CN112915563A - Efficient energy-saving evaporation system for corn soaking liquid - Google Patents
Efficient energy-saving evaporation system for corn soaking liquid Download PDFInfo
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- CN112915563A CN112915563A CN202110261922.8A CN202110261922A CN112915563A CN 112915563 A CN112915563 A CN 112915563A CN 202110261922 A CN202110261922 A CN 202110261922A CN 112915563 A CN112915563 A CN 112915563A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B30/02—Preparatory treatment, e.g. crushing of raw materials or steeping process
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
Abstract
The invention provides a high-efficiency energy-saving evaporation system for corn steep liquor, which comprises a one-effect evaporator, a two-effect evaporator, a three-effect evaporator and a condenser, wherein the air inlet of the one-effect evaporator is communicated with a pipe bundle secondary waste gas collecting pipeline, the feed inlet of the one-effect evaporator is communicated with a corn steep liquor collecting tank, the air outlet of the one-effect evaporator is communicated with the air inlet of the two-effect evaporator, the air outlet of the two-effect evaporator is communicated with the air inlet of the three-effect evaporator, the discharge outlet of the one-effect evaporator is communicated with the feed inlet of the three-effect evaporator, the discharge outlet of the two-effect evaporator is communicated with corn steep liquor drying equipment, the corn steep liquor is evaporated and concentrated by using pipe bundle secondary waste gas generated in the drying process of corn germ and corn fiber separated in the corn starch processing process, so that heat in raw steam and condensed water in a, the purposes of saving energy and reducing cost are achieved.
Description
Technical Field
The invention relates to the technical field of corn starch production equipment, in particular to a high-efficiency energy-saving corn soaking solution evaporation system for evaporating and concentrating corn soaking solution by using tube bundle secondary waste gas generated when corn germs and corn fibers separated in a corn starch production process are dried by a tube bundle dryer.
Background
The corn starch industry has developed into a new worldwide industry, China is a big country of the corn processing industry, the corn starch yield reaches 2600 million tons every year in China, the corn wet milling industry develops rapidly, and each part of grains can be effectively separated to produce high-purity starch and byproducts. The processing method for producing the corn starch by the wet method comprises the following steps: soaking, coarse grinding, fine grinding (to germ extraction \ fiber separation), protein separation, starch washing, starch drying and the like to obtain a high-purity starch product. Corn steep liquor is a by-product produced when corn is used for producing starch by a wet method. Before the starch is prepared, the corn kernels need to be soaked, and the liquid obtained after soaking is the corn soaking liquid. The mechanical strength of the corn kernel can be reduced by soaking, the connection among cortex, germ and endosperm and between starch and protein is weakened, and the corn kernel expands after absorbing water, so that the corn kernel can be separated more easily. The corn soaking solution contains certain nitrogen source, fermentable sugar, auxin, nucleic acid, inorganic salt and other substances, and can provide nutrition for the growth and metabolism of microorganisms. However, the corn steep liquor generated by the corn starch production process contains excessive sulfite, so that the corn steep liquor cannot be directly fed to animals, most factories cannot fully utilize the components in the corn steep liquor to serve as waste water to be directly discharged into the environment, and the corn steep liquor is acidic high-concentration organic waste water, so that the treatment difficulty is high, the cost is high, and the discharge of the corn steep liquor serving as the waste water wastes resources and causes great pollution to the environment.
At present, the corn soaking solution is mainly used for producing feed by drying and concentrating the corn soaking solution, a large amount of steam and heat are consumed for drying the corn soaking solution, and great economic burden is brought to enterprises at present when energy is increasingly tense. The germ and the corn fiber separated in the corn starch processing process need to be dried by a tube bundle dryer, secondary waste gas of the tube bundle generated in the drying process is directly discharged into the atmosphere by a fan after passing through a cyclone dust collector, the secondary waste gas has a high temperature of 90-110 ℃, the secondary waste gas is directly discharged, a large amount of waste heat is not utilized, and great energy waste is caused.
