Scale dispersant for water scrubber and application method of scale dispersant
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A scale inhibitor and dispersant, water washing tower technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc.
Active Publication Date: 2017-05-31
天津市瑞德赛恩新材料开发有限公司
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[0009] In order to overcome the deficiencies of existing antiscaling and dispersing agents, the present invention provides a kind of antiscaling and dispersing agent for water washing tower and its application method
Method used
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Embodiment 1
[0021] Add 4g of polyethylene glycol 200, 3g of sodium dodecylbenzenesulfonate, 30g of polyoxyethylene polyoxyethylene ether phosphate (n=3), 30g of dodecyldiethanolamide, and 33g of deionized water into the reactor , stirred at room temperature for 1 hour and then filtered to obtain the scale inhibitor dispersant.
[0022] 1) Determination of dispersion rate: Take 50ml of distilled water and put it into a beaker, add the antiscalant dispersant of the water washing tower, shake it well, put it in a water bath at 60°C, and keep the temperature constant for 30 minutes; weigh about 1g of the scale and put it into the above solution, and stir at a constant temperature 30min. At the same time, a blank water sample comparison experiment was carried out.
[0023] Calculate the dispersion efficiency of the antiscalant dispersant for the water washing tower according to the following formula.
[0024]
[0025] m0: the amount of initial scale, g
[0026] m1: amount of scale substa...
Embodiment 3
[0032] Add 4g of maleic anhydride, 35g of sorbitan monostearate, 35g of sodium lignin sulfonate, and 26g of deionized water into the reaction kettle, stir at room temperature for 1 hour, and then filter to obtain a scale-inhibiting dispersant. Use this scale-inhibiting dispersant to make In the dispersion experiment, the dispersion efficiency is 62.4%.
Embodiment 4
[0034] Add 5g of maleic anhydride, 40g of polyoxyethylene sorbitan monooleate, 40g of lauryl alcohol, and 15g of deionized water into the reaction kettle, stir at room temperature for 1 hour, and then filter to obtain a scale-inhibiting dispersant. Use this scale-inhibiting dispersant to disperse Experimentally, the dispersion efficiency is 58.6%.
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Abstract
The invention discloses a scale dispersant for a water scrubber. The scale dispersant is obtained through mixing and stirring the raw materials in percentage by weight: 1-5% of a dispersing agent, 30-40% of an emulsifier, 30-40% of a penetrant and the balance of solvent at room temperature for an hour and then filtering. An injection point of the scale dispersant is in front of an overhead circulating pump of the water scrubber. The additive amount of the scale dispersant for the water scrubber is 200-500ppm and the scale dispersant is continuously injected. The scale dispersant for the water scrubber has the beneficial effects that scales left in the water scrubber and a heat exchanger can be greatly reduced, the differential pressure of the water scrubber is obviously reduced, the efficiency of the heat exchanger is greatly improved and the cleaning period of the heat exchanger can be prolonged twice.
Description
[0001] 1. Technical field [0002] The invention relates to a scale-inhibiting dispersant, in particular to a scale-inhibiting dispersant for a water washing tower and a use method thereof. [0003] 2. Background technology [0004] Quenching stripping system in the MTO section. The system mainly includes a quenching tower, a water washing tower and a sewage stripping tower. The reaction gas from the reaction system passes through the quenching tower and the water washing tower to remove superheat and wash the catalyst, and condenses most of the water before sending it to the downstream olefins. Separation device for separation and refining. The purified water comes from the bottom of the sewage stripper in the MTO unit. Catalyst dust and a small amount of heavy oil contained in the quench water and washing water will inevitably exist in the purified water, causing the saddle packing in the washing tower to block. The material in the washing tower is biased, and the purified w...
Claims
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