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Caustic soda evaporating method using heat-conducting oil for heating

A heat-conducting oil heater, heat-conducting oil technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of difficult operation, large investment in fixed assets, and high energy consumption, and achieve The effect of reducing investment, large production capacity and simple operation

Inactive Publication Date: 2011-07-06
康仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Disadvantages are large investment in fixed assets, high energy consumption and difficult operation

Method used

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  • Caustic soda evaporating method using heat-conducting oil for heating
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  • Caustic soda evaporating method using heat-conducting oil for heating

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Experimental program
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Embodiment Construction

[0035] Manufacture and install a heat transfer oil evaporation device with an annual output of 100,000 tons of caustic soda.

[0036] 1. According tofigure 1 , figure 2 Fabrication and installation of two thermal oil heaters.

[0037] After calculation, the diameter of the No. 1 thermal oil heater is 1.08m, the height is 2.2m, and the total length of the heating pipe is 385.6m. The heating tubes are φ38×2.5 nickel tubes. The heating tubes are arranged in a hexagonal shape. There are 241 heating tubes in total, and the distance between the tube centers is 57mm.

[0038] The diameter of No. 2 thermal oil heater is 1.3m, the height is 2.6m, and the total length of the heating pipe is 666.06m. The heating tubes are nickel tubes of φ38×2.5, and the heating tubes are arranged in a hexagonal shape. There are 367 heating tubes in total, and the center-to-center distance of the tubes is 57mm.

[0039] The heating pipe is connected with the upper and lower flower boards by the expan...

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Abstract

The invention discloses a caustic soda evaporating method using heat-conducting oil for heating. In the process, high-temperature heat-conducing oil for heating flue gas is introduced a heat-conducting oil heater to evaporate caustic soda. An evaporator consists of an evaporating chamber, the heat-conducting oil heater and a heat-conducting oil furnace, wherein the heater is a tubular heater filled with the high-temperature heat-conducting oil which makes alkali liquid in a heating tube evaporate to produce steam which is used as a heat source for a previous first evaporator. The process can save more than 40 percent of energy than the conventional 6-ton solid caustic soda pot. The process makes operation simple, can be used for continuous production, enables one set of equipment to produce more than 10 ton of caustic soda annually, and is suitable for large-scale caustic soda production. The method also can be used for evaporating other solution without requiring a boiler for supplying steam.

Description

Technical field: [0001] The invention belongs to the field of chemical industry, in particular to a caustic soda evaporation process. Background technique: [0002] In the production of solid caustic soda, the water in the lye needs to be evaporated to obtain solid caustic soda. When the concentration of lye is below 30%, it can be evaporated with an evaporation tank. When the concentration of lye is high, the evaporation tank cannot produce due to the strong corrosion of lye on the equipment and the increase of the boiling point of lye. In order to solve this problem, two processes are generally used; [0003] One is the cauldron method, which is adopted by most domestic manufacturers. There are two kinds of specifications commonly used in large pots, namely, 18-ton pots and 6-ton pots (referring to the number of tons of alkali produced per pot). The characteristics of the cauldron are big, thick, tall and stupid. The 18-ton cast iron cauldron has a diameter of 3m, a d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D1/42
Inventor 康仁
Owner 康仁
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