CN104359304B - Combined steam decompression cycles multilevel drying system - Google Patents
Combined steam decompression cycles multilevel drying system Download PDFInfo
- Publication number
- CN104359304B CN104359304B CN201410585506.3A CN201410585506A CN104359304B CN 104359304 B CN104359304 B CN 104359304B CN 201410585506 A CN201410585506 A CN 201410585506A CN 104359304 B CN104359304 B CN 104359304B
- Authority
- CN
- China
- Prior art keywords
- steam
- pressure
- drying
- air
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001035 drying Methods 0.000 title claims abstract description 150
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 14
- 229920002456 HOTAIR Polymers 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000001105 regulatory Effects 0.000 abstract description 4
- 238000011030 bottleneck Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- 238000006297 dehydration reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Abstract
The invention provides a kind of combined steam decompression cycles multilevel drying system, including steam boiler, steam air heat exchanger, water pump and at least secondary superheater steam drying pressure container, every grade of superheat steam drying pressure vessel is equipped with independent steam pipe oven and pressure-regulating valve, dry being operated in superheat steam drying pressure vessel of system is carried out, by regulating pressure-regulating valves at different levels, the tail steam pressure allowing superheat steam drying container at different levels discharge reduces pressure successively, prime steam pressure is higher than rear class, high-temperature medium is made to be circulated work, overcome the technical bottleneck using engine driven supercharging to exist, superheat steam drying is made really to obtain actual application.Even for the large-scale multilevel drying system of the present invention, small pressure steam boiler the most only need to be configured.Additionally use progression to regulate real output and the yield of drying system also by control superheat steam drying, make drying system production capacity match with being dried raw material supply.
Description
Technical field
The present invention relates to a kind of drying system, a kind of combined multi-stage drying system using steam, superheated steam, hot blast that water-containing material is dehydrated.
Background technology
Superheat steam drying refers to utilize superheated steam directly to remove a kind of drying mode of moisture removal in dried object contact, due to its have energy-efficient, environmental protection, dry after the advantages such as good product quality, safety are good it is considered to be the most potential drying mode in this century.The most energy-efficient is superheat steam drying significant advantage the most, and its energy consumption is usually the 1/3～1/5 of conventional hot blast drying machine.But superheat steam drying reaches above-mentioned energy-saving effect and is conditional on, its drying system must is fulfilled for following condition: 1, the high temperature saturated vapor tail vapour rich in latent heat, sensible heat that system is discharged must recycle.2, there is the tail vapour utilization ways more balanced.3, system must be airtight, it is impossible to has on-condensible gas to be mixed into.
In tail vapour utilization ways can be system, it is also possible to be outside system.Obviously outside system, limiting device is promoted the use of scope by heat supply.If utilizing whole tail vapour in system, system is the most multistage, the saturated vapor tail vapour i.e. prime exsiccator discharged reheats and reaches to set to subordinate's exsiccator heat supply after the degree of superheat, or high temperature saturated vapor tail vapour prime discharged reclaims after condensing heat-exchange to subordinate's heat supply.Owing to pipe resistance, steam superheating heating and subordinate's exsiccator operating pressure drop equal pressure loss can be there is when prime is to subordinate's conveying steam, thus prime exsiccator steam output pressure have to be larger than subordinate, system could normal circulation work, and pressure height is conducive to improving drying efficiency in there are some researches show system, after therefore typically requiring the tail steam pressurization that prime is discharged by the engine driven supercharging equipment such as centrifugal high pressure fan or both vapor compression pump of use, flow to subordinate again.
But, high-temperature steam uses the pressurization of engine driven supercharging equipment to there are following insoluble technological difficulties: owing to superheat steam drying has " inversion point " temperature and the highest feature of the biggest drying efficiency of the degree of superheat, so the superheat steam temperature that drying system uses is higher, the temperature of the saturated vapor tail vapour that system is discharged generally individually reaches 120～200 C, the highest.The highest medium temperature causes engine driven supercharging lectotype selection difficulty or makes equipment manufacturing cost costliness be unfavorable for promoting.Additionally there is negative pressure in engine driven supercharging, and system is easily leaked gas and is mixed into on-condensible gas, makes drying efficiency decline.
