Research on the development of circular economy in

2022-07-23
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Research on the development of circular economy in the paper industry release date: Source: Internet editor: lychee browsing times: 565 copyright and disclaimer core tip: for the traditional paper industry, large pollution discharge and high energy consumption are its main characteristics. This industry has been classified as a high pollution industry, and the concentration of pollutants discharged in the manufacturing process is very high. The paper industry has always been one of the important industries for energy conservation and emission reduction projects and promoting the development of circular economy in China. In accordance with the relevant provisions of the national industrial policy, the work deployment of the special rectification of the paper industry nationwide has gradually opened the prelude to the special rectification of environmental pollution in China's pulp and paper industry. All provinces and cities shall adjust the discharge of pollutants in strict accordance with the national wastewater pollutant discharge standards for the paper industry, and require the relevant pulp and paper industries to conduct in-depth treatment of the discharged wastewater up to the standard

[China Packaging News] for the traditional paper industry, large pollution discharge and high energy consumption are its main characteristics. This industry has been classified as a high pollution industry, and the concentration of pollutants discharged during the manufacturing process is very high. The paper industry has always been one of the important industries for energy conservation and emission reduction projects and promoting the development of circular economy in China. In accordance with the relevant provisions of the national industrial policy, the work deployment of the special rectification of the paper industry nationwide has gradually opened the prelude to the special rectification of environmental pollution in China's pulp and paper industry. All provinces and cities shall, in strict accordance with the national wastewater pollutant discharge standards for the paper industry, adjust the most comprehensive resulting discharge of pollutants, and require the relevant pulp and paper industries to carry out in-depth treatment of the discharged wastewater up to the standard

I. Analysis of industrial development mode and characteristics of the paper industry

(I) industrial development mode with bagasse as the main raw material

pulp production with bagasse as the main raw material is generally an industry extended from the sugar industry, which is generally distributed in various provinces and cities. The advantages of this industrial development model are mainly reflected in the following aspects due to the limitations of various factors and its development characteristics: first, bagasse, as its own raw material, is a by-product of sugar production from sugarcane. In the past, when sugar was produced, the bagasse by-product was burned as fuel. In areas with sugar production advantages, the sources of raw materials are relatively rich, and the production price is relatively low. The combination of sugar making and paper making can produce good economic benefits. According to the statistics of relevant departments, it is estimated that the calorific value of bagasse with half water content per ton is about 4.4 × 10, and the calorific value per ton of raw coal is 8.8 × 10, that is, 2T bagasse can be ejected from 1t raw coal. Before 2007, the general profit point of enterprises manufacturing a ton of bagasse was about 1000 yuan. In recent years, despite the sharp decline in profits due to fierce market competition, on the whole, it is still very considerable. Secondly, bagasse raw materials can be used to produce chemical pulp by the most conventional alkali method or sulfate method, which is easy to boil and bleach, with good pulp performance, and the amount of cooking and bleaching chemicals is much less than that of wood. Thirdly, the silicon content of bagasse is much higher than that of wood, but much lower than that of straw pulp

(II) the industrial development model with bamboo as the main raw material

the main industrial advantages and relevant characteristics of the industrial development model with bamboo as the main raw material are shown in the following aspects: first, this model is generally concentrated in areas where bamboo sources are abundant. Generally, the growth period of bamboo is not long. Bamboo planted at one time can be used for several consecutive years, and it is basically possible to thinned within three years, The annual output per mu is generally one to two tons. If selective breeding is carried out, the annual output can even reach three to four tons. It usually costs about four tons of fresh bamboo to make a meal of paper, which is an obvious advantage of bamboo compared with other materials. Thirdly, coniferous wood is the most suitable papermaking material. Its fiber content is high, slender and relatively strong. In terms of fiber content of bamboo, it is also similar to coniferous wood. The raw materials extracted from bamboo are basically similar to those extracted from coniferous wood. This is an important paper-making material besides wood paper-making, which is more suitable for manufacturing some high-end products. Thirdly, bamboo pulp can be mixed with wood pulp and sugarcane pulp to produce stationery and packaging paper with good quality and low price. With the continuous development of science and technology in China, the papermaking process is also making continuous progress, the continuous cooking technology is gradually maturing, and the pollution-free bleaching technology is also developing, which can effectively solve the technical problem of low fiber degree in papermaking