Disclosure of Invention
In summary, in order to overcome the defects of the prior art, the invention provides an efficient and energy-saving evaporation system for corn steep liquor, which utilizes secondary waste gas of a tube bundle generated in the drying process of corn germ and corn fiber separated in the corn starch processing process to evaporate and concentrate the corn steep liquor, so that the drying and concentration of the corn steep liquor can be realized only by utilizing the waste gas without utilizing raw steam or heat in condensed water in a tube bundle dryer, and the purposes of saving energy and reducing cost are achieved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an energy-efficient vaporization system of maize soak solution, wherein: the device comprises a first-effect evaporator, a second-effect evaporator, a third-effect evaporator and a condenser, wherein an air inlet of the first-effect evaporator is communicated with a tube bundle secondary waste gas collecting pipeline, a feed inlet of the first-effect evaporator is communicated with a corn soaking liquid collecting tank, an air outlet of the first-effect evaporator is communicated with an air inlet of the second-effect evaporator, an air outlet of the second-effect evaporator is communicated with an air inlet of the third-effect evaporator, a discharge outlet of the first-effect evaporator is communicated with a feed inlet of the third-effect evaporator, a discharge outlet of the third-effect evaporator is communicated with corn steep liquor drying equipment, an air outlet of the third-effect evaporator is communicated with an air inlet of the condenser, an air outlet of the condenser is communicated with an air inlet of a vacuum pump, an air outlet of the vacuum pump is emptied, the tube bank secondary waste gas that produces among the drying process of one effect evaporimeter utilization maize germ and corn fibre carries out evaporative concentration for the first time to the maize soak solution, the steam that the triple effect evaporimeter utilized the evaporative separation of two effect evaporimeters carries out evaporative concentration for the second time to the maize soak solution, the double effect evaporimeter utilize the steam that the evaporative separation of one effect evaporimeter and the tube bank secondary waste gas after the use of one effect evaporimeter to carry out evaporative concentration for the third time to the maize soak solution.
The technical scheme of the invention can also be realized in such a way that the one-effect evaporator and the three-effect evaporator have the same structure and respectively comprise a heater, a separator and a circulating pump, the discharge port of the heater is communicated with the feed port of the separator, the discharge port of the separator and the circulating discharge port of the heater are communicated with the feed port of the circulating pump, the discharge port of the circulating pump is communicated with the circulating feed port of the heater, the air inlet of the heater of the first-effect evaporator is communicated with the tube bundle secondary waste gas collecting pipeline, the feed port of the heater of the first-effect evaporator is communicated with the corn soak solution collecting tank, the air outlet of the heater of the first-effect evaporator and the air outlet of the separator of the first-effect evaporator are communicated with the air inlet of the second-effect evaporator, the discharge port of the circulating pump of the first-effect evaporator is communicated with the feed port of the heater of the third-effect.
The technical scheme of the invention can also be realized in such a way that the double-effect evaporator comprises a double-effect heater A, a double-effect heater B, a double-effect separator, a double-effect circulating pump A and a double-effect circulating pump B, wherein the air inlet of the double-effect heater A is communicated with the air outlet of the heater of the single-effect evaporator, the circulating discharge hole of the double-effect heater A is communicated with the feed inlet of the double-effect heater A, the discharge hole of the double-effect circulating pump A is communicated with the feed inlet of the double-effect separator, the air inlet of the double-effect heater B is communicated with the air outlet of the separator of the single-effect evaporator, the circulating discharge hole of the double-effect heater B is communicated with the feed inlet of the double-effect circulating pump B, the discharge hole of the double-effect heater B is communicated with the feed inlet of the double-effect separator, the discharge hole of the double-, the discharge hole of the two-effect circulating pump B is respectively communicated with the circulating feed hole of the two-effect heater B and the feed hole of the two-effect heater A through pipelines, the feed hole of the two-effect heater B is communicated with the discharge hole of the circulating pump of the three-effect evaporator through pipelines, and the discharge hole of the two-effect circulating pump A is communicated with the corn steep liquor drying equipment through a discharge pipeline.
