compensating heating device 280 is arranged on heating agent circulation line 250, its
Positioned at the downstream of the collecting system and the upstream of the heat-exchange system so that heating agent is by collecting system and compensating heating device
Heat-exchange system is entered back into after 280 heating.It is further preferred that the compensating heating device 280 is high positioned at output temperature highest
The downstream of temperature solar heat collecting device 242 and the highest heat exchanger are the upstream of third level heat exchanger.Compensating heating device
280 be further improve high temperature heat medium temperature heating system, including various burning solids, liquids and gases fuel heating dress
Put, various electric heater units or other available thermals source, the temperature that it is provided is higher than high temperature solar heat collecting device 242
Export the temperature of heating agent.When too heat energy collecting system thermic load is unstable, compensating heating device 280 can also provide heat,
To ensure that high temperature heat medium temperature meets needs.Before compensating heating device 280 is located at highest heat exchanger, for heating from thermal-arrest system
The heating agent of the maximum temperature flowed out in system.
The detail to the gas heating system of second embodiment by taking calcination reaction as an example carries out example, related skill below
Art personnel should be appreciated that can not realize the utility model according to these specific details.
Solar thermal collection system uses groove type solar collecting system, and heating agent is conduction oil.Middle temperature collector 241 is exported
150 to 180 DEG C of temperature, power output 4 to 9KW；320 to 360 DEG C of 242 output temperature of high-temperature heat-gathering device, power output 10 to
16KW.Compensating heating device 280 be electric heating system, heating power 4 to 8KW, compensated heater 280 heat after, high temperature
Heat medium temperature brings up to 420 to 440 DEG C.Gas is air, and first order heat exchanger 221 and second level heat exchanger 222 use tubulation
Formula heat exchanger, the temperature of fresh air 291 is 25 DEG C, from the temperature of the recyclegas of the outflow of gas-solids contact apparatus 210 for 70 to
90 DEG C (recycle ratio is 0.6), it is preheated after mixing with fresh air 291 into first order heat exchanger 221, through first order heat exchanger
Be increased to 120 to 130 DEG C after heat exchange, and after exchanged heat through second level heat exchanger 222 after reach 280 to 290 DEG C.Gas-solids contact apparatus
210 is gas-solid fluidized bed reactor, and gas (uses disk in gas-solids contact apparatus (in the case of without solid) through third level heat exchanger
Heat exchange of heat pipe) 223 further temperature after heating liftings are to 340 to 360 DEG C.Temperature collector 241 adds during a part of heating agent passes through
Heat is changed into middle warm matchmaker, and middle warm matchmaker is interior into first order heat exchanger 221 and gas converting heat is changed into low temperature heating agent and is back to middle temperature
Continue heating in heat collector 241 and be changed into middle warm matchmaker.Another part heating agent is changed into high temperature by the heating of high-temperature heat-gathering device 242
Heating agent is further heated by compensating heating device 280 again, and high temperature heating agent first passes through the heating gas-solid of third level heat exchanger 223 afterwards
Gas in contact device 210, then flows into second level heat exchanger 222 again, the Low Temperature Thermal after being exchanged heat through second level heat exchanger 222
Matchmaker returns to high-temperature heat-gathering device 242 and continues to be heated to be high temperature heating agent and is circulated.From the heating agent temperature of the outflow of third level heat exchanger 223
It is 370 to 390 DEG C to spend, and the ratio between thermic load of third level heat exchanger 223 and second level heat exchanger 222 is 0.38:1.
According to above-mentioned gas heating system, supplied with the step that at least three-level heat exchanger is connected using at least two heat collectors
Hot mode, reduces the cost directly using high temperature solar heat collecting device, also causes the heat resistanceheat resistant load fluctuation of system more preferably,
And then improve the thermal efficiency.The method for taking gas circulation, by improving gas by heat exchanger and the flow of gas-solids contact apparatus,
Rate of heat transfer is improved, while identical heat is carried with lower temperature, so as to reduce the requirement to heat source temperature, further
Improve the ability of heat resistanceheat resistant load fluctuation.
Fig. 3 shows the structure chart of the gas heating system according to the utility model 3rd embodiment.Hereinafter will be explained in detail
The difference of 3rd embodiment and second embodiment, something in common is no longer described in detail.