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(III) industrial development model with wood as the main raw material

as far as the current market situation is concerned, the manufacturing sources of some high-grade paper in the world are mainly wood pulp paper. 95% of the output of paperboard used in the world is made of wood fiber. Due to the backward technology of China's traditional paper industry and the unreasonable ratio of paper raw materials, the contradiction between China's paper demand and supply is increasing, which is an important reason for the impact of the international paper industry on China's paper industry in recent years. Therefore, wood pulp papermaking is the main support object of China's papermaking industry in the future. The development advantages of this model and its main characteristics are as follows: first, with the increasing awareness of afforestation, the people have generally accepted the idea of planting trees to get rich, which can increase the coverage area of wood and provide raw materials for wood pulp and paper making. Secondly, with the shortage of papermaking resources, the pressure of environmental protection is also increasing step by step. Structural adjustment and industrial upgrading have realized the large-scale production of continuous, industrialized and industrialized production enterprises, with remarkable economic and environmental benefits, which has laid a foundation for building a circular economy of "green Chinese paper industry" with Chinese characteristics. In addition, there is an industrial development model with waste paper recycling as the main raw material

II. Analysis of the main problems existing in the development of circular economy in the paper industry

(I) analysis of the current situation of circular economy

the main characteristics of the paper industry determine that the industry should develop circular economy. The main reason is that the raw materials of the paper industry, whether wood fiber or non wood fiber, are renewable resources, which can be reused after the recycling of waste paper. After treatment, they can replace some avantgarde raw materials of the original sound and be reused in paper making. Pulping and papermaking consumes a lot of electricity and steam, which is more suitable for some cogeneration, self supply of raw materials, and comprehensive utilization of fuel through chemical reaction. In the process of pulping, more advanced processes can be adopted to achieve the circulation of production water, which can continuously reduce the amount of clean water

(II) analysis on the current situation and existing problems of the development of China's paper industry

1. The rapid expansion of China's paper industry has resulted in overcapacity

it has become a fact that the paper enterprises are expanding too fast in the use of bagasse raw materials. According to the survey, taking a city in the south of China as an example, from the production capacity of less than 140000 tons in 2006 to 360000 tons per year in 2010, this situation has resulted in a relative shortage of bagasse raw materials, the price is also rising step by step, and some enterprises are in a state of insufficient supply of raw materials. Such a situation has affected the production and operation efficiency of enterprises to a certain extent, and is not conducive to the development of circular economy in the paper industry

2. It is difficult to supervise decentralized small enterprises

an important problem in the development of China's paper industry is that there are many small paper enterprises, forming a small paper group industry. This has created other regulatory difficulties. Under the strong pressure of the state, although some enterprises have reduced their production, forcing them to rectify and close down, they have basically met the requirements of national industrial development. However, such small enterprises are still small and scattered in the development process. The quality of paper workers also needs to be improved, the environmental protection concept of some business owners needs to be enhanced, the use of environmental protection facilities is not in place, and frequent failures occur. In some counties and districts, the number of regulatory agencies is limited, but there are very many enterprises that need to be regulated, which leads to the phenomenon of inadequate supervision. It is difficult to supervise the small and scattered paper-making enterprises with few personnel. Although the environmental protection department has increased the punishment for illegal sewage discharge, some enterprises still have the luck of "escaping if they can and being punished if they can't escape". 3. The negative effects of the paper industry on the ecological environment the national industrial policy for the paper industry is to choose wood as the basic raw material, which brings a series of environmental protection problems. Forest resources are limited. The paper industry relies on the purchase of surrounding wood to ensure the supply of raw materials. These raw materials are some forest lands cut down. If these forest lands cannot be restored within the corresponding time, the surrounding forest coverage may be reduced, resulting in water and soil loss. These ecological problems should be paid attention to by relevant departments

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III. The development of circular economy in China's paper industry

(I) implementing the integrated circular development of forest and pulp

the paper industry experience of developed countries in the world is to take the road of integrated circular development of forest and pulp, which is also the road of projects encouraged by China's industrial policies. The so-called integrated circular development of forest pulp is to integrate the previous three links of forest, pulp and paper under the promotion of the market mechanism. The paper-making enterprises not only undertake the task of paper-making, but also undertake the task of afforestation. Let these enterprises solve the forestry problems themselves and form a new industrial pattern. This pattern mainly uses paper to raise forests and forest to promote paper, so as to ensure that the paper-making industry takes the road of sustainable development. From the perspective of the development of circular economy, the paper industry and the afforestation industry are closely related, and they need to be interdependent and promote each other. For a long time, the paper industry and the afforestation industry have been managed by different departments. There is no good standard preparation among the industries, which fully considers the organic combination of technological development and production needs. The development of the paper industry is restricted by the afforestation industry, and the forestry can not achieve sustainable development. The supply of wood is limited, which is difficult to meet the needs of national economic development. The paper-making enterprises should be the main enterprises in the development of circular economy, the capital and interests should be the ties of development, and the original separated links should be integrated. Let the paper industry bear the task of afforestation, so as to solve the problem of raw materials by itself. We will continue to develop the ecological paper industry, organically combine the pulp making industry with forestry, and form a three in one circular development model. Relevant state departments shall provide policy support and encourage relevant personnel to build forestry bases. Implement the new forestry development road, ensure ecological construction, give full play to the various functions of forestry, improve the supply capacity of forestry varieties, and maximize the impact of economic development on forestry production

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