Plate-type falling film evaporator
A falling film evaporator, plate-type technology, applied in the field of plate-type falling film evaporator, can solve the problems of spot welding spot intergranular corrosion, plate tensile corrosion, heating plate sinking, etc., to achieve uniform steam distribution and impact resistance Good, non-deformable effect
Inactive Publication Date: 2013-07-17
ZHANGJIAGANG RENHENG ENVIRONMENTAL PROTECTION EQUIP CO LTD
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AI Technical Summary
Problems solved by technology
2. Tensile corrosion of plates and intergranular corrosion of spot welds
3. How to enhance the support rigidity inside the equipment, improve the compressive strength of the heating plate, and solve the problem of sinking and deformation of the heating plate caused by the downward flow of steam and high-concentration black liquor on the heating plate
Method used
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[0015] The specific content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] Such as Figure 1 to Figure 2 As shown, a plate type falling film evaporator includes: a housing 1, a steam outlet 101 is arranged on the housing 1, a demister 2 is arranged below the steam outlet 101, a solution outlet is arranged at the bottom of the housing 1, and the housing 1 There is a heating plate group 5 which is mainly welded by several heating plates 501 and several brackets 502. The heating plate 501 is provided with a steam inlet and a condensed gas condensate outlet. The upper end of the heating plate group 5 is provided with a steam distribution Device 6, the lower end of the heating plate group 5 is provided with a condensed gas and condensed water exporting device, a film distributor 3 is provided above the heating plate group 5, and a liquid inlet pipe 4 is provided above the film distributor 3...
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The invention discloses a plate-type falling film evaporator, comprising a shell, a demister, a film distribution device, a liquid inlet pipe, a heating plate sheet group and a condensed gas and condensed water guiding device, wherein the heating plate sheet group mainly formed by welding a plurality of heating plate sheets and a plurality of brackets is arranged in the shell; each heating plate sheet is provided with a steam inlet and a condensed gas and condensed water outlet; the upper end of the heating plate sheet group is provided with a steam distribution device; the steam distributiondevice adopts the design of pipe-type steam multistage distribution; the heating plate sheets are welded by two heating plates of which the middle extrusion height is 10-15mm, and welding spots are intensively distributed; the heating plate sheets are mae of 00cr19Nil0. Because the design of pipe-type steam multistage distribution is adopted, steam is evenly distributed, high temperature caused by gas supply temperature and pressure improve as well as deformation and damage caused by expansion caused by heat and contraction caused by cold has small possibility of happening, and the plate-typefalling film evaporator is convenient to overhaul. Because of smaller pressure blasting height of the heating plate sheets and intensive welding spots, the pressure bearing capability of the heating plate sheet is improved.
Description
technical field [0001] The invention relates to a plate type falling film evaporator for a high-concentration crystallization evaporation process. Background technique [0002] The black liquor evaporated by the plate falling film evaporator in the paper industry needs to enter the alkali recovery furnace for combustion. The improvement of black liquor concentration (dry solids) in the furnace can obtain obvious benefits: (1) Combusting super-concentrated black liquor with high solids greatly improves the thermal efficiency of the alkali furnace, increases the steam production of high-pressure steam, and improves The power generation of the power plant is improved, and the operation of the alkali recovery boiler is safer and more stable. (2) Due to the reduction of the evaporation of the black liquor after entering the furnace, the fouling degree on the surface of the superheater of the alkali furnace is greatly reduced, and the heat transfer rate of the superheater is effe...
Claims
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IPC IPC(8): B01D1/00B01D1/22
Inventor 朱伟沈滨
Owner ZHANGJIAGANG RENHENG ENVIRONMENTAL PROTECTION EQUIP CO LTD