CN218410815U - Corn starch byproduct tube bundle drying waste gas waste heat recovery system - Google Patents
Corn starch byproduct tube bundle drying waste gas waste heat recovery system Download PDFInfo
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- CN218410815U CN218410815U CN202222192116.2U CN202222192116U CN218410815U CN 218410815 U CN218410815 U CN 218410815U CN 202222192116 U CN202222192116 U CN 202222192116U CN 218410815 U CN218410815 U CN 218410815U
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Abstract
The utility model discloses a dry waste gas waste heat recovery system of corn starch by-product tube bank, including one-level heat exchanger A, one-level heat exchanger B, second grade heat exchanger, one-level delivery pump A, one-level delivery pump B, second grade delivery pump, maize soak liquid storage tank and soak liquid delivery pump, the utility model discloses an utilize the concentrated system exhaust waste gas heating starch washing water and maize soaking water, soak starch washing water and maize and use water from normal atmospheric temperature heating to its required temperature, realize recycling waste gas waste heat to reduce energy consumption, reduction in production cost improves enterprise competitiveness.
Description
Technical Field
The utility model relates to a corn starch production facility technical field, concretely relates to retrieve corn starch by-product tube bank dry waste gas waste heat recovery system that dry waste gas waste heat of corn starch by-product tube bank used.
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.
The main byproducts produced in the production process of corn starch comprise corn steep liquor, corn germ, corn fiber and corn protein, wherein the corn steep liquor is prepared by evaporating and concentrating corn steep liquor and can be used for producing feed, the corn germ can be used for producing corn oil after being washed, dehydrated and dried, the corn fiber can be used for producing fiber powder after being dehydrated, the corn protein can be produced into protein powder after being concentrated and dried, when the corn germ, the corn fiber and the corn protein are dried, the drying is mainly carried out in a tube bundle dryer, secondary waste gas of a tube bundle produced in the drying process of the tube bundle dryer is directly discharged into the atmosphere by a fan after passing through a cyclone dust collector, the secondary waste gas has high temperature of about 85 ℃, the secondary waste gas is directly discharged, and a large amount of waste heat is not utilized, so that the great energy waste and the environmental pollution are caused. In order to recycle the heat in the secondary waste gas of the tube bundle and fully utilize the energy, the corn starch production enterprise usually utilizes the secondary waste gas of the tube bundle to carry out evaporation concentration on the corn soaking solution for producing corn steep liquor at present, and when concentrated corn thick liquor is sent into a tube bundle dryer for drying, the energy consumption required by drying can be effectively reduced, so that the purposes of recycling the waste heat in the secondary waste gas of the tube bundle and reducing the energy consumption are achieved.
However, a large amount of heat still remains in the tube bundle secondary exhaust gas after the corn steep liquor concentration, and the temperature of the exhaust gas discharged from the corn steep liquor concentration system is usually about 68 ℃, and the exhaust gas is still high in temperature and directly discharged, so that a large amount of energy waste and environmental pollution are still caused.
SUMMERY OF THE UTILITY MODEL
To sum up, in order to overcome prior art problem not enough, the utility model provides a dry waste gas waste heat recovery system of corn starch by-product tube bank, it utilizes concentrated system exhaust waste gas heating starch washing water of corn steep liquor and maize to soak the water, soaks the water with starch washing water and maize and heats to its required temperature from the normal atmospheric temperature, realizes recycling to waste gas waste heat to reduce energy resource consumption, reduction in production cost improves enterprise competitiveness.
