Baijiu vinasse and high-concentration wastewater comprehensive recovery system

Abstract

The application discloses a kind of liquor vinasse and high-concentration wastewater comprehensive recovery system, including tube bundle dryer, steam source, mixing auger, feed auger, multi-effect evaporation system, surface condenser, wastewater collection tank and vacuum pump, steam source provides steam for tube bundle dryer, tube bundle dryer is used to dry the mixture of vinasse and high-concentration wastewater after evaporation concentration, after washing, waste gas is transported to multi-effect evaporation system, and multi-effect evaporation system uses the waste gas after washing as heat source to evaporate and concentrate liquor high-concentration wastewater, and mixing auger is used to mix vinasse and concentrated liquor high-concentration wastewater.The application uses the waste gas generated when drying vinasse by tube bundle dryer as heat source to concentrate liquor high-concentration wastewater, and after mixing the concentrated wastewater thick slurry and vinasse, they are dried together in tube bundle dryer, and after crushing, the dried vinasse can be used to produce feed and the like, so as to realize the recycling of vinasse and high-concentration wastewater in liquor production process.

Description

Technical Field

[0001] This invention relates to the field of waste recycling technology generated during the brewing process, specifically to a comprehensive recycling system for baijiu lees and high-concentration wastewater. Background Technology

[0002] In the production of baijiu (Chinese liquor), after the fermented mash is distilled to produce baijiu, a protein-rich residue remains. This residue is separated into two parts: filter residue and filtrate. Due to the action of microorganisms, the filter residue contains a large amount of protein, B vitamins, and amino acids, as well as unknown growth-promoting factors produced during fermentation. Similarly, the filtrate separated from the filter residue also contains a large amount of nutrients.

[0003] Baijiu wastewater refers to the wastewater generated during the production of baijiu. It mainly includes cooling water from the brewing workshop, rinsing water from distillation equipment, cellar bottom water, seepage water from fermentation tanks, leakage water from underground storage facilities, water from blind drains in fermentation tanks, and various cleaning and rinsing water. Baijiu wastewater can be divided into two parts according to its pollution level. One part is high-concentration wastewater, which contains very high concentrations of organic matter. This mainly refers to cellar bottom water, water from blind drains in fermentation tanks, floor rinsing water from the distillation section, seepage water from fermentation tanks, leakage water from underground storage facilities, and raw material rinsing and soaking discharge water from the "Xia Sha" and "Cao Sha" processes. Its COD can reach approximately 100,000 mg / L, BOD can reach 44,000 mg / L, and its pH is acidic. Among these, cellar bottom water is the most significant high-concentration wastewater, containing the largest amount of organic matter and the highest concentration of pollutants. The remaining baijiu wastewater is low-concentration wastewater, with pollutant concentrations far below national emission standards, and can be discharged directly. High-concentration wastewater is characterized by high concentrations of organic pollutants, good biodegradability, and easy biodegradability. Direct discharge of such wastewater not only pollutes the environment but also causes the loss of nutrients.

[0004] Currently, for liquor producers, the lees produced during the liquor production process are usually dried and used to produce animal feed. However, the filtrate and high-concentration wastewater from the lees are usually sent directly to wastewater treatment plants for purification. The treatment cost for one ton of wastewater is usually nearly 100 yuan, which is high and a heavy burden on enterprises. Summary of the Invention

[0005] In summary, to overcome the shortcomings of existing technologies, this invention provides a comprehensive recycling system for baijiu lees and high-concentration wastewater. It utilizes a tube bundle dryer to dry the lees, and then uses the secondary steam generated by the tube bundle dryer as a heat source to concentrate the high-concentration baijiu wastewater. The concentrated wastewater slurry is mixed with the lees and then fed into the tube bundle dryer for further drying. The dried lees, after being crushed, can be used to produce animal feed, etc., thereby realizing the recycling and reuse of lees and high-concentration wastewater during baijiu production.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A comprehensive recycling system for baijiu (Chinese liquor) lees and high-concentration wastewater includes: a tube bundle dryer, a steam source, a mixing auger, a feeding auger, a drying condensate collection tank, a waste gas scrubbing device, an induced draft fan, a multi-effect evaporation system, a surface condenser, a wastewater collection tank, and a vacuum pump.

