CN103833051A - Method for preventing alkali pipe clogging caused by high temperature high concentration alkali liquid - Google Patents
Method for preventing alkali pipe clogging caused by high temperature high concentration alkali liquid Download PDFInfo
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- CN103833051A CN103833051A CN201210483512.9A CN201210483512A CN103833051A CN 103833051 A CN103833051 A CN 103833051A CN 201210483512 A CN201210483512 A CN 201210483512A CN 103833051 A CN103833051 A CN 103833051A
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Abstract
The present invention discloses a method for preventing alkali pipe clogging caused by a high temperature high concentration alkali liquid. The method comprises that: a usually-smooth alkali liquid bypass capable of automatically outflowing is arranged on the lowest position from a final concentrator to the U-shaped pipe of a flash evaporation tank, and the alkali liquid discharged from the bypass converges into the alkali discharge channel of the flash evaporation tank, wherein the alkali liquid flow rate in the bypass and the flow rate of the alkali liquid finally discharged into the U-shaped pipe from the final concentrator have the set ratio capable of meeting the solid alkali purity, preferably the set ratio of the alkali liquid flow rate in the bypass to the flow rate of the alkali liquid finally discharged into the U-shaped pipe from the final concentrator is 3-8%. The method has the following beneficial effects that: the hidden danger of the clogging from the final concentrator to the U-shaped pipe of the flash evaporation tank is eliminated, and characteristics of simple method, increased alkali production efficiency and reduced production cost are provided.
Description
Technical field
The present invention relates to chlor-alkali preparing technical field, particularly a kind of method that prevents high-temperature high concentration alkali lye obstruction alkali pipe.
Background technology
In a kind of sodium hydroxide film-making process, high alkali liquid, after final thickener is concentrated, then carries out of short duration flash concentration in flash tank, and the alkali lye after flash distillation directly enters alkali liquor allocator, then carries out cooling and make solid alkali through solid alkali alkaline machine.But the final thickener in this alkali-making process has U structure to the alkali lye transport pipe of flash tank, in U-shaped pipe, alkali temperature can reach 400 DEG C of left and right, and its concentration reaches 98.5%.Its zero pour of the sodium hydroxide that is 98.5% for concentration is 318 DEG C.In the time of normal production, the high density molten caustic soda in U-shaped pipe flows, can blocking pipe, but in the time stopping producing, as do not discharged in time the alkali lye in U-shaped pipe, alkali liquid temperature can be reduced to below zero pour rapidly, thereby in a short period of time by alkali blockage.The rear alkali pipe of obstruction is dredged very difficult again, U open pipe must be removed by other mechanical means alkali pipe is dredged, and will waste so a large amount of time and cost.Existing obstruction-proof method has two kinds, and one is to rinse adding water from final thickener to flash tank while stopping, but water can accelerate alkali lye after entering cooling, and when water does not also rush alkali outlet pipe by alkali lye completely, alkali lye has stopped up pipeline to cooled and solidified point.Another kind method is to add a vapour pipe at U-shaped pipe lowest part, controls steam enter by valve, in the time stopping producing, by steam, the alkali lye in U-shaped pipe is gone out to U-shaped pipe, reaches the object of getting rid of alkali lye in U-shaped pipe.But on the place that vapour pipe and U open pipe connect and vapour pipe, the position of valve has an intersegmental distance all the time, will cause alkali lye to accumulate at this pipeline section, because the vapor temperature using is the highest 170 DEG C of left and right, and 400 DEG C of alkali liquid temperatures, therefore, this pipeline section can, by steam and cooled and solidified easily causes the obstruction of this pipeline section, be difficult to accomplish the end in view.For this reason, need to improve.
Summary of the invention
Object of the present invention is exactly for the deficiencies in the prior art, provides a kind of and prevents that high-temperature high concentration alkali lye from stopping up the method for alkali pipe, utilizes the method simple, has eliminated U-shaped blockage hidden danger, can improve alkaline production efficiency, reduces production costs.
For achieving the above object, the present invention adopts following technical scheme.