Summary of the invention
It is an object of the invention to provide a kind of combined steam decompression cycles multilevel drying system, superheat steam drying in system uses pressure vessel, by regulating each grade pressure vessels steam discharge pressure, the tail steam pressure allowing superheat steam drying discharge reduces pressure successively to rear class, steam forepressure is higher than rear class, make high-temperature medium be circulated work, overcome the technical bottleneck using engine driven supercharging to exist, make superheat steam drying really obtain actual application.Due in raw material drying machine in pressure vessel by superheated vapour thermal dehydration, its dehydrating amount approximates steam supply amount, the saturated vapor amount that i.e. superheat steam drying device is discharged can double, and this drying system uses the form that cycle multistage is dried, steam boiler has only to provide saturated steam into first order steam pipe oven, the saturated steam tail vapour that superheat steam drying pressure vessels the most at different levels provide to rear stage steam pipe oven can double, therefore, even for large-scale multilevel drying system, small pressure steam boiler the most only need to be configured.
Additionally drying system rated output power is typically by the dried object raw material supply maximum design of project demonstration, during actual production is managed, raw material supply is often affected by season, weather or market factors etc., peak valley phenomenon occurs, the system production capacity of making is not mated, increase energy consumption and material loss, upset production and operation rhythm, affect manpower management and Product Marketing.The saturated vapor relatively upper level discharged due to this drying system subordinate superheat steam drying pressure vessel is multiplied, therefore the treating capacity that subordinate is dried is multiplied the most accordingly, i.e. increase superheat steam drying progression, the input energy of drying system and yield increase the most accordingly, and the contrary input energy reducing superheat steam drying progression then drying system and yield reduce accordingly.Therefore progression can be used to regulate real output and the yield of drying system by controlling superheat steam drying device, make drying system production capacity match with raw material supply.
The concrete technical scheme of the present invention is:
A kind of combined steam decompression cycles multilevel drying system, it is characterized in that: include steam boiler, steam-air heat exchanger, water pump and at least secondary superheater steam drying pressure container, every grade of superheat steam drying pressure vessel is equipped with independent steam pipe oven and pressure-regulating valve, dry being operated in superheat steam drying pressure vessel of system is carried out, steam boiler is connected with first order steam pipe oven by pressure-regulating valve and provides it saturated steam, first order steam pipe oven is connected with first order superheat steam drying pressure vessel and provides it superheated steam；First order superheat steam drying pressure vessel is connected with second level steam pipe oven by first order pressure-regulating valve and provides it saturated steam, second level steam pipe oven is connected with second level superheat steam drying pressure vessel and provides it superheated steam, superheat steam drying pressure vessels the most at different levels are identical with the connected mode of front two-stage with the connected mode of its prime, making the steam pressure of superheat steam drying pressure vessel at different levels reduce step by step by regulating pressure-regulating valves at different levels, prime steam pressure is more than rear class steam pressure；Final stage superheat steam drying pressure vessel is connected by last stage pressure regulation valve with the steam channel entrance of steam-air heat exchanger and provides it saturated vapor, the steam channel outlet of steam-air heat exchanger is connected with water pump and provides it the low-temperature water heating of condensation, the air channel inlet of steam-air heat exchanger accepts air at room temperature, outlet is provided out hot-air, water delivery side of pump divides two-way, one tunnel is connected to steam boiler and supplies water to it, supplies surplus hot water outside another road direction.
In order to the superheat steam drying pressure vessel progression enabled coming into operation is controlled, further, in described system, the pressure-regulating valve rear of every grade of superheat steam drying pressure vessel further respectively has a stop valve, and it is equipped with a bypass conduit on the connecting line between every stage pressure regulation valve and the stop valve before final stage superheat steam drying pressure vessel, each bypass conduit all collects the steam channel entrance being connected to steam-air heat exchanger, each bypass conduit is additionally provided with and bypasses stop valve accordingly.
In order to make drying system can adapt to various dried object, native system can be the most combined with other different types of exsiccators according to the characteristic and water content being dried raw material, and coordinate other auxiliary equipments, form a more perfect drying system, to reach maximum energy-saving efficiency and broader range.
The invention have the benefit that
The multilevel drying system of the present invention is dried by dried object being put in superheat steam drying pressure vessel, and regulate pressure-regulating valve at different levels, the tail steam pressure allowing superheat steam drying container at different levels discharge reduces pressure successively, prime steam pressure is higher than rear class, high-temperature medium is made to be circulated work, overcome the technical bottleneck using engine driven supercharging to exist, make superheat steam drying really obtain actual application.Even for large-scale multilevel drying system, the most only need to configure the startup of small pressure steam boiler, the most beneficially system, energy consumption can be reduced again, reduce the investment of system, simultaneously facilitate safety management.Additionally use progression to regulate real output and the yield of drying system also by control superheat steam drying, make drying system production capacity match with being dried raw material supply.