[0008] A steam source provides steam to the tube bundle dryer, and the steam source is connected to the air inlet of the tube bundle dryer through a steam inlet pipeline.

[0009] A tube bundle dryer is used to dry a mixture of distiller's grains and high-concentration wastewater after evaporation and concentration. The exhaust outlet of the tube bundle dryer is connected to the inlet of an exhaust gas scrubbing device via an exhaust gas pipeline. The feed inlet of the tube bundle dryer is connected to the outlet of a feeding auger. The condensate outlet of the tube bundle dryer is connected to a drying condensate collection tank via a drying condensate pipeline. The drying condensate collection tank is used to collect the condensate inside the tube bundles of the tube bundle dryer.

[0010] The waste gas scrubbing device is used to scrub the waste gas generated during the material drying process. The outlet of the waste gas scrubbing device is connected to the inlet of the induced draft fan through a pipeline. The outlet of the induced draft fan is connected to the inlet of the multi-effect evaporation system through an evaporation inlet pipeline. The scrubbed waste gas is pressurized by the induced draft fan and then sent to the multi-effect evaporation system.

[0011] The multi-effect evaporation system comprises multiple evaporators connected in series. It utilizes the waste gas from washing as a heat source to evaporate and concentrate high-concentration wastewater from liquor production. The inlet of the multi-effect evaporation system is connected to a wastewater collection tank via a wastewater pipeline. The outlet of the multi-effect evaporation system is connected to the inlet of a surface condenser, and the outlet of the surface condenser is connected to the inlet of a vacuum pump. The outlet of the vacuum pump is used for venting.

[0012] The mixing auger is used to mix distiller's grains with concentrated high-concentration wastewater from baijiu (Chinese liquor). The inlet of the mixing auger is connected to the outlet of the multi-effect evaporation system and the distiller's grains source, while the outlet of the mixing auger is connected to the inlet of the feeding auger.

[0013] The technical solution of the present invention can also be implemented as follows: a return auger is provided between the source of distiller's grains and the inlet of the mixing auger. The return auger is used to mix wet distiller's grains and dried distiller's grains. The inlet of the return auger is connected to the outlet of the tube bundle dryer. The outlet of the return auger is connected to the inlet of the mixing auger.

[0014] The technical solution of the present invention can also be implemented as follows: the discharge port of the tube bundle dryer is connected to the inlet of the discharge auger, and the discharge port of the discharge auger is connected to the inlet of the crusher and the return auger respectively.

[0015] The technical solution of the present invention can also be implemented as follows: the outlet of the dry condensate collection tank is connected to the boiler through a condensate delivery pump, and the exhaust port of the dry condensate collection tank is connected to the air inlet of the multi-effect evaporation system through a pipeline.

[0016] The technical solution of the present invention can also be implemented as follows: the exhaust gas scrubbing device includes a scrubbing tower and a scrubbing circulation pump. The air inlet of the scrubbing tower is connected to the exhaust gas outlet of the tube bundle dryer through an exhaust gas pipeline. The circulating water outlet of the scrubbing tower is connected to the water inlet of the scrubbing circulation pump. The water outlet of the scrubbing circulation pump is connected to the scrubbing nozzles inside the scrubbing tower through a circulating spray pipeline. The air outlet of the scrubbing tower is connected to the air inlet of the induced draft fan.

[0017] The technical solution of the present invention can also be implemented as follows: the steam source is connected to the cavity between the shell of the tube bundle dryer and the tube bundle through a gas replenishment pipeline.

[0018] The technical solution of the present invention can also be implemented as follows: The multi-effect evaporation system includes four evaporators connected in series, namely a first-effect evaporator, a second-effect evaporator, a third-effect evaporator, and a fourth-effect evaporator. All four evaporators are forced-circulation evaporators, including a heater, a separator, and a forced-circulation pump. The inlet of the separator is connected to the shell side of the heater, and the outlet of the separator and the outlet of the heater are connected to the inlet of the forced-circulation pump. The outlet of the forced-circulation pump is connected to the inlet of the heater.

