CN106110685A - A kind of waste heat utilizing drying machine is evaporated the system concentrated - Google Patents

Abstract

nullThe present invention relates to the system that a kind of waste heat utilizing drying machine is evaporated concentrating，Including material being sequentially connected in series the first of heating、Two、Three pipe bundle driers，The offgas outlet of each pipe bundle drier is respectively with first、Two、The air inlet of three cyclones connects，First、The air outlet of two cyclones is connected with the air inlet on used heat absorption tower，The air vent at top, used heat absorption tower is connected with the entrance of absorption tower exhaust blower，The inner chamber top on used heat absorption tower is provided with packing layer，Packing layer be arranged over cloth liquid dish，The bottom on used heat absorption tower is provided with water-collecting tray，Discharge outlet bottom water-collecting tray is connected with the centre entrance of used heat flash tank，The used heat flash tank steam (vapor) outlet of used heat flash drum overhead is connected with flash-off steam pipe，Bottom used heat flash tank, the entrance with absorption tower circulating pump is connected，Absorption tower circulation delivery side of pump is connected with the filling pipe of Bu Ye disk center.The present invention utilizes the waste heat of drying machine to be evaporated the system concentrated, and utilization rate of waste heat is high, and concentrated effect is good.

Description

A kind of waste heat utilizing drying machine is evaporated the system concentrated

Technical field

The present invention relates to a kind of residual neat recovering system, be evaporated concentration particularly to a kind of waste heat utilizing drying machine System, belongs to technical field of waste heat utilization.

Background technology

Alcohol Plant produces ethanol and generally uses the raw materials such as Semen Maydis to carry out liquid fermentation, and starch is converted to ethanol and titanium dioxide Carbon, other nutritional labelings such as protein, fat, fiber etc. are all stayed in mash.Simultaneously because the effect of microorganism, egg in mash White matter, vitamin B group and amino acid content all increased than Semen Maydis, and containing the unknown somatomedin generated in fermentation, It it is good albumen feedstuff.

DDGS(Distillers Dried Grains with Solubles), be cleaner liquid is dried after concentration again with Filtering residue combination drying and the feedstuff that obtains.Owing to the protein content of DDGS is more than 26%, it has also become Feed Manufacturing both at home and abroad The wide variety of a kind of novel protein feed raw material of enterprise, is commonly used to Substitution for Soybean Meal, fish in poultry and aquatic product matched feedstuff Powder, adding proportion reaches as high as 30%, and can be with Direct-fed ruminant.

Traditional DDGS feed production system is: the mash that Alcohol Plant given up isolates ethanol slag and clear liquid, enters ethanol slag Row is dried.For improving yield, when ethanol slag is dried, multiple stage pipe bundle drier is used to be in parallel, every pipe bundle drier Disposably ethanol slag is dried and reach less than 12% to moisture content, then use the concentrated solution of clear liquid that dried ethanol slag is carried out Add slurry.There is following weak point in such technique: (1) ethanol slag be oven-dried to moisture content less than 12% after, can shape on surface Becoming a shell, now carry out adding slurry, concentrated solution is not easily penetrated into inside ethanol slag, is simply bonded in the surface of ethanol slag, makes Ethanol slag is easy to agglomerating caking, poor product quality.(2) disposably drying ethanol slag and put in place, steam consumption is big, dry Dry efficiency is low, is unfavorable for the cascade utilization of energy.(3) in order to discharge humidity as quickly as possible, the convulsion amount ratio of pipe bundle drier Relatively big, the aperture of new wind air door is the biggest so that the exhaust temperature of pipe bundle drier is low, high containing air capacity, reduces tail gas Quality, be unfavorable for tail gas is carried out heat recovery.

Summary of the invention

It is an object of the invention to, overcome problems of the prior art, it is provided that a kind of waste heat utilizing drying machine enters The system of row evaporation and concentration, utilization rate of waste heat is high, and clear liquid concentrated effect is good.

For solving above technical problem, a kind of waste heat utilizing drying machine of the present invention is evaporated the system concentrated, bag Include and material is sequentially connected in series the first pipe bundle drier of heating, the second pipe bundle drier and the 3rd pipe bundle drier, described first, Two, the offgas outlet at three pipe bundle drier tops air inlet with first, second and third cyclone respectively is connected, and described first and second is husky The air outlet of cron is connected with the absorption tower air inlet in the middle part of used heat absorption tower respectively, the absorption tower at top, described used heat absorption tower Air vent is connected with the entrance of absorption tower exhaust blower, and the inner chamber top on described used heat absorption tower is provided with packing layer, described packing layer Be arranged over cloth liquid dish, the bottom on described used heat absorption tower is provided with water-collecting tray, the discharge outlet bottom described water-collecting tray and used heat Used heat flash tank entrance in the middle part of flash tank is connected, and the used heat flash tank steam (vapor) outlet of described used heat flash drum overhead steams with flash distillation Steam pipe is connected, and the flash tank discharge outlet bottom described used heat flash tank is connected with the entrance of absorption tower circulating pump, described absorption tower Circulation delivery side of pump is connected with the filling pipe of described Bu Ye disk center by absorption tower circulation pipe.

Relative to prior art, the present invention achieves following beneficial effect: 1. use multiple stage tube bank dry with traditional technique Dry machine disposable drying in parallel is compared, and the present invention uses more than three grades drying of connecting.Disposably dry to ensure containing of discharging Water rate meets the requirements, and baked strength is bigger, must use a large amount of new wind to discharge humidity, and steam consumption and power consumption are all Bigger, tail gas poor quality.Before the present invention, the moisture content of two-stage discharging is higher, it is not necessary to the new wind of a large amount of use, tail gas quality better； Although the moisture content ratio of final stage discharging is relatively low, but owing to passing through the prebake of front two-stage, the baked strength of final stage is the most not Needing very big, new emaciation due to emotional upset consumption is also far below traditional handicraft.The system volume drying efficiency of the present invention is high, steam and power consumption Low, it is beneficial to tail gas is carried out respectively waste heat recovery, cascade utilization.2. the front two-stage of the present invention is prebake, the powder in tail gas Dirt is the cleanest less, and the air weight content in tail gas is 30～50%, and temperature is at 90～96 DEG C, and vapour content is high, improves The quality of tube bundle drying machine tail gas, is beneficial to carry out waste heat recovery, enters used heat after the first cyclone, the second cyclone dedusting Heat is reclaimed on absorption tower.3. the present invention carries out, to high-quality tail gas and low quality tail gas, recovery waste heat of classifying, with strong points, waste heat Utilization rate is high.4. the high-quality tail gas that the first pipe bundle drier, the second pipe bundle drier are discharged enters useless from absorption tower air inlet In heat absorption tower, flow upwardly through packing layer, in packing layer, drench, with cloth liquid dish, the recirculated water carry out hot and humid area and washed Washing, waste gas is extracted out by absorption tower exhaust blower, and the recirculated water after temperature raises falls in water-collecting tray, flows into used heat under suction function Flash tank, in used heat flash tank, flash distillation becomes 85 ± 5 DEG C of flash-off steams entrance flash-off steam pipes for later process, used heat Condensed water bottom flash tank is extracted out by absorption tower circulating pump and returns to remove circulated sprinkling in the cloth liquid dish on used heat absorption tower.

As the improvement of the present invention, tube bank condensed water row's mouth of described first, second and third pipe bundle drier is common and condensed water Condensate water pot entrance in the middle part of tank connects, and described condensate water pot top is provided with condensate water pot steam (vapor) outlet, and described condensate water pot steams Vapor outlet is connected with described flash-off steam pipe, and the condensate water pot discharge outlet bottom described condensate water pot connects with the entrance of condensate pump Connecing, described condensed water delivery side of pump is connected with the softening water feed pipe of boiler room.The steam that the tube bank of each pipe bundle drier is discharged is cold Solidifying water is the cleanest, after condensed water pot flash distillation produce flash-off steam also into flash-off steam pipe for later process, residual The remaining condensed water water pump that is condensed is extracted out and is sent to boiler room, can be directly as boiler replenishing water.

