A kind of salt inhibitor and its preparation method and application

A technology for blocking salt and salt-containing wastewater, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of reducing maintenance costs, reducing sewage disposal costs, and reducing the difficulty of cleaning

Active Publication Date: 2022-07-19
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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  • A kind of salt inhibitor and its preparation method and application
  • A kind of salt inhibitor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a salt inhibitor, in terms of percentage by weight, the salt inhibitor comprises polymaleic anhydride 29%, hydroxyethylidene diphosphonic acid 4.0%, polyaminopolyether methylidene phosphonic acid 5.7%, 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 water.

[0041] This embodiment also provides a preparation method of a salt inhibitor: the above components: polymaleic anhydride 29%, hydroxyethylidene diphosphonic acid 4.0%, polyaminopolyether methylidene phosphonic acid 5.7%, 2-phosphonic acid butane-1,2,4-tricarboxylic acid 2.4%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.6%, polydimethyldiallyl ammonium chloride 1.3%, sodium hydroxide 1.7% and the balance of water are stirred and mixed in an atmospheric pressure reactor to obtain a salt inhibitor.

Embodiment 2

[0043] This embodiment provides a salt inhibitor, which in weight percent comprises polymaleic anhydride 28%, hydroxyethylidene diphosphonic acid 3.8%, polyaminopolyether methylidene phosphonic acid 5.5%, 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 water.

[0044] This embodiment also provides a preparation method of a salt inhibitor: the above components: polymaleic anhydride 28%, hydroxyethylidene diphosphonic acid 3.8%, polyaminopolyether methylidene phosphonic acid 5.5%, 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 an atmospheric pressure reactor to obtain a salt inhibitor.

Embodiment 3

[0046] This embodiment provides a salt inhibitor, in terms of percentage by weight, the salt inhibitor is polymaleic anhydride 30%, hydroxyethylidene diphosphonic acid 4.1%, polyaminopolyether methylidene 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 a preparation method of a salt inhibitor: the above components: polymaleic anhydride 30%, hydroxyethylidene diphosphonic acid 4.1%, polyaminopolyether methylidene phosphonic acid 5.9%, 2-phosphonic acid butane-1,2,4-tricarboxylic acid 2.5%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 2.8%, polydimethyldiallyl ammonium chloride 1.5%, sodium hydroxide 1.8% and the balance of water are stirred and mixed in an atmospheric pressure reactor to obtain a salt inhibitor.

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Abstract

The invention provides a salt inhibitor and 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 Alkaline agent. In the present invention, by adding the salt blocking agent to the salt-containing wastewater, the quench tower can use high salt water during back spraying, thereby saving the cost of clean water. After the salt-containing wastewater with added salt inhibitor evaporates in the quench water tower, the salt usually exists in the form of powder or small particles, and falls off along with the ash, and enters the ash hopper at the bottom of the quench water tower. Due to the lightness of the salt, it reaches the cloth bag Dust collector, which falls off with the fly ash without forming large hard salt clumps. Because there are no large pieces of salt attached to the tower wall, the difficulty of cleaning the quench tower is reduced, the cleaning cycle is prolonged, the operation cycle 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 a preparation method and application thereof. Background technique [0002] The high-temperature exhaust gas generated by the hazardous waste incineration treatment unit needs to be cooled rapidly and then enters the flue gas scrubber to remove the acid gas and other harmful components in the exhaust gas. This rapid cooling process is usually completed in the quench tower. Due to the requirements of green environmental protection, the current hazardous waste incineration treatment devices generally use the salt-containing wastewater from the flue gas scrubbing tower to be sprayed back into the quenching tower to achieve quenching of the high-temperature exhaust gas. At the same time, the salt in the wastewater is precipitated at the bottom of the quenching tower. Realize the dual functions of flue gas quenching and salty wastewater treatme...

Claims

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Application Information

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Patent Type & Authority Patents(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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