Since 2015, direct emissions of chemical oxygen demand (hereinafter referred to as COD) from existing textile enterprises must be controlled at 80 mg/L. This is the second increase in the emission threshold of the textile dyeing and finishing industry since the COD direct discharge standard was raised to 100 mg/L in 2013. In recent years, the central government has successively sent many batches of environmental protection supervision teams to Hebei, Jiangsu, Zhejiang, Henan, Guangxi, Heilongjiang and other places to conduct inspections and rectifications on the elimination of backward production capacity. The scope of the strict investigation covers the whole country. The launch of the third batch of environmental inspection teams has directly forced local governments to take action on environmental protection, but this time the spearhead is aimed at water-jet looms.
Jiaxing Xiuzhou District
A batch of 10,000 water-jet looms scattered in natural villages and outside industrial clusters that have a great impact on the environment and have not paid taxes in accordance with the law will be rectified and removed.
Xialu Town, Keqiao
The rectification goals of water-jet looms: strictly shut down a batch, standardize a batch, guide a batch of transformation, and eliminate 40% by the end of the year; the wastewater reuse rate will not reach 70% within 3 months, and the unit COD emission will not reach 70%. Businesses that require it will be forced to close.
Suzhou Operation 263
Promote the “retreat from scattered and centralized” water-jet loom enterprises, implement reclaimed water reuse, and achieve “zero” sewage discharge.
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During the more than 20 years of rapid development of China’s textile industry, water-jet looms have been the main force in the industry’s production capacity and are also responsible for promoting the development of the industry. However, at present, on the one hand, various national standards and industry access regulations based on environmental protection, such as printing and dyeing industry access, water-jet loom water intake quotas and other restrictive laws and regulations are being implemented intensively. On the other hand, various localities The environmental protection pushback mechanism is gradually being implemented. This time, environmental protection focuses on water-jet looms, which is equivalent to a death sentence and puts the filament weaving industry facing a severe test.
Water-jet loom is inseparable from water
Water-jet loom is the fastest growing shuttleless loom in textile machinery in recent years. Its advantages are high output, good quality and low weaving cost, but it consumes a lot of high-quality tap water. Under normal operation, each water-jet loom produces an average of 2.5 tons of wastewater per day. The COD concentration of these industrial wastewaters ranges from 120 mg to 850 mg per liter, and each machine consumes an average of 5-8 tons of water per day. At present, the annual water consumption of water jet looms in my country is as high as 450 million tons.
Due to the use of slurry and grease in the weaving process, the COD, BOD, SS and other indicators in the discharged wastewater exceed the standards, causing water pollution. If the wastewater resources cannot be properly treated and recycled, it will cause Waste of water resources and environmental pollution. At the same time, the recycled water should not foam during the circulation process, otherwise it will affect the normal operation of the loom and thus affect the output.
With the improvement of environmental protection awareness and the shortage of water resources, the treatment of wastewater from water jet looms has attracted more and more attention, especially in countries with water shortages such as my country. The problem of water shortage has become increasingly prominent and has become a constraint on social and economic development. One of the main factors. In the context of a new round of economic transformation and upgrading, the environment no longer allows the water-jet loom industry to continue this extensive extension development.
Water-jet looms, which account for 80% of the industry’s production capacity, face difficult multiple-choice questions about sewage discharge
In the context of the round of upgrading of the textile industry in 2000, the introduction of water-jet looms was once a government-encouraged project. Now, ten years have passed. Under the background of a new round of economic transformation and upgrading, the environment no longer allows the water-jet loom industry to continue this extensive extension development. From the analysis of the industry’s production capacity stock structure, water-jet looms currently account for 80% or even higher of the industry’s overall production capacity, and in some regions and enterprises, low-end water-jet looms with high energy consumption and low grade are still used.
According to data from the China Filament Weaving Association, as of the end of 2016, there were more than 400,000 water-jet looms in the country, with an annual output of 44.8 billion meters of various filament fabrics.
Situation of water-jet loom equipment in key industrial clusters in 2016
On the one hand, the comprehensive costs of labor, raw materials, etc. have soared, resulting in profits declining year by year. On the other hand, environmental protection regulations are getting tighter. The textile industry, which has long been among the top three in wastewater emissions, is facing more difficult multiple-choice questions about sewage emissions.