As a further improvement on the present invention, the scrubbing tower in the middle part of the air outlet of described 3rd cyclone and exhaust gas washing tower Air inlet connects, and the inner chamber top of described exhaust gas washing tower is provided with shower, and described shower sprays delivery side of pump with scrubbing tower Being connected, the entrance of described scrubbing tower spray pump is connected with spray tank, the exhaust gas washing tower draining bottom described exhaust gas washing tower Mouth is directed at described spray tank；The exhaust gas washing tower air vent at described exhaust gas washing tower top imitates heat exchanger shell pass top with used heat Used heat effect heat exchanger air inlet be connected, used heat effect heat exchanger air vent and the used heat of described used heat effect heat exchanger shell pass bottom are imitated The entrance of exhaust blower is connected；At the used heat effect heat exchanger dirt condensate discharge mouth of described used heat effect heat exchanger shell pass bottom and sewage Reason station is connected；The feed separation mouth of described used heat effect heat exchanger bottom was connected with used heat effect separator by communicating pipe, described useless The top of thermal effect separator is provided with used heat effect separator air vent, the used heat effect heat exchanger material of described used heat effect exchanger base Export the entrance jointly with used heat effect circulating pump of the used heat effect separator material outlet with described used heat effect separator bottom to be connected, The entrance of described used heat effect circulating pump is also connected with an outlet imitating material outlet tube；Described used heat effect circulation delivery side of pump and institute The used heat effect heat exchanger material inlet stating used heat effect heat exchanger connects, and described used heat effect circulation delivery side of pump imitates thing also by used heat Material outlet tube is connected with the entrance of concentrated solution holding vessel；The described bottom of concentrated solution holding vessel is connected with the entrance of screw pump, institute State screw rod delivery side of pump to be connected with total concentrated solution pipe.What the 3rd pipe bundle drier was discharged is low quality tail gas, and dust content is high, temperature Degree is at 75～90 DEG C, and air weight content is 60～70%, and the low quality tail gas that the 3rd pipe bundle drier is discharged is through the 3rd picogram After dragon dedusting, enter the scrubbing tower air inlet in the middle part of exhaust gas washing tower, during flowing up, by following that shower sprays Ring water washs, and washings fall in spray tank, is washed the extraction of tower spray pump and is sent to shower circulated sprinkling.Tail after washing The gas exhaust gas washing tower air vent from exhaust gas washing tower top is discharged, and under the suction of used heat effect exhaust blower, low quality tail gas enters Enter the used heat effect heat exchanger air inlet at used heat effect heat exchanger shell pass top, during flowing downward, the used heat of tube side is imitated dense Contracting liquid heats, the dirty condensed fluid discharged from the used heat effect heat exchanger dirt condensate discharge mouth of used heat effect heat exchanger shell pass bottom Enter after Sewage Disposal processes and discharge.The used heat effect concentrated solution of used heat effect exchanger base, used heat imitate the useless of separator bottom Thermal effect concentrated solution and the effect concentrated solution come from an effect material outlet tube are extracted out by used heat effect circulating pump jointly, are sent to used heat effect and change Hot device material inlet is circulated heating, and used heat after heating effect concentrated solution is carried out used heat effect separator point from entering communicating pipe From, moisture evaporation becomes the used heat effect steam of 65 ± 5 DEG C and discharges from used heat effect separator air vent, and the used heat effect after concentration concentrates Liquid enters used heat effect circulating pump circulation from used heat effect separator material outlet, and the used heat effect of part used heat effect circulating-pump outlet concentrates Liquid is discharged from used heat effect material outlet tube, enters concentrated solution holding vessel and stores, and is extracted out by screw pump and sends into total concentrated solution pipe for the Two pipe bundle driers and the 3rd pipe bundle drier add slurry use, in concentrated solution holding vessel the weight concentration of concentrated solution be 31%～ 35%。

As a further improvement on the present invention, the outlet of described flash-off steam pipe and an effect imitating heat exchanger shell pass top Heat exchanger air inlet is connected, and an effect heat exchanger air vent of a described effect heat exchanger shell pass bottom is connected with the house steward that bleeds；Described The feed separation mouth of one effect heat exchanger bottom was connected with an effect separator by communicating pipe, and the top of a described effect separator is provided with One effect separator air vent, an effect heat exchanger material outlet of a described effect exchanger base and a described effect separator bottom One effect separator material outlet is connected with an entrance imitating circulating pump jointly, and the entrance of a described effect circulating pump also imitates materials with two The outlet of outlet tube is connected；A described effect circulation delivery side of pump imitates heat exchanger material inlet even with the one of a described effect heat exchanger Connecing, a described effect circulation delivery side of pump is also connected with a described effect material outlet tube.Under the swabbing action of house steward of bleeding, used heat 85 ± 5 DEG C of flash-off steams that flash tank and condensate water pot flash off enter an effect heat exchanger shell pass top from flash-off steam pipe One effect heat exchanger air inlet, heats an effect concentrated solution of tube side, an effect exchanger base during flowing downward One effect concentrated solution, one effect separator bottom one effect concentrated solution and from two effect material outlet tubes come two effect concentrated solution quilts jointly One effect circulating pump is extracted out, is sent to an effect heat exchanger material inlet and is circulated heating, and the effect concentrated solution after heating is from communicating pipe Entering in an effect separator and separate, moisture evaporation becomes the two effect steam of 72 ± 5 DEG C and discharges from an effect separator air vent, An effect concentrated solution after concentration enters an effect circulating pump circulation from an effect separator material outlet, and part one imitates circulating-pump outlet One effect concentrated solution discharges the entrance conveying to used heat effect circulating pump from an effect material outlet tube, enters next stage and concentrates, an effect thing In material outlet tube 17g, the weight concentration of concentrated solution is 25%～27%.The highest flash-off steam of temperature with concentrate through three grades One effect concentrated solution carries out heat exchange, it is ensured that concentrated effect.

As a further improvement on the present invention, a described effect separator air vent and two effects at two effect heat exchanger shell pass tops Heat exchanger air inlet is connected, the effect heat exchanger condensate drain outlet bottom a described effect heat exchanger shell pass and described two effect heat exchange Two effect heat exchanger condensing water inlets in the middle part of device shell side connect, two effect heat exchanger air vents of described two effect heat exchanger shell pass bottoms It is connected with the described house steward of bleeding；The feed separation mouth of described two effect heat exchanger bottoms was connected with two effect separators by communicating pipe, The top of described two effect separators is provided with two effect separator air vents, and two effect heat exchanger materials of described two effect exchanger base go out Mouth is connected with two entrances imitating circulating pumps jointly with two effect separator material outlets of described two effect separator bottom, and described two imitate The also outlet with triple effect material outlet tube of the entrance of circulating pump is connected；Described two effect circulation delivery side of pump and described two effect heat exchangers Two effect heat exchanger material inlets connect, described two effect circulation delivery side of pump also with described two effect material outlet tubes is connected.Taking out Under the swabbing action of gas house steward, the two effect steam discharged from an effect separator air vent enter the two of two effect heat exchanger shell pass tops Two effect concentrated solutions of tube side are heated during flowing downward, become after two effect steam heat releases by effect heat exchanger air inlet It is that two effect condensed waters continue to flow downward.One discharged from an effect heat exchanger condensate drain outlet of an effect heat exchanger shell pass bottom Effect condensed water enters two effect heat exchanger condensing water inlets in the middle part of two effect heat exchanger shell pass, after mix with two effect condensed waters common to Lower flowing continues two effect concentrated solution heating.Two effect exchanger base two effect concentrated solutions, two effect separator bottom two effect dense Contracting liquid and the triple effect concentrated solution come from triple effect material outlet tube are extracted out by two effect circulating pumps jointly, are sent to two effect heat exchanger materials and enter Mouth is circulated heating, and two effect concentrated solutions after heating separate from communicating pipe entrance two effect separators, and moisture flashes to Be 65 ± 5 DEG C triple effect steam from two effect separator air vents discharge, after concentration two effect concentrated solutions from two effect separator materials Outlet entrance two effect circulating pumps circulation, part two imitates two effect concentrated solutions of circulating-pump outlet from two effect material outlet tubes discharges to one The entrance conveying of effect circulating pump, enters next stage and concentrates, and in two effect material outlet tubes, the weight concentration of concentrated solution is 18%～20%. The two effect steam that temperature is higher carry out heat exchange with the two effect concentrated solutions concentrated through two-stage, and concentrated effect is good.

