In September 2020, China put forward a new goal of addressing climate change, "strive to achieve carbon peak by 2030 and achieve carbon neutrality by 2060".

Energy conservation and environmental protection have become the basic national policies of our country. Vigorously promote centralized heating and waste heat utilization, continue to promote clean heating transformation, expand the scope of centralized heating, and promote coal replacement with gas, electricity, heat, and centralized production according to local conditions. Materials and other clean heating methods to promote the sustainable development of urban central heating.

Project Overview

This project is to recover the waste heat from the carbon plant to centralize the heating of the town.

The return water of the heating pipe network is first heated by the condenser, then heated by the peak heater in the factory, and then heated externally by the municipal heating pipe network. However, the urban heating heat pipe network system is huge and the pipeline is complicated. The temperature has dropped sharply, and even sediment and other sundries appear, causing damage to heating equipment and clogging of heat exchangers, which seriously affects the safety of heating supply. Therefore, filters are installed on the main pipeline and each branch pipeline to purify the water supply quality.

Pipe network water quality requirements

According to the "Code for Design of Urban Heating Pipeline Network" (CJJ34-2010), the water quality of the pipe network supply should meet the following requirements:

【Oil】：≤2mg/L

【Turbidity】：≤5mg/L

【Hardness】: ≤0.6mmoL/L

【Dissolved Oxygen】：≤0.1mgL

[CL-content]: <25ppm

[Equipment pH (25°C)]: 7-11

In order to ensure that the water quality of the pipe network meets the standards and the normal operation of other equipment, self-cleaning filters are installed in the first station and the pressurization station.

Self-cleaning filter decontamination principle

The self-cleaning filter has the function of filtering raw water and automatically cleaning and discharging the filter element, and the system supplies water continuously during cleaning and discharging.

Set the filtration time on the timer. When the filtration time is up, the sewage discharge will be started. At the same time, the control system will compare the system pressure difference with the pressure difference set by the user in real time. When the system pressure difference reaches the set pressure difference, the filter will also start Clean the sewage.

When the sewage discharge time is up, stop cleaning, and the system returns to its initial state, ready for the next filtration process, to ensure regular removal of impurities in the pipe network.

Function of self-cleaning filter in heating pipeline

The self-cleaning filter has a PLC remote control program, real-time feedback on the operation of the equipment, automatic monitoring with the pipeline network, automatic flushing and sewage discharge, which greatly improves work efficiency, reduces labor costs, and improves the reliability and safety of the pipeline network and equipment operation. .

Introducing waste heat from carbon plants for centralized heating is an effective measure to save energy, reduce urban energy consumption, improve urban environmental quality, and improve people's living standards. Lifelt is keeping a close eye on the goals of "carbon peak" and "carbon neutrality", Constantly accelerate the pace of technological innovation and make more contributions to a beautiful China!