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Pretreatment method for circulating water

A technology of pretreatment and circulating water, applied in the directions of multi-stage water treatment, water/sewage treatment, neutralized water/sewage treatment, etc. The number of maintenance, the elimination of the existence of microorganisms, the effect of the safety of the production process

Inactive Publication Date: 2017-10-20
江苏道明化学有限公司
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Problems solved by technology

[0003] In these heat exchange equipment, the more commonly used cooling medium is circulating water. The traditional process is to transport natural water such as river water to a circulating pool of thousands of cubic meters. The circulating pool is equipped with a cooling water tower, and the circulating water is transported to each Users, due to the natural water quality containing a variety of microorganisms, chloride ions, etc., after a long period of operation, scaling in these heat exchange equipment will cause blockage of the tubes, and in severe cases, the device will stop production or even a production accident

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0015] A pretreatment method for circulating water, comprising the following steps:

[0016] 1) Destruction of sodium azide: waste water contains sodium azide, which is toxic and highly explosive, so pretreatment with aqueous sodium sulfite solution is used to destroy sodium azide;

[0017] 2) The first adjustment pool: mix the pretreated wastewater to make the water quality and quantity uniform, and adjust the pH to about 7;

[0018] 3) Multi-effect evaporation: The waste water exchanges heat with steam in the heater, and then enters the separator. The water and low boiling components in the waste water are separated, and the high boiling components are the raffinate. The heating steam is passed into the evaporator, and the resulting The secondary steam can still be used as a heat source and introduced into the second evaporator. The heating chamber of the second evaporator is the condenser of the first evaporator. Multiple evaporators are connected to operate simultaneously ...

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PUM

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Abstract

The invention discloses a pretreatment method for circulating water. According to the invention, a set of a circulating water treatment system is added based on a conventional process, by monitoring on line the content of all kinds of microorganisms and micro ions in a circulating water pool, a proper amount of a water treatment agent is added at a right time, the microorganisms are prevented from existing in the circulating water, the micro ions are transformed to other filterable materials with large particle sizes, and the pretreated circulating water passes through a filtration system and conveyed to every user. Practice proves that after the circulating water passes through the water treatment system, scaling conditions in all kinds of heat-exchange equipments are remarkably improved, and the maintenance frequency of a production device which adopts the pretreatment method is less than that of a device in a conventional process, and the production process of the production device is more safe, high-efficiency and stable than that of the device in the conventional process.

Description

technical field [0001] The invention belongs to a pretreatment method for circulating water. Background technique [0002] In the DCP production process, some sections need to use shell and tube heat exchangers, and some reactors are equipped with jackets or coils. These heat exchange equipment are designed to pass through two or more gas or solid phase media. The heat exchange meets the relevant requirements of the production process. [0003] In these heat exchange equipment, the more commonly used cooling medium is circulating water. The traditional process is to transport natural water such as river water to a circulating pool of thousands of cubic meters. The circulating pool is equipped with a cooling water tower, and the circulating water is transported to each Users, due to the natural water quality containing a variety of microorganisms, chloride ions, etc., after long-term operation, scaling will form in these heat exchange equipment, causing blockage of the tubes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/048C02F1/66C02F3/02C02F3/28C02F2301/08
Inventor 阎洛成林定多万浥尘刘宏光
Owner 江苏道明化学有限公司
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