[0019] The air inlet of the heater of the first-effect evaporator is connected to the air outlet of the induced draft fan and the air outlet of the dried condensate collection tank via an air inlet pipe. The air outlet of the heater of the first-effect evaporator is vented. The air outlet of the separator of the first-effect evaporator is connected to the air inlet of the heater of the second-effect evaporator. The air outlet of the separator of the second-effect evaporator is connected to the air inlet of the heater of the third-effect evaporator. The air outlet of the separator of the third-effect evaporator is connected to the air inlet of the heater of the fourth-effect evaporator. The air outlet of the separator of the fourth-effect evaporator is connected to the air inlet of the surface condenser.

[0020] The outlet of the wastewater collection tank is connected to the inlet of the heater of the four-effect evaporator through a wastewater pipeline. The outlet of the forced circulation pump of the four-effect evaporator is connected to the inlet of the forced circulation pump of the three-effect evaporator through a three-effect feed pipeline. The outlet of the forced circulation pump of the three-effect evaporator is connected to the inlet of the forced circulation pump of the two-effect evaporator through a two-effect feed pipeline. The outlet of the forced circulation pump of the two-effect evaporator is connected to the inlet of the forced circulation pump of the first-effect evaporator through a first-effect feed pipeline. The outlet of the forced circulation pump of the first-effect evaporator is connected to the inlet of the mixing auger through a discharge pipeline.

[0021] The technical solution of the present invention can also be implemented as follows: the condensate outlet of the heater of the first-effect evaporator is connected to the scrubbing tower of the waste gas scrubbing device through a pipeline; the condensate outlet of the heater of the second-effect evaporator, the condensate outlet of the heater of the third-effect evaporator, the condensate outlet of the heater of the fourth-effect evaporator and the condensate outlet of the surface condenser are connected to the evaporation condensate collection tank through a pipeline; and the outlet of the evaporation condensate collection tank is connected to the drainage system through a drainage pump.

[0022] 1. This invention utilizes a tube bundle dryer to dry the lees, and then uses the secondary steam generated by the tube bundle dryer as a heat source to concentrate the high-concentration wastewater from baijiu production. The concentrated wastewater slurry is mixed with the lees and then fed into the tube bundle dryer for further drying. The dried lees are then crushed and can be used to produce feed, etc., thereby realizing the recycling and reuse of lees and high-concentration wastewater in the baijiu production process.

[0023] 2. The exhaust gas discharged from the exhaust outlet of the tube bundle dryer of the present invention is washed by the exhaust gas scrubbing device and then enters the multi-effect evaporation system. The exhaust port of the drying condensate collection tank of the present invention is connected to the air inlet of the multi-effect evaporation system through a pipeline. The exhaust gas of the tube bundle dryer and the steam discharged from the drying condensate collection tank are used as heat sources to evaporate and concentrate the high-concentration wastewater of liquor. There is no need to provide live steam to the evaporation system. The live steam that can enter the tube bundle dryer can be fully utilized, energy can be fully utilized, energy consumption can be reduced, and production costs can be reduced.

[0024] 3. The discharge port of the tube bundle dryer of the present invention is equipped with a discharge auger for conveying dry distiller's grains. The return auger of the present invention can mix the dry distiller's grains dried by the tube bundle dryer with the wet distiller's grains provided by the distiller's grains source. The dry distiller's grains absorb the moisture of the wet distiller's grains, thereby reducing the moisture content of the conveyed distiller's grains. The mixed semi-dry distiller's grains are then mixed evenly with the high-concentration wastewater after evaporation and concentration in the mixing auger. After that, they enter the tube bundle dryer for drying under the action of the feeding auger. The setting of the return auger reduces the moisture content of the distiller's grains, which can effectively prevent the distiller's grains from sticking on the auger due to high humidity, making it convenient for feeding into the tube bundle dryer, and also improving the drying efficiency of the tube bundle dryer.

