CN210229574U - Clean utilization system of waste heat in corn starch production - Google Patents
Clean utilization system of waste heat in corn starch production Download PDFInfo
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- CN210229574U CN210229574U CN201920782573.2U CN201920782573U CN210229574U CN 210229574 U CN210229574 U CN 210229574U CN 201920782573 U CN201920782573 U CN 201920782573U CN 210229574 U CN210229574 U CN 210229574U
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model relates to an exhaust heat recovery utilizes the field, in particular to used heat clean utilization system in cornstarch production, tube bank desiccator pass through the intake pipe and are connected with the scrubbing tower, and the waste liquid storage tank is connected to the scrubbing tower below, and the waste liquid storage tank passes through the pipeline to be connected with the circulating pump, and the right-hand heat exchanger that connects of circulating pump, heat exchanger right side below are connected with the flash vessel through the pipeline, and the heat exchanger upper right side is passed through the pipeline and is connected with the scrubbing tower. The utility model discloses utilize the scrubbing tower with the harmful gas in the waste gasSO2Etc. reduce SO2Corrosion effects on equipment; meanwhile, the waste heat is recycled by utilizing the heat exchange function of the heat exchange of the dry waste gas, the steam consumption in the corn steep liquor concentration process in the starch production is reduced, and the production cost is reduced.
Description
Technical Field
The utility model relates to a waste heat recovery of corn starch production facility utilizes the field, in particular to clean system of utilizing of used heat in corn starch production.
Background
Most of the starch production in the world takes corn as raw material, and accounts for more than 80% of the total starch production. At present, a wet process is mostly adopted in corn starch production at home and abroad, corn is subjected to impurity removal, then soaking, crushing, germ and fiber separation, protein separation, starch washing, drying and other processes to obtain a high-purity product, the separated germ and fiber are dried by a tube bundle dryer in the corn processing process, and a large amount of drying waste gas is generated in the drying process. But the apparatus cannot remove SO generated by the use of a sulfurous acid solution during the corn steeping process2SO in gases, waste gases2Causing corrosion to the evaporator.
Disclosure of Invention
In order to make up the deficiency of the prior art, the utility model provides a simple structure, convenient to use, can detach because the maize soaks the process and uses the sulfurous acid solution and produce SO2Clean utilization system of waste gas in the production of gaseous corn starch.
The utility model discloses a realize through following technical scheme:
the utility model provides a waste heat clean utilization system in cornstarch production which characterized in that: including the tube bank desiccator, the tube bank desiccator passes through the intake-tube connection of pipeline and scrubbing tower, the outlet of scrubbing tower passes through the pipe connection waste liquid storage tank, the inlet of the hot-fluid passageway of heat exchanger is connected through pipeline and circulating pump to the waste liquid storage tank, the export of the hot-fluid passageway of heat exchanger is connected with the water inlet of scrubbing tower, the entry of the cold fluid passageway of pure water cold water inlet pipe connection heat exchanger, the export and the flash vessel of the cold fluid passageway of heat exchanger are connected, the air inlet of the exit linkage evaporimeter of flash vessel. The exhaust pipe of the washing tower is connected with equipment of the next working procedure.
A spray pipe, a liquid guiding device and a liquid cut-off device are arranged in the washing tower;
the spray pipe is fixed at the upper part inside the washing tower, a large number of atomizing spray heads are uniformly arranged on the spray pipe, and spray condensate water is used for washing and absorbing SO2 in waste gas and cooling the waste gas;
the liquid guide device comprises a circle of downward inclined plane and a circle of upward inclined plane which are fixed on the inner wall of the washing tower, the upward inclined plane is positioned below the downward inclined plane, and the edges of the two inclined planes are connected and fixed together; the upward inclined surface is used for guiding the flue gas to flow obliquely upwards, and the downward inclined surface is used for guiding the water to flow obliquely downwards;
the liquid cut-off device is funnel-shaped and is positioned in the middle of the washing tower, the upper opening of the liquid cut-off device corresponds to the lower edge of the inclined plane which inclines downwards and is used for receiving water, the lower opening of the liquid cut-off device is connected with a guide pipe which inclines downwards, the guide pipe is fixed on the washing tower, and the opening of the guide pipe is connected with a waste liquid storage tank through a pipeline.
