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Anhui Daily: Green evolution of coal city

Source: 2020-08-25 09:29:55

Huaibei City takes the road of ecological priority and green development, making the former "mining city" covered by coal ash into a "Park City" with mountains and rivers in the city and the city in the mountains and rivers——

Green evolution of coal city

Ding Xianfei, reporter of Anhui Daily

Photo by Yue Jianwen of Lujin lake after treatment of subsidence area

Photo by Chen Wenxiao, carbon valley lake wetland park, Huaibei

As a well-known coal resource-based city and energy base in China, Huaibei has contributed more than 1 billion tons of raw coal and hundreds of billion kwh of power transmission for the country since its establishment 60 years ago. It has also paid heavy costs such as sharp reduction of resources and deterioration of ecological environment. Since the 18th National Congress of the Communist Party of China, Huaibei City has established the development strategy of "China's carbon Valley, green gold and Huaibei" and the overall development idea of "123455". It adheres to ecological priority and green development, adheres to the people-oriented and integration of industry and city. It has successfully turned the former "mining city" with coal ash blocking the sun into a "Park City" with mountains and rivers in the city and the city in the mountains and rivers, and won the Chinese Environmental Excellence Award National Civilized City, National Forest City and green model city.

Treating "scars"

"Dream come true" blue water and blue sky

Located in the urban area of Huaibei City, lvjin lake has made a spectacular appearance in front of Huaibei citizens in 2019. Its predecessor is the coal mining subsidence area, which is covered with ash on sunny days and mud on rainy days.

After careful management, great changes have taken place here. Nowadays, it has become a city central park integrating ecological restoration, resource protection, scientific research, tourism and leisure.

"There are blue water and blue sky, fish playing in the water, laughter and Lang Lang...." Mr. Ji, who lives in Vancouver City, Huaibei City, now often takes a walk on Yuanmeng island in lvjin lake.

According to reports, after reasonable planning, design and comprehensive treatment, the lvjin lake has become the largest artificial lake in the prefecture level cities in China, and has become the intermediate link between the old western city and the new eastern city in Huaibei. The 24500 mu of usable land formed by the treatment can accommodate about 80000 people, and 8000 mu of construction land can be sold. The expected direct income is 30 billion yuan to 50 billion yuan.

Once upon a time, Huaibei's strong body left many "scars" due to coal mining, which became the most serious "problem" and the biggest "pain point" of the city's development. In the face of the problem of different depth of subsidence, Huaibei proposed to do the "water article", based on the "deep lake to Lake, shallow farmland, not deep lotus planting" scheme, the subsidence area formed by the mining of 6 pairs of mines in Huaibei mining industry was deeply excavated to make lake; for the shallow area with subsidence depth less than 0.5 m, the method of "pushing high and filling low" to level the land was adopted to increase the effective cultivated land area; for the subsidence depth of 0.5 m, the effective cultivated land area was increased For areas within 2 m to 2 m, the method of "digging deep and filling shallow" is adopted to dig ponds to develop planting and breeding industry, so as to turn the abandoned land into a "cornucopia".

Water is the soul of a city. The reporter learned that Huaibei City has vigorously promoted the transformation of coal mining subsidence areas. It has made use of 4000 hectares of permanent water surface of coal mining subsidence to adjust measures to local conditions and turn harm into profit. It has successively carried out treatment projects such as Nanhu Lake, lvjin lake and carbon valley lake, forming a national urban wetland park with an area of 50 square kilometers in the center of the city.

In this process, Huaibei city promotes the transformation of urban development logic from "producing city people" to "human city producing". In the Central Lake belt composed of carbon valley lake, Lujin lake and South Lake, and the ecological green veins connected by Nanshan, Liuyuan and Longji mountain, Huaibei City plans to build green gold technology innovation corridor, and embeds scientific research institutes, science and technology innovation centers, and high-level talent apartments beside the beautiful lakeside Shi, in the Castle Peak shade layout of new materials, new energy batteries and other innovative industries, with good ecological advantages to promote investment, talent and talent, promote high-quality development.

Big data power

Coal mining is more intelligent

For a long time, coal mining industry has been criticized for its high intensity and high risk operation mode. In recent years, Huaibei Mining Group has vigorously promoted the construction of green mines, taking intelligence as an important starting point, and has explored a new way to promote the economic development of mines and effectively protect the ecological environment of mines.

