Environmental protection for visiting domestic garbage

Since July 2021, all the 10 original domestic waste landfills in Shijiazhuang City have all stopped using it. All daily domestic waste produced by citizens has been transported to incineration power plants for incineration treatment. According to the work plan formulated by the Provincial Department of Housing and Construction, our province will achieve full coverage of urban and rural domestic waste incineration this year.

Why do domestic waste incineration treatment methods replace the traditional landfill?

Burning domestic waste in addition to power generation,

Will it cause pollution to the environment?

June 14th,

The reporter came to China Energy Energy (Shijiazhuang) Environmental Energy Co., Ltd.

(The following is referred to as the China Energy Conservation Company),

Visit the environmental protection journey of domestic garbage.

Waste clearance vehicle unload the garbage into the garbage warehouse

Domestic garbage is first fermented and burned after fermentation

Slightly negative pressure control of garbage warehouses to avoid odor pollution environment

At 11 o'clock on June 14, a garbage cleared car printed with the words "Shijiazhuang Mayor An District Environmental Health Brigade" drove into the unloading channel of the central energy -saving company. Unload the garbage. After the garbage was put in the warehouse, the door was closed. In the control room of garbage crane, the bridge grabbed the driver Wang Zhuojun to operate the garbage crane and captured the new material area that had just been unloaded.

The garbage warehouse is 42 meters long, 21 meters wide, 13 meters deep, and the maximum capacity is 10,000 tons of garbage. This number is equivalent to the total domestic garbage produced by Shijiazhuang City for 3 days. There is only one glass wall control room from the garbage warehouse. Two bridges catch the driver to operate two garbage cranes, one is responsible for the stirring, stacking, and stacking of the new warehouse domestic garbage. Essence

Ge Shuo Shuai, the Minister of the Production Management Department of the China Energy Energy Company, told reporters that the garbage in the warehouse adopts the principle of storage in order in order. Essence The newly entered warehouse's domestic garbage must be piled in the garbage warehouse for 5-7 days before entering the incineration. This is because the daily domestic garbage produced by residents contain wet garbage such as peel, leftovers and leftovers. These garbage content is high. After the accumulation and fermentation process are analyzed, it can increase the heat value of garbage and increase power generation. Essence

Staff check whether the equipment runs normal

At the same time, the precipitated water (leachate) can be used for irrigation after the water treatment system is treated to achieve standard discharge.

On the hot summer, if the trash can in the residential community is not dumped in time, the smell of acid rot will flow out, and the past residents will cover their noses and leave quickly. But in the control room of the garbage warehouse, the reporter did not smell any strange smell. Ge Shuo Shuai told reporters that this is because the garbage warehouse has always maintained a slight negative pressure to avoid the smelly diffusion and pollution environment caused by garbage fermentation. These stinks will also be delivered to the furnace to help the fans to increase the combustion effect.

The bridge grab the driver to grab the garbage and grasp the garbage

Relax of garbage investment can increase power generation evenly

The reporter's opinion is not easy to catch the garbage in such a large garbage warehouse to accurately catch the garbage. Because the length of the garbage warehouse is 42 meters, the hands of the driver and the eyes of the bridge must be perfectly coordinated to control the operation of the garbage crane. Once the operation is wrong, it may cause two garbage crashes to collide, which triggers production safety accidents.

Bridge catching driver Wang Zhuojun has worked in this post for more than ten years. He told reporters that the location of the garbage hanging by ordinary people will have a deviation of 3 meters from the actual location. The garbage hanging driver must go through strict training to work. The uniformity of garbage stirring, the flatness of stacking, and the uniformity of the feeding are important factor that affects whether the garbage can be fully burned in the later stage. "Deep dug, high pile, orderly" is a working criterion for a qualified bridge to catch the driver.

Garbage Display screen

On the right side of Master Wang Zhuojun, another bridge grabbed the driver Zhang Xuzheng operated the garbage crane to catch the garbage port in the furnace area. When you see the garbage hanging in the garbage, you will move before and after the portal, and cooperate with a shake. Zhang Xu told reporters that the garbage hanging can grab the garbage of about 6 tons at a time, and the garbage in the furnace must be uniform and loose, which can improve the quality of garbage combustion and increase power generation. Waste clearance vehicle drives out of domestic waste incineration power plant unloading channels

Waste incineration can generate heating and heating

Realize harmlessness, reduction, resourceization

Zhang Xu continued to operate the garbage hanging and put the garbage into the feeding bucket. These garbage had to go through three stages of the furnace in the incinerated furnace, which were the drying sections, combustion sections and burning sections. The high -temperature flue gas generated during the processing of domestic waste incineration is hot exchange in the remaining heat boiler, generating overheating steam, a large amount of steam pushed the turbine to turn, and the co -connected generator also turns. Converted into electricity. Electric energy enters the national power grid system to be transported to various places to achieve the resource of domestic waste incineration treatment.