As a further improvement on the present invention, described two effect separator air vents and the triple effect at three-effect heat exchanger shell side top Heat exchanger air inlet is connected, two effect heat exchanger condensate drain outlets bottom described two effect heat exchanger shell pass and described triple effect heat exchange Three-effect heat exchanger condensing water inlet in the middle part of device shell side connects, the three-effect heat exchanger air vent of described three-effect heat exchanger shell side bottom It is connected with the described house steward of bleeding；The feed separation mouth of described three-effect heat exchanger bottom passes through to be connected with triple effect separator communicating pipe, The top of described triple effect separator is provided with triple effect separator air vent, and the three-effect heat exchanger material bottom described three-effect heat exchanger goes out Mouth is connected with the entrance of triple effect cycle pump jointly with the triple effect separator material outlet of described triple effect separator bottom, and Alcohol Plant gives up The isolated clear liquid of mash is connected with the clear liquid charging aperture of described triple effect separator bottom by clear liquid pipe；Described triple effect cycle pump Outlet be connected with the three-effect heat exchanger material inlet of described three-effect heat exchanger, described triple effect cycle delivery side of pump is also with described three Effect material outlet tube is connected.Under the swabbing action of house steward of bleeding, the triple effect steam discharged from two effect separator air vents enters The three-effect heat exchanger air inlet at three-effect heat exchanger shell side top, is carried out the triple effect concentrated solution of tube side during flowing downward Heating, becomes triple effect condensed water after triple effect steam heat release and continues to flow downward.From two effect heat exchange of two effect heat exchanger shell pass bottoms The two effect condensed waters that device condensate drain outlet is discharged enter the three-effect heat exchanger condensing water inlet in the middle part of three-effect heat exchanger shell side, with Triple effect concentrated solution is heated by the continuation that jointly flows downward after the mixing of triple effect condensed water.Alcohol Plant gives up the weight of the isolated clear liquid of mash Amount concentration is 4.5%～5.5%, and this clear liquid enters the clear liquid charging aperture of triple effect separator bottom by clear liquid pipe, concentrates with triple effect Liquid mixes, and bottom three-effect heat exchanger and the triple effect concentrated solution of triple effect separator bottom is jointly by triple effect cycle pumped, is sent to three Effect heat exchanger material inlet is circulated heating, and the triple effect concentrated solution after heating enters triple effect separator from communicating pipe and carries out point From, moisture evaporation becomes the quadruple effect steam of 50 ± 5 DEG C and discharges from triple effect separator air vent；Triple effect concentrated solution after concentration is from three Effect separator material outlet enters the circulation of triple effect cycle pump, and the triple effect concentrated solution of part triple effect cycle pump discharge is defeated from triple effect material Going out bank of tubes and go out the entrance conveying to two effect circulating pumps, enter next stage and concentrate, in triple effect material outlet tube, the weight of concentrated solution is dense Degree is 11%～13%.The relatively low triple effect steam of temperature carries out heat exchange with the triple effect concentrated solution carrying out primary concentration, and concentrated effect is good.

As a further improvement on the present invention, described triple effect separator air vent is connected with the described house steward of bleeding, described in take out The outlet of gas house steward is connected with the condenser air inlet on condenser shell side top, the condenser exhaust gas of described condenser shell side bottom Mouth is connected with the entrance of vacuum pump；Condenser condensate drain outlet bottom described condenser shell side and the entrance of Condensed water collection tank Connecting, the top of described Condensed water collection tank is connected with the described house steward of bleeding, the bottom of described Condensed water collection tank and solidifying water delivery pump Entrance be connected, described solidifying water conveying delivery side of pump is respectively by filling pipe and the Sewage Disposal of valve and described spray tank Connect；Three-effect heat exchanger condensate drain outlet bottom described three-effect heat exchanger shell side connects with the entrance of described Condensed water collection tank Connect.Under the swabbing action of vacuum pump, an effect heat exchanger air vent, two effect heat exchanger air vents, three-effect heat exchanger air vent row The quadruple effect steam that the incoagulable gas gone out and triple effect separator air vent are discharged all is entered on condenser shell side by the house steward that bleeds The condenser air inlet in portion, cools down, finally from condenser exhaust gas indirectly along shell fluid flow and by the cooling water of tube side from top to bottom Mouth escapes and enter vacuum pump；Cooling water enters from condenser cooling water entrance, from bottom to top along tube side flow, cold from condenser But water out is discharged.The condensed water entrance Condensed water collection tank that the condenser condensate drain outlet of condenser shell side bottom is discharged, three The condensed water that three-effect heat exchanger condensate drain outlet bottom effect heat exchanger shell pass is discharged is also into Condensed water collection tank, Condensed water collection The incoagulable gas of tank top is sucked away by gas house steward.

As a further improvement on the present invention, described one, two, the shell side top of three-effect heat exchanger be respectively equipped with incoagulability gas Body bleeding point, each described incoagulable gas bleeding point is connected with the described house steward of bleeding by auxiliary exhaust valve respectively.System puts into Each auxiliary exhaust valve can be opened before operation, intrasystem incoagulable gas is extracted out, improve one, two, the changing of three-effect heat exchanger The thermal efficiency.

As a further improvement on the present invention, described one, two, be connected to one bottom the shell side of three-effect heat exchanger, two, Triple effect shell side knockout drum, described one, two, three-effect heat exchanger air vent respectively with described one, two, the top of triple effect shell side knockout drum Be connected, described one, two, three-effect heat exchanger condensate drain outlet with described one, two, the bottom of triple effect shell side knockout drum is connected.

As a further improvement on the present invention, described one, two, three-effect heat exchanger and described condenser be many backhauls baffling Shell-and-tube heat exchanger.Steam flowing stroke in heat exchanger shell pass can be extended, by two ends by the separation of deflection plate Tube sheet can realize concentrated solution and carry out diffraction current at tube side, to increase heat-exchange time and the heat exchange area of steam and concentrated solution.

Accompanying drawing explanation

The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings, accompanying drawing only provide with reference to Use is described, is not used to limit the present invention.

Fig. 1 is that the present invention utilizes the waste heat of drying machine to be evaporated the flow chart of the system concentrated.