Superheat steam drying invention has one-hundred-year history so far, until the later stage seventies in last century developed country just obtains actual application in smaller range, and China is so far still in development.Trace it to its cause and be primarily due to the utilization ways of tail steam and steam endless form does not obtain relatively reasonable perfect solution.The present invention well solves above-mentioned technical barrier, for superheat steam drying in China, particularly obtains actual application at medium-sized and small enterprises and provides one and meet national conditions, practicable technology.Owing to this drying system can select different types of exsiccator existing, technology maturation to be combined according to the characteristic and water content being dried raw material flexibly, therefore, in addition to minority thermal sensitivity raw material, this drying system can be applied in the drying unit of most industries.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of combined steam decompression cycles three-stage drying system.
Fig. 2 is the schematic diagram that can control to use the combined steam decompression cycles three-stage drying system of progression.
Fig. 3 is the schematic diagram that combined steam decompression cycles secondary drying system is used in combination with other exsiccators.
Fig. 4 is the schematic diagram that combined steam decompression cycles three-stage drying system is used in combination with other exsiccators.
nullIn figure: 1-steam boiler，2.1-first order steam pipe oven，2.2-second level steam pipe oven，2.3-third level steam pipe oven，3.1-first order superheat steam drying pressure vessel，3.2-second level superheat steam drying pressure vessel，3.3-third level superheat steam drying pressure vessel，4-steam-air heat exchanger，5-water pump，6-preheated air convection stoving machine，7.1-first order pressure seals charger，7.2-second level pressure seals charger，7.3-third level pressure seals charger，8.1-first order pressure sealed discharging machine，8.2-second level pressure sealed discharging machine，8.3-third level pressure sealed discharging machine，9.1-first order countercurrent drier，9.2-second level countercurrent drier，9.3-third level countercurrent drier，10-air convection drying machine，11-centrifugal blower，11.1-the first air-introduced machine，11.2-the second air-introduced machine，12-air stove，13-Venturi feeder，14-whirlwind air drier，15-solid-gas cyclone separator，16-hot-tub.
FT-pressure-regulating valve, FT1-first order pressure-regulating valve, FT2-second level pressure-regulating valve, FT3-third level pressure-regulating valve, K1-first order stop valve, K2-second level stop valve, K3-third level stop valve, F1-first order bypass stop valve, F2-second level bypass stop valve, ST-drain valve.
In figure: solid line represents that steam line, double dot dash line represent that airline, dotted line represent the circuit being dried raw material.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the combined steam decompression cycles three-stage drying system of a present invention, as shown, three-stage drying system includes steam boiler 1, steam-air heat exchanger 4, water pump 5 and three grades of superheat steam drying pressure vessels 3.1, 3.2, 3.3, it is it before every grade of superheat steam drying pressure vessel and is equipped with independent steam pipe oven, every grade of superheat steam drying pressure vessel is equipped with independent steam pipe oven and pressure-regulating valve, dry being operated in superheat steam drying pressure vessel of system is carried out, steam boiler 1 is connected with first order steam pipe oven 2.1 by pressure-regulating valve FT and is provided it 1 part of saturated steam, first order steam pipe oven 2.1 is connected with first order superheat steam drying pressure vessel 3.1 and provides it superheated steam；First order superheat steam drying pressure vessel 3.1 is connected with second level steam pipe oven 2.2 by first order pressure-regulating valve FT1 and is provided it 2 parts of saturated steams, second level steam pipe oven 2.2 is connected with second level superheat steam drying pressure vessel 3.2 and provides it superheated steam, second level superheat steam drying pressure vessel 3.2 is connected with third level steam pipe oven 2.3 by second level pressure-regulating valve FT2 and is provided it 4 parts of saturated steams, by regulating pressure-regulating valve FT1 at different levels, FT2, FT3 makes the steam pressure from first to third level superheat steam drying pressure vessel reduce step by step, prime steam pressure is more than rear class steam pressure；Third level superheat steam drying pressure vessel 3.3 is connected with the steam channel entrance of steam-air heat exchanger 4 by third level pressure-regulating valve FT3 and provides it 8 parts of saturated vapors, the steam channel outlet of steam-air heat exchanger 4 is connected with water pump 5 and provides it the low-temperature water heating of condensation, the air channel inlet of steam-air heat exchanger 4 accepts air at room temperature, outlet is provided out hot-air, the outlet of water pump 5 divides two-way, one tunnel is connected to steam boiler 1 and supplies water to it, supplies surplus hot water outside another road direction.