Subsequently, the reporter followed the staff to the central control room. This was the "brain" of waste incineration power generation. All instructions were issued here. There are four furnaces on the furnace of the lobby display in the furnace, and the computers in front of the staff show thousands of data. They can monitor the combustion and equipment in the furnace through the computer for 24 hours, and adjust the combustion of garbage in the furnace at any time according to the monitoring situation. In controlling state. The quality of the waste incineration is finally feedback. The power generation can be generated after being fully burned per ton of garbage.

Except for power generation, after being fully incinerated, 20%-25%of the scum generated by domestic waste can be used as environmentally friendly building materials. Some thermal energy generated by waste incineration can also be heated by vapor pumping.

In terms of environmental protection, the flue gas generated after domestic waste will be treated with a flue gas treatment system. Through scientific means, pollutants such as acidic substances, particulate matter, nitrogen oxides, heavy metals, and dual villain in flue gas can be effectively removed and achieved to achieve it to reach The stricter standards are discharged later; the fly ash generated during the processing of flue gas, which will be transported to the landfills for harmless landfills after curling and stability.

Understand the classification of garbage, better application on garbage treatment

At present, China -Energy -saving companies can incinerate 1.1 million tons of domestic waste each year, 500,000 tons of calories, and 270 million kilowatt -hours of power generation. As a heating supporting unit of Shijiazhuang Equipment Manufacturing Industrial Park, this enterprise can also provide industrial steam for 33 enterprises in the park, replacing the small coal -fired boilers of various companies in the park, and heating for surrounding residents, ensuring daily heating of residents The demand has achieved the resource utilization rate of waste incineration power generation projects that can be reduced by reducing heat power connections.

"Green incineration" of garbage treatment

Our province will achieve full coverage of urban and rural domestic waste incineration this year

Compared with the traditional garbage landfill method, the same garbage treatment, the land area required for the waste incineration plant is only 1/20-1/15 of garbage hygiene landfills, occupying less land, saving land resources; at the speed of processing speed; On the top, the decomposition time of garbage in the sanitary landfill usually takes 7-30 years, and the incineration processing can be processed in about 2 hours as long as the melting point of the garbage is less than 850 ° C. The amount is 30%, and the amount of incineration can be reduced by about 80%-90%; the pollution generated by waste incineration is only about 1/50 of waste hygiene landfill; incineration waste can also be replaced to electric energy reuse, with an average of 5 people per person. Domestic waste can meet the daily electricity needs of 1 person by incineration and power generation ... Domestic waste incineration treatment has truly achieved harmless, reduced weight, and resource -based.

Grab the driver to operate the garbage crane and put the fermented garbage into the incineration furnace

The reporter learned from the Shijiazhuang City Urban Management Bureau that since July 2021, all the 10 domestic waste landfills in the city have stopped using it, and no longer receive native domestic garbage. All domestic waste is transported to incineration treatment facilities for incineration treatment, which is harmless. The treatment rate reaches 100%. At present, Shijiazhuang has been completed in 8 stones for the processing facilities of domestic waste incineration power generation. The total processing capacity has reached 9,100 tons/day, and the garbage incineration facilities of 5 garbage treatment facilities in east, west, south, north, and middle are initially formed. Full coverage of waste incineration. By the end of 2021, 69 domestic waste incineration power plants have been built in our province. The total processing capacity of the province will reach 67,500 tons/day, and the daily incineration treatment rate will reach 90%, ranking among the forefront of the country.

Adjust the combustion of garbage in the furnace at any time according to the monitoring situation.

Recently, the Provincial Department of Housing and Construction formulated a work plan, requiring to continue to promote the harmless treatment of domestic waste, make up for the shortcomings of domestic waste incineration treatment capacity, accelerate the construction of waste incineration treatment facilities, shut down all domestic waste landfills, , Comprehensively build a system of advanced craftsmanship, reasonable layout, and comprehensive coverage of domestic waste incineration treatment systems, and promote the transformation of the province's domestic waste treatment from landfill to "green incineration".

According to the plan, this year's province will build 17 domestic waste incineration treatment facilities, and simultaneously shut down the remaining 22 domestic waste landfills to achieve full coverage of urban and rural domestic waste incineration treatment.At the same time, the governance of 126 domestic garbage landfills in the province was completed to prevent pollution of groundwater.■ Reporter: Ha Xin

■ Shooting/editing: Zheng Rongxi

■ Edit: Dong Jie

■ Responsible editor: Wang Shujun

■ Supervision: Li Jianhui Hu Xiaolong

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