In order to solve the technical problem, the utility model adopts the technical scheme that:
the utility model provides a dry waste gas waste heat recovery system of corn starch by-product tube bank, wherein: the system comprises a primary heat exchanger A, a primary heat exchanger B, a secondary heat exchanger, a primary conveying pump A, a primary conveying pump B, a secondary conveying pump, a corn steep liquor storage tank and a steep liquor conveying pump, wherein an air inlet of the primary heat exchanger A is communicated with an exhaust gas discharge header pipe through an air inlet pipeline A, the exhaust gas discharge header pipe is communicated with a fan air outlet of a corn steep liquor concentration system and an air inlet of an exhaust gas deodorization system, an air outlet of the primary heat exchanger A is communicated with an air inlet of the secondary heat exchanger through a pipeline, an air outlet of the secondary heat exchanger is communicated with the exhaust gas discharge header pipe through a pipeline, a feed inlet of the primary heat exchanger A is communicated with a liquid outlet of the corn steep liquor storage tank through the soak liquor conveying pump, a discharge outlet of the primary heat exchanger A is communicated with a liquid inlet of the corn steep liquor storage tank through the primary conveying pump A, a liquid inlet of the corn steep liquor storage tank is communicated with a feed water return pipeline and a liquid outlet of the corn steep liquor soaking tank through pipelines respectively, an outlet of the soaking liquor conveying pump is communicated with the air inlet pipeline of the corn steep liquor concentration system through a pipeline, a feed inlet of the secondary heat exchanger B is communicated with a discharge outlet of the secondary heat exchanger B, a washing pipeline of the primary heat exchanger B is communicated with a starch supply pipeline, and a starch supply pipeline of the secondary heat exchanger B is communicated with an exhaust gas outlet of the secondary heat exchanger B through an exhaust gas inlet pipeline.
Furthermore, the condensed water outlet of the primary heat exchanger A, the condensed water outlet of the primary heat exchanger B and the condensed water outlet of the secondary heat exchanger are communicated with a condensed water collecting tank of the corn steep liquor concentrating system through condensed water discharge pipelines.
Furthermore, the number of maize soak solution storage tanks be two, two maize soak solution storage tanks set up in parallel, two maize soak solution storage tanks communicate with one-level heat exchanger A's feed inlet through two soak solution delivery pumps respectively.
Further, a second-stage temperature sensor is arranged on a pipeline communicated with a discharge port of the second-stage heat exchanger and a feed port of the second-stage conveying pump, an air inlet valve B is arranged on the air inlet pipeline B, opening and closing of the air inlet valve B are controlled through the second-stage temperature sensor, and an air inlet valve A is arranged on the air inlet pipeline A.
Furthermore, the lower part of the first-stage heat exchanger A, the lower part of the first-stage heat exchanger B and the lower part of the second-stage heat exchanger are respectively provided with a liquid level meter, the liquid level meter at the lower part of the first-stage heat exchanger A controls the opening and closing of the first-stage delivery pump A, the liquid level meter at the lower part of the first-stage heat exchanger B controls the opening and closing of the first-stage delivery pump B, and the liquid level meter at the lower part of the second-stage heat exchanger controls the opening and closing of the second-stage delivery pump.
Furthermore, an exhaust valve is arranged on the exhaust gas discharge header pipe, and the air inlet pipeline A and the air inlet pipeline B are connected to the exhaust gas discharge header pipe between the exhaust valve and the air outlet of the fan of the corn steep liquor concentration system.
Furthermore, temperature sensors are arranged on the air outlet of the primary heat exchanger A, the air outlet of the primary heat exchanger B, the air outlet of the secondary heat exchanger and the air inlet of the secondary heat exchanger, and the temperature sensors are arranged.
The utility model has the advantages that:
1. the utility model discloses an utilize concentrated system exhaust waste gas heating starch washing water of corn steep liquor and maize to soak the water, soak starch washing water and maize and heat to its required temperature from the normal atmospheric temperature with the water, realize recycling waste gas waste heat to reduce energy resource consumption, reduction in production cost improves enterprise competitiveness.
2. The utility model discloses an one-level heat exchanger A adopts the relatively higher waste gas heating maize soak solution of temperature, later adopt waste gas heating starch washing water after one-level heat exchanger A heat transfer cooling, starch washing water temperature is about 40 ℃, maize soak temperature is about 60 ℃, therefore, the concentrated system exhaust waste gas of corn steep liquor is used for heating maize soak solution earlier, later be used for heating starch washing water after the waste gas cooling, and simultaneously, set up second grade temperature sensor on the discharge gate of second grade heat exchanger, the starch washing water after second grade temperature sensor detects the heating, if the starch washing water temperature reaches when not reaching 40 ℃ after the heating, control admission valve B opens, starch washing water gets into one-level heat exchanger B, utilize the concentrated system exhaust waste gas reheating starch washing water of corn steep liquor, guarantee that the temperature of starch washing water satisfies needs.