The heat-exchange system of the present embodiment, collecting system, compensating heating device and the annexation between them and second
Roughly the same in embodiment, heat-exchange system includes three-level heat exchanger：First order heat exchanger 321, second level heat exchanger 322 and
Three-level heat exchanger 323, collecting system includes：Middle temperature solar heat collecting device 341 and high temperature solar heat collecting device 342, the 3rd
Level heat exchanger 323 is located on gas-solids contact apparatus 310, and first order heat exchanger 321 is with middle temperature solar heat collecting device 341 by heat
The closed loop of matchmaker's circulation line 350 is connected, and the heating agent in first order heat exchanger 321 is heated from middle temperature solar heat collecting device 341
The heating agent for arriving；Third level heat exchanger 323, second level heat exchanger 322, high temperature solar heat collecting device 342 and compensation heating dress
Put 380 and pass sequentially through the connection of the closed loop of heating agent circulation line 350 so that the heating agent of third level heat exchanger 323 comes from high temperature solar
Heat collector 342 is heated and reheats the heating agent for obtaining by compensating heating device 380, and the heating agent of second level heat exchanger 322 comes from
The heating agent of the heating agent output end outflow of third level heat exchanger 323.The heating agent is circulated in heating agent circulation line 350,
Heated in heat collector, exchanged heat in heat exchanger.Gas-solids contact apparatus 310 and gas are heated pipeline by gas circulation line 360
330 connections so that the gas of the output of the gas-solids contact apparatus 310 is at least partly recycled in the heat-exchange system.
Gas circulation line 360 is provided with gas-solid separating device 361, for the product for exporting gas-solids contact apparatus 310
Be separated into solid 392 and gas, wherein the part in gas as recyclegas into recycling in heat-exchange system, it is another
Discharged outside the gas heating system as tail gas 393 part.
From unlike second embodiment, in the present embodiment, gas circulation line 360 is by gas-solids contact apparatus 310 and
The gas input connection of secondary heat exchanger 322, this scheme is applied to when the recyclegas of the output of gas-solids contact apparatus 310
Situation when temperature is higher, therefore recyclegas and the gas mixing after the preheating of first order heat exchanger 321, jointly into the second level
Heat exchanger 322, then again by entering gas-solids contact apparatus 310 after the heating of second level heat exchanger 322.
Further, gas circulation line 360 is provided with the first valve 362, and the first valve 362 controls the stream of recyclegas
Amount, it is preferable that 80% of the flow of the recyclegas less than or equal to the total flow of the output gas of gas-solids contact apparatus 310.
The detail to the gas heating system of 3rd embodiment by taking calcination reaction as an example carries out example, related skill below
Art personnel should be appreciated that can not realize the utility model according to these specific details.
Collecting system uses groove type solar collecting system, and heating agent is conduction oil.The output temperature of middle temperature collector 241
150 to 180 DEG C, power output 4 to 9KW.320 to 360 DEG C of 342 output temperature of high-temperature heat-gathering device, power output 10 to 16KW.
Compensating heating device 380 is electric heating system, heating power 4 to 8KW.After compensated heating system 380 is heated, high temperature heating agent temperature
Degree brings up to 420 to 440 DEG C.Gas is air, and first order heat exchanger 321 and second level heat exchanger 322 are exchanged heat using shell and tube
Device, the temperature of fresh air 391 is 25 DEG C, and it is increased to 120 to 140 DEG C after being exchanged heat through first order heat exchanger 321；Connect from gas-solid
The temperature for touching the recyclegas of the output of device 310 is 180 to 205 DEG C (recycle ratio is 0.6), and recyclegas exchanges heat with through the first order
Heated into second level heat exchanger 322 after the gas mixing of the preheating of device 321, temperature reaches 290 to 300 DEG C after heat exchange.Gas-solid connects
It is gas-solid fluidized bed reactor to touch device 310, (is used through third level heat exchanger in gas-solids contact apparatus (in the case of without solid)
Coil heat exchanger) 323 further heating after lifted to 340 to 360 DEG C.Temperature collector 341 is heated during a part of heating agent passes through
It is changed into middle warm matchmaker, middle warm matchmaker is interior into first order heat exchanger 321 and gas converting heat is changed into low temperature heating agent and is back to Zhong Wenji
Continue heating in thermal 341 and be changed into middle warm matchmaker.Another part heating agent is changed into warm high by the heating of high-temperature heat-gathering device 342
Matchmaker is further heated by compensating heating device 380 again, and high temperature heating agent first passes through the heating gas-solid of third level heat exchanger 323 and connects afterwards
The gas in device 310 is touched, second level heat exchanger 322 is then flowed into again, the low temperature heating agent after being exchanged heat through second level heat exchanger 322
Return to high-temperature heat-gathering device 342 and continue to be heated to be high temperature heating agent and be circulated.From the heat medium temperature of the outflow of third level heat exchanger 323
It it is 375 to 395 DEG C, the ratio between thermic load of third level heat exchanger 323 and second level heat exchanger 322 is 0.32:1.