In order to enable that the progression of the superheat steam drying pressure vessel come into operation is controlled, as shown in Figure 2, on the basis of above-mentioned three-stage drying system, pressure-regulating valve FT1 at three grades of superheat steam drying pressure vessels, FT2, the rear of FT3 is also respectively provided with a stop valve K1, K2, K3, and between first order pressure-regulating valve FT1 and first order stop valve K1, the first bypass conduit and the second bypass conduit it is respectively equipped with on connecting line between second level pressure-regulating valve FT2 and second level stop valve K2, two bypass conduit all collect the steam channel entrance being connected to steam-air heat exchanger 4, the first bypass stop valve F1 and second bypass stop valve F2 is further respectively had in two bypass conduit.When opening stop valve K1, K2, K3, when closing stop valve F1, F2, three grades of superheat steam drying pressure vessel work of system all work, and system is operated at full capacity by rated output power；When closing stop valve K1, K2, K3 and F2, when opening stop valve F1, system only has first order superheat steam drying pressure vessel to work, and system presses 1/7 work of rated output power；When closing stop valve K2, K3, when opening stop valve K1, F1, F2, two-stage superheat steam drying pressure vessel work before system, system presses 3/7 work of rated power.Thus progression can be used to regulate real output and the yield of drying system by controlling superheat steam drying, make drying system production capacity match with raw material supply.
Native system can also be the most combined with other different types of exsiccators according to the characteristic and water content being dried raw material, and coordinates other auxiliary equipments, forms a more perfect drying system to reach maximum energy-saving efficiency and broader range.
Fig. 3 is the embodiment that combined steam decompression cycles secondary drying system is used in combination with other exsiccators.As shown in Figure 3, system includes a set of combined steam decompression cycles secondary drying system containing secondary superheater steam drying pressure container, it is provided with first order countercurrent drier 9.1 in first order superheat steam drying pressure vessel 3.1, and before and after it, it is respectively equipped with first order pressure sealing charger 7.1 and first order pressure sealed discharging machine 8.1, in second level superheat steam drying pressure vessel 3.2, it is provided with second level countercurrent drier 9.2, and before and after it, is respectively equipped with second level pressure sealing charger 7.2 and second level pressure sealed discharging machine 8.2.Additionally native system is also equipped with preheated air convection stoving machine 6, air convection drying machine 10, centrifugal blower 11, wherein the entrance of preheated air convection stoving machine 6 accepts the room temperature raw material being dried, its outlet connects first order pressure and seals charger 7.1, the outlet of first order pressure sealed discharging machine 8.1 connects second level pressure and seals charger 7.2, the outlet of second level pressure sealed discharging machine 8.2 connects air convection drying machine 10, and dried object finished product is exported by the outlet of air convection drying machine 10；The air channel outlet of steam-air heat exchanger 4 connects centrifugal blower 11, fan outlet divides two-way to be respectively connecting to preheated air convection stoving machine 6 and air convection drying machine 10 provides hot-air for it, and the pipeline that the steam channel outlet of steam-air heat exchanger 4 is connected with water pump 5 is additionally provided with drain valve ST.