The technical scheme of the invention can also be realized in such a way that the air outlet of the double-effect heater A is communicated with the air inlet of the corn feeding water heat exchanger, the air outlet of the corn feeding water heat exchanger is communicated with the air inlet of the induced draft fan, the water inlet of the corn feeding water heat exchanger is communicated with the corn feeding water source, and the water outlet of the corn feeding water heat exchanger is communicated with the corn soaking equipment.
The technical scheme of the invention can also be realized by that the air outlet of the induced draft fan is communicated with the air inlet of the heating heat exchanger, the air outlet of the heating heat exchanger is emptied, the water inlet of the heating heat exchanger is communicated with a water source, the water outlet of the heating heat exchanger is communicated with heating and bathing equipment in a dormitory of workers, and the condensed water outlet of the heating heat exchanger is communicated with the water inlet of the condensed water tank A.
The technical scheme of the invention can also be realized in such a way that a condensed water outlet of a heater of the first-effect evaporator is communicated with a condensed water inlet of a second-effect heater A of the second-effect evaporator, a condensed water outlet of the second-effect heater A of the second-effect evaporator is communicated with a condensed water inlet of a corn feeding water heat exchanger, a condensed water outlet of the corn feeding water heat exchanger is communicated with a water inlet of a condensed water tank A, and a water outlet of the condensed water tank A is communicated with a sewage treatment system through a condensed water pump A.
The technical scheme of the invention can also be realized in such a way that a condensed water outlet of a secondary heater B of the secondary evaporator is communicated with a condensed water inlet of a heater of the tertiary evaporator, a condensed water outlet of the heater of the tertiary evaporator is communicated with a condensed water inlet of a condenser, the condensed water outlet of the condenser is communicated with a water inlet of a condensed water tank B, a water outlet of the condensed water tank B is communicated with a water inlet of a condensed water pump B, and a water outlet of the condensed water pump B is communicated with a sewage treatment system.
The invention has the beneficial effects that:
1. according to the invention, the corn steep liquor is evaporated and concentrated by using the secondary waste gas of the tube bundle generated in the drying process of the corn germ and the corn fiber separated in the corn starch processing process, so that the drying and concentration of the corn steep liquor can be realized by using the waste gas without using raw steam or heat in condensed water in a tube bundle dryer, and the purposes of saving energy and reducing cost are achieved.
2. The two-effect evaporator adopts two heaters, namely a two-effect heater A and a two-effect heater B, the two heaters share one separator, the two-effect heater A adopts the tube bundle secondary waste gas after the heat exchange of the heater of the one-effect evaporator, the waste heat in the tube bundle secondary waste gas is recycled again, the two-effect heater B adopts the steam heat separated by the separator of the one-effect evaporator to evaporate and concentrate corn soaking liquid, and the three-effect evaporator adopts the steam separated by the two-effect separator of the two-effect evaporator to evaporate and concentrate corn soaking liquid, so that the waste heat is fully utilized.
3. The pipe bundle secondary waste gas discharged by the two-effect heater A enters the corn feeding water heat exchanger, after the waste heat is recovered by the one-effect evaporator and the two-effect evaporator, the pipe bundle secondary waste gas exchanges heat with the corn feeding water again, the waste heat in the pipe bundle secondary waste gas is utilized to heat the corn feeding water, so that the corn feeding water reaches the soaking temperature required by corn soaking, the corn feeding water is not required to be heated by independently utilizing raw steam, the full recovery and utilization of the waste heat in the pipe bundle secondary waste gas are realized, and the energy consumption is saved.
4. The pipe bundle secondary waste gas discharged by the corn feeding water heat exchanger enters the heating heat exchanger, and the waste heat in the pipe bundle secondary waste gas is utilized in the heating heat exchanger to heat the domestic water of workers, so that the waste heat recovery device can be used for heating, bathing and other facilities in a dormitory of workers, can recycle the waste heat of the pipe bundle secondary waste gas to the maximum extent, and can save energy.