In figure: 1. seperator；1a. purified liquor outlet；1b. wet ethanol slag exports；2. feed conveying worm；3. the first tube bank Drying machine；3a. the first feed auger；3b. the first T-piece splitting valve；3c. the first returning charge conveying worm；3d. the first cyclone； 4. the second pipe bundle drier；4a. the second feed auger；4b. the second T-piece splitting valve；4c. the second returning charge conveying worm；4d. Second cyclone；4e. the first mixer；4f. first adds slurry valve；5. the 3rd pipe bundle drier；5a. the 3rd feed auger；5b. Three T-piece splitting valves；5c. the 3rd returning charge conveying worm；5d. the 3rd cyclone；5e. the second mixer；5f. second adds slurry valve； 6. discharging spiral conveyor；7. used heat absorption tower；7a. absorption tower air inlet；7b. absorption tower air vent；7c. cloth liquid dish；7d. fills out The bed of material；7e. water-collecting tray；7f. absorption tower exhaust blower；7g. absorption tower circulating pump；8. used heat flash tank；8a. used heat flash tank enters Mouthful；8b. used heat flash tank steam (vapor) outlet；8c. flash tank discharge outlet；9. condensate water pot；9a. condensate pump；10. multi-stage countercurrent is cold But tower；10a. fan housing；10b. sack cleaner；11. cooling tower air exhausters；12. exhaust gas washing towers；12a. scrubbing tower air inlet； 12b. scrubbing tower air vent；12c. scrubbing tower discharge outlet；12d. scrubbing tower spray pump；12e. sprays tank；13. used heat effect heat exchange Device；13a. used heat effect heat exchanger material inlet；13b. used heat effect heat exchanger material outlet；13c. used heat effect heat exchanger air inlet； 13d. used heat effect heat exchanger air vent；13e. used heat effect heat exchanger dirt condensate discharge mouth；13f. used heat effect circulating pump；13g. gives up Thermal effect material outlet tube；13h. used heat effect exhaust blower；14. used heat effect separators；14a. used heat effect separator air vent；14b. gives up Thermal effect separator material outlet；15. concentrated solution holding vessels；16. screw pumps；17. 1 effect heat exchangers；17a. mono-imitates heat exchanger material Entrance；17b. mono-imitates heat exchanger material outlet；17c. mono-imitates heat exchanger air inlet；17d. mono-imitates heat exchanger air vent；17e. mono- Effect heat exchanger condensate drain outlet；17f. mono-imitates circulating pump；17g. mono-imitates material outlet tube；18. 1 effect separators；18a. mono-is imitated Separator air vent；18b. mono-imitates separator material outlet；19. 2 effect heat exchangers；19a. bis-imitates heat exchanger material inlet；19b. Two effect heat exchanger material outlets；19c. bis-imitates heat exchanger air inlet；19d. bis-imitates heat exchanger air vent；It is cold that 19e. bis-imitates heat exchanger Solidifying water outlet；19f. bis-imitates circulating pump；19g. bis-imitates material outlet tube；19h. bis-imitates heat exchanger condensing water inlet；20. 2 effects Separator；20a. bis-imitates separator air vent；20b. bis-imitates separator material outlet；21. three-effect heat exchangers；21a. triple effect heat exchange Device material inlet；21b. three-effect heat exchanger material outlet；21c. three-effect heat exchanger air inlet；21d. three-effect heat exchanger air vent； 21e. three-effect heat exchanger condensate drain outlet；21f. triple effect cycle pump；21g. triple effect material outlet tube；21h. three-effect heat exchanger is cold Solidifying water inlet；22. triple effect separators；22a. triple effect separator air vent；22b. triple effect separator material outlet；22c. clear liquid Charging aperture；23. condensers；23a. condenser cooling water entrance；23b. condenser cooling water exports；23c. condenser air inlet； 23d. condenser exhaust gas mouth；23e. condenser condensate drain outlet；24. Condensed water collection tanks；24a. coagulates water delivery pump；25. vacuum Pump；G1. total concentrated solution pipe；G2.DDGS production tube；G3. flash-off steam pipe；G4. bleed house steward.

Detailed description of the invention

As it is shown in figure 1, the system that the present invention utilizes the waste heat of drying machine to be evaporated concentrating includes being sequentially connected in series material First pipe bundle drier the 3, second pipe bundle drier 4 and the 3rd pipe bundle drier 5 of heating, seperator 1 and Alcohol Plant give up mash Pipe is connected, and the purified liquor outlet 1a of seperator 1 is connected with clear liquid concentration systems entrance, the outlet of clear liquid concentration systems and total concentrated solution Pipe G1 is connected, and the wet ethanol slag outlet 1b of seperator 1 is connected with the charging aperture of feed conveying worm 2, feed conveying worm 2 The first discharging opening and the first pipe bundle drier 3 the first feed auger 3a entrance connect, the discharging of the first pipe bundle drier 3 Mouth is connected with the entrance of the first T-piece splitting valve 3b, the returning charge mouth of the first T-piece splitting valve 3b and the first returning charge conveying worm 3c Lower inlet connect, the entrance connection of the top exit of the first returning charge conveying worm 3c and the first feed auger 3a；First The discharging opening of T-piece splitting valve 3b is connected with the head inlet of discharging spiral conveyor 6, the centre exit of discharging spiral conveyor 6 It is connected with the lower inlet of the second returning charge conveying worm 4c, the top exit of the second returning charge conveying worm 4c and the first mixing The charging aperture of machine 4e connects；Second discharging opening of feed conveying worm 2 also charging aperture with the first mixer 4e is connected, the denseest Contracting liquid pipe G1 adds slurry valve 4f also charging aperture with the first mixer 4e through first and is connected；The discharging opening of the first mixer 4e and The entrance of the second feed auger 4a of two pipe bundle driers 4 connects.

The discharging opening of the second pipe bundle drier 4 and the entrance of the second T-piece splitting valve 4b are connected, the second T-piece splitting valve 4b Returning charge mouth be connected with the anterior entrance of discharging spiral conveyor 6, the discharging opening of the second T-piece splitting valve 4b and discharging spiral transferring The rear entry sending machine 6 connects.

The caudal end egress of discharging spiral conveyor 6 and the lower inlet of the 3rd returning charge conveying worm 5c connect, and the 3rd returns The top exit of material conveying worm 5c and the charging aperture of the second mixer 5e connect, and total concentrated solution pipe G1 adds slurry valve 5f through second Also the charging aperture with the second mixer 5e is connected；The discharging opening of the second mixer 5e and the 3rd charging of the 3rd pipe bundle drier 5 The entrance of spiral 5a connects.

The discharging opening of the 3rd pipe bundle drier 5 and the entrance of the 3rd T-piece splitting valve 5b are connected, the 3rd T-piece splitting valve 5b Returning charge mouth and the 3rd returning charge conveying worm 5c centre entrance connect, the discharging opening of the 3rd T-piece splitting valve 5b becomes with DDGS QC G2 connects.

The job step of system that the present invention utilizes the waste heat of drying machine to be evaporated concentrating is as follows:

(1) Alcohol Plant's separated machine of mash 1 that gives up is separated into wet ethanol slag and clear liquid, and the water content of wet ethanol slag is 65～72%, Seperator 1 can use horizontal screw centrifuge or filter press.

The most above-mentioned clear liquid carries out concentration and becomes the concentrated solution total concentrated solution pipe G1 of entrance, and above-mentioned wet ethanol slag is from wet ethanol Slag outlet 1b enters feed conveying worm 2, and a part enters the first charging spiral shell from the first discharging opening of feed conveying worm 2 Rotation 3a, is sent into the first pipe bundle drier 3 by the first feed auger 3a and carries out one-level and be dried.

(3) one-level dried ethanol slag is discharged from the discharging opening of the first pipe bundle drier 3, by the first T-piece splitting valve 3b Controlling returning charge ratio, the ethanol slag of one-level returning charge returns to the entrance of the first feed auger 3a through the first returning charge conveying worm 3c, and one The head inlet of the ethanol slag entrance discharging spiral conveyor 6 of level discharging is delivered to the middle part of discharging spiral conveyor 6 backward and goes out Mouth is discharged, and the discharging moisture control that one-level is dried is 15～30%.

(4) the ethanol slag of one-level discharging is after the centre exit of discharging spiral conveyor 6 is discharged, through the second returning charge spiral transferring The machine 4c of sending delivers to the charging aperture of the first mixer 4e；Another part of step the wettest ethanol slag is from the of feed conveying worm 2 Two discharging openings discharge the charging aperture also into the first mixer 4e, and step concentrated solution (2) adds slurry valve 4f also into first through first The charging aperture of mixer 4e, after the first mixer 4e mix homogeneously, one-level adds the ethanol slag of slurry and enters the second feed auger 4a, Sent into the second pipe bundle drier 4 by the second feed auger 4a and carry out secondary drying.