When Fig. 3 system uses, the saturated vapor of the ＞ 100 DEG C that steam boiler 1 produces is transported to first order steam pipe oven 2.1 by pressure-regulating valve FT, saturated vapor is heated into the superheated vapour of ＞ 110 DEG C by equipressure, makes water vapour have dehydration characteristic.nullSuperheated vapour is transported to first order superheated steam pressure vessel 3.1，Raw material in built-in first order countercurrent drier 9.1 is dried dehydration，Superheated vapour and raw material carry out energy exchange temperature decline，Form the saturated vapor of ＞ 90 DEG C together with the moisture content of raw material abjection and adjust steam valve FT1 discharge from first order pressure，Saturated vapor is transported to second level steam pipe oven 2.2 and is heated into the superheated vapour of ＞ 110 DEG C by equipressure，Superheated vapour is transported to second level superheated steam pressure vessel 3.2，Raw material in built-in second level countercurrent drier 9.2 is dried dehydration，Superheated vapour and raw material carry out energy exchange temperature decline，Form the saturated vapor of ＞ 90 DEG C together with the moisture content of raw material abjection and adjust steam valve FT2 discharge from second level pressure，Saturated vapor enters steam-air heat exchanger 4，Energy exchange is carried out in steam-air heat exchanger 4，Saturated vapor condensation becomes the hot water of temperature ＜ 60 DEG C and returns to steam boiler 1 composition circulation through drain valve ST and water pump 5.Run into high temperature additionally, due to room temperature raw material and can produce substantial amounts of condensation water, cause dehydration intensity big, energy consumption is high, therefore before room temperature raw material enters first order superheated steam pressure vessel 3.1, must first go through preheated air convection stoving machine 6 to preheat and primary dewatering, the temperature making raw material brings up to more than the dew point of ＞ 60 DEG C, to reduce energy consumption.Raw material seals charger 7.1, first order countercurrent drier 9.1 and first order pressure sealed discharging machine 8.1 by first order pressure and passes in and out first order superheated steam pressure vessel 3.1, obtain second dehydration raw material, then seal charger 7.2, second level countercurrent drier 9.2 and second level pressure sealed discharging machine 8.2 by second level pressure and pass in and out second level superheated steam pressure vessel 3.2, obtaining triple dewatering raw material, triple dewatering raw material obtains finished product through being further dried of air convection drying machine 10 again.Through steam-air heat exchanger 4 heat exchange, the raising of air at room temperature temperature is heated to form 90 DEG C of hot-airs of ＞, and by centrifugal blower 11, major part hot blast is transported to air convection drying machine 10, finally it is dried through triple dewatering raw material, raw material is made to reach finished product water content, fraction hot blast is transported to preheated air convection stoving machine 6, room temperature raw material is carried out heat temperature raising and deviates from portion of water.
Fig. 4 is another embodiment that combined steam decompression cycles three-stage drying system is used in combination with other exsiccators.nullAs shown in Figure 4，System includes a set of combined steam decompression cycles three-stage drying system containing three grades of superheat steam drying pressure vessels，It is provided with first order countercurrent drier 9.1 in first order superheat steam drying pressure vessel 3.1，And before and after it, it is respectively equipped with first order pressure sealing charger 7.1 and first order pressure sealed discharging machine 8.1，It is provided with second level countercurrent drier 9.2 in second level superheat steam drying pressure vessel 3.2，And before and after it, it is respectively equipped with second level pressure sealing charger 7.2 and second level pressure sealed discharging machine 8.2，It is provided with third level countercurrent drier 9.3 in third level superheat steam drying pressure vessel 3.3，And before and after it, it is respectively equipped with third level pressure sealing charger 7.3 and third level pressure sealed discharging machine 8.3，Wherein countercurrent drier 9.1、9.2、9.3 use convection current band drier，Pressure seals charger 7.1、7.2、7.3 use pressure sealing screw charger，Pressure sealed discharging machine 8.1、8.2、8.3 use pressure sealing screw discharging machine.nullAdditionally native system is also equipped with preheated air convection stoving machine 6、Air stove 12、First air-introduced machine 11.1、Second air-introduced machine 11.2、Venturi feeder 13、Whirlwind air drier 14、Solid-gas cyclone separator 15、Hot-tub 16，Wherein air stove 12 provides hot blast to preheated air convection stoving machine 6 by the first air-introduced machine 11.1，The entrance of preheated air convection stoving machine 6 accepts the room temperature raw material being dried，Its outlet connects first order pressure and seals charger 7.1，The outlet of first order pressure sealed discharging machine 8.1 connects second level pressure and seals charger 7.2，The outlet of second level pressure sealed discharging machine 8.2 connects third level pressure and seals charger 7.3，The outlet of third level pressure sealed discharging machine 8.3 connects the feeding mouth of Venturi feeder 13，The discharging pipeline of Venturi feeder 13 connects the entrance of whirlwind air drier 14，The outlet of whirlwind air drier 14 connects solid-gas cyclone separator 15，Dried object finished product is exported by the outlet of solid-gas cyclone separator 15；The air channel outlet of steam-air heat exchanger 4 divides two-way, one tunnel connects the second air-introduced machine 11.2, second air-introduced machine 11.2 outlet connects Venturi feeder 13 air outlet and provides hot-air by the discharge nozzle road direction whirlwind air drier 14 of Venturi feeder 13, and another road is connected to the entrance of the first air-introduced machine 11.1；The steam channel outlet of steam-air heat exchanger 4 connects hot-tub 16, and hot-tub 16 is supplied water to steam boiler 1 by water pump.