[0025] 4. The steam source of the present invention is connected to the cavity between the shell of the tube bundle dryer and the tube bundle through the gas supply pipeline. Through the gas supply pipeline, the live steam of the steam source can enter the multi-effect evaporation system through the inner cavity of the tube bundle dryer and the exhaust gas pipeline. When the exhaust gas of the tube bundle dryer is insufficient to meet the evaporation and concentration needs of the multi-effect evaporation system, the gas supply pipeline can be used to supplement the evaporation and concentration required by the multi-effect evaporation system.

[0026] 5. This invention uses a tube bundle dryer to dry the distiller's grains. The tube bundle dryer has the advantages of low steam consumption, high drying efficiency, and good drying effect. This invention uses a multi-effect evaporation system to evaporate and concentrate high-concentration wastewater. The multi-effect evaporation system is equipped with four forced circulation evaporators connected in series. It has a large evaporation area and can achieve evaporation and concentration with a small temperature difference between the heat source and the high-concentration wastewater. The heat source utilization rate is high. This invention has a simple structure, is easy to use, and has low cost. It can effectively recover nutrients from the distiller's grains and high-concentration wastewater in the process of liquor production. It can effectively reduce the amount of live steam used, reduce production costs, and reduce the burden on enterprises. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention. Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] like Figure 1As shown, a comprehensive recycling system for baijiu lees and high-concentration wastewater includes a tube bundle dryer 3, a steam source 1, a mixing auger 6, a feeding auger 5, a drying condensate collection tank 11, a waste gas scrubbing device, an induced draft fan 16, a multi-effect evaporation system, a surface condenser 22, a wastewater collection tank 17, and a vacuum pump 25. The steam source 1 provides steam to the tube bundle dryer 3. The steam source 1 is connected to the air inlet of the tube bundle dryer 3 through a steam inlet pipe 2. The steam source 1 is connected to the cavity between the shell and the tube bundle of the tube bundle dryer 3 through a make-up air pipe 35. A make-up air valve is provided on the make-up air pipe 35. The tube bundle dryer 3 is used to dry a mixture of distiller's grains and high-concentration wastewater after evaporation and concentration. The inlet of the tube bundle dryer 3 is connected to the outlet of the feed auger 5. The mixing auger 6 is used to mix distiller's grains and concentrated high-concentration wastewater from baijiu (Chinese liquor). The inlet of the mixing auger 6 is connected to the outlet of the multi-effect evaporation system and the distiller's grains source 10. The outlet of the mixing auger 6 is connected to the inlet of the feed auger 5. The outlet of the tube bundle dryer 3 is connected to the inlet of the discharge auger 8. The outlet of the discharge auger 8 is connected to the inlets of the pulverizer 9 and the return auger 7. The return auger 7 is used to mix wet distiller's grains and dried distiller's grains. The inlet of the return auger 7 is connected to the distiller's grains source 10 and the outlet of the tube bundle dryer 3. The outlet of the return auger 7 is connected to the inlet of the mixing auger 6. The condensate outlet of the tube bundle dryer 3 is connected to the drying condensate collection tank 11 through a drying condensate pipeline. The drying condensate collection tank 11 is used to collect the condensate inside the tube bundle of the tube bundle dryer 3. The outlet of the drying condensate collection tank 11 is connected to the boiler through a condensate delivery pump 12. The exhaust port of the drying condensate collection tank 11 is connected to the air inlet of the multi-effect evaporation system through a pipeline. The exhaust gas outlet 4 of the tube bundle dryer 3 is connected to the inlet of the exhaust gas scrubbing device through the exhaust gas pipeline 15. The exhaust gas scrubbing device is used to scrub the exhaust gas generated during the material drying process. The