Above-mentioned parameter with gas-solids contact apparatus 310 without solid as situation is illustrated, below again with the heat of a hydrated magnesium chloride
Alternate embodiment (having solid in gas-solids contact apparatus) as a example by decomposition reaction to above-described embodiment is illustrated, correlation technique people
Member is it should be appreciated that the utility model can not be realized according to these specific details.
In alternate embodiments, the parameter and its output heat medium temperature of collecting system and compensating heating device 380 are with this
Data shown in utility model second embodiment, gas still uses air, first order heat exchanger 321 and second level heat exchanger 322
Using tubular heat exchanger, the temperature of fresh air 391 is 25 DEG C, and it is increased to 120 to 140 after being exchanged heat through first order heat exchanger
℃；From gas-solids contact apparatus 310 output recyclegas temperature be 190 to 205 DEG C (recycle ratio is 0.6), recyclegas with
Through being heated into second level heat exchanger 322 after the gas mixing that first order heat exchanger 321 is preheated, reached after second level heat exchange 322
To 290 to 305 DEG C.Gas-solids contact apparatus 310 are gas-solid fluidized bed reactor, and the air after heating enters gas-solid fluidized bed reaction
Device simultaneously heats the hydrated magnesium chloride (initial temperature is 90 DEG C) into gas-solids contact apparatus 310, is allowed to occur thermal decomposition instead
Basic magnesium chloride should be generated.Third level heat exchanger 323 is located at the middle part of gas-solids contact apparatus 310, will can wherein be down to 260 DEG C of sky
Gas increases again to 290 DEG C, and the heat medium temperature from the output of third level heat exchanger 323 is 375 to 390 DEG C, third level heat exchanger 323
It is 0.33 with the ratio between the thermic load of second level heat exchanger 322:1, this system can produce basic magnesium chloride 5kg per hour.
According to above-mentioned gas heating system, supplied with the step that at least three-level heat exchanger is connected using at least two heat collectors
Hot mode, reduces the cost directly using high temperature solar heat collecting device, also causes the heat resistanceheat resistant load fluctuation of system more preferably,
And then improve the thermal efficiency.The method for taking gas circulation, by improving gas by heat exchanger and the flow of gas-solids contact apparatus,
Rate of heat transfer is improved, while identical heat is carried with lower temperature, so as to reduce the requirement to heat source temperature, further
Improve the ability of heat resistanceheat resistant load fluctuation.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.But between entity that the term first order and second level etc. are associated or operation
Order cannot overturn, such as in above-described embodiment gas must first pass through the first order heat exchanger preheating, recycle the second level
Heat exchanger is heated.Term " including ", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion so that
Process, method, article or equipment including a series of key elements not only include those key elements, but also including being not expressly set out
Other key elements, or also include be this process, method, article or the intrinsic key element of equipment.Without more limits
In the case of system, the key element limited by sentence "including a ...", it is not excluded that the process including the key element, method,
Also there is other identical element in article or equipment.
According to embodiment of the present utility model as described above, these embodiments do not have all of details of detailed descriptionthe,
Also it is only described specific embodiment not limit the utility model.Obviously, as described above, many modifications and change can be made
Change.This specification is chosen and specifically describes these embodiments, is to preferably explain that principle of the present utility model and reality should
With so that skilled artisan can repairing using the utility model and on the basis of the utility model well
Change and use.The utility model is only limited by claims and its four corner and equivalent.
Claims (14)
1. a kind of gas heating system, it is characterised in that including：
Gas-solids contact apparatus；
Heat-exchange system, including outlet temperature elevated at least three-level heat exchanger, the highest at least three-level heat exchanger successively
Level heat exchanger is located on the gas-solids contact apparatus；
Gas heats pipeline, and with the gas-solids contact apparatus be connected the heat-exchange system by the gas heating pipeline so that institute
The gas stated in gas heating pipeline is heated and the solid contact in the gas-solids contact apparatus by the heat-exchange system；
Collecting system, including at least two different heat collectors of output temperature；
With the heat-exchange system be connected the collecting system by heating agent circulation line, the heating agent circulation line so that the heat
The heating agent of matchmaker's circulation line internal circulation flow is changed by after collecting system heating with the gas in the heat-exchange system
Heat；
Wherein, the heating agent of the first order heat exchanger at least three-level heat exchanger is from defeated at least two heat collector
Go out the minimum heat collector of temperature, the heating agent of the highest heat exchanger at least three-level heat exchanger comes from described at least two
Output temperature highest heat collector in heat collector, the heating agent of the intergrade heat exchanger at least three-level heat exchanger comes from
A heat collector at least two heat collector or from than its higher leveled heat exchanger.