Prevent that high-temperature high concentration alkali lye from stopping up a method for alkali pipe, is included in the alkali lye bypass that final thickener arranges a normal open and can automatically flow out to the U-shaped pipe lowest part of flash tank; This bypass is discharged to alkali lye confluxes to row's alkali path of flash tank; Flux of alkaline liquor in described bypass has the setting ratio that can meet solid alkali purity with the flux of alkaline liquor that final thickener enters U-shaped pipe.
Adopt the present invention of aforementioned techniques scheme, due to the alkali lye bypass that one normal open is set and can automatically flows out at U-shaped pipe lowest part, in whole alkaline working process, high-temperature concentrated alkali in U-shaped pipe is under row's alkali pressure-acting of final thickener, a part enters flash tank through U-shaped pipe epimere, a part has the alkali lye of certain flow to continue to flow out in bypass, and conflux to row's alkali path of flash tank, this part alkali lye directly enters alkaline machine and is together made into solid alkali with the alkali lye that flash tank is got rid of without flash concentration, and wherein the flux of alkaline liquor of alkali lye bypass is chosen with the principle that does not affect solid alkali purity with the ratio that final thickener enters the flux of alkaline liquor of U-shaped pipe.In the time that finally thickener and flash tank quit work, U-shaped Guan Zhongwu row alkali pressure, the alkali lye of accumulating at the bottom of its rising pipeline section and U-shaped pipe can automatically be flowed out and be entered alkaline machine by alkali lye bypass, and this part alkali lye is cooled and solidifies in alkaline machine, then can be made into solid alkali.Therefore, neither can cause U-shaped blockage, bring detrimentally affect also can to alkaline machine.
Preferred technical scheme, the flux of alkaline liquor in described bypass is 3%～8% with the setting ratio that final thickener enters the flux of alkaline liquor of U-shaped pipe.When guaranteeing normally to work, made solid alkali reaches setting purity requirement.
The present invention's beneficial effect is compared with prior art eliminated the obstruction hidden danger to flash tank U-shaped pipe of final thickener, and method to be simple, can improve alkaline production efficiency, reduces production costs.
Brief description of the drawings
Fig. 1 is the alkaline apparatus structure schematic diagram of application the inventive method.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated, but therefore do not limit the present invention among described scope of embodiments.
embodiment 1referring to Fig. 1, a kind of method that prevents high-temperature high concentration alkali lye obstruction alkali pipe, is included in the alkali lye bypass that final thickener 1 arranges a normal open and can automatically flow out to U-shaped pipe 3 lowest parts of flash tank 2; This bypass is discharged to alkali lye confluxes to row's alkali path of flash tank; Flux of alkaline liquor in described bypass has the setting ratio that can meet solid alkali purity with the flux of alkaline liquor that final thickener 1 enters U-shaped pipe 3.
Flux of alkaline liquor in described bypass is 3%～8% with the setting ratio that final thickener enters the flux of alkaline liquor of U-shaped pipe.
embodiment 2referring to Fig. 1, a kind of U-shaped alkali pipe is without the alkaline device stopping up, comprise final thickener 1, flash tank 2, between final thickener 1 bottom and flash tank 2 middle parts, be connected with U-shaped pipe 3 to form the concentrated base alkali lye path of final thickener 1 bottom and flash tank 2, flash tank 2 bottoms are provided with Pipe for draining alkali 4 for the concentrated base alkali lye after flash distillation is delivered to solid alkali alkaline machine; Described U-shaped pipe 3 bottoms are connected a downward-sloping concentrated base alkali lye bypass tube 5 with Pipe for draining alkali 4, to form the alkali lye bypass that can automatically flow out on concentrated base alkali lye path, and in the alkali lye remittance Pipe for draining alkali 4 that alkali lye bypass is flowed out, the valid circulation area of concentrated base alkali lye bypass tube 5 and the valid circulation area of U-shaped pipe 3 have the setting ratio that can meet solid alkali purity.This setting ratio is 2%～7%, and to consider U-shaped pipe 3 pressure reduction, the flux of alkaline liquor of realizing in bypass is 3%～8% with the setting ratio that final thickener enters the flux of alkaline liquor of U-shaped pipe.
Although combine above accompanying drawing, embodiments of the present invention are described, but those of ordinary skill in the art also can recognize making various variations or amendment in the scope of claims, these modifications and variations are interpreted as within scope of the present invention and intention.
