Salt inhibitor as well as preparation method and application thereof

A technology of blocking salt and acrylic acid, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. , to achieve the effect of reducing sewage disposal costs, reducing maintenance costs, and reducing the difficulty of cleaning

Active Publication Date: 2021-06-08
山东凯立清环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hazardous waste plants use high salt water in the quench tower to spray the flue gas to cool down. This method effectively reduces the amount of softened water used and reduces the treatment cost, but there are also certain problems. For example, the high salt water sprayed in the quench tower In the process of showering and cooling, rapid evaporation and crystallization are very likely to form large hard scales, which adhere to the inner wall, causing blockage of the flue gas passage, and causing unexpected shutdown of the instrument
Therefore, the status quo of the operation of the hazardous waste quenching tower is: the quenching tower can only be sprayed back with clean water or soft water, and the treatment cost is high; back spraying high-salt wastewater will cause agglomeration on the inner wall of the quenching tower, which is difficult to clean, the spray gun is easy to block, and the spraying effect is poor , the spray gun has a short service life

Method used

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  • Salt inhibitor as well as preparation method and application thereof
  • Salt inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a salt inhibitor, which includes 29% polymaleic anhydride, 4.0% hydroxyethylidene diphosphonic acid, 5.7% polyamino polyether methylene phosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid 2.4%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.6%, polydimethyldiallylammonium chloride 1.3% , 1.7% sodium hydroxide and the balance being water.

[0041] This embodiment also provides the preparation method of the salt inhibitor: the above-mentioned components: 29% of polymaleic anhydride, 4.0% of hydroxyethylidene diphosphonic acid, 5.7% of polyamino polyether group methylene phosphonic acid, 2-phosphonic acid Butane-1,2,4-tricarboxylic acid 2.4%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.6%, polydimethyldiallylammonium chloride 1.3%, sodium hydroxide 1.7% and the balance of water are stirred and mixed in a normal pressure reactor to prepare the salt inhibitor.

Embodiment 2

[0043] This embodiment provides a salt inhibitor, which includes 28% polymaleic anhydride, 3.8% hydroxyethylidene diphosphonic acid, 5.5% polyamino polyether methylene phosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid 2.0%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.5%, polydimethyldiallylammonium chloride 1.0% , 1.5% sodium hydroxide and the balance being water.

[0044] This embodiment also provides the preparation method of the salt inhibitor: the above-mentioned components: 28% of polymaleic anhydride, 3.8% of hydroxyethylidene diphosphonic acid, 5.5% of polyamino polyether group methylene phosphonic acid, 2-phosphonic acid Butane-1,2,4-tricarboxylic acid 2.0%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.5%, polydimethyldiallylammonium chloride 1.0%, sodium hydroxide 1.5% and the balance of water are stirred and mixed in a normal pressure reactor to prepare the salt inhibitor.

Embodiment 3

[0046] This embodiment provides a salt inhibitor, by weight percentage, said salt inhibitor polymaleic anhydride 30%, hydroxyethylidene diphosphonic acid 4.1%, polyamino polyether group methylene phosphonic acid 5.9%, 2 -Phosphonobutane-1,2,4-tricarboxylic acid 2.5%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.8%, polydimethyldiallylammonium chloride 1.5%, Sodium hydroxide 1.8% and the balance water.

[0047] This embodiment also provides the preparation method of the salt inhibitor: the above components: polymaleic anhydride 30%, hydroxyethylidene diphosphonic acid 4.1%, polyamino polyether group methylene phosphonic acid 5.9%, 2-phosphonic acid Butane-1,2,4-tricarboxylic acid 2.5%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.8%, polydimethyldiallylammonium chloride 1.5%, sodium hydroxide 1.8% and the balance of water are stirred and mixed in a normal pressure reactor to prepare the salt inhibitor.

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Abstract

The invention provides a salt inhibitor as well as a preparation method and application thereof. The salt inhibitor comprises organic phosphonic acid, organic carboxylic acid, polymaleic anhydride, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid and an alkaline agent. According to the invention, the salt inhibitor is added into salt-containing wastewater, so that high-salt water can be used during back spraying of a quench tower, and the clear water cost is saved. After the salt-containing wastewater added with the salt inhibitor is evaporated in the quench water tower, salt usually exists in a powder or small particle shape, falls off along with ash, enters an ash hopper at the bottom of the quench water tower, reaches a bag-type dust collector due to the fact that the salt is light, falls off along with fly ash, and cannot form large and hard salt blocks. As no large salt blocks are attached to the interior of the tower wall, the difficulty of cleaning the quench tower is reduced, the cleaning period is prolonged, the operation period is prolonged, and the operation cost is reduced.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment, and in particular relates to a salt inhibitor and its preparation method and application. Background technique [0002] The high-temperature exhaust gas produced by the hazardous waste incineration treatment device needs to be cooled rapidly and then enter the flue gas scrubber to remove acid gases and other harmful components in the exhaust gas. This rapid cooling process is usually completed in the quench tower. Due to the requirements of environmental protection, the current hazardous waste incineration treatment device generally uses the salty wastewater from the flue gas scrubber to be sprayed back into the quenching tower to realize the quenching of high-temperature exhaust gas, and at the same time, the salt in the wastewater is precipitated at the bottom of the quenching tower to become ash. Realize the dual functions of flue gas quenching and saline wastewater treatment. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/14C02F1/12C02F1/16
CPCC02F5/105C02F5/145C02F1/042C02F1/16C02F1/12
Inventor 陶新锋王晓辉
Owner 山东凯立清环境科技有限公司
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