2. gas heating system according to claim 1, it is characterised in that also include：
With gas heating pipeline be connected the gas-solids contact apparatus by gas circulation line, the gas circulation line, makes
The gas for obtaining the gas-solids contact apparatus output is at least partly recycled in the heat-exchange system.
3. gas heating system according to claim 2, it is characterised in that the gas circulation line is provided with the first valve
Door, following for the heat-exchange system is at least partly recycled in the gas of gas-solids contact apparatus output described in first Valve controlling
The flow of ring gas, the flow of the recyclegas is less than or equal to the total flow of the gas-solids contact apparatus output gas
80%.
4. gas heating system according to claim 1, it is characterised in that also include：
At least one gas circulation is bypassed, each at least one gas circulation bypass will described at least three-level heat exchanger
In the gas output end of corresponding heat exchanger be connected with gas input so that the one of the gas of the corresponding heat exchanger output
Part and the gas mixing being input into, the gas circulation bypass are provided with measurement and control of temperature instrument and the second valve, and the temperature is surveyed
Control instrument controls second valve, the gas in the gas of corresponding heat exchanger output described in second Valve controlling with input
The flow of the bypass circuit gas of body mixing, the flow of the bypass circuit gas is less than or equal to the corresponding heat exchanger output
Gas total flow 60%.
5. gas heating system according to claim 1, it is characterised in that also include：
Compensating heating device, the compensating heating device is arranged on the heating agent circulation line, positioned at the collecting system
Downstream and the upstream of the heat-exchange system so that the heating agent is by after the collecting system and compensating heating device heating
Into the heat-exchange system.
6. gas heating system according to claim 5, it is characterised in that the compensating heating device be located at it is described at least
The upstream of the downstream of output temperature highest heat collector and the highest heat exchanger in two heat collectors.
7. gas heating system according to claim 1, it is characterised in that the collecting system is solar energy heating system
System.
8. gas heating system according to claim 7, it is characterised in that the solar thermal collection system includes：Middle temperature
Solar energy heat collector and high temperature solar heat collecting device, the middle temperature solar heat collecting device output heat medium temperature be 50 to
250 DEG C, the high temperature solar heat collecting device output heat medium temperature is 200 to 600 DEG C.
9. gas heating system according to claim 8, it is characterised in that the solar thermal collection system also includes：Store
Thermal, the regenerative apparatus is connected with the high temperature solar heat collecting device.
10. gas heating system according to claim 1, it is characterised in that the highest heat exchanger is pipe type heat transfer
Device, the pipe heat exchanger is located in the chamber of the gas-solids contact apparatus.
11. gas heating systems according to claim 1, it is characterised in that the highest heat exchanger is changed for jacket type
Hot device, the jacketed type exchanger is located at the case surface of the gas-solids contact apparatus.
12. gas heating systems according to claim 1, it is characterised in that the heat-exchange system includes three-level heat exchanger,
The three-level heat exchanger is respectively：First order heat exchanger, intergrade heat exchanger, highest heat exchanger.
13. gas heating systems according to claim 12, it is characterised in that the highest heat exchanger and the centre
The ratio between thermic load of level heat exchanger is 0.2:1 to 0.8:1, the temperature rise of the highest heat exchanger hot gas is less than or equal to 100
℃。
14. gas heating systems according to claim 1, it is characterised in that the heating agent includes：Liquid heat medium, gas
Heating agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621133993.0U CN206208058U (en) | 2016-10-18 | 2016-10-18 | Gas heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621133993.0U CN206208058U (en) | 2016-10-18 | 2016-10-18 | Gas heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206208058U true CN206208058U (en) | 2017-05-31 |
Family
ID=58757061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621133993.0U Withdrawn - After Issue CN206208058U (en) | 2016-10-18 | 2016-10-18 | Gas heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206208058U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403639A (en) * | 2016-10-18 | 2017-02-15 | 原初科技（北京）有限公司 | Gas heating system |
| CN108980955A (en) * | 2018-05-23 | 2018-12-11 | 中国科学院上海应用物理研究所 | Matrix management formula solid temperature subregion energy storage method and device |
-
2016
- 2016-10-18 CN CN201621133993.0U patent/CN206208058U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403639A (en) * | 2016-10-18 | 2017-02-15 | 原初科技（北京）有限公司 | Gas heating system |
| CN108980955A (en) * | 2018-05-23 | 2018-12-11 | 中国科学院上海应用物理研究所 | Matrix management formula solid temperature subregion energy storage method and device |
| CN108980955B (en) * | 2018-05-23 | 2020-05-15 | 中国科学院上海应用物理研究所 | Matrix management type solid temperature partition energy storage method and device |
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Granted publication date: 20170531 Effective date of abandoning: 20181002 |