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Efficient desulfurization waste liquid salt extraction recovery device

A desulfurization waste liquid and salt recovery technology, which can be used in filtration loops, fixed filter element filters, filtration and separation, etc. It can solve the problems of reduced adsorption and filtration effect, short operation cycle, difficult maintenance, etc., and achieve an increase in filtration specific surface area. , The effect of improving the filtration capacity, convenient installation and maintenance

Active Publication Date: 2016-05-18
PINGXIANG HUAXING ENVIRONMENTAL PROTECTION ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing desulfurization waste liquid is mainly filtered by two-stage filtration of coke and microporous ceramic tubes. The main problem of this two-stage filter device is that after a period of treatment by the first-stage coke filter device, due to the adsorption of desulfurization waste liquid by coke After the insoluble degradation products in the medium, it is easy to deposit on the surface and inside of the coke to form passivation, block the filter pores, thereby reducing the adsorption and filtration effect. The coke filter device cannot be backwashed and regenerated, and the coke must be replaced regularly, which increases the processing time. Cost; Coke filtration has disadvantages such as huge equipment, large floor space, difficult maintenance, short operation period and poor treatment effect due to inability to backwash, which seriously restricts the performance of the entire desalination system
The two-stage microporous ceramic tube filter device is a new high-efficiency filtration process. At present, there are many microporous ceramic tube filter devices used for industrial waste liquid, but most of the existing microporous ceramic tube filter devices are waste liquid entering the ceramic tube first. , and then seep from the inside of the tube to the outside of the tube. The biggest disadvantage of this method is that a large amount of refractory substances accumulate in the tube, which is easy to cause blockage, and the pressure difference between the inside and outside of the tube is large, causing the filter tube to burst and seriously affecting the filtration and seepage of the off-flow waste liquid. , reducing the filtering effect
Secondly, most of the existing microporous ceramic filter devices are fixed in both directions up and down, the structure is relatively complicated, the processing, installation and maintenance are inconvenient, and the cost is high

Method used

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  • Efficient desulfurization waste liquid salt extraction recovery device
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  • Efficient desulfurization waste liquid salt extraction recovery device

Examples

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Embodiment 1

[0019] Example 1, the high-efficiency desulfurization waste liquid salt extraction recovery device is composed of extraction, evaporation, heat preservation, cooling, crystallization and filtration treatment devices combined according to a certain process flow, including a two-stage filter device (coarse filter and fine filter) Filtration), the two-stage filter device is formed by connecting two microporous ceramic filter devices, such as figure 1 , image 3 with Figure 4 The first kind of microporous ceramic filter device is shown. The microporous ceramic filter device includes a tank body 5 and a head 1 made of stainless steel. The lower part of the tank body is provided with a liquid inlet 6 and a sewage outlet 7 for desulfurization waste liquid. The upper part of the tank body is provided with a liquid outlet 8, the tank cover is provided with a backwash port 9 and an exhaust port 10, the backwash port communicates with the liquid outlet, and a stainless steel support pl...

Embodiment 2

[0020] Embodiment 2, the microporous ceramic filter device described in embodiment 2 except as figure 2 with Figure 5 The structure shown is different from the microporous ceramic filter device of the first structure, and the other structures are the same as those in Embodiment 1. In order to remove particulate impurities in the desulfurization waste liquid entering the microporous filter device more cleanly, ensure that the microporous ceramic tube is not easy to block, improve the filtering effect of the microporous ceramic tube, prolong the filtration period of the microporous ceramic tube, and improve the filtration efficiency , before carrying out the microporous ceramic filtration treatment, pre-filter treatment is carried out, that is, the bottom of the microporous ceramic tube is provided with a base plate 26, a cover plate 20, a liquid pipe 21, a sewage pipe 23 and a separation plate 24 all made of stainless steel. The filter chamber 27 with a liquid port 25, the s...

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Abstract

The invention discloses a high-efficiency desulfurization waste liquor salt extraction recycling device. The device comprises a two-stage filtering device formed by connecting two micro-porous ceramic filtering devices with each other, wherein each micro-porous ceramic filtering device comprises a tank body (5) and a seal head (1); a liquid inlet (6) is formed in the lower part of the tank body; a liquid outlet (8) is formed in the upper part of the tank body; a backwash opening (9) is formed in the liquid outlet; a supporting disc (2) is arranged in the tank body; liquid outlet holes (19) are formed in the supporting disc at intervals; limiting sleeves (3) are fixedly arranged on the lower bottom surface of the supporting disc at intervals; the limiting sleeves are tightly connected with the outer diameters at the upper ends of micro-porous ceramic pipes in a matched mode; the micro-porous ceramic pipes are connected with a pressing plate (13); a riding fixing rack (18) is fixedly arranged on the supporting disc; and pull rods (15) through which the micro-porous ceramic pipes can be fixedly arranged on the supporting disc in a suspended mode at the intervals are arranged between the riding fixing rack and the pressing plate. According to the device disclosed by the invention, the occupied space can be reduced, the construction cost is saved, the filtering effect of desulfurization waste liquor can be improved, desulfurization liquor is conveniently filtered, and the backwash is conveniently performed.

Description

technical field [0001] The invention relates to a waste liquid purification and recovery device, in particular to a high-efficiency desulfurization waste liquid salt extraction and recovery device. Background technique [0002] In the desulfurization of coking plants using ammonia as the alkali source and the use of dinuclear ammonium phthalocyanine cobalt sulfonate (PDS) catalysts, the salt content in the desulfurization liquid will gradually increase. When the salt content reaches 250g / L or more, the desulfurization efficiency will increase. reduce. Therefore, part of the desulfurization liquid (desulfurization waste liquid) must be discharged outside during the desulfurization process, and part of the new ammonia liquid must be added to control the salt content in the desulfurization liquid within the specified requirements, thereby ensuring the desulfurization effect. The discharged desulfurization waste liquid contains ammonium thiocyanate, ammonium thiosulfate, ammoni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/96B01D29/52B01D29/33B01D36/00
Inventor 李绍明余仁生李波李斌
Owner PINGXIANG HUAXING ENVIRONMENTAL PROTECTION ENG TECH CO LTD
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