CN102139922A - Heating system for production process of chromate - Google Patents
Heating system for production process of chromate Download PDFInfo
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- CN102139922A CN102139922A CN2011100357000A CN201110035700A CN102139922A CN 102139922 A CN102139922 A CN 102139922A CN 2011100357000 A CN2011100357000 A CN 2011100357000A CN 201110035700 A CN201110035700 A CN 201110035700A CN 102139922 A CN102139922 A CN 102139922A
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- China
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- kitchen range
- heating system
- flue gas
- chromium powder
- heated
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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
- Y02P20/10—Process efficiency
Abstract
The invention relates to a heating system for a production process of chromate. At present, a converter calcination method for producing the chromate has the defect that the heat utilization rate is low, and the defect that flue gas is also not utilized. The heating system of the invention comprises a primary oven, a secondary oven, an alkali liquor preheating barrel, a chromium powder preheating barrel and a heating jacket, wherein a continuous liquid-phase oxidation reaction tower and compressed air which participates in a reaction are heated by utilizing the flue gas in the primary oven, materials in the alkali liquor preheating barrel and the chromium powder preheating barrel are heated by utilizing the flue gas in the secondary oven, and the preheated materials are heated further by the primary oven and the secondary oven simultaneously, so that the materials are heated to the temperature required by the reaction. By adopting the heating system, the heat utilization rate and the efficiency of a chromate reaction tower can be improved while the using amount of coal is reduced so as to achieve the effects of energy conservation, emission reduction and the reduction of production cost.
Description
Technical field
The present invention relates to the production of chromic salt, say so in more detail about the heating system in the chromic salt production technique.
Background technology
The chromic salt production technique generally adopts the converter roasting method to produce chromic salt at present, and it has weak points such as the chromite ore fine dust is big, noise serious, severe operational environment, the chromium transformation efficiency is low, production cost is high, labor strength is big in process of production.Because it is to utilize the coal combustion direct roasting, heat utilization ratio is low, energy consumption is high so its heating system has, smoke harm is big, not only causes environmental pollution, but also causes the waste of heat.
Present inventors are at above deficiency, and through research with keen determination for a long time, temperature is about 500 ℃ after finding to utilize dedusting, and flow velocity is about 9000m
3The stack gas of/s can be carried out heat tracing to continuous liquid phase oxidation reaction tower, and raw material is carried out preheating, has both utilized the heat of stack gas, has improved heat utilization ratio again, has also reduced production cost, has so far finished the present invention.
Summary of the invention
The objective of the invention is to solve in the chromic salt production process heat utilization ratio low, pollute big, the high deficiency of production cost.
Second purpose of the present invention is to utilize stack gas that raw material and the pressurized air that reacts usefulness are carried out preheating,
Reduce the consumption of coal, reach the effect of energy-saving and emission-reduction.
The 3rd purpose of the present invention is to utilize stack gas that continuous liquid phase oxidation reaction tower is carried out heat tracing,
And then improve the reaction efficiency of continuous liquid phase oxidation reaction tower, reach the purpose that volume increase reduces production costs.
In order to achieve the above object, the present invention is achieved in that
A kind of heating system of chromic salt production technique, form by main kitchen range (19), secondary kitchen range (15), cleaning apparatus (13) and cleaning apparatus (24), heating jacket, chromium powder preheating bucket (5), alkali lye preheating bucket (6) and flue gas outlet, after it is characterized in that the stack gas dedusting of main kitchen range generation, by pipe connection master kitchen range (19) and continuously liquid phase oxidation reaction tower chuck (28) heat and be incubated, and the pressurized air that participates in reacting is heated and is incubated; After the stack gas dedusting that secondary kitchen range produces, preheat and be incubated by the chuck of pipeline to alkali lye preheating bucket (6) and chromium powder preheating bucket (5);
A kind of heating system of chromic salt production technique is characterized in that described main kitchen range (19) and secondary kitchen range (15) mainly are made up of reciprocating furnace and inner main pot (21) and (22), secondary pot (17) and (18) and the flue gas outlet that agitator is housed;
A kind of heating system of chromic salt production technique is characterized in that described alkali lye preheating bucket (6) and the mutual coupled in series of its outer heating jacket of chromium powder preheating bucket (5), and agitator is equipped with in its inside.
Description of drawings
Accompanying drawing 1 is a system flow synoptic diagram of the present invention.
1. induced draft fan; 2. flue gas outlet; 3. the chromium powder slurry outlet that is mixed; 4 chromium powder mixed ingredients slurry inlets; 5. chromium powder preheating bucket; 6. alkali lye preheating bucket; 7. flue gas outlet; 8. alkali lye import; 9. agitator; 10. alkali lye outlet; 11. pre-thermal jacket; 12. stack gas import; 13. secondary kitchen range cleaning apparatus; 14. secondary kitchen range reciprocating furnace flue gas outlet; 15. secondary kitchen range; 16. reciprocating furnace; 17. secondary pot 1; 18. secondary pot 2; 19. main kitchen range; 20. reciprocating furnace; 21. main pot 1; 22. main pot 2; 23. main kitchen range reciprocating furnace flue gas outlet; 24. main kitchen range cleaning apparatus; 25. reaction mass alkali lye import; 26. continuous liquid phase oxidation reaction tower; 27. heat required chuck outward; 28. stack gas import; 29. reacted material outlet; 30. participate in the gas feed of reaction; 31. tapered tower tray; 32. flue gas outlet; 33. reaction mass chromium powder import; 34. reaction back pneumatic outlet; 35. air preheater; 36. air intlet; 37. reacted gas feed; 38. pneumatic outlet; 39. material outlet; 40. gas-liquid separator; 41. store bucket; 42. material inlet; 43. material outlet; 44. separator; 45. material outlet; 46. separator stack gas import; 47. the pre-thermal jacket of separator; 48. material inlet; 49. material outlet; 50. separator flue gas outlet; 51. rare bucket; 52. mix the powder container.