exhaust gas scrubbing device includes a scrubbing tower 13 and a scrubbing circulation pump 14. The inlet of the scrubbing tower 13 is connected to the exhaust gas outlet 4 of the tube bundle dryer 3 through the exhaust gas pipeline 15. The circulating water outlet of the scrubbing tower 13 is connected to the inlet of the scrubbing circulation pump 14. The outlet of the scrubbing circulation pump 14 is connected to the scrubbing nozzle inside the scrubbing tower 13 through the circulating spray pipeline. The exhaust outlet of the scrubbing tower 13 is connected to the inlet of the induced draft fan 16.The outlet of the induced draft fan 16 is connected to the inlet of the multi-effect evaporation system via an evaporation inlet pipe. The washed waste gas is pressurized by the induced draft fan 16 and then transported to the multi-effect evaporation system. This system uses the washed waste gas as a heat source to evaporate and concentrate high-concentration wastewater from the liquor production process. The multi-effect evaporation system includes four evaporators connected in series: a first-effect evaporator 18, a second-effect evaporator 19, a third-effect evaporator 20, and a fourth-effect evaporator 21. All four evaporators are forced-circulation evaporators, including a heater, a separator, and a forced-circulation pump. The inlet of the separator is connected to the shell side of the heater. The discharge port of the separator and the discharge port of the heater are connected to the inlet of the forced circulation pump. The discharge port of the forced circulation pump is connected to the inlet of the heater. The air inlet of the heater of the first-effect evaporator 18 is connected to the air outlet of the induced draft fan 16 and the air outlet of the dry condensate collection tank 11 via an air inlet pipe. The air outlet of the heater of the first-effect evaporator 18 is vented. The air outlet of the separator of the first-effect evaporator 18 is connected to the air inlet of the heater of the second-effect evaporator 19. The air outlet of the separator of the second-effect evaporator 19 is connected to the air inlet of the heater of the third-effect evaporator 20. The third-effect evaporator 20... The outlet of the separator 0 is connected to the inlet of the heater of the four-effect evaporator 21. The outlet of the separator of the four-effect evaporator 21 is connected to the inlet of the surface condenser 22. The outlet of the surface condenser 22 is connected to the inlet of the vacuum pump 25. The outlet of the vacuum pump 25 is vented. The outlet of the wastewater collection tank 17 is connected to the inlet of the heater of the four-effect evaporator 21 through the wastewater pipeline 34. The outlet of the forced circulation pump of the four-effect evaporator 21 is connected to the inlet of the forced circulation pump of the three-effect evaporator 20 through the three-effect feed pipeline 26. The three-effect feed pipeline 26 is equipped with a three-effect feed. Valve 27, the outlet of the forced circulation pump of the triple-effect evaporator 20 is connected to the inlet of the forced circulation pump of the second-effect evaporator 19 through the second-effect feed pipe 28, the second-effect feed pipe 28 is equipped with a second-effect feed valve 29, the outlet of the forced circulation pump of the second-effect evaporator 19 is connected to the inlet of the forced circulation pump of the first-effect evaporator 18 through the first-effect feed pipe 30, the first-effect feed pipe 30 is equipped with a first-effect feed valve 31, the outlet of the forced circulation pump of the first-effect evaporator 18 is connected to the inlet of the mixing auger 6 through the discharge pipe 32, the discharge pipe 32 is equipped with a discharge valve 33. The condensate outlet of the heater of the first-effect evaporator 18 is connected to the scrubbing tower 13 of the exhaust gas scrubbing device through a pipeline. The condensate outlets of the heaters of the second-effect evaporator 19, the third-effect evaporator 20, the fourth-effect evaporator 21, and the surface condenser 22 are connected to the evaporation condensate collection tank 23 through pipelines. The outlet of the evaporation condensate collection tank 23 is connected to the drainage system through a drainage pump 24.

