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Sodium sulfide evaporation concentration system and method

An evaporation concentration system and technology of alkali sulfide, applied in the field of concentration evaporation system of alkali sulfide, to achieve the effects of improving production efficiency, reducing scaling, and easy cleaning of scaling

Inactive Publication Date: 2009-06-10
SHIJIAZHUANG GONGDA CHEM EQUIP
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved in the present invention is to provide a kind of alkali sulfide evaporation and concentration process that successfully solves the scaling problem of sodium sulfide multi-effect evaporator and makes the scaling easy to clean
Pre-evaporator communicated with primary steam

Method used

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  • Sodium sulfide evaporation concentration system and method

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Embodiment Construction

[0019] The present invention is described in further detail below in conjunction with accompanying drawing:

[0020] The alkali sulfide evaporation and concentration system of the present invention includes a material preheating part, a pre-evaporation part, a solution purification and solid separation part, a four-effect evaporation part, a single-effect evaporation part, a condensed water recycling part, and a cooling water part. Its specific equipment includes: boiler, three-stage preheater, pre-separator, pre-evaporator, raw liquid heat exchanger, raw liquid flash tank, clarification tank, sand filter tank, filtrate storage tank, four-effect evaporator, intermediate product tank , single-effect condensate preheater, single-effect evaporator, direct condenser and circulating water system.

[0021] The saturated steam produced by the boiler is used as the heat source of evaporation, the pressure of the saturated steam is 0.45MPa, and the temperature is 155°C; the raw materia...

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Abstract

The invention discloses an alkali sulphide evaporation concentration system and a method thereof. The system includes a preheater, a compound evaporator, a middle finished product tank, a single effect condensation water preheater, a single effect evaporator, a middle storing tank and a finished product storing tank; a pre-evaporating apparatus is set between the preheater and the compound evaporator, the pre-evaporating apparatus is composed of one preseparator and two alternative pre-evaporator, the pre-evaporator and the compound evaporator are communicated circularly, the pre-evaporator communicates with first high pressure steam. A stock solution heat exchanger and a stock solution flash drum are connected between the pre-evaporator apparatus; another part of the stock solution heat exchanger communicates with a filtering solution storing tank and the compound evaporator. Stock solution forms most scale formation after passing through the pre-separator and the pre-evaporator, then enters into the compound evaporator for evaporating after precipitating, filtering, clarifying and heat exchanging; therefore, the compound evaporator has little scale formation, and period of stopping for scale removal is delayed from 1-4 weeks to after one year.

Description

technical field [0001] The invention relates to a chemical process, in particular to a concentration and evaporation system and method for producing alkali sulfide in the barium salt industry. Background technique [0002] The chemical name of sodium sulfide is sodium sulfide, and the molecular formula is Na 2 S, water dissolves into strong alkali, which will cause burns when it touches the skin and hair, so sodium sulfide is commonly known as alkali sulfide in the industry. Pure sodium sulfide anhydrate is white cubic crystal or granule, which is highly corrosive, easy to change color in the air, and unstable. Sodium sulfide has a wide range of uses. It is used in the dye industry to produce sulfur dyes. In the printing and dyeing industry, it is used as a dyeing aid for dissolving sulfur dyes. In the tanning industry, it is used for hydrolysis to dehair hides. It is also used to prepare sodium polysulfide to accelerate drying. Soaking the skin in water to help soften it,...

Claims

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Application Information

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IPC IPC(8): B01D1/26C01B17/22
Inventor 张继军李玉珠
Owner SHIJIAZHUANG GONGDA CHEM EQUIP
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