5. The discharge port of a two-effect circulating pump A of a two-effect evaporator is communicated with corn steep liquor drying equipment through a discharge pipeline, corn steep liquor evaporated and concentrated by a one-effect evaporator firstly enters a three-effect evaporator for evaporation and concentration, then enters the two-effect evaporator for evaporation and concentration, secondary waste gas of a pipe bundle firstly passes through the one-effect evaporator, then passes through the two-effect evaporator and finally enters the three-effect evaporator, and then the temperature of the waste gas of the two-effect evaporator is inevitably higher than that of the waste gas of the three-effect evaporator. Because the corn steep liquor after evaporation concentration also needs a subsequent tube bundle drying process, the invention adopts the discharge of the double-effect evaporator to ensure that the temperature of the discharged corn steep liquor is about 70 ℃, thereby not only ensuring the temperature required by the subsequent tube bundle drying, but also avoiding unnecessary damage to a subsequent tube bundle dryer caused by overhigh temperature.
6. The corn starch waste heat recovery device is simple in structure, convenient to use and low in cost, waste gas generated in the corn starch production process is used for achieving evaporation concentration of corn soaking liquid and heating of corn feeding water, and raw steam is not needed, so that waste gas waste heat recovery and reutilization are effectively achieved, energy consumption is saved, and the corn starch production cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, an energy-efficient vaporization system of maize soak solution, including one effect evaporimeter 1, two effect evaporimeter 2, three effect evaporimeter 3 and condenser 4, one effect evaporimeter 1 utilize the tube bank secondary waste gas that produces in the drying process of maize germ and corn fibre to carry out evaporative concentration for the first time to the maize soak solution, three effect evaporimeter 3 utilize the steam of 2 evaporative separation of two effect evaporimeter to carry out evaporative concentration for the second time to the maize soak solution, two effect evaporimeter 2 utilize the steam of 1 evaporative separation of one effect evaporimeter and the tube bank secondary waste gas after 1 use of one effect evaporimeter to carry out evaporative concentration for the third time to the maize soak solution. The single-effect evaporator 1 and the triple-effect evaporator 3 have the same structure, the single-effect evaporator 1 comprises a single-effect heater 101, a single-effect separator 102 and a single-effect circulating pump 103, an air inlet of the single-effect heater 101 is communicated with a tube bundle secondary waste gas collecting pipeline 5, a feed inlet of the single-effect heater 101 is communicated with a corn steep liquor collecting tank 6, a feed valve 7 is arranged on a connecting pipeline for communicating a feed inlet of the single-effect heater 101 with the corn steep liquor collecting tank 6, a discharge outlet of the single-effect heater 101 is communicated with a feed inlet of the single-effect separator 102, a discharge outlet of the single-effect separator 102 and a circulating discharge outlet of the single-effect heater 101 are communicated with a feed inlet of the single-effect circulating pump 103, a discharge outlet of the single-effect circulating pump 103 is communicated with a circulating feed inlet of the single-effect heater 101, the triple-effect evaporator 3 comprises a triple-effect heater 301, a triple-effect separator 302 and a triple-effect, triple effect feed line 304 on be provided with triple effect feed valve 305, triple effect heater 301's discharge gate and triple effect separator 302's feed inlet intercommunication, triple effect separator 302's discharge gate and triple effect heater 301's circulation discharge gate intercommunication triple effect circulating pump 303's feed inlet, triple effect circulating pump 303's discharge gate intercommunication triple effect heater 301's circulation feed inlet, triple effect heater 301's air inlet intercommunication double effect separator 203's of double effect evaporator 2 gas outlet, triple effect separator 302's gas outlet intercommunication condenser 4's air inlet, condenser 4's gas outlet intercommunication vacuum pump 8's air inlet, vacuum pump 8's gas outlet evacuation.