(5) the ethanol slag after secondary drying is discharged from the discharging opening of the second pipe bundle drier 4, by the second T-piece splitting valve 4b Controlling returning charge ratio, the ethanol slag of two grades of returning charges enters the anterior entrance of discharging spiral conveyor 6, is total to the ethanol slag of one-level discharging Discharge, subsequently into the lower end of the second returning charge conveying worm 4c with the centre exit being delivered to discharging spiral conveyor 6 backward Entrance；The ethanol slag of two grades of dischargings enters the rear entry of discharging spiral conveyor 6 and is delivered to discharging spiral conveyor 6 backward Caudal end egress is discharged, and the discharging moisture control of secondary drying is 15～30%.

(6) the ethanol slag of two grades of dischargings is after the caudal end egress of discharging spiral conveyor 6 is discharged, and enters the 3rd returning charge spiral The lower inlet of conveyer 5c, and the charging aperture of the second mixer 5e is delivered to by the 3rd returning charge conveying worm 5c；Step is (2) Concentrated solution add slurry valve 5f also into the charging aperture of the second mixer 5e, after the second mixer 5e mix homogeneously, two through second Level adds the ethanol slag of slurry and enters the 3rd feed auger 5a, the 3rd feed auger 5a send into the 3rd pipe bundle drier 5 and carry out three grades It is dried.

(7) the ethanol slag after three-stage drying is discharged from the discharging opening of the 3rd pipe bundle drier 5, by the 3rd T-piece splitting valve 5b controls returning charge ratio, and the ethanol slag of three grades of returning charges enters second charging aperture of the 3rd returning charge conveying worm 5c, by the 3rd returning charge Conveying worm 5c returns to the charging aperture of the second mixer 5e；The ethanol slag of three grades of dischargings becomes DDGS feedstuff from DDGS finished product Mouth is discharged into DDGS production tube G2, and the discharging moisture control of three-stage drying, 10～12%, enters multi-stage countercurrent cooling tower cold But.

The offgas outlet at first pipe bundle drier the 3, second pipe bundle drier 4 top respectively with the first cyclone 3d, second The air inlet of cyclone 4d connects, the first cyclone 3d, the second cyclone 4d air outlet respectively with used heat absorption tower 7 in the middle part of Absorption tower air inlet 7a connects, and the offgas outlet at the 3rd pipe bundle drier 5 top and the air inlet of the 3rd cyclone 5d connect, the The air outlet of three cyclone 5d is connected with the scrubbing tower air inlet 12a in the middle part of exhaust gas washing tower 12.

The tail gas that first pipe bundle drier the 3, second pipe bundle drier 4 is discharged is respectively through the first cyclone 3d, the second picogram The common absorption tower air inlet 7a entered in the middle part of used heat absorption tower 7, the tail gas warp that the 3rd pipe bundle drier 5 is discharged after dragon 4d dedusting The scrubbing tower air inlet 12a in the middle part of exhaust gas washing tower 12 is entered after 3rd cyclone 5d dedusting.First pipe bundle drier 3, second Pipe bundle drier 4 discharge be high-quality tail gas, dust content is low, temperature at 90～96 DEG C, air weight content be 30～ 50%, vapour content is high, temperature is high, enters used heat absorption tower 7 and reclaim after the first cyclone 3d, the second cyclone 4d dedusting Heat.What the 3rd pipe bundle drier 5 was discharged is low quality tail gas, and dust content is high, temperature at 75～90 DEG C, air weight content It is 60～70%, after entering exhaust gas washing tower 12 washing after dedusting, reclaims heat.

The entrance of the absorption tower air vent 7b and absorption tower exhaust blower 7f at top, used heat absorption tower 7 is connected, used heat absorption tower 7 Inner chamber top be provided with packing layer 7d, packing layer 7d be arranged over cloth liquid dish 7c, the bottom on used heat absorption tower 7 is provided with water-collecting tray 7e, the discharge outlet bottom water-collecting tray 7e is connected with the used heat flash tank entrance 8a in the middle part of used heat flash tank 8, and used heat flash tank 8 pushes up The used heat flash tank steam (vapor) outlet 8b in portion is connected with flash-off steam pipe G3, flash tank discharge outlet 8c bottom used heat flash tank 8 with The entrance of absorption tower circulating pump 7g is connected, and the outlet of absorption tower circulating pump 7g is by absorption tower circulation pipe and cloth Ye Pan 7c center Filling pipe is connected.

The high-quality tail gas that first pipe bundle drier the 3, second pipe bundle drier 4 is discharged enters useless from absorption tower air inlet 7a In heat absorption tower 7, flow upwardly through packing layer 7d, in packing layer 7d, drench, with cloth liquid dish 7c, the recirculated water carry out hot and humid area also Being washed, waste gas is extracted out by absorption tower exhaust blower 7f, and the recirculated water after temperature raises falls in water-collecting tray 7e, at suction function Lower inflow used heat flash tank 8, after in used heat flash tank 8, flash distillation becomes 85 ± 5 DEG C of flash-off steams entrance flash-off steam pipe G3 confessions Procedure uses, and the condensed water bottom used heat flash tank 8 is extracted out by absorption tower circulating pump 7g and returns to the cloth on used heat absorption tower 7 Liquid dish 7c removes circulated sprinkling.

The steam condensate (SC) that first pipe bundle drier the 3, second pipe bundle drier 4 and the 3rd pipe bundle drier 5 are discharged is common Enter in condensate water pot 9, become flash-off steam after a part of condensed water flash and enter flash-off steam pipe G3, another part condensed water The water pump 9a that is condensed extracts out and is sent to boiler room.The steam condensate (SC) that the tube bank of each pipe bundle drier is discharged is the cleanest, condensed water The flash-off steam produced after tank 9 flash distillation is also into flash-off steam pipe G3 for later process, and the condensed water of remnants is condensed water Pump 9a extracts out and is sent to boiler room, can be directly as boiler replenishing water.

The DDGS feedstuff that DDGS production tube G2 discharges enters in multi-stage countercurrent cooling tower 10 and discharges after cooling, and multi-stage countercurrent is cold But tower 10 includes that cooling tower tower body, the top of cooling tower tower body are provided with fan housing 10a, the outlet of fan housing 10a and sack cleaner 10b Entrance connect, the outlet of sack cleaner 10b is connected with cooling tower air exhauster 11.

The inner chamber top of exhaust gas washing tower 12 is provided with shower, and scrubbing tower air inlet 12a is positioned at below shower, shower Outlet with scrubbing tower spray pump 12d is connected, and the entrance of scrubbing tower spray pump 12d is connected with spray tank 12e, exhaust gas washing tower Scrubbing tower discharge outlet 12c alignment spray tank 12e bottom 12；The scrubbing tower air vent 12b at exhaust gas washing tower 12 top is with useless Used heat effect heat exchanger air inlet 13c at thermal effect heat exchanger 13 shell side top is connected, the used heat of used heat effect heat exchanger 13 shell side bottom Effect heat exchanger air vent 13d is connected with the entrance of used heat effect exhaust blower 13h；The used heat effect of used heat effect heat exchanger 13 shell side bottom is changed Hot device dirt condensate discharge mouth 13e is connected with Sewage Disposal；The feed separation mouth of used heat effect heat exchanger 13 bottom is by connection Pipe is connected with used heat effect separator 14, and the top of used heat effect separator 14 is provided with used heat effect separator air vent 14a, and used heat effect is changed Used heat effect heat exchanger material outlet 13b bottom hot device 13 and used heat imitate the used heat effect separator material outlet bottom separator 14 The entrance that 14b imitates circulating pump 13f with used heat jointly is connected, and the entrance of used heat effect circulating pump 13f also imitates material outlet tube 17g with one Outlet be connected；The outlet of used heat effect circulating pump 13f connects with the used heat effect heat exchanger material inlet 13a of used heat effect heat exchanger 13 Connecing, the outlet of used heat effect circulating pump 13f is connected with the entrance of concentrated solution holding vessel 15 also by used heat effect material outlet tube 13g； The bottom of concentrated solution holding vessel 15 is connected with the entrance of screw pump 16, and the outlet of screw pump 16 is connected with total concentrated solution pipe G1.