[0030] In use, the wet distiller's grains collected by the distiller's grains source 10 also enter the return auger 7, then the mixing auger 6, and then the feed auger 5 into the space between the tube bundle and the shell of the tube bundle dryer 3. Live steam supplied by the steam source 1 enters the tube bundle dryer 3 and flows along the tube bundle. Inside the tube bundle dryer 3, the wet distiller's grains between the tube bundle and the shell exchange heat with the steam inside the tube bundle, evaporating the moisture and drying the wet distiller's grains into dry distiller's grains. The dry distiller's grains enter the discharge auger 8 from the outlet of the tube bundle dryer 3. The evaporated steam flows out from the exhaust outlet of the tube bundle dryer 3 and enters the exhaust gas scrubbing device along the exhaust gas outlet pipe. The scrubbed exhaust gas enters the heater of the first-effect evaporator 18 under the action of the induced draft fan 16. The steam flowing along the tube bundle of the tube bundle dryer 3 is cooled and condensed. The condensate enters the dry condensate collection tank 11. At this time, the temperature of the condensate is still relatively high. The condensate in the dry condensate collection tank 11 is formed by steam condensation and has a high degree of cleanliness. It can be directly entered into the boiler for reheating and generating steam under the action of the condensate transfer pump 12. Even with high water temperature, steam is still generated in the dry condensate collection tank 11. The steam discharged from the outlet of the dry condensate collection tank 11 also enters the heater of the first-effect evaporator 18. In the first-effect evaporator 18, the washing wastewater and the steam discharged from the dry condensate collection tank 11 heat the high-concentration wastewater together, causing the water in the high-concentration wastewater to evaporate and become concentrated. The evaporated steam enters the heater of the second-effect evaporator 19 as a heat source to evaporate and concentrate the high-concentration wastewater entering the second-effect evaporator 19. Similarly, the steam evaporated from the second-effect evaporator 19 enters the heater of the third-effect evaporator 20 as a heat source to evaporate and concentrate the high-concentration wastewater entering the third-effect evaporator 20. The steam evaporated from the third-effect evaporator 20 enters the heater of the fourth-effect evaporator 21 as a heat source to evaporate and concentrate the high-concentration wastewater entering the fourth-effect evaporator 21. The steam evaporated from the fourth-effect evaporator 21 enters the surface condenser 22 for condensation.

[0031] The high-concentration wastewater from baijiu collected in wastewater collection tank 17 first enters the quadruple-effect evaporator 21 along wastewater pipeline 34. In the heater of the quadruple-effect evaporator 21, the high-concentration wastewater from baijiu is concentrated for the first time using steam evaporated from the triple-effect evaporator 20. The concentrated wastewater from baijiu after evaporation in the quadruple-effect evaporator 21 then enters the triple-effect evaporator 20 along the triple-effect feed pipeline 26. In the triple-effect evaporator 20, the high-concentration wastewater from baijiu is concentrated for the second time using steam evaporated from the second-effect evaporator 19. The concentrated wastewater from baijiu after the second evaporation then enters the second-effect evaporator 1 along the second-effect feed pipeline 28. 9. In the second-effect evaporator 19, the steam evaporated from the first-effect evaporator 18 is used to perform a third evaporation and concentration of the high-concentration wastewater of liquor. After the third evaporation and concentration, the high-concentration wastewater of liquor enters the first-effect evaporator 18 through the first-effect feed pipe 30. In the first-effect evaporator 18, the exhaust gas discharged from the tube bundle dryer 3 and the steam discharged from the drying condensate collection tank 11 are used to perform a fourth evaporation and concentration of the high-concentration wastewater of liquor. After four evaporation and concentrations, the high-concentration wastewater of liquor is evaporated and concentrated into a wastewater slurry. The wastewater slurry enters the mixing auger 6 through the discharge pipe 32, thus completing the evaporation and concentration of the high-concentration wastewater of liquor.

[0032] The dried distiller's grains after drying in the tube bundle dryer 3 enter the discharge auger 8 from the discharge port of the tube bundle dryer 3. Part of the dried distiller's grains enters the crusher 9 for crushing and can be used for the production of distiller's grains protein feed. The other part of the dried distiller's grains enters the return auger 7. The wet distiller's grains collected by the distiller's grains source 10 also enter the return auger 7. In the return auger 7, the dry distiller's grains and wet distiller's grains are mixed and stirred evenly to form semi-dry distiller's grains, which are then conveyed to the mixing auger 6. In the mixing auger 6, the wastewater slurry is mixed evenly with the semi-dry distiller's grains conveyed from the return auger 7, and then conveyed to the tube bundle dryer 3 by the feed auger 5 for drying.