3. The utility model discloses simple structure, convenient to use, low cost, the waste heat in the pipe bundle secondary waste gas that produces when can be effectively abundant recovery corn starch by-product pipe bundle is dry, pipe bundle secondary waste gas is through the concentrated recovery waste heat rear temperature of corn steep liquor about 68 ℃, through the utility model discloses the exhaust gas temperature behind the recovery waste heat is about 20 ℃, need not additionally to supply the heat source can realize that the heating of starch washing water and corn steep liquor heaies up.
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, the corn starch byproduct tube bundle drying waste gas waste heat recovery system comprises a primary heat exchanger A1, a primary heat exchanger B2, a secondary heat exchanger 3, a primary delivery pump A4, a primary delivery pump B5, a secondary delivery pump 6, a corn soaking solution storage tank 7 and a soaking solution delivery pump 8, wherein an air inlet of the primary heat exchanger A1 is communicated with a waste gas discharge header pipe 9 through an air inlet pipeline a10, the waste gas discharge header pipe 9 is communicated with a fan air outlet of a corn steep liquor concentration system 18 and an air inlet of a waste gas deodorization system, an exhaust valve 17 is arranged on the waste gas discharge header pipe 9, and the air inlet pipeline a10 is connected to the waste gas discharge header pipe 9 between the exhaust valve 17 and the fan air outlet of the corn steep liquor concentration system 18. Be provided with admission valve A16 on the admission line A10, the gas outlet of one-level heat exchanger A1 pass through the air inlet of pipeline intercommunication second grade heat exchanger 3, pipeline intercommunication exhaust emission house steward 9 is passed through to the gas outlet of second grade heat exchanger 3, the liquid outlet of soaking liquid delivery pump 8 intercommunication maize soak solution storage tank 7 is passed through to the feed inlet of one-level heat exchanger A1, the discharge gate of one-level heat exchanger A1 passes through the inlet of one-level delivery pump A4 intercommunication maize soak solution storage tank 7, the quantity of maize soak solution storage tank 7 be two, the discharge gate of one-level heat exchanger A1 passes through the feed inlet of pipeline intercommunication one-level delivery pump A4, the discharge gate of one-level delivery pump A4 passes through the inlet that two maize soak solution storage tanks 7 are connected respectively to two pipelines, the inlet of two maize soak solution storage tanks 7 still passes through pipeline intercommunication maize soak solution material loading return water pipeline 11 and maize soak tank liquid outlet, two maize soak solution storage tanks 7 communicate through the feed inlet of two soaking solution delivery pumps 8 and one-level heat exchanger A1 respectively. The liquid outlets of the two soaking liquid delivery pumps 8 are communicated with a corn water feeding pipeline 12 and a corn steep liquor concentration system 18 through a liquid outlet pipeline, and a valve is arranged on the liquid outlet pipeline. The feed inlet of second grade heat exchanger 3 communicate fresh water source once, the discharge gate of second grade heat exchanger 3 passes through the feed inlet of second grade delivery pump 6 intercommunication first grade heat exchanger B2, the discharge gate of first grade heat exchanger B2 passes through first grade delivery pump B5 intercommunication starch washing supply channel, the air inlet of first grade heat exchanger B2 communicate exhaust emission house steward 9 through air inlet pipeline B13, air inlet pipeline B13 is connected on exhaust valve 17 and the exhaust emission house steward 9 between the fan air outlet of corn steep liquor concentrated system 18, air inlet pipeline B13 on be provided with admission valve B15, be provided with second grade temperature sensor 14 on the pipeline of the discharge gate of second grade heat exchanger 3 and the feed inlet intercommunication of second grade delivery pump 6, open and close through second grade temperature sensor 14 control admission valve B15, the air outlet of first grade heat exchanger B2 passes through the air inlet of pipeline intercommunication second grade heat exchanger 3.
And the condensed water outlet of the primary heat exchanger A1, the condensed water outlet of the primary heat exchanger B2 and the condensed water outlet of the secondary heat exchanger 3 are communicated with a condensed water collecting tank of the corn steep liquor concentrating system 18 through condensed water discharge pipelines. The lower part of the first-stage heat exchanger A1, the lower part of the first-stage heat exchanger B2 and the lower part of the second-stage heat exchanger 3 are respectively provided with a liquid level meter, the liquid level meter at the lower part of the first-stage heat exchanger A1 controls the opening and closing of a first-stage delivery pump A4, the liquid level meter at the lower part of the first-stage heat exchanger B2 controls the opening and closing of a first-stage delivery pump B5, and the liquid level meter at the lower part of the second-stage heat exchanger 3 controls the opening and closing of a second-stage delivery pump 6. Temperature sensors are arranged on the air outlet of the first-stage heat exchanger A1, the air outlet of the first-stage heat exchanger B2, the air outlet of the second-stage heat exchanger 3 and the air inlet of the second-stage heat exchanger 3, and the temperature sensors are arranged.