The low quality tail gas that 3rd pipe bundle drier 5 is discharged, after the 3rd cyclone 5d dedusting, enters exhaust gas washing tower 12 The scrubbing tower air inlet 12a at middle part, during flowing up, the recirculated water sprayed by shower washs, and washings fall into In spray tank 12e, it is washed tower spray pump 12d extraction and is sent to shower circulated sprinkling.Tail gas after washing washs from waste gas The scrubbing tower air vent 12b at tower 12 top discharges, and under the suction of used heat effect exhaust blower 13h, low quality tail gas enters used heat effect Used heat effect heat exchanger air inlet 13c at heat exchanger 13 shell side top, imitates concentration to the used heat of tube side during flowing downward Liquid heats, and the dirt discharged from the used heat effect heat exchanger dirt condensate discharge mouth 13e of used heat effect heat exchanger 13 shell side bottom is cold Lime set enters after Sewage Disposal processes and discharges.

Used heat effect heat exchanger 13 bottom used heat effect concentrated solution, used heat effect separator 14 bottom used heat effect concentrated solution and from The effect concentrated solution that one effect material outlet tube 17g comes is extracted out by used heat effect circulating pump 13f jointly, is sent to used heat effect heat exchanger material Entrance 13a enters used heat effect heat exchanger 13 and is circulated heating, and the used heat effect concentrated solution after heating is from entering used heat effect communicating pipe Separating in separator 14, moisture evaporation becomes the used heat effect steam of 65 ± 5 DEG C from used heat effect separator air vent 14a row Going out, the used heat effect concentrated solution after concentration enters used heat effect circulating pump 13f circulation, part from used heat effect separator material outlet 14b The used heat effect concentrated solution of used heat effect circulating pump 13f outlet is discharged from used heat effect material outlet tube 13g, enters concentrated solution holding vessel 15 Store, extracted out the total concentrated solution pipe G1 of feeding by screw pump 16 and add slurry make for the second pipe bundle drier 4 and the 3rd pipe bundle drier 5 With, in concentrated solution holding vessel 15, the weight concentration of concentrated solution is 31%～35%.

The outlet of flash-off steam pipe G3 is connected with effect heat exchanger air inlet 17c at an effect heat exchanger 17 shell side top, and one One effect heat exchanger air vent 17d of effect heat exchanger 17 shell side bottom is connected with the house steward G4 that bleeds；The thing of one effect heat exchanger 17 bottom Material separating opening was connected with an effect separator 18 by communicating pipe, and the top of an effect separator 18 is provided with an effect separator air vent 18a, the effect heat exchanger material outlet 17b bottom an effect heat exchanger 17 and the effect separator material bottom an effect separator 18 Outlet 18b is connected with an entrance imitating circulating pump 17f jointly, and the entrance of an effect circulating pump 17f also imitates material outlet tube 19g with two Outlet be connected；The outlet of one effect circulating pump 17f is connected with an effect heat exchanger material inlet 17a of an effect heat exchanger 17, an effect The outlet of circulating pump 17f is also connected with an effect material outlet tube 17g.

Under the swabbing action of house steward G4 of bleeding, 85 ± 5 DEG C of flash distillations that used heat flash tank 8 and condensate water pot 9 flash off Steam enters effect heat exchanger air inlet 17c at an effect heat exchanger 17 shell side top from flash-off steam pipe G3, flow downward During the one of tube side effect concentrated solution is heated, the effect concentrated solution bottom an effect heat exchanger 17, effect separator 18 end The one of portion is imitated concentrated solution and is jointly extracted out by an effect circulating pump 17f from two two next for effect material outlet tube 19g effect concentrated solutions, is sent to One effect heat exchanger material inlet 17a enters an effect heat exchanger 17 and is circulated heating, and the effect concentrated solution after heating is from communicating pipe Entering in an effect separator 18 and separate, moisture evaporation becomes the two effect steam of 72 ± 5 DEG C from an effect separator air vent 18a Discharging, the effect concentrated solution after concentration enters an effect circulating pump 17f circulation from an effect separator material outlet 18b, and part one is imitated One effect concentrated solution of circulating pump 17f outlet discharges the entrance conveying to used heat effect circulating pump 13f from an effect material outlet tube 17g, Entrance next stage concentrates, and in an effect material outlet tube 17g, the weight concentration of concentrated solution is 25%～27%.The flash distillation that temperature is the highest is steamed Vapour with through three grades concentrate one effect concentrated solutions carried out heat exchange, it is ensured that concentrated effect.

Two effect heat exchanger air inlet 19c at one effect separator air vent 18a and two effect heat exchanger 19 shell side tops are connected, and one An effect heat exchanger condensate drain outlet 17e bottom effect heat exchanger 17 shell side and two effect heat exchange in the middle part of two effect heat exchanger 19 shell sides Device condensing water inlet 19h connects, two effect heat exchanger air vent 19d and house steward's G4 phases of bleeding of two effect heat exchanger 19 shell side bottoms Even；The feed separation mouth of two effect heat exchanger 19 bottoms was connected with two effect separators 20 by communicating pipe, the top of two effect separators 20 Portion is provided with two effect separator air vent 20a, two effect heat exchanger material outlet 19b bottom two effect heat exchangers 19 and two effect separators Two effect separator material outlet 20b bottom 20 are connected with two entrances imitating circulating pump 19f jointly, and two effect circulating pump 19f enter Mouth also outlet with triple effect material outlet tube 21g is connected；The outlet of two effect circulating pump 19f imitates heat exchange with the two of two effect heat exchangers 19 Device material inlet 19a connects, and the outlet of two effect circulating pump 19f is also connected with two effect material outlet tube 19g.

Under the swabbing action of house steward G4 of bleeding, the two effect steam discharged from an effect separator air vent 18a enter two effects Two effect concentrated solutions of tube side are entered during flowing downward by two effect heat exchanger air inlet 19c at heat exchanger 19 shell side top Row heating, becomes two effect condensed waters after two effect steam heat releases and continues to flow downward.An effect from an effect heat exchanger 17 shell side bottom The effect condensed water that heat exchanger condensate drain outlet 17e discharges enters two effect heat exchanger condensations in the middle part of two effect heat exchanger 19 shell sides Water inlet 19h, flows downward continuation to two effect concentrated solution heating jointly with two effect condensed waters.Two effects bottom two effect heat exchangers 19 Bottom concentrated solution, two effect separators 20 two imitate concentrated solutions and the triple effect concentrated solution quilt jointly come from triple effect material outlet tube 21g Two effect circulating pump 19f extract out, are sent to two effect heat exchanger material inlet 19a entrance two effect heat exchangers 19 and are circulated heating, heating After two effect concentrated solutions from communicating pipe enter two effect separators 20 separate, moisture evaporation become 65 ± 5 DEG C triple effect steam Vapour is discharged from two effect separator air vent 20a, and two effect concentrated solutions after concentration enter two effects from two effect separator material outlet 20b Circulating pump 19f circulates, and part two imitates two effect concentrated solutions of circulating pump 19f outlet from two effect material outlet tube 19g discharges to an effect The entrance conveying of circulating pump 17f, enters next stage and concentrates, in two effect material outlet tube 19g the weight concentration of concentrated solution be 18%～ 20%.The two effect steam that temperature is higher carry out heat exchange with the two effect concentrated solutions concentrated through two-stage, and concentrated effect is good.