And a liquid discharge pipe and a water discharge valve are arranged at the bottom of the waste liquid storage tank, and when the concentration of the sulfurous acid solution in the waste liquid storage tank reaches a specified value, the waste liquid is discharged.
The exhaust pipe of the washing tower is connected with the air inlet of the alkaline washing tower, the alkaline washing tower is connected with the clear water pipe, the alkaline liquid pipe and the decontamination water treatment pipe through the circulating pipe and the acid and alkali resistant pump, and the circulating pipe is connected with the spray pipe in the alkaline washing tower.
The circulating pump adopts a centrifugal pump.
The utility model has the advantages that: SO produced during the corn steeping process using a sulfurous acid solution2Gas, using washing tower to remove harmful gas SO from waste gas2Etc. reduce SO2The corrosion to the evaporator and other equipment, the emission of harmful gas is avoided, and clean production is realized. The circulation utilization of the dry waste gas is realized through the power action of the circulating pump. The drying waste gas in the tube bundle dryer in the starch production process is fully utilized, the heat exchange effect of the heat exchanger is utilized for the drying waste gas, the heat in the drying waste gas is collected, the drying waste gas is used for the corn steep liquor concentration evaporator, the cyclic utilization of waste heat is realized, the steam energy consumption in the corn steep liquor concentration process is reduced, and the production cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention. FIG. 2 is a schematic view of the inside of a washing column.
Wherein: the device comprises a tube bundle dryer 1, a washing tower 2, a waste liquid storage tank 3, a circulating pump 4, a pure water cold water inlet pipe 5, a heat exchanger 6 and a flash evaporator 7. 8 shower, 9 atomizer, the inclined plane of 10 downward slopes, 11 liquid cut-off equipment, 12 honeycomb ducts, the inclined plane of 13 tilt up, 14 evaporimeters, 15 exhaust treatment device, 16 acid and alkali-resistance's pump, 17 sewage treatment pipes, 18 clean water pipes, 19 alkali liquor pipes, 20 circulating pipes.
Detailed Description
The attached drawing is a concrete embodiment of the utility model.
The utility model provides a waste heat clean utilization system in cornstarch production which characterized in that: including tube bank desiccator 1, tube bank desiccator 1 passes through the intake-tube connection of pipeline and scrubbing tower 2, the outlet of scrubbing tower 2 passes through pipe connection waste liquid storage tank 3, waste liquid storage tank 3 passes through the entry of pipeline and the hot-fluid passageway of circulating pump 4 connection heat exchanger 6, the export of the hot-fluid passageway of heat exchanger 6 is connected with the water inlet of scrubbing tower 2, the entry of the cold fluid passageway of heat exchanger 6 is connected to pure water cold water inlet tube 5, the export of the cold fluid passageway of heat exchanger 6 is connected with flash vessel 7, the exit linkage evaporimeter 14's of flash vessel air inlet.
The exhaust pipe of the washing tower is connected with the air inlet of the alkaline washing tower, the alkaline washing tower 15 is connected with a clear water pipe 18, an alkaline liquid pipe 19 and a decontamination water treatment pipe 17 through a circulating pipe 20 and an acid-alkali resistant pump 16, and the circulating pipe is connected with a spray pipe in the alkaline washing tower 15.
The waste gas which cannot be absorbed in the washing tower 2 is discharged from an exhaust port and is led to an alkaline washing tower 15 of the next step of process through a pipeline for treatment, the process is to add water and alkali liquor to the waste gas for washing, the water and the alkali liquor are recycled through an acid-alkali-resistant pump 16, the water and the alkali liquor flow to a sewage treatment device through a decontamination water treatment pipe 17 after reaching a certain PH value, and the treated waste gas is emptied after reaching the requirement of a discharge standard.
