Descaling method and device for heating coil of reaction vessel

Abstract

The invention provides a descaling method and a device for a heating coil of a reaction vessel. A pipeline for a scale remover storage tank in the device is communicated with a No.1 feed pump, a No.1solenoid valve, a No.1 flowmeter, a safety valve and a liquid mixing pipe. A pipeline for a circulating pool is communicated with a circulating water pump, a No.2 flowmeter, a No.4 solenoid valve anda liquid mixing pipe. The liquid mixing pipe is communicated with a heating coil in the reaction vessel. A pipeline for the heating coil is communicated with a No.2 solenoid valve, a No.3 solenoid valve, an acid-base tester and the circulating pool. A water return pipe for the No.3 solenoid valve is communicated with a No.2 feed pump and the scale remover storage tank. The method is performed according to the following steps: 1, input of process parameters; 2, blending of a scale remover; 3, transport of the scale remover and circulating water; 4, descaling of the heating coil; 5, treatment ofscale-removal water; and 6, water replenishing of the circulating pool. The scale remover in the method is inputted into the heating coil by using corresponding equipment to achieve the scale-removalpurpose. The device has a simple structure, is convenient to use and maintain, and is convenient for promotion and application.

Description

technical field [0001] The invention relates to the field of chemical equipment and reactors, in particular to a method and device for descaling heating coils of reactors. Background technique [0002] Scaling in chemical equipment or pipelines has always been a major problem for people. The hard scale on the tube wall of heat exchange equipment will greatly reduce the parameters of heat exchange, and the scaling of pipelines will affect the operating flow of the heating system. The main hazards of fouling include: the large thermal resistance scale group reduces the heat transfer effect of the heating surface, the temperature rise of the heating surface wall causes the pressure-bearing material to deform or even burst, reduces the effective flow cross-sectional area or even causes blockage, etc. Clean up. When the materials in most chemical and biological material enterprises are reacted in the reactor, the materials in the reactor are usually heated to speed up the reacti...

AI Technical Summary

Problems solved by technology

[0002] Scaling in chemical equipment or pipelines has always been a major problem for people. The hard scale on the pipe wall of heat exchange equipment will greatly reduce the parameters of heat exchange. Scaling in pipelines will affect the operating flow of the heating system.

The main hazards of fouling include: the large thermal resistance scale group reduces the heat transfer effect of the heating surface, the temperature rise of the heating surface wall causes the pressure-bearing material to deform or even burst, reduces the effective flow cross-sectional area or even causes blockage, etc. to clean

When the materials in most chemical and biological material enterprises are reacted in the reactor, the materials in the reactor are usually heated to speed up the reaction speed, because the reactor coil will be violently heated or cooled when the materials in the reactor are heated or cooled. During this process, a lot of scale will be generated in the heating coil, resulting in a decrease in heat exchange efficiency, and the scale on the inner wall of the heating coil is not easy to clean, the resulting defects are due to the heat exchange in the heating coil The decline in efficiency will cause waste of resources and energy in the entire reaction. Second, there will be serious safety hazards in the reaction process, especially the danger of explosion in high temperature and high pressure environments.

[0003] At present, the way of descaling in the prior art is generally to add scale inhibitors, corrosion inhibitors, bactericides and algicides to the circulating water, but the scale inhibitors and corrosion inhibitors do not reduce the ion concentration of scaling factors in the water. The evaporation concentration is getting higher and higher, and the final water change and discharge during cleaning will cause secondary pollution

Using other methods such as ultrasonic method, electronic descaling method, etc., the energy conversion efficiency is low, and only the crystal form of scale is changed, and it cannot reduce the hardness of water quality and prevent the formation of scale

There are also electrochemical treatment technologies such as direct current electrolysis, which have shortcomings such as excessively high voltage, unavoidable polarization effects, and electrolytic efficiency becoming lower and lower after electrode fouling and oxidation, and the overall descaling effect is not very obvious.

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