Below in conjunction with accompanying drawing 1, the present invention is given further instruction by embodiment.
Embodiment 1:
The stack gas that reciprocating furnace (20) burning of main kitchen range (19) produces, linked to each other with continuous liquid phase oxidation reaction tower stack gas import (28) by pipeline by flue gas outlet (23) after fly-ash separator (24) dedusting, the stack gas that its main kitchen range (19) produces is supplied with the required heat of material reaction in the continuous liquid phase oxidation reaction tower and is heated and be incubated (35) reacting pressurized air; The stack gas that reciprocating furnace (16) burning of secondary kitchen range (15) produces, after fly-ash separator (13) dedusting, link to each other by the stack gas import (12) of flue gas outlet (14) by pipeline and alkali material preheating bucket (6), wherein the stack gas heating interlayer of two alkali lye preheating buckets (6) and two chromium powder preheating buckets (5) is connected mutually, the stack gas air outlet (2) of last chromite ore fine preheating bucket (5) links to each other with induced draft fan (1), and the chromium powder of preheating is pumped in the chromium powder import (33) of continuous liquid phase oxidation reaction tower in the chromium powder preheating bucket (5) by pump; The alkali lye of preheating is pumped into preheating in the secondary pot 1 (17) then by preheating in the secondary pot 2 (18) that is pumped in the secondary kitchen range (15) in two alkali lye preheating buckets (6); The alkali material that is preheating to certain temperature in secondary pot 1 (17) is by being pumped into heating in the main pot 1 (21), flow into heating in the main pot 2 (22) then, when the alkali material is heated in the continuous liquid phase oxidation reaction tower when temperature required, enter into continuous liquid phase oxidation reaction tower and chromite ore fine reacts under certain conditions by reaction mass alkali lye import (25), to produce chromic salt.
The present invention is owing to adopted alkali lye and the chromite ore fine preheating of stack gas to reaction mass, and reheat has improved the rate of heating of reaction mass and the utilization ratio of heat, the corresponding reaction efficiency that has also improved continuous liquid phase oxidation reaction tower; Because with alkali lye and chromite ore fine and the reaction compression preheating of air of stack gas to reaction mass, reduced reaction mass required heat in main pot and secondary pot, reduced the consumption of coal, reached the purpose of energy-saving and emission-reduction, and reduced production cost, therefore can be used in widely in the production process of chromic salt.
Claims (3)
1. the heating system of a chromic salt production technique, form by main kitchen range (19), secondary kitchen range (15), cleaning apparatus (13) and cleaning apparatus (24), heating jacket, chromium powder preheating bucket (5), alkali lye preheating bucket (6) and flue gas outlet, after it is characterized in that the stack gas dedusting of main kitchen range generation, by pipe connection master kitchen range (19) and continuously liquid phase oxidation reaction tower chuck (28) heat and be incubated, and the pressurized air that participates in reacting is heated and is incubated; After the stack gas dedusting that secondary kitchen range produces, preheat and be incubated by the chuck of pipeline to alkali lye preheating bucket (6) and chromium powder preheating bucket (5).
2. the heating system of chromic salt production technique according to claim 1 is characterized in that described main kitchen range (19) and secondary kitchen range (15) mainly are made up of reciprocating furnace and inner main pot (21) and (22), secondary pot (17) and (18) and the flue gas outlet that agitator is housed.
3. the heating system of chromic salt production technique according to claim 1 is characterized in that described alkali lye preheating bucket (6) and the mutual coupled in series of its outer heating jacket of chromium powder preheating bucket (5), and agitator is equipped with in its inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100357000A CN102139922A (en) | 2011-01-27 | 2011-01-27 | Heating system for production process of chromate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100357000A CN102139922A (en) | 2011-01-27 | 2011-01-27 | Heating system for production process of chromate |
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| Publication Number | Publication Date |
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| CN102139922A true CN102139922A (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100357000A Pending CN102139922A (en) | 2011-01-27 | 2011-01-27 | Heating system for production process of chromate |
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| CN (1) | CN102139922A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508466A (en) * | 2008-10-24 | 2009-08-19 | 天津派森科技有限责任公司 | High-efficiency, energy-conservation and clean method for producing chromate |
| CN101659444A (en) * | 2008-08-27 | 2010-03-03 | 中国科学院过程工程研究所 | Clean production method for preparing sodium chromate from chromite |
| CN101746830A (en) * | 2009-12-29 | 2010-06-23 | 重庆昌元化工有限公司 | Device for safely producing potassium manganate |
| CN101746831A (en) * | 2009-12-29 | 2010-06-23 | 重庆昌元化工有限公司 | Heating system of potassium manganate production technology |
-
2011
- 2011-01-27 CN CN2011100357000A patent/CN102139922A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101659444A (en) * | 2008-08-27 | 2010-03-03 | 中国科学院过程工程研究所 | Clean production method for preparing sodium chromate from chromite |
| CN101508466A (en) * | 2008-10-24 | 2009-08-19 | 天津派森科技有限责任公司 | High-efficiency, energy-conservation and clean method for producing chromate |
| CN101746830A (en) * | 2009-12-29 | 2010-06-23 | 重庆昌元化工有限公司 | Device for safely producing potassium manganate |
| CN101746831A (en) * | 2009-12-29 | 2010-06-23 | 重庆昌元化工有限公司 | Heating system of potassium manganate production technology |
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Application publication date: 20110803 |