The double-effect evaporator 2 comprises a double-effect heater A201, a double-effect heater B202, a double-effect separator 203, a double-effect circulating pump A204 and a double-effect circulating pump B205, the feed inlet of the double-effect heater B202 is communicated with the discharge outlet of a triple-effect circulating pump 303 through a double-effect feeding pipeline B206, a double-effect feeding valve B207 is arranged on the double-effect feeding pipeline B206, the discharge outlet of the double-effect heater B202 and the discharge outlet of the double-effect heater A201 are both communicated with the feed inlet of the double-effect separator 203, the circulating discharge outlet of the double-effect heater B202 and the discharge outlet of the double-effect separator 203 are communicated with the feed inlet of the double-effect circulating pump B205, the discharge outlet of the double-effect circulating pump B205 is communicated with the circulating feed inlet of the double-effect heater B202, the air inlet of the double-effect heater B202 is communicated with the air outlet of the single-effect separator 102, the air outlet of the double-effect separator 203 is communicated with the air inlet of, the double-effect feeding pipeline A208 is provided with a double-effect feeding valve A209, the air inlet of the double-effect heater A201 is communicated with the air outlet of the first-effect heater 101, the air outlet of the double-effect heater A201 is communicated with the air inlet of the corn feeding water heat exchanger 9, the circulating discharge hole of the double-effect heater A201 is communicated with the feed inlet of the double-effect circulating pump A204, the discharge hole of the double-effect circulating pump A204 is communicated with the circulating feed inlet of the double-effect heater A201 and corn steep liquor drying equipment, and the discharge hole of the double-effect circulating pump A204 is provided with a discharge valve 10 on a connecting pipeline connected with the corn.
The air outlet of the corn feeding water heat exchanger 9 is communicated with the air inlet of the induced draft fan 11, the water inlet of the corn feeding water heat exchanger 9 is communicated with a corn feeding water source, and the water outlet of the corn feeding water heat exchanger 9 is communicated with corn soaking equipment. The air outlet of the draught fan 11 is communicated with the air inlet of the heating heat exchanger 12, the air outlet of the heating heat exchanger 12 is emptied, the water inlet of the heating heat exchanger 12 is communicated with a water source, and the water outlet of the heating heat exchanger 12 is communicated with heating and bathing equipment in a dormitory of workers. The condensed water outlets of the heating heat exchangers 12 are respectively communicated with the water inlets of the condensed water tanks a13 through pipelines.
The condensed water outlet of the first-effect heater 101 is communicated with the condensed water inlet of the second-effect heater A201, the condensed water outlet of the second-effect heater A201 is communicated with the condensed water inlet of the corn feeding water heat exchanger 9, the condensed water outlet of the corn feeding water heat exchanger 9 is communicated with the water inlet of the condensed water tank A13, and the water outlet of the condensed water tank A13 is communicated with the sewage treatment system 17 through the condensed water pump A14.
The condensed water outlet of the double-effect heater B202 of the double-effect evaporator 2 is communicated with the condensed water inlet of the triple-effect heater 301, the condensed water outlet of the triple-effect heater 301 is communicated with the condensed water inlet of the condenser 4, the condensed water outlet of the condenser 4 is communicated with the water inlet of the condensed water tank B15, the water outlet of the condensed water tank B15 is communicated with the water inlet of the condensed water pump B16, and the water outlet of the condensed water pump B16 is communicated with the sewage treatment system 17. Condensed water generated by the two-effect heater B202 directly enters the three-effect heater 301, the inside of the three-effect heater 301 is in a negative pressure vacuum state under the action of the vacuum pump 8, the temperature of the boiling point of water in the three-effect heater 301 is reduced as the boiling point of the substance is increased along with the increase of the pressure and is reduced along with the reduction of the pressure, the temperature of the condensed water generated by the two-effect heater B202 is higher, after the condensed water at the temperature enters the three-effect heater 301, the temperature of the condensed water is higher than that of the boiling point of the water in the three-effect heater 301, the condensed water generated by the two-effect heater B202 enters the three-effect heater 301 to form flash evaporation, the flash evaporation steam also heats and concentrates the material in the three-effect heater 301, and similarly, the temperature of the condensed water generated by the three-effect heater 301 is higher, the flash evaporation phenomenon also occurs after entering the condenser 4, and the flash evaporation, thereby reducing the temperature of the condensed water entering the condensed water tank B15.