A spray pipe 8, a liquid guiding device and a liquid cut-off device are arranged in the washing tower;
the spray pipe 8 is fixed at the upper part inside the washing tower, a large number of atomizing spray heads 9 are uniformly arranged on the spray pipe, and spray condensate water is used for washing and absorbing SO2 in the waste gas and cooling the waste gas;
the liquid guiding device comprises a circle of downward inclined plane 10 and a circle of upward inclined plane 13 which are fixed on the inner wall of the washing tower, the upward inclined plane is positioned below the downward inclined plane, and the edges of the two inclined planes are connected and fixed together; the upward inclined surface is used for guiding the flue gas to flow obliquely upwards, and the downward inclined surface is used for guiding the water to flow obliquely downwards;
the liquid cut-off device 11 is funnel-shaped and is positioned in the middle of the washing tower, the upper opening of the funnel-shaped liquid cut-off device corresponds to the lower edge of the inclined plane which inclines downwards and is used for receiving water, the lower opening of the funnel-shaped liquid cut-off device is connected with the guide pipe 12 which inclines downwards, the guide pipe is fixed on the washing tower, and the opening of the guide pipe is connected with the waste liquid storage tank through a pipeline.
And a liquid discharge pipe and a water discharge valve are arranged at the bottom of the waste liquid storage tank, and when the concentration of the sulfurous acid solution in the waste liquid storage tank reaches a specified value of 0.3-0.5%, the waste liquid is discharged.
The circulating pump adopts a centrifugal pump.
The washing tower is connected with the tube bundle drying machine through the air inlet pipe, the washing tower is connected with the waste liquid storage tank through the drain pipe, the waste liquid storage tank is connected with the circulating pump through the water outlet pipe, the circulating pump returns to the washing tower again through the heat exchanger through a pipeline, and the condensed water is used for washing SO in the waste gas2。
The heat exchanger is connected with a cold water inlet pipe and a washing steam inlet pipe, cold water and hot water enter the flash evaporator through the water outlet pipe under the heat exchange action, the cold water and the hot water are used for the evaporator through the flash evaporation action, and condensed water returns to the washing tower through the water outlet pipe and is used for washing waste steam.
The waste liquid storage tank is used for temporarily storing the sulfurous acid solution, and the sulfurous acid solution reaches a certain concentration and is discharged through the liquid discharge pipe. The sulfurous acid solution may be tested for concentration on a regular basis, such as once or twice a day, or once every few days.
The specific process of the waste gas cleaning and utilizing system in the production of the corn starch comprises the following steps: high-temperature waste gas generated in the drying process of corn germ and fiber tube bundle enters a washing tower 2 from a tube bundle dryer 1 through an air inlet pipeline, the high-temperature waste gas is washed by cold condensate water in the washing tower 2, SO2 in the waste gas reacts with water to form sulfurous acid solution, the sulfurous acid solution enters a waste liquid storage tank 3, the rest high-temperature waste gas and waste water enters a heat exchanger 6 under the action of a circulating pump 4, pure water enters the heat exchanger 6 through a pure water cold water inlet pipe 5, the pure water cold water and the high-temperature waste gas and waste water are subjected to heat exchange in the heat exchanger 6, the pure water cold water is changed into hot water and enters a flash evaporator 7, the high-temperature waste gas and waste water are changed into condensed water through the heat exchanger 6 and then returned to the washing tower through a pipeline for waste gas washing, and the sulfurous acid in the waste liquid storage tank 3 is discharged through a liquid discharge pipe when reaching a certain concentration.
The utility model discloses utilize scrubbing action of scrubbing tower SO in with dry waste gas2The waste gas is removed, the clean utilization of the waste gas is realized, the heat in the dry waste gas is collected through the heat exchange effect of the heat exchanger, the waste gas is used for the corn steep liquor concentration evaporator, the energy consumption of the starch production is reduced, and the concentration of the corn steep liquor is realized in the processAnd cleaning and utilizing the waste gas.