When the corn steep liquor heat exchanger is used, waste gas discharged from an air outlet of a fan of the corn steep liquor concentration system 18 flows along the waste gas discharge header pipe 9, the exhaust valve 17 is closed, the waste gas enters a tube side of the primary heat exchanger A1 along the air inlet pipeline A10, soak solution in the corn soak solution storage tank 7 enters a shell side of the primary heat exchanger A1 from a feed inlet of the primary heat exchanger A1 under the action of the soak solution delivery pump 8, the waste gas at about 68 ℃ exchanges heat with the corn soak solution in the primary heat exchanger A1, the corn soak solution is heated and heated, the waste gas is cooled, after a liquid level meter at the lower part of the primary heat exchanger A1 reaches a set liquid level, the primary delivery pump A4 is started, the heated corn soak solution is delivered to the corn soak solution storage tank 7 again, the circulation is carried out until the corn steep solution is heated to about 60 ℃, then a valve on the liquid outlet pipeline is opened, and the soak solution enters the soak tank along the upper corn water delivery pipeline 12 to soak corn grains. If corn is not to be steeped, the warmed steep liquor may be delivered to the corn steep liquor concentration system 18.
Waste gas flowing out of an air outlet of the primary heat exchanger A1 enters a tube pass of the secondary heat exchanger 3, primary fresh water is input into a shell pass of the secondary heat exchanger 3, the waste gas and the primary fresh water are subjected to heat exchange in the secondary heat exchanger 3, the primary fresh water is heated, the waste gas is cooled again and then flows out of an air outlet of the secondary heat exchanger 3, then the waste gas enters a waste gas deodorization system for purification and deodorization and is discharged, the heated primary fresh water enters a shell pass of the primary heat exchanger B2 under the action of the secondary delivery pump 6, waste gas discharged from a fan air outlet of the corn steep liquor concentration system 18 enters the primary heat exchanger B2 along an air inlet pipeline B13, the primary fresh water is heated by the waste gas again in the primary heat exchanger B2 to about 40 ℃, and then is delivered to wash starch under the action of the primary delivery pump B5.
It should be noted that the above-mentioned embodiments are illustrative and not restrictive of the technical solutions of the present invention, and equivalents of those skilled in the art or other modifications made according to the prior art should be included in 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 dry waste gas waste heat recovery system of cornstarch by-product tube bank which characterized in that: comprises a primary heat exchanger A (1), a primary heat exchanger B (2), a secondary heat exchanger (3), a primary conveying pump A (4), a primary conveying pump B (5), a secondary conveying pump (6), a corn soaking solution storage tank (7) and a soaking solution conveying pump (8), wherein an air inlet of the primary heat exchanger A (1) is communicated with a waste gas discharge header pipe (9) through an air inlet pipeline A (10), the waste gas discharge header pipe (9) is communicated with a fan air outlet of a corn steep liquor concentration system (18) and an air inlet of a waste gas deodorization system, an air outlet of the primary heat exchanger A (1) is communicated with an air inlet of the secondary heat exchanger (3) through a pipeline, an air outlet of the secondary heat exchanger (3) is communicated with a waste gas discharge header pipe (9) through a pipeline, a feed inlet of the primary heat exchanger A (1) is communicated with a soaking solution storage tank (7) through the soaking solution conveying pump (8), a discharge outlet of the primary heat exchanger A (1) is communicated with a liquid inlet of the corn soaking solution storage tank (7) through the primary conveying pump A (4), a water outlet of the primary heat exchanger A (7) is communicated with a water inlet of the corn soaking solution feeding tank (11) through a pipeline, a corn soaking solution feeding pipeline A water feeding pipeline and a corn steep liquor feeding pipeline (12) through a corn steep liquor feeding pipeline respectively, a corn steep liquor feeding pipeline A feeding pipeline and a corn steep liquor feeding pipeline (8) are communicated with a corn steep liquor feeding pipeline 12) through the corn steep liquor feeding pipeline respectively, the feed inlet of second grade heat exchanger (3) communicate fresh water source once, the discharge gate of second grade heat exchanger (3) passes through the feed inlet of second grade delivery pump (6) intercommunication one-level heat exchanger B (2), the discharge gate of one-level heat exchanger B (2) passes through one-level delivery pump B (5) intercommunication starch washing water supply pipe, the air inlet of one-level heat exchanger B (2) pass through air inlet pipeline B (13) intercommunication exhaust emission house steward (9), the air outlet of one-level heat exchanger B (2) passes through the air inlet of pipeline intercommunication second grade heat exchanger (3).