During use, pipe bundle secondary waste gas generated in the drying process of corn germs and corn fibers enters the pipe pass of the primary heater 101 along the pipe bundle secondary waste gas collecting pipeline 5, the feeding valve 7 is opened, corn soak solution in the corn soak solution collecting tank 6 enters the shell pass of the primary heater 101, the primary circulating pump 103 is started, the corn soak solution circularly flows in the primary heater 101 and the primary separator 102, heat exchange is carried out between the corn soak solution and the pipe bundle secondary waste gas in the primary heater 101, the corn soak solution absorbs the temperature of the pipe bundle secondary waste gas and then is heated, evaporated and concentrated, the evaporated and concentrated corn soak solution enters the primary separator 102 for gas-liquid separation, and the separated steam enters the secondary heater B202. Opening a three-effect feed valve 305, feeding corn soaking liquid evaporated and concentrated by a one-effect evaporator 1 into a shell pass of a three-effect heater 301 along a three-effect feed pipeline 304, feeding steam separated by a two-effect separator 203 of a two-effect evaporator 2 into a tube pass of the three-effect heater 301, circulating the corn soaking liquid in the three-effect heater 301 under the action of a three-effect circulating pump 303, carrying out secondary evaporation and concentration on the corn soaking liquid by using the steam separated by the two-effect separator 203, feeding the corn soaking liquid evaporated and concentrated by the three-effect heater 301 into a three-effect separator 302 for gas-liquid separation, feeding the separated steam into a condenser 4 for condensation, opening a two-effect feed valve B207, feeding the corn soaking liquid separated by the three-effect separator 302 into a shell pass of a two-effect heater B202, feeding the steam separated by the one-effect separator 102 into a tube pass of the two-effect heater B202, starting a two-effect circulating pump B205, and circulating the corn soaking liquid evaporated and concentrated by a three-effect evaporator 3 in the two-effect heater B202, the method comprises the steps of performing evaporation concentration on corn steep liquor for the third time by using steam separated by the first-effect separator 102, opening a second-effect feed valve A209, enabling pipe bundle secondary waste gas flowing out of the first-effect heater 101 to enter a pipe pass of the second-effect heater A201, enabling the corn steep liquor evaporated and concentrated by a second-effect heater B202 to enter a shell pass of the second-effect heater A201, starting a second-effect circulating pump A204, enabling the corn steep liquor to circularly flow in the second-effect heater A201 under the action of the second-effect circulating pump A204, performing evaporation concentration on the corn steep liquor for the fourth time by using the pipe bundle secondary waste gas flowing out of the first-effect heater 101, opening a discharge valve 10, concentrating the corn steep liquor evaporated and concentrated for the fourth time into corn steep liquor, and enabling the corn steep liquor to enter subsequent corn.
The secondary waste gas of the tube bundle flowing out from the gas outlet of the double-effect heater A201 enters the corn feeding water heat exchanger 9, then, in the heat exchanger, the waste heat of the secondary waste gas of the tube bundle is used for heating corn feeding water, the corn feeding water is heated and then enters the corn soaking equipment, then, under the action of the draught fan 11, the secondary waste gas of the tube bundle flowing out from the corn feeding water heat exchanger 9 enters the heating heat exchanger 12, and the secondary waste gas of the tube bundle is used for heating water in the heating heat exchanger 12 for workers to heat or/and bath. The secondary exhaust gas of the tube bundle after the heat is absorbed by the heating heat exchanger 12 is directly discharged, and the secondary exhaust gas of the tube bundle at the moment almost does not contain temperature. The condensed water generated by the corn feeding water heat exchanger 9 and the heating heat exchanger 12 enters the condensed water tank A13, and then enters the sewage treatment system 17 under the action of the condensed water pump A14.
Condensed water generated by cooling the secondary waste gas in the tube pass inner tube bundle of the first-effect heater 101 and condensed water generated by cooling the secondary waste gas in the tube pass inner tube bundle of the second-effect heater A201 enter a condensed water tank A13 and then enter the sewage treatment system 17 under the action of a condensed water pump A14.