Two effect separator air vent 20a are connected with the three-effect heat exchanger air inlet 21c at three-effect heat exchanger 21 shell side top, and two Two effect heat exchanger condensate drain outlet 19e bottom effect heat exchanger 19 shell side and the triple effect heat exchange in the middle part of three-effect heat exchanger 21 shell side Device condensing water inlet 21h connects, the three-effect heat exchanger air vent 21d of three-effect heat exchanger 21 shell side bottom and house steward's G4 phase of bleeding Even；The feed separation mouth of three-effect heat exchanger 21 bottom passes through to be connected with triple effect separator 22 communicating pipe, the top of triple effect separator 22 Portion is provided with triple effect separator air vent 22a, the three-effect heat exchanger material outlet 21b bottom three-effect heat exchanger 21 and triple effect separator Triple effect separator material outlet 22b bottom 22 is connected with the entrance of triple effect cycle pump 21f jointly, and seperator 1 is isolated clearly Liquid is connected with the clear liquid charging aperture 22c of triple effect separator 22 bottom by clear liquid pipe；The outlet of triple effect cycle pump 21f is changed with triple effect The three-effect heat exchanger material inlet 21a of hot device 21 connects, the outlet of triple effect cycle pump 21f also with triple effect material outlet tube 21g phase Even.

Under the swabbing action of house steward G4 of bleeding, the triple effect steam discharged from two effect separator air vent 20a enters triple effect The three-effect heat exchanger air inlet 21c at heat exchanger 21 shell side top, enters the triple effect concentrated solution of tube side during flowing downward Row heating, becomes triple effect condensed water after triple effect steam heat release and continues to flow downward.Two effects from two effect heat exchanger 19 shell side bottoms The two effect condensed waters that heat exchanger condensate drain outlet 19e discharges enter the three-effect heat exchanger condensation in the middle part of three-effect heat exchanger 21 shell side Water inlet 21h, triple effect concentrated solution is heated by the continuation that jointly flows downward with triple effect condensed water.Step (2) Alcohol Plant give up mash separate The weight concentration of the clear liquid gone out is 4.5%～5.5%, and clear liquid enters the clear liquid charging aperture of triple effect separator 22 bottom by clear liquid pipe 22c, mixes with triple effect concentrated solution, and the triple effect concentrated solution bottom three-effect heat exchanger 21 and bottom triple effect separator 22 is jointly by triple effect Circulating pump 21f extracts out, is sent to three-effect heat exchanger material inlet 21a and is circulated heating, and the triple effect concentrated solution after heating is from connection Pipe enters in triple effect separator 22 and separates, and moisture evaporation becomes the quadruple effect steam of 50 ± 5 DEG C from triple effect separator air vent 22a discharges；Triple effect concentrated solution after concentration enters triple effect cycle pump 21f circulation, part three from triple effect separator material outlet 22b The triple effect concentrated solution of effect circulating pump 21f outlet discharges the entrance conveying to two effect circulating pump 19f from triple effect material outlet tube 21g, Entrance next stage concentrates, and in triple effect material outlet tube 21g, the weight concentration of concentrated solution is 11%～13%.The triple effect steaming that temperature is relatively low Vapour and the triple effect concentrated solution carrying out primary concentration carry out heat exchange, and concentrated effect is good.

Triple effect separator air vent 22a is connected with the house steward G4 that bleeds, in the outlet of the house steward G4 that bleeds and condenser 23 shell side The condenser air inlet 23c in portion is connected, the condenser exhaust gas mouth 23d of condenser 23 shell side bottom and the entrance phase of vacuum pump 25 Even；Condenser condensate drain outlet 23e bottom condenser 23 shell side is connected with the entrance of Condensed water collection tank 24, Condensed water collection tank The top of 24 is connected with the house steward G4 that bleeds, and the bottom of Condensed water collection tank 24 is connected with the entrance of solidifying water delivery pump 24a, solidifying water conveying The outlet of pump 24a is connected with filling pipe and the Sewage Disposal of spray tank 12e by valve respectively；Three-effect heat exchanger 21 shell side The three-effect heat exchanger condensate drain outlet 21e of bottom is connected with the entrance of Condensed water collection tank 24.

Under the swabbing action of vacuum pump 25, an effect heat exchanger air vent 17d, two effect heat exchanger air vent 19d, triple effect change Incoagulable gas and the quadruple effect steam of triple effect separator air vent 22a discharge that hot device air vent 21d discharges are all total by bleeding Pipe G4 enters the condenser air inlet 23c on condenser 23 shell side top, from top to bottom along shell fluid flow and by the cooling water of tube side Cooling, finally escapes and enter vacuum pump 25 from condenser exhaust gas mouth 23d indirectly；Cooling water is from condenser cooling water entrance 23a Enter, from bottom to top along tube side flow, discharge from condenser cooling water outlet 23b.The condenser of condenser 23 shell side bottom is cold The condensed water that solidifying water outlet 23e discharges enters Condensed water collection tank 24, and the three-effect heat exchanger bottom three-effect heat exchanger 21 shell side is cold The condensed water that solidifying water outlet 21e discharges passes through also into Condensed water collection tank 24, the incoagulable gas at Condensed water collection tank 24 top Gas house steward be sucked away.The condensation water that Condensed water collection tank 24 is collected contains a certain amount of COD(COD and characterizes organic Thing content), need could discharge after Sewage Disposal processes, the present invention backs into spray tank 12e, washs as waste gas The spray washing water of tower 12, it is achieved ladder utilizes.

One effect heat exchanger 17, two effect heat exchanger 19, the shell side top of three-effect heat exchanger 21 are respectively equipped with incoagulable gas and take out QI KOU, each incoagulable gas bleeding point is connected with the house steward G4 that bleeds by auxiliary exhaust valve respectively.System is permissible before putting into operation Open each auxiliary exhaust valve, intrasystem incoagulable gas is extracted out, improve an effect heat exchanger 17, two and imitate heat exchanger 19, triple effect The heat exchange efficiency of heat exchanger 21.

One effect heat exchanger 17, two effect heat exchanger 19, three-effect heat exchanger 21 shell side bottom be connected to one, two, triple effect Shell side knockout drum, one effect heat exchanger air vent 17d, two effect heat exchanger air vent 19d, three-effect heat exchanger air vent 21d respectively with One, two, the top of triple effect shell side knockout drum be connected, an effect heat exchanger condensate drain outlet 17e, two effect heat exchanger condensed water eliminations Mouthful 19e, three-effect heat exchanger condensate drain outlet 21e and, two, the bottom of triple effect shell side knockout drum is connected.

One effect heat exchanger 17, two effect heat exchanger 19, three-effect heat exchanger 21 and condenser 23 are many backhauls baffle pipe shell-type Heat exchanger.Steam flowing stroke in heat exchanger shell pass can be extended by the separation of deflection plate, can by the tube sheet at two ends Diffraction current is carried out realizing concentrated solution, to increase heat-exchange time and the heat exchange area of steam and concentrated solution at tube side.

The foregoing is only the preferable possible embodiments of the present invention, the non-patent protection model therefore limiting to the present invention Enclose.In addition to the implementation, the present invention can also have the skill that other embodiments, all employing equivalents or equivalent transformation are formed Art scheme, all falls within the protection domain of application claims.The present invention can pass through or use existing without the technical characteristic described There is technology to realize, do not repeat them here.

Claims (10)

1. the waste heat utilizing drying machine is evaporated the system concentrated, including the first tube bank that material is sequentially connected in series heating Drying machine, the second pipe bundle drier and the 3rd pipe bundle drier, the offgas outlet at described first, second and third pipe bundle drier top Air inlet with first, second and third cyclone is connected respectively, it is characterised in that: the air outlet of described first and second cyclone respectively with Absorption tower air inlet in the middle part of used heat absorption tower connects, the absorption tower air vent at top, described used heat absorption tower and absorption tower air draft The entrance of machine connects, and the inner chamber top on described used heat absorption tower is provided with packing layer, described packing layer be arranged over cloth liquid dish, institute The bottom stating used heat absorption tower is provided with the used heat flash distillation in the middle part of water-collecting tray, the discharge outlet bottom described water-collecting tray and used heat flash tank Tank entrance is connected, and the used heat flash tank steam (vapor) outlet of described used heat flash drum overhead is connected with flash-off steam pipe, and described used heat dodges Flash tank discharge outlet bottom steaming pot is connected with the entrance of absorption tower circulating pump, and circulation delivery side of pump in described absorption tower is by absorbing Tower circulation pipe is connected with the filling pipe of described Bu Ye disk center.