Claims (5)
1. The utility model provides a waste heat clean utilization system in cornstarch production which characterized in that: including the tube bank desiccator, the tube bank desiccator passes through the intake-tube connection of pipeline and scrubbing tower, the outlet of scrubbing tower passes through the pipe connection waste liquid storage tank, the inlet of the hot-fluid passageway of heat exchanger is connected through pipeline and circulating pump to the waste liquid storage tank, the export of the hot-fluid passageway of heat exchanger is connected with the water inlet of scrubbing tower, the entry of the cold fluid passageway of pure water cold water inlet pipe connection heat exchanger, the export and the flash vessel of the cold fluid passageway of heat exchanger are connected, the air inlet of the exit linkage evaporimeter of flash vessel.
2. The clean utilization system for waste heat in corn starch production as claimed in claim 1, wherein: a spray pipe, a liquid guiding device and a liquid cut-off device are arranged in the washing tower;
the spray pipe is fixed at the upper part inside the washing tower, a large number of atomizing spray heads are uniformly arranged on the spray pipe, and spray condensate water is used for washing and absorbing SO2 in waste gas and cooling the waste gas;
the liquid guide device comprises a circle of downward inclined plane and a circle of upward inclined plane which are fixed on the inner wall of the washing tower, the upward inclined plane is positioned below the downward inclined plane, and the edges of the two inclined planes are connected and fixed together; the upward inclined surface is used for guiding the flue gas to flow obliquely upwards, and the downward inclined surface is used for guiding the water to flow obliquely downwards;
the liquid cut-off device is funnel-shaped and is positioned in the middle of the washing tower, the upper opening of the liquid cut-off device corresponds to the lower edge of the inclined plane which inclines downwards and is used for receiving water, the lower opening of the liquid cut-off device is connected with a guide pipe which inclines downwards, the guide pipe is fixed on the washing tower, and the opening of the guide pipe is connected with a waste liquid storage tank through a pipeline.
3. The clean utilization system for waste heat in corn starch production as claimed in claim 1, wherein: and a liquid discharge pipe and a water discharge valve are arranged at the bottom of the waste liquid storage tank, and when the concentration of the sulfurous acid solution in the waste liquid storage tank reaches a specified value, the waste liquid is discharged.
4. The clean utilization system for waste heat in corn starch production as claimed in claim 1, wherein: the exhaust pipe of the washing tower is connected with the air inlet of the alkaline washing tower, the alkaline washing tower is connected with the clear water pipe, the alkaline liquid pipe and the decontamination water treatment pipe through the circulating pipe and the acid and alkali resistant pump, and the circulating pipe is connected with the spray pipe in the alkaline washing tower.
5. The clean utilization system for waste heat in corn starch production as claimed in claim 1, wherein: the circulating pump adopts a centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920782573.2U CN210229574U (en) | 2019-05-28 | 2019-05-28 | Clean utilization system of waste heat in corn starch production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920782573.2U CN210229574U (en) | 2019-05-28 | 2019-05-28 | Clean utilization system of waste heat in corn starch production |
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| CN210229574U true CN210229574U (en) | 2020-04-03 |
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| CN201920782573.2U Active CN210229574U (en) | 2019-05-28 | 2019-05-28 | Clean utilization system of waste heat in corn starch production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413651A (en) * | 2021-12-31 | 2022-04-29 | 肇庆焕发生物科技有限公司 | Waste heat recycling system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413651A (en) * | 2021-12-31 | 2022-04-29 | 肇庆焕发生物科技有限公司 | Waste heat recycling system and method |
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Denomination of utility model: A clean utilization system of waste heat in corn starch production Effective date of registration: 20210308 Granted publication date: 20200403 Pledgee: Agricultural Bank of China Limited Leling City sub branch Pledgor: SHANDONG ZHONGGU STARCH SUGAR Co.,Ltd. Registration number: Y2021980001520 |