Water jet loom that cannot be turned off
In fact, as early as 2004 and 2008, and even after 2010, many major textile industry towns, including Jiaxing and Changxing areas, while making every effort to carry out rectification of key polluting industries, also repeatedly inspected the water-sprayed textiles existing in every household. Although the “minor micro-polluting” industry of the machine industry has been rectified, the effect of the rectification has been unsatisfactory and many problems have resurfaced. What are the reasons?
1. For polluting industries�It is necessary to adopt shock therapy with “shut down, stop, merge, and transfer” as the main means, close down polluting enterprises by providing subsidies, and then integrate them into several large enterprises to improve equipment levels and industry competitiveness, and ultimately realize the realization of the whole industry Upgrade. This approach is not “symptomatic” for the water-jet looms that exist in thousands of households.
2. Due to the wide and scattered distribution of water-jet looms, production can be done at home, and the purchase threshold is low, making it difficult for relevant departments to supervise. Some water-jet loom owners just received the elimination subsidy and then purchased new water-jet looms. In addition, water-jet looms, as an intermediate link in the textile industry chain, have great market demand. Taking the end of last year as an example, since the end of last year, the filament weaving market has ushered in a good market that has been rare in recent years. Conventional gray fabrics such as polyester taffeta , pongee and other inventories have been wiped out, and by the middle of this year, sales are extremely hot. Gray fabrics such as polyester taffeta are produced on water-jet looms, and since the end of last year, the market has The improvement has led textile business owners to purchase a large number of textile machines, and the number of water-jet looms has actually been growing.
New problems encountered by the old textile master
Nowadays, the extensive development of the water-jet loom industry has caused harm to the ecology. Government departments, water-jet loom operators, residents and other levels have all seen it, and rectification has reached an urgent moment. However, the author recently met an old master in the industry who has been in the industry for many years. He expressed many doubts about the current status of the industry and hoped that everyone can help solve his doubts.
Question 1: Why is it that the treatment is not “correct” but still persists in its own way?
It can be seen from the practices of the above industrial clusters that after implementing the rectification of the sprinkler industry for nearly ten years, government units still mainly adopt a shock approach to polluting industries with “shut down, stop, merge, and transfer” as the main means. Treatment, the practice of shutting down polluting companies by providing subsidies. In their view, they said that this treatment was not “correct” as early as 10 years ago, so why do they still persist in pursuing it?
Question 2: Why is the cycle of the water-jet loom so short? Will it encounter this dilemma again after replacing it again?
Some people say that today, when the market is pursuing diversification of raw materials and rapid changes in varieties, rapier looms and air-jet looms, which represent today’s advanced weaving technology, are still slow to increase their share in the industry. What is the reason? Looking at the development history of water-jet looms, from the encouragement of the development of water-jet looms in various towns and villages in 2000 to the first wave of rectification in 2004, less than 4 years later, it was treated as an obsolete industry in 4 years, which made my heart go cold. , if after replacing the air-jet loom, will we encounter such a dilemma again? We private enterprises cannot joke with money!
Question 3: Where will these eliminated water-jet looms go?
The textile industry has been talking about transformation and upgrading. It is understood that many enterprises have upgraded their machines in recent years, but have they been truly eliminated? The machines replaced here are resold to small businesses or central regions. The transformation and upgrading of the industry is just a porter of the industry. In fact, we have been adding more, and our production capacity has been expanding rapidly. Judging from this year’s elimination standards for water-jet looms, there is no explanation of the ownership of the eliminated machines. So where will these eliminated water-jet looms go?
Question 4: How much does environmental transformation cost?
Money is always an unavoidable topic for enterprises to carry out environmental protection transformation. In the textile industry, where the average profit margin is less than 5%, and the water spray industry is dominated by small and medium-sized enterprises, it is really hard to make environmental improvements. And land is another threshold. For many companies, the average wastewater pretreatment facility occupies less than 10% of the company’s land. If the company wants to meet the standards for indirect emissions, it must increase the floor area by at least 30%. You talk about environmentally friendly transformation, but do you know how much it costs?
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