Claims (2)
1. prevent that high-temperature high concentration alkali lye from stopping up a method for alkali pipe, is included in the alkali lye bypass that final thickener (1) arranges a normal open and can automatically flow out to U-shaped pipe (3) lowest part of flash tank (2); This bypass is discharged to alkali lye confluxes to row's alkali path of flash tank; Flux of alkaline liquor in bypass has the setting ratio that can meet solid alkali purity with the flux of alkaline liquor that final thickener (1) enters U-shaped pipe (3).
2. the method that prevents high-temperature high concentration alkali lye obstruction alkali pipe according to claim 1, is characterized in that: the flux of alkaline liquor in described bypass is 3%～8% with the setting ratio that final thickener enters the flux of alkaline liquor of U-shaped pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483512.9A CN103833051B (en) | 2012-11-26 | 2012-11-26 | A kind of method preventing high-temperature high concentration alkali lye from blocking alkali pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210483512.9A CN103833051B (en) | 2012-11-26 | 2012-11-26 | A kind of method preventing high-temperature high concentration alkali lye from blocking alkali pipe |
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| CN103833051A true CN103833051A (en) | 2014-06-04 |
| CN103833051B CN103833051B (en) | 2015-08-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610955A (en) * | 2002-04-05 | 2005-04-27 | 住友电气工业株式会社 | Cooling method of super-conducting cable line |
| CN2747000Y (en) * | 2004-11-09 | 2005-12-21 | 江苏圆通汽车零部件有限责任公司 | Device for monitoring temp. at lifting liquid pouring slot of low pressure foundry machine |
| JP2009293871A (en) * | 2008-06-06 | 2009-12-17 | Chugoku Electric Power Co Inc:The | Start bypass system in steam power generation facility and its operating method |
| CN202164130U (en) * | 2011-07-04 | 2012-03-14 | 山东布莱恩化工技术有限公司 | Caustic soda solidifying device for ionic membrane caustic soda production |
| CN202201140U (en) * | 2011-07-14 | 2012-04-25 | 王效东 | Novel floating drum applied on floating production, storage and offloading unit |
-
2012
- 2012-11-26 CN CN201210483512.9A patent/CN103833051B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1610955A (en) * | 2002-04-05 | 2005-04-27 | 住友电气工业株式会社 | Cooling method of super-conducting cable line |
| CN2747000Y (en) * | 2004-11-09 | 2005-12-21 | 江苏圆通汽车零部件有限责任公司 | Device for monitoring temp. at lifting liquid pouring slot of low pressure foundry machine |
| JP2009293871A (en) * | 2008-06-06 | 2009-12-17 | Chugoku Electric Power Co Inc:The | Start bypass system in steam power generation facility and its operating method |
| CN202164130U (en) * | 2011-07-04 | 2012-03-14 | 山东布莱恩化工技术有限公司 | Caustic soda solidifying device for ionic membrane caustic soda production |
| CN202201140U (en) * | 2011-07-14 | 2012-04-25 | 王效东 | Novel floating drum applied on floating production, storage and offloading unit |
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| Publication number | Publication date |
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| CN103833051B (en) | 2015-08-05 |
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Effective date of registration: 20200908 Address after: 400030, Shapingba District, Chongqing, 281 Dragon Street, No. 6 attached Patentee after: CHONGQING BOZHANG MECHANO-ELECTRONIC EQUIPMENT Co.,Ltd. Address before: 400030, Shapingba District, Chongqing, 33 Dragon Street No. 4, 5-1 attached Patentee before: Zhang Jian |
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Effective date of registration: 20211101 Address after: 400030, Shapingba District, Chongqing, 33 Dragon Street No. 4, 5-1 attached Patentee after: Zhang Jian Address before: No.281-6, Xiaolongkan Main Street, Shapingba District, Chongqing 400030 Patentee before: CHONGQING BOZHANG MECHANO-ELECTRONIC EQUIPMENT CO.,LTD. |
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Effective date of registration: 20221010 Address after: No.281-6, Xiaolongkan Main Street, Shapingba District, Chongqing 400030 Patentee after: CHONGQING BOZHANG MECHANO-ELECTRONIC EQUIPMENT CO.,LTD. Address before: 400030, Shapingba District, Chongqing, 33 Dragon Street No. 4, 5-1 attached Patentee before: Zhang Jian |