[0033] When the exhaust gas discharged from the tube bundle dryer 3 is insufficient to meet the evaporation needs of the multi-effect evaporation system, the gas supply valve on the gas supply line 35 can be opened. Part of the live steam generated by the steam source 1 enters the shell of the tube bundle dryer 3 directly from the gas supply line 35, and then enters the multi-effect evaporation system from its exhaust gas outlet through the exhaust gas line 15, the exhaust gas scrubbing device and the induced draft fan 16, providing sufficient heat source for the evaporation and concentration of the multi-effect evaporation system.

[0034] It should be noted that the above-described embodiments are illustrative of the technical solutions of the present invention and not limiting thereof. Equivalent substitutions or other modifications made by those skilled in the art based on the prior art, as long as they do not exceed the concept and scope of the technical solutions of the present invention, should be included within the scope of the claims of the present invention.

Claims

1. A comprehensive recycling system for baijiu (Chinese liquor) lees and high-concentration wastewater, characterized in that: The device comprises a tube bundle dryer (3), a steam source (1), a mixing auger (6), a feeding auger (5), a dry condensate collecting tank (11), a waste gas washing device, an induced draft fan (16), a multi-effect evaporation system, a surface condenser (22), a waste water collecting tank (17) and a vacuum pump (25), The steam source (1) provides steam for the tube bundle dryer (3), and is connected with the steam inlet of the tube bundle dryer (3) through a steam inlet pipeline (2). The tube bundle dryer (3) is used for drying the mixture of the wet distiller's grains and the high-concentration waste water after evaporation and concentration, the waste gas outlet (4) of the tube bundle dryer (3) is connected with the waste gas washing device through a waste gas pipeline (15), the feeding inlet of the tube bundle dryer (3) is connected with the discharging outlet of the feeding auger (5), the condensate outlet of the tube bundle dryer (3) is connected with the dry condensate collecting tank (11) through a dry condensate pipeline, and the dry condensate collecting tank (11) is used for collecting the condensate in the tube bundle of the tube bundle dryer (3). The waste gas washing device is used for washing the waste gas generated in the drying process of the material, and the waste gas outlet of the waste gas washing device is connected with the feeding inlet of the induced draft fan (16) through a pipeline, the waste gas outlet of the induced draft fan (16) is connected with the feeding inlet of the multi-effect evaporation system through an evaporation inlet pipeline, and the washed waste gas is transported to the multi-effect evaporation system through the induced draft fan (16) after being pressurized. The multi-effect evaporation system uses the washed waste gas as a heat source to evaporate and concentrate the high-concentration waste water of the liquor, and comprises four evaporators connected in series, namely, a first evaporator (18), a second evaporator (19), a third evaporator (20) and a fourth evaporator (21), the feeding inlet of the heater of the first evaporator (18) is connected with the waste gas outlet of the induced draft fan (16) and the waste water outlet of the dry condensate collecting tank (11) through an evaporation inlet pipeline, and the waste gas outlet of the heater of the first evaporator (18) is vented. The feeding inlet of the multi-effect evaporation system is connected with the waste water collecting tank (17) through a waste water pipeline (34), the waste gas outlet of the multi-effect evaporation system is connected with the feeding inlet of the surface condenser (22), the waste gas outlet of the surface condenser (22) is connected with the feeding inlet of the vacuum pump (25), and the waste gas outlet of the vacuum pump (25) is vented. The mixing auger (6) is used for mixing the wet distiller's grains and the high-concentration waste water of the liquor after concentration, the feeding inlet of the mixing auger (6) is connected with the discharging outlet of the multi-effect evaporation system and the distiller's grains source (10), and the discharging outlet of the mixing auger (6) is connected with the feeding inlet of the feeding auger (5). The steam source (1) is connected with the cavity between the shell and the tube bundle of the tube bundle dryer (3) through a gas supplement pipeline (35).