Fig. 4 system is mainly used in being dried High water cut distillers grains and dregs raw material, and its basic procedure being dried is similar with Fig. 3 system, and the progression being simply dried increased, and employs corresponding auxiliary equipment.Time the startup stage that native system being in, thered is provided more than 80 C hot blasts by air stove 12 to preheated air convection stoving machine 6, after system run all right, hot blast needed for preheated air convection stoving machine 6 is separated part hot-air by steam-air heat exchanger 4 and supplies, and now air stove 12 quits work or as auxiliary hot air source.Send into whirlwind air drier 14 for the raw material that four times are dehydrated by Venturi feeder 13 carry out last the 5th time dehydrate through preheating and drying and three grades of superheat steam dryings, the hot blast of whirlwind air drier 14 is provided by steam-air heat exchanger, raw material after five dehydrate is delivered to discharge after solid-gas cyclone separator 15 separates with wet waste gas, is finished product.
Following table is that the combined steam decompression cycles multilevel drying system shown in Fig. 4 does not reclaim superheat steam drying system carry out one group of correction data of thermodynamic computing with common hot blast and discharge steam.
In table, data are energy (unit: KJ) needed for evaporation 1kg water
From the contrast of upper table it can be seen that the observable index traditional heated air drying of combined steam decompression cycles multilevel drying system reduces about 70%, energy-saving effect is huge.
Claims (5)
1. a combined steam decompression cycles multilevel drying system, it is characterized in that: include steam boiler (1), steam-air heat exchanger (4), water pump (5) and at least secondary superheater steam drying pressure container, every grade of superheat steam drying pressure vessel is equipped with independent steam pipe oven and pressure-regulating valve, dry being operated in superheat steam drying pressure vessel of system is carried out, steam boiler (1) is connected by pressure-regulating valve (FT) with first order steam pipe oven (2.1) and provides it saturated steam, first order steam pipe oven (2.1) is connected with first order superheat steam drying pressure vessel (3.1) and provides it superheated steam；First order superheat steam drying pressure vessel (3.1) is connected by first order pressure-regulating valve (FT1) with second level steam pipe oven (2.2) and provides it saturated steam, second level steam pipe oven (2.2) is connected with second level superheat steam drying pressure vessel (3.2) and provides it superheated steam, superheat steam drying pressure vessels the most at different levels are identical with the connected mode of front two-stage with the connected mode of its prime, the steam pressure of superheat steam drying pressure vessel at different levels is made to reduce step by step by adjusting pressure-regulating valves at different levels, prime steam pressure is more than rear class steam pressure；Final stage superheat steam drying pressure vessel is connected by last stage pressure regulation valve with the steam channel entrance of steam-air heat exchanger (4) and provides it saturated vapor, the steam channel outlet of steam-air heat exchanger (4) is connected with water pump (5) and provides it the low-temperature water heating of condensation, the air channel inlet of steam-air heat exchanger (4) accepts air at room temperature, outlet is provided out hot-air, the outlet of water pump (5) divides two-way, one tunnel is connected to steam boiler (1) and supplies water to it, supplies surplus hot water outside another road direction.
Multilevel drying system the most according to claim 1, it is characterized in that: in described system, the pressure-regulating valve rear of every grade of superheat steam drying pressure vessel further respectively has a stop valve, and it is equipped with a bypass conduit on the connecting line between every stage pressure regulation valve and the stop valve before final stage superheat steam drying pressure vessel, each bypass conduit all collects the steam channel entrance being connected to steam-air heat exchanger (4), each bypass conduit is additionally provided with and bypasses stop valve accordingly.