According to the relevant person in charge, the intelligent mining working face of the group can realize "unmanned" in conventional operations such as coal cutting, frame moving and sliding. The manual intervention mainly involves inspection and maintenance. The working face with more than 40 people originally needs only 8 people to meet the production needs. In 2019, Huaibei Mining Group will promote intelligent mining in three thin coal seams and five medium thick coal seams. By improving the coverage rate of intelligent comprehensive mining, the intensive and efficient production mode of "one well, one side" will be realized.

Xinhu coal mine of Huaibei Mining Group is one of the key construction projects of "861" plan in Anhui Province, and its project construction is listed as one of the "five major events" of Huaibei Mining Group in 2020, striving to complete the preparation work of the first mining face excavation this year.

When the automatic operation system of air compressor was raised, the relevant person in charge introduced: "previously, working in the compressor room required two to three people per shift. The noise in the machine room was loud, and long-time work had adverse effects on the hearing health of employees. Now, through the integrated automation system and intelligent monitoring system, we can not only monitor the flow rate, exhaust temperature, intake temperature and other data in real time, but also realize automatic control according to the air consumption, so as to achieve the goal of unattended

The permanent automation of underground drainage system has been realized. What is intelligence? Using ultrasonic sensor to monitor water level, the system can automatically start the number of pumps according to the water level, and initially realize the intelligent permanent drainage system of "self monitoring, self calculation, self judgment, self execution".

Accurate positioning of personnel is the symbol of smart mine construction. In Xinhu coal mine, a common safety helmet equipped with an information miner's lamp has many functions, such as positioning, communication, alarm, paging, environment perception, posture perception and so on. It can master the position, posture and working state of underground operators at any time.

The reporter learned that the auxiliary shaft lifting, power monitoring, drainage centralized control, automatic operation of pressure fan and other subsystems of the mine have realized remote centralized control and unattended operation, and big data, artificial intelligence, mobile Internet and other technologies will also be applied in coal mine safety production, which will add wings to the construction and operation of this smart mine.

Extending coal chain

Sprint to 100 billion base

In Anhui (Huaibei) new coal chemical synthetic material base, Linhuan Zhongli Power Generation Co., Ltd. uses coal gangue, slime and mixed coal to generate electricity and heat, forming a win-win situation of environmental protection, economic benefits and employment.

It is also in this base, Anhui Ruibai new materials Co., Ltd. project site, workers are busy in various construction. The ethyl acetate produced by the company is a green environment-friendly solvent. In addition, the company has developed the production process of electronic products, mainly used for lithium battery electrolyte, solvent for pharmaceutical industry, etc., filling the domestic blank. "Methanol, ethanol and other raw materials used in the project are based on coal and local materials." Introduction to the person in charge of the company.

The reporter learned from Anhui (Huaibei) new coal chemical synthetic material base management committee that Huaibei City has accelerated the green transformation of traditional industries, promoted the transformation of coal from industrial fuel to basic chemical raw materials and high-end industrial materials, formed a "coal coke chemical electricity materials" circular economic mode, and continuously extended the industrial chain, increased added value, and sold several times or more Times the "good price" of raw coal.

In addition, Huaibei city promotes the traditional thermal power generation to be more energy-saving and environmental protection. With a total investment of 5.4 billion yuan, Pingshan Power Plant Phase II 1 × 1.35 million KW new high-efficiency generating units only consume 251 grams of coal per kilowatt, representing the world's most advanced level, and won the "annual global clean coal Leader Award" at the 30th International Electricity conference.

According to reports, Huaibei City has continuously promoted the industry to the highest end of the industrial chain and innovation chain, focusing on the construction of "four bases, one high, one large" strategic emerging industry of carbon based, silicon-based, aluminum based, biological based, high-end equipment manufacturing and big data industry. Among them, Anhui (Huaibei) new coal chemical synthetic material base has achieved an annual sales revenue of more than 20 billion yuan. It is a national circular economy industrial park, attracting a large number of high-quality chemical enterprises in Huaihai Economic Zone to settle down. In the next five years, it will become a "carbon based industrial base with an output value of 100 billion yuan".

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