2. The Baijiu vinasse and high-concentration wastewater comprehensive recovery system according to claim 1, characterized in that: The feeding inlet of the mixing auger (6) is connected with the discharging outlet of the tube bundle dryer (3) and the distiller's grains source (10), and the feeding inlet of the mixing auger (6) is connected with the discharging outlet of the return auger (7). 3.The comprehensive recovery system of white spirit vinasse and high-concentration wastewater according to claim 2, characterized in that: The discharge port of the pipe bundle dryer (3) is communicated with the inlet port of the discharge auger (8), and the discharge port of the discharge auger (8) is connected with the inlet port of the grinder (9) and the inlet port of the return auger (7) respectively.

4. The white spirit vinasse and high-concentration wastewater comprehensive recovery system according to claim 1, characterized in that: The water outlet of the dry condensate collecting tank (11) is connected with the boiler through a condensate conveying pump (12), and the exhaust port of the dry condensate collecting tank (11) is connected with the air inlet of the multi-effect evaporation system through a pipeline.

5. The white spirit vinasse and high-concentration wastewater comprehensive recovery system according to claim 1, characterized in that: The waste gas washing device comprises a washing tower (13) and a washing circulating pump (14), the air inlet of the washing tower (13) is communicated with the waste gas outlet (4) of the pipe bundle dryer (3) through a waste gas pipeline (15), the circulating water outlet of the washing tower (13) is communicated with the water inlet of the washing circulating pump (14), the water outlet of the washing circulating pump (14) is communicated with the washing nozzle in the washing tower (13) through a circulating spray pipeline, and the air outlet of the washing tower (13) is communicated with the air inlet of an induced draft fan (16).

6. The white spirit vinasse and high-concentration wastewater comprehensive recovery system according to claim 1, characterized in that: The four evaporators of the multi-effect evaporation system are all forced circulation evaporators, comprising a heater, a separator and a forced circulation pump, the inlet of the separator is communicated with the shell side of the heater, the outlet of the separator and the outlet of the heater are communicated with the inlet of the forced circulation pump, and the outlet of the forced circulation pump is communicated with the inlet of the heater, The air outlet of the separator of the first-effect evaporator (18) is communicated with the air inlet of the heater of the second-effect evaporator (19), the air outlet of the separator of the second-effect evaporator (19) is communicated with the air inlet of the heater of the third-effect evaporator (20), the air outlet of the separator of the third-effect evaporator (20) is communicated with the air inlet of the heater of the fourth-effect evaporator (21), and the air outlet of the separator of the fourth-effect evaporator (21) is communicated with the air inlet of the surface condenser (22), The outlet of the waste water collecting tank (17) is communicated with the inlet of the heater of the fourth-effect evaporator (21) through a waste water pipeline (34), the outlet of the forced circulation pump of the fourth-effect evaporator (21) is communicated with the inlet of the forced circulation pump of the third-effect evaporator (20) through a third-effect feeding pipeline (26), the outlet of the forced circulation pump of the third-effect evaporator (20) is communicated with the inlet of the forced circulation pump of the second-effect evaporator (19) through a second-effect feeding pipeline (28), the outlet of the forced circulation pump of the second-effect evaporator (19) is communicated with the inlet of the forced circulation pump of the first-effect evaporator (18) through a first-effect feeding pipeline (30), and the outlet of the forced circulation pump of the first-effect evaporator (18) is communicated with the inlet of the mixing auger (6) through a discharge pipeline (32).

7. The white spirit vinasse and high-concentration wastewater comprehensive recovery system according to claim 6, characterized in that: The condensate outlet of the heater of the first-effect evaporator (18) is communicated with the washing tower (13) of the waste gas washing device through a pipeline, the condensate outlets of the heaters of the second-effect evaporator (19), the third-effect evaporator (20) and the fourth-effect evaporator (21) and the condensate outlet of the surface condenser (22) are communicated with an evaporation condensate collecting tank (23) through pipelines, and the water outlet of the evaporation condensate collecting tank (23) is communicated with a drainage system through a drainage pump (24).

Images