Drying system the most according to claim 2, it is characterized in that: described system contains secondary superheater steam drying pressure container, first order countercurrent drier (9.1) it is provided with in first order superheat steam drying pressure vessel (3.1), and before and after it, it is respectively equipped with first order pressure sealing charger (7.1) and first order pressure sealed discharging machine (8.1), second level countercurrent drier (9.2) it is provided with in second level superheat steam drying pressure vessel (3.2), and before and after it, it is respectively equipped with second level pressure sealing charger (7.2) and second level pressure sealed discharging machine (8.2)；Additionally native system is also equipped with preheated air convection stoving machine (6), air convection drying machine (10), centrifugal blower (11), wherein the entrance of preheated air convection stoving machine (6) is accepted and is dried room temperature raw material, its outlet connects first order pressure and seals charger (7.1), the outlet of first order pressure sealed discharging machine (8.1) connects second level pressure and seals charger (7.2), the outlet of second level pressure sealed discharging machine (8.2) connects air convection drying machine (10), and dried object finished product is exported by the outlet of air convection drying machine (10)；The air channel outlet of steam-air heat exchanger (4) connects centrifugal blower (11), fan outlet divides two-way to be respectively connecting to preheated air convection stoving machine (6) and air convection drying machine (10) provides hot-air for it, and the pipeline that the steam channel outlet of steam-air heat exchanger (4) is connected with water pump (5) is additionally provided with drain valve (ST).
nullDrying system the most according to claim 2，It is characterized in that: described system contains three grades of superheat steam drying pressure vessels，First order countercurrent drier (9.1) it is provided with in first order superheat steam drying pressure vessel (3.1)，And before and after it, it is respectively equipped with first order pressure sealing charger (7.1) and first order pressure sealed discharging machine (8.1)，Second level countercurrent drier (9.2) it is provided with in second level superheat steam drying pressure vessel (3.2)，And before and after it, it is respectively equipped with second level pressure sealing charger (7.2) and second level pressure sealed discharging machine (8.2)，Third level countercurrent drier (9.3) it is provided with in third level superheat steam drying pressure vessel (3.3)，And before and after it, it is respectively equipped with third level pressure sealing charger (7.3) and third level pressure sealed discharging machine (8.3)；nullAdditionally native system is also equipped with preheated air convection stoving machine (6)、Air stove (12)、First air-introduced machine (11.1)、Second air-introduced machine (11.2)、Venturi feeder (13)、Whirlwind air drier (14)、Solid-gas cyclone separator (15)、Hot-tub (16)，Wherein air stove (12) provides hot blast to preheated air convection stoving machine (6) by the first air-introduced machine (11.1)，The entrance of preheated air convection stoving machine (6) accepts the room temperature raw material being dried，Its outlet connects first order pressure and seals charger (7.1)，The outlet of first order pressure sealed discharging machine (8.1) connects second level pressure and seals charger (7.2)，The outlet of second level pressure sealed discharging machine (8.2) connects third level pressure and seals charger (7.3)，The outlet of third level pressure sealed discharging machine (8.3) connects the feeding mouth of Venturi feeder (13)，The discharging pipeline of Venturi feeder (13) connects the entrance of whirlwind air drier (14)，The outlet of whirlwind air drier (14) connects solid-gas cyclone separator (15)，Dried object finished product is exported by the outlet of solid-gas cyclone separator (15)；The air channel outlet of steam-air heat exchanger (4) divides two-way, one tunnel connects the second air-introduced machine (11.2), second air-introduced machine (11.2) outlet connects Venturi feeder (13) air outlet and provides hot-air by discharge nozzle road direction whirlwind air drier (14) of Venturi feeder (13), and another road is connected to the entrance of the first air-introduced machine (11.1)；The steam channel outlet of steam-air heat exchanger (4) connects hot-tub (16), and hot-tub (16) is supplied water to steam boiler (1) by water pump.