Condensed water generated by the temperature reduction of the steam in the tube pass of the two-effect heater B202, the condensed water generated by the temperature reduction of the steam in the tube pass of the three-effect heater 301 and the condensed water generated by the temperature reduction of the steam in the tube pass of the condenser 4 enter a condensed water tank B15, and then enter the sewage treatment system 17 under the action of a re-condensed water pump B16.
The invention is provided with two sets of condensed water recovery systems, wherein the condensed water recovery system where the condensed water tank A13 and the condensed water pump A14 are located aims at the condensed water generated by the secondary waste gas of the tube bundle, the system can operate at normal pressure, the condensed water recovery system where the condensed water tank B15 and the condensed water pump B16 are located aims at the condensed water generated by the steam separated by the first-effect separator 102, the second-effect separator 203 and the third-effect separator 302, and the system needs to provide power for the flow of the steam, so the system needs to be connected with the vacuum pump 8 and needs to operate at negative pressure.
It should be noted that the above-mentioned embodiments illustrate rather than limit the technical solutions of the present invention, and that equivalent substitutions or other modifications made by those skilled in the art according to the prior art are all included within the scope of the claims of the present invention as long as they do not exceed the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The utility model provides a maize soak solution energy-efficient vaporization system which characterized in that: comprises a first-effect evaporator (1), a second-effect evaporator (2), a third-effect evaporator (3) and a condenser (4), wherein an air inlet of the first-effect evaporator (1) is communicated with a tube bank secondary waste gas collecting pipeline (5), a feed inlet of the first-effect evaporator (1) is communicated with a corn soak solution collecting tank (6), an air outlet of the first-effect evaporator (1) is communicated with an air inlet of the second-effect evaporator (2), an air outlet of the second-effect evaporator (2) is communicated with an air inlet of the third-effect evaporator (3), a discharge outlet of the first-effect evaporator (1) is communicated with a feed inlet of the third-effect evaporator (3), a discharge outlet of the third-effect evaporator (3) is communicated with a feed inlet of the second-effect evaporator (2), a discharge outlet of the second-effect evaporator (2) is communicated with corn slurry drying equipment, an air outlet of the third-effect evaporator (3) is communicated with an air, the gas outlet evacuation of vacuum pump (8), the water inlet of the comdenstion water export intercommunication condensate water pump B (16) of condenser (4), the delivery port intercommunication sewage treatment system (17) of condensate water pump B (16), one effect evaporimeter (1) utilize the pipe bundle secondary waste gas that maize germ and corn fiber's drying process produced to carry out evaporative concentration for the first time to the maize soak solution, three effect evaporimeter (3) utilize the steam of two effect evaporimeter (2) evaporative separation to carry out evaporative concentration for the second time to the maize soak solution, two effect evaporimeter (2) utilize the steam of one effect evaporimeter (1) evaporative separation and the pipe bundle secondary waste gas after one effect evaporimeter (1) uses to carry out evaporative concentration for the third time to the maize soak solution.
2. The corn steep liquor high-efficiency energy-saving evaporation system of claim 1, characterized in that: the single-effect evaporator (1) and the triple-effect evaporator (3) have the same structure and respectively comprise a heater, a separator and a circulating pump, a discharge port of the heater is communicated with a feed inlet of the separator, a discharge port of the separator and a circulating discharge port of the heater are communicated with a feed inlet of the circulating pump, a discharge port of the circulating pump is communicated with a circulating feed inlet of the heater, an air inlet of the heater of the single-effect evaporator (1) is communicated with a tube bundle secondary waste gas collecting pipeline (5), a feed inlet of the heater of the single-effect evaporator (1) is communicated with a corn soaking liquid collecting tank (6), an air outlet of the heater of the single-effect evaporator (1) and an air outlet of the separator of the single-effect evaporator (1) are communicated with an air inlet of the double-effect evaporator (2), a discharge port of the circulating pump of the single-effect evaporator, the air inlet of the heater of the triple-effect evaporator (3) is communicated with the air outlet of the double-effect evaporator (2).