2. The corn starch byproduct tube bundle drying exhaust gas waste heat recovery system of claim 1, characterized in that: and the condensed water outlet of the primary heat exchanger A (1), the condensed water outlet of the primary heat exchanger B (2) and the condensed water outlet of the secondary heat exchanger (3) are communicated with a condensed water collecting tank of a corn steep liquor concentrating system (18) through condensed water discharge pipelines.
3. The corn starch byproduct tube bundle drying exhaust gas waste heat recovery system of claim 1, characterized in that: the corn soaking liquid storage tanks (7) are connected in parallel, and the two corn soaking liquid storage tanks (7) are communicated with a feed inlet of the first-stage heat exchanger A (1) through two soaking liquid delivery pumps (8).
4. The corn starch byproduct tube bundle drying exhaust gas waste heat recovery system of claim 1, characterized in that: the pipeline of the discharge hole of the secondary heat exchanger (3) and the feed inlet of the secondary delivery pump (6) is provided with a secondary temperature sensor (14), the air inlet pipeline B (13) is provided with an air inlet valve B (15), the opening and closing of the air inlet valve B (15) are controlled through the secondary temperature sensor (14), and the air inlet pipeline A (10) is provided with an air inlet valve A (16).
5. The corn starch byproduct tube bundle drying exhaust gas waste heat recovery system of claim 1, characterized in that: the lower part of the first-stage heat exchanger A (1), the lower part of the first-stage heat exchanger B (2) and the lower part of the second-stage heat exchanger (3) are respectively provided with a liquid level meter, the liquid level meter at the lower part of the first-stage heat exchanger A (1) controls the opening and closing of the first-stage delivery pump A (4), the liquid level meter at the lower part of the first-stage heat exchanger B (2) controls the opening and closing of the first-stage delivery pump B (5), and the liquid level meter at the lower part of the second-stage heat exchanger (3) controls the opening and closing of the second-stage delivery pump (6).
6. The corn starch byproduct tube bundle drying exhaust gas waste heat recovery system of claim 1, characterized in that: the exhaust gas emission system is characterized in that an exhaust valve (17) is arranged on the exhaust gas emission main pipe (9), and the air inlet pipeline A (10) and the air inlet pipeline B (13) are connected to the exhaust gas emission main pipe (9) between the exhaust valve (17) and an air outlet of a fan of the corn steep liquor concentration system (18).
7. The corn starch byproduct tube bundle drying exhaust gas waste heat recovery system of claim 1, characterized in that: temperature sensors are arranged on the air outlet of the primary heat exchanger A (1), the air outlet of the primary heat exchanger B (2), the air outlet of the secondary heat exchanger (3) and the air inlet of the secondary heat exchanger (3), and the temperature sensors are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222192116.2U CN218410815U (en) | 2022-08-19 | 2022-08-19 | Corn starch byproduct tube bundle drying waste gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222192116.2U CN218410815U (en) | 2022-08-19 | 2022-08-19 | Corn starch byproduct tube bundle drying waste gas waste heat recovery system |
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| Publication Number | Publication Date |
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| CN218410815U true CN218410815U (en) | 2023-01-31 |
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| CN202222192116.2U Active CN218410815U (en) | 2022-08-19 | 2022-08-19 | Corn starch byproduct tube bundle drying waste gas waste heat recovery system |
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| CN (1) | CN218410815U (en) |
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- 2022-08-19 CN CN202222192116.2U patent/CN218410815U/en active Active
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