The waste heat utilizing drying machine the most according to claim 1 is evaporated the system concentrated, it is characterised in that: described the One, tube bank condensed water row's mouth of two, three pipe bundle driers is connected with the condensate water pot entrance in the middle part of condensate water pot jointly, described cold Solidifying water pot top is provided with condensate water pot steam (vapor) outlet, and described condensate water pot steam (vapor) outlet is connected with described flash-off steam pipe, described Condensate water pot discharge outlet bottom condensate water pot is connected with the entrance of condensate pump, described condensed water delivery side of pump and boiler room Soften water feed pipe to connect.

The waste heat utilizing drying machine the most according to claim 1 and 2 is evaporated the system concentrated, it is characterised in that: institute State the air outlet of the 3rd cyclone to be connected with the scrubbing tower air inlet in the middle part of exhaust gas washing tower, on the inner chamber of described exhaust gas washing tower Portion is provided with shower, and described shower is connected with scrubbing tower spray delivery side of pump, the entrance of described scrubbing tower spray pump and spray Tank is connected, and the exhaust gas washing tower discharge outlet bottom described exhaust gas washing tower is directed at described spray tank；Described exhaust gas washing tower The exhaust gas washing tower air vent at top is connected with the used heat effect heat exchanger air inlet at used heat effect heat exchanger shell pass top, described used heat The used heat effect heat exchanger air vent of effect heat exchanger shell pass bottom is connected with the entrance of used heat effect exhaust blower；Described used heat effect heat exchanger The used heat effect heat exchanger dirt condensate discharge mouth of shell side bottom is connected with Sewage Disposal；The thing of described used heat effect heat exchanger bottom Material separating opening was connected with used heat effect separator by communicating pipe, and the top of described used heat effect separator is provided with used heat effect separator row QI KOU, the used heat effect heat exchanger material outlet of described used heat effect exchanger base and the used heat effect of described used heat effect separator bottom The entrance that separator material outlet imitates circulating pump with used heat jointly is connected, and the entrance of described used heat effect circulating pump also imitates material with one The outlet of outlet tube is connected；Described used heat effect circulation delivery side of pump enters with the used heat effect heat exchanger material of described used heat effect heat exchanger Mouth connects, and described used heat effect circulation delivery side of pump is connected with the entrance of concentrated solution holding vessel also by used heat effect material outlet tube； The described bottom of concentrated solution holding vessel is connected with the entrance of screw pump, and described screw rod delivery side of pump is connected with total concentrated solution pipe.

The waste heat utilizing drying machine the most according to claim 3 is evaporated the system concentrated, it is characterised in that: described sudden strain of a muscle One effect heat exchanger air inlet of the outlet and an effect heat exchanger shell pass top of steaming steam pipe is connected, under a described effect heat exchanger shell pass The one effect heat exchanger air vent in portion is connected with the house steward that bleeds；Described one effect heat exchanger bottom feed separation mouth by communicating pipe with One effect separator is connected, and the top of a described effect separator is provided with an effect separator air vent, a described effect exchanger base One effect separator material outlet of one effect heat exchanger material outlet and a described effect separator bottom is common imitates circulating pump with one Entrance connects, and the entrance of a described effect circulating pump is also connected with two outlets imitating material outlet tubes；Going out of a described effect circulating pump Mouth is connected with an effect heat exchanger material inlet of a described effect heat exchanger, and a described effect circulation delivery side of pump also imitates thing with described one Material outlet tube is connected.

The waste heat utilizing drying machine the most according to claim 4 is evaporated the system concentrated, it is characterised in that: described one The two effect heat exchanger air inlet at effect separator air vent and two effect heat exchanger shell pass tops are connected, at the bottom of a described effect heat exchanger shell pass The one effect heat exchanger condensate drain outlet in portion is connected with two effect heat exchanger condensing water inlets in the middle part of described two effect heat exchanger shell pass, Two effect heat exchanger air vents of described two effect heat exchanger shell pass bottoms are connected with the described house steward of bleeding；Described two effect heat exchanger bottoms Feed separation mouth by communicating pipe with two effect separators be connected, described two imitate separators tops be provided with two effect separator aerofluxuss Mouthful, two effect heat exchanger material outlets of described two effect exchanger base and the described two two effect separator materials imitating separator bottom Common and two effect circulating pumps the entrances of outlet are connected, described two imitate the entrance of circulating pumps also with the outlet phase of triple effect material outlet tube Even；Described two effect circulation delivery side of pump are connected with two effect heat exchanger material inlets of described two effect heat exchangers, described two effect circulations Delivery side of pump is also connected with described two effect material outlet tubes.

The waste heat utilizing drying machine the most according to claim 5 is evaporated the system concentrated, it is characterised in that: described two Effect separator air vent is connected with the three-effect heat exchanger air inlet at three-effect heat exchanger shell side top, at the bottom of described two effect heat exchanger shell pass The two effect heat exchanger condensate drain outlets in portion are connected with the three-effect heat exchanger condensing water inlet in the middle part of described three-effect heat exchanger shell side, The three-effect heat exchanger air vent of described three-effect heat exchanger shell side bottom is connected with the described house steward of bleeding；Described three-effect heat exchanger bottom Feed separation mouth by being connected with triple effect separator communicating pipe, the top of described triple effect separator is provided with triple effect separator aerofluxus Mouthful, the three-effect heat exchanger material outlet bottom described three-effect heat exchanger and the triple effect separator material of described triple effect separator bottom Outlet is connected with the entrance of triple effect cycle pump jointly, and Alcohol Plant's isolated clear liquid of mash that gives up is divided with described triple effect by clear liquid pipe Clear liquid charging aperture from device bottom is connected；Described triple effect cycle delivery side of pump and the three-effect heat exchanger material of described three-effect heat exchanger Entrance connects, and described triple effect cycle delivery side of pump is also connected with described triple effect material outlet tube.

The waste heat utilizing drying machine the most according to claim 6 is evaporated the system concentrated, it is characterised in that: described three Effect separator air vent is connected with the described house steward of bleeding, described in the outlet of house steward of bleeding enter with the condenser on condenser shell side top QI KOU is connected, and the condenser exhaust gas mouth of described condenser shell side bottom is connected with the entrance of vacuum pump；At the bottom of described condenser shell side The condenser condensate drain outlet in portion is connected with the entrance of Condensed water collection tank, always bleeds with described in the top of described Condensed water collection tank Pipe is connected, and the bottom of described Condensed water collection tank is connected with the entrance of solidifying water delivery pump, and described solidifying water conveying delivery side of pump leads to respectively Cross valve to be connected with filling pipe and the Sewage Disposal of described spray tank；Triple effect heat exchange bottom described three-effect heat exchanger shell side Device condensate drain outlet is connected with the entrance of described Condensed water collection tank.

The waste heat utilizing drying machine the most according to claim 6 is evaporated the system concentrated, it is characterised in that: described One, two, the shell side top of three-effect heat exchanger be respectively equipped with incoagulable gas bleeding point, each described incoagulable gas bleeding point is respectively It is connected with the described house steward of bleeding by auxiliary exhaust valve.

The waste heat utilizing drying machine the most according to claim 6 is evaporated the system concentrated, it is characterised in that: described One, two, be connected to one bottom the shell side of three-effect heat exchanger, two, triple effect shell side knockout drum, described one, two, three-effect heat exchanger Air vent respectively with described one, two, the top of triple effect shell side knockout drum be connected, described one, two, three-effect heat exchanger condensed water elimination Mouthful with described one, two, the bottom of triple effect shell side knockout drum is connected.

The waste heat utilizing drying machine the most according to claim 7 is evaporated the system concentrated, it is characterised in that: described One, two, three-effect heat exchanger and described condenser are many backhauls baffle pipe shell heat exchanger.