3. The corn steep liquor high-efficiency energy-saving evaporation system of claim 1, characterized in that: the double-effect evaporator (2) comprises a double-effect heater A (201), a double-effect heater B (202), a double-effect separator (203), a double-effect circulating pump A (204) and a double-effect circulating pump B (205), wherein an air inlet of the double-effect heater A (201) is communicated with an air outlet of a heater of the single-effect evaporator (1), a circulating discharge outlet of the double-effect heater A (201) is communicated with a feed inlet of the double-effect circulating pump A (204), a discharge outlet of the double-effect circulating pump A (204) is communicated with a circulating feed inlet of the double-effect heater A (201), a discharge outlet of the double-effect heater A (201) is communicated with a feed inlet of the double-effect separator (203), an air inlet of the double-effect heater B (202) is communicated with an air outlet of a separator of the single-effect evaporator (1), a circulating discharge outlet of the double-effect heater B (202) is communicated with a feed inlet of the double-effect circulating pump B (205), a discharge outlet of the double, the discharge hole of the two-effect separator (203) is communicated with the feed hole of the two-effect circulating pump B (205), the discharge hole of the two-effect circulating pump B (205) is respectively communicated with the circulating feed hole of the two-effect heater B (202) and the feed hole of the two-effect heater A (201) through pipelines, the feed hole of the two-effect heater B (202) is communicated with the discharge hole of the circulating pump of the three-effect evaporator (3) through pipelines, and the discharge hole of the two-effect circulating pump A (204) is communicated with the corn steep liquor drying equipment through a discharge pipeline.
4. The corn steep liquor high-efficiency energy-saving evaporation system of claim 3, characterized in that: the air outlet of the double-effect heater A (201) is communicated with the air inlet of the corn feeding water heat exchanger (9), the air outlet of the corn feeding water heat exchanger (9) is communicated with the air inlet of the draught fan (11), the water inlet of the corn feeding water heat exchanger (9) is communicated with a corn feeding water source, and the water outlet of the corn feeding water heat exchanger (9) is communicated with corn soaking equipment.
5. The corn steep liquor high-efficiency energy-saving evaporation system of claim 4, characterized in that: the air outlet of the induced draft fan (11) is communicated with the air inlet of the heating heat exchanger (12), the air outlet of the heating heat exchanger (12) is emptied, the water inlet of the heating heat exchanger (12) is communicated with a water source, the water outlet of the heating heat exchanger (12) is communicated with heating and bathing equipment in a dormitory of workers, and the condensed water outlet of the heating heat exchanger (12) is communicated with the water inlet of the condensed water tank A (13).
6. The corn steep liquor high-efficiency energy-saving evaporation system of claim 3, characterized in that: the condensed water outlet of the heater of the first-effect evaporator (1) is communicated with the condensed water inlet of the second-effect heater A (201) of the second-effect evaporator (2), the condensed water outlet of the second-effect heater A (201) of the second-effect evaporator (2) is communicated with the condensed water inlet of the corn feeding water heat exchanger (9), the condensed water outlet of the corn feeding water heat exchanger (9) is communicated with the water inlet of a condensed water tank A (13), and the water outlet of the condensed water tank A (13) is communicated with a sewage treatment system (17) through a condensed water pump A (14).
7. The corn steep liquor high-efficiency energy-saving evaporation system of claim 3, characterized in that: the condensed water outlet of the double-effect heater B (202) of the double-effect evaporator (2) is communicated with the condensed water inlet of the heater of the triple-effect evaporator (3), the condensed water outlet of the heater of the triple-effect evaporator (3) is communicated with the condensed water inlet of the condenser (4), the condensed water outlet of the condenser (4) is communicated with the water inlet of the condensed water tank B (15), the water outlet of the condensed water tank B (15) is communicated with the water inlet of the condensed water pump B (16), and the water outlet of the condensed water pump B (16) is communicated with the sewage treatment system (17).
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