Drying system the most according to claim 4, it is characterized in that: described countercurrent drier (9.1,9.2,9.3) uses convection current band drier, pressure seals charger (7.1,7.2,7.3) and uses pressure sealing screw charger, and pressure sealed discharging machine (8.1,8.2,8.3) uses pressure sealing screw discharging machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410585506.3A CN104359304B (en) | 2014-10-28 | 2014-10-28 | Combined steam decompression cycles multilevel drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410585506.3A CN104359304B (en) | 2014-10-28 | 2014-10-28 | Combined steam decompression cycles multilevel drying system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104359304A CN104359304A (en) | 2015-02-18 |
| CN104359304B true CN104359304B (en) | 2016-08-24 |
Family
ID=52526590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410585506.3A Active CN104359304B (en) | 2014-10-28 | 2014-10-28 | Combined steam decompression cycles multilevel drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104359304B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588161A (en) * | 2016-02-16 | 2016-05-18 | 广州宝狮无线供电技术有限公司 | Heat supply system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601113A (en) * | 1985-04-26 | 1986-07-22 | Westinghouse Electric Corp. | Method and apparatus for fluidized steam drying of low-rank coals |
| JP4987428B2 (en) * | 2006-11-06 | 2012-07-25 | 住友大阪セメント株式会社 | High moisture content organic waste treatment method and treatment equipment |
| CN101519707B (en) * | 2008-02-28 | 2010-12-01 | 宝山钢铁股份有限公司 | Process and multistage fluidized bed for hematite prereduction |
| CN101769669A (en) * | 2009-01-05 | 2010-07-07 | 黄龙 | Reusable supercharging superheat steam drying method and device |
| CN101776373A (en) * | 2009-01-09 | 2010-07-14 | 黄龙 | Pressurizing superheat steam drying method and device with inner heater and capable of being reused |
| CN101581532B (en) * | 2009-06-04 | 2010-11-10 | 山东天力干燥设备有限公司 | Multi-effect system and process for pre-drying lignite through overheated steam |
| CN101776371B (en) * | 2010-01-06 | 2012-07-11 | 兰州瑞德干燥技术有限公司 | Superheated steam rotary drying and steam tail gas indirect rotary drying method for lignite |
| CN102276131B (en) * | 2011-06-30 | 2013-06-26 | 杭州电子科技大学 | Secondary steam compressed drying method of sludge |
| CN102410705A (en) * | 2011-11-22 | 2012-04-11 | 北京神雾环境能源科技集团股份有限公司 | Multistage continuous overheated steam drying system and method of low-rank coal |
| CN204165372U (en) * | 2014-10-28 | 2015-02-18 | 何宁川 | Combined steam decompression cycles multilevel drying system |
-
2014
- 2014-10-28 CN CN201410585506.3A patent/CN104359304B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104359304A (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106643107B (en) | A kind of heat-pump-type Two-way Cycle hot air drying system control method and its control device | |
| CN106766837B (en) | A kind of frequency conversion capability-variable heat pump hot air drying system control method and its control device | |
| CN102294124B (en) | Spray drying method and device based on absorption heat pipe | |
| CN104034126B (en) | A kind of superheat steam drying system and technique | |
| CN103575081A (en) | Fermented feed drying method | |
| CN103822454B (en) | Based on wet dregs of rice drying system and the drying process of mechanical steam recompression | |
| CN204165372U (en) | Combined steam decompression cycles multilevel drying system | |
| CN103575082A (en) | Fermented feed drying system | |
| CN104359304B (en) | Combined steam decompression cycles multilevel drying system | |
| CN203586725U (en) | Fermented forage drying device | |
| CN206207966U (en) | Water circulation type function of mechanical steam recompression MVR drying systems | |
| CN206330409U (en) | A kind of frequency conversion capability-variable heat pump hot air drying system | |
| CN207540327U (en) | One kind is provided multiple forms of energy to complement each other wind and water combined drying device | |
| CN203893630U (en) | Solar-energy-and-heat-pump-combined moulded coal drying system | |
| CN209893904U (en) | Lignite drying and water collecting system based on steam recompression technology | |
| CN207850110U (en) | A kind of steam condensate recovering device | |
| CN203096291U (en) | Hierarchical heat exchanging water draining and water-air sensible heat gradient utilization constant humidity type relaxation heat setting machine | |
| CN105524677B (en) | A kind of lignite vacuum drying upgrading device and Upgrading method of brown coals | |
| CN204569884U (en) | A kind of Wort boiling system of reusable edible secondary steam | |
| CN203174268U (en) | Return-air-free relaxation heat-setting machine for flash and sensible heat of condensate water and waste heat recovery of exhaust air | |
| CN203080168U (en) | Constant humidity condensate water hierarchical flash evaporation and low-temperature sensible heat recovery slack heat-setting machine | |
| CN203128763U (en) | Return-air-free condensate-water grading flash and exhaust air waste heat recovery flabby heat-setting machine | |
| CN203096294U (en) | Hierarchical heat exchanging water draining and water sensible heat multistage utilization constant humidity type relaxation heat setting machine | |
| CN203731826U (en) | Wet meal drying system on basis of mechanical steam recompression | |
| CN108722127A (en) | Desulfurization wet flue gas demister system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |