Which has a better prospect for flue gas desulfurization or sewage treatment 30

I think sewage treatment is better, both majors are environmental protection related majors, and the prospects are very good! But after all, water resources are our very precious resources, and now the state has strict supervision on the use of sewage in various chemical plants, and all chemical plants will have to go to sewage treatment projects in the future. As for flue gas desulfurization, I think that general chemical plants can save money, so relatively speaking, I personally think that the prospect of sewage treatment is better!

But no matter how good the profession is, it also depends on the company's development prospects! Both sides should be considered in a balanced manner!

According to my opinion, flue gas desulfurization is better, but you also have to consider the company's own development potential, no matter how good the field is, it will not become a climate for a bad company.

It depends on what you do Training and guidance, equipment commissioning, installation, and contact business. These two kinds of equipment are used in our unit, and we have also come into contact with these people, mainly because the division of labor is different, and the responsibilities and powers are different, so the salary is not the same. I feel that sewage treatment is better, because sewage is a big project, not just a few sets of equipment can be installed.

However, to do sewage treatment, you must have a shot or even a patented pretreatment technology, so that the company can have a future.

One is an equipment company, the other is an engineering company, the engineering company may be a little tired, learn more knowledge than the equipment company, the income is about the same, sales exceptions.

The problem of water pollution in China is still relatively prominent

China's water resources are seriously polluted, and in 2021, the proportion of surface water - class quality, - water type and poor class was the same as the proportion; The proportions of excellent (-) water quality, -class water and poor water in the national rivers are and respectively. The proportion of water quality, water quality and poor water quality in lakes and reservoirs throughout the year is and respectively.

The PPP model of the sewage treatment industry is emerging

In the 60s and 70s of the 20th century, China began to invest in the construction of a number of sewage treatment facilities and sewage treatment plants. Under the planned economic system, all sewage treatment plants are state-owned institutions, with poor operating capacity, and most of the sewage treatment plants are primary treatment, and there is an extreme shortage of professional personnel in the operation of sewage treatment plants.

Since 2002, China's urban sewage treatment has developed rapidly in both quantity and quality. The Ministry of Construction has successively promulgated a series of relevant documents, providing clear policy expectations and legal guarantees for domestic and foreign investors, and stipulating codes of conduct for various entities in the urban sewage treatment market.

Since 2015, the PPP model of the sewage treatment industry has gradually emerged, which is based on "benefit sharing, risk sharing, and long-term cooperation" to promote the infrastructure construction of sewage treatment facilities of the company.

Sewage treatment capacity continues to increase

As an important part of the environmental protection industry, the sewage treatment industry has developed well in recent years with the support of the best policy, and the sewage treatment capacity has continued to increase. According to data from the Ministry of Housing and Urban-Rural Development, the daily sewage treatment capacity of China's cities will reach 100 million cubic meters in 2021, a year-on-year increase.

In recent years, the amount of urban sewage treatment in China has shown an upward trend. In 2021, the national urban sewage treatment capacity will be 100 million cubic meters, of which the urban sewage treatment capacity will be 100 million cubic meters, and the county sewage treatment capacity will be 100 million cubic meters.

The policy focuses on improving wastewater treatment capacity

As an important aspect of environmental protection, water environment governance has been highly valued, and a series of documents such as the "Three-year Action Plan for Improving the Quality and Efficiency of Urban Sewage Treatment (2019-2021)", the "Implementation Plan for Strengthening the Weaknesses of Urban Domestic Sewage Treatment Facilities", and the "14th Five-Year Plan" Urban Sewage Treatment and Resource Utilization Development Plan have been issued one after another, and the state has actively carried out water pollution control actions. <>

Flue gas desulfurization refers to the process of removing sulfur dioxide (SO2) from flue gas by treating it. At present, there are two commonly used flue gas desulfurization methods: wet flue gas desulfurization and dry flue gas desulfurization.

Wet flue gas desulfurization refers to the reaction of sulfur dioxide with calcium hydroxide or ammonia water in the absorbent containing alkaline solution in the smoke beam gas through the absorbent containing alkaline solution to generate water-soluble sulfides such as calcium sulfate or ammonium sulfate, and then wash and remove dust. Common wet flue gas desulfurization processes include limestone-gypsum method, ammonia method and alkaline peroxide method.

Dry flue gas desulfurization is to spray dry alkaline powder into the flue gas to react with sulfur dioxide to generate sulfides such as calcium sulfate and subsequently remove dust. The dry flue gas desulfurization process includes fixed layer dry desulfurization, cyclone dry desulfurization, semi-dry desulfurization, etc.

The choice of flue gas desulfurization method needs to consider many factors, including sulfur content, flue gas temperature, solid particulate matter content in flue gas, treatment efficiency, operating costs, environmental protection requirements, etc. Generally speaking, the wet flue gas desulfurization process is better for flue gas treatment with high sulfur content, but the operating cost is relatively high, while the dry flue gas desulfurization process is suitable for flue gas treatment with low sulfur content, with lower operating cost but relatively low treatment efficiency.

Therefore, in practical application, it is necessary to select and design according to the specific situation of slag-resistant sen, and comprehensively consider many factors such as economy, technical feasibility and environmental protection requirements.

Desulfurization technology. At present, there are dozens of types of flue gas desulfurization technologies, and flue gas desulfurization is divided into three categories: wet, semi-dry and dry according to whether water is added to the desulfurization process and the dry and wet form of the desulfurization products.

Wet flue gas desulfurization technology is the most mature and has been applied on a large scale in industry, but due to the high investment cost, the process and equipment need to be optimized. The dry flue gas desulfurization technology does not have the problems of corrosion and condensation, but the desulfurization rate is much lower than that of the wet desulfurization technology, and the general power plant will not choose it, so the dry desulfurization process based on the new desulfurization principle must be further developed. Semi-dry desulfurization technology has a high desulfurization rate, but it is not suitable for large-capacity combustion equipment. The most suitable desulfurization method will be selected under different working conditions to obtain the greatest economic benefits, 1. Wet flue gas desulfurization technology.

Advantages: The wet flue gas desulfurization technology is a gas-liquid reaction, with fast reaction speed and high desulfurization efficiency, generally higher than 90%, mature technology and wide application. The wet desulfurization technology is relatively mature, the production and operation are safe and reliable, and it has always occupied a dominant position among many desulfurization technologies, accounting for more than 80% of the capacity of the desulfurization machine.

Disadvantages: the product is liquid or sludge, which is difficult to handle, the equipment is seriously corrosive, the flue gas needs to be reheated after washing, the energy consumption is high, the area is large, and the investment and operation costs are high. The system is complex, the equipment is huge, the water consumption is large, and the one-time investment is high, which is generally suitable for large-scale power plants.

Classification: Commonly used wet flue gas desulfurization technologies include limestone-gypsum method, indirect limestone-gypsum method, lemon absorption method, etc.

a limestone lime-gypsum method:

Principle: It is to use limestone or lime slurry to absorb SO2 in flue gas to generate calcium sulfite, and the separated calcium sulfite (CaSO3) can be discarded, or oxidized to calcium sulfate (CaSO4) in the form of gypsum**. It is currently the most mature and stable desulfurization process in the world, with a desulfurization efficiency of more than 90%.

At present, the traditional limestone lime-gypsum flue gas desulfurization process is widely used in the Chinese market, which uses the calcium sulfite and calcium sulfate generated after absorbing sulfur dioxide by the calcium-based desulfurizer with a foot width, which is easy to form scaling and blockage in the desulfurization tower and pipeline due to its small solubility. Compared with the limestone desulfurization technology, the double-alkali flue gas desulfurization technology overcomes the shortcomings of the limestone-lime method.

b Indirect limestone-gypsum method:

Common indirect limestone-gypsum methods include: sodium-alkali double alkali method, alkaline aluminum sulfate method and dilute sulfuric acid absorption method. Principle:

Sodium alkali, alkaline alumina (al2o3˙ NH2O) or dilute sulfuric acid (H2SO4) absorbs SO2, and the resulting absorbent reacts with limestone to regenerate gypsum. The method is simple to operate, less secondary pollution, no scaling and clogging problems, and has high desulfurization efficiency, but the quality of the gypsum produced is poor.

c Lemon absorption:

Principle: Citric acid (H3C6H5O7˙ When the SO2 gas passes through the citrate liquid, the SO2 in the flue gas reacts with H in the water to form the H2SO3 complex, and the SO2 absorption rate is more than 99%.

I do flue gas desulfurization.

There are so many major thermal power plants, but there are more and more desulfurization companies, and the market is getting smaller and smaller. But the market is still there, especially the relatively small scale of the boiler, but the profit is not as lucrative as before!

PS: The classic point of view --- now that the market is shrinking, desulfurization is not carried out, and other environmental protection projects are carried out. As long as you don't leave the industry, it is.

The calcium method is almost done, and there are still out of stock, out of stock, and carbon dioxide. When you get all these things done, you will go back to the calcium method again, and the overhaul and transformation will start again, as long as the factory is there, it will never be finished, and the power and chemical industries will always be a polluting base. Hehe, I can't finish it in several generations, don't worry.

Unless you want to change careers.

Sewage treatment: the prospect is indeed better than flue gas desulfurization, because China is a large country with a large population, and the utilization of water resources is very huge, so the country is very tight on this piece, and the industry prospect is very good.

PS: A bright spot. Especially in the north, water resources are scarce, and recycling is emphasized, for example, Beijing has stipulated that reclaimed water must be used for car washes, but less than 1% of car washes use reclaimed water.

In addition, the state is paying more and more attention to environmental protection and increasing investment, as evidenced by the imposition of water treatment fees.

In fact, I feel that it is not much worse, you key is to see what type of work, process or civil engineering. Civil engineering may be hard, but there are a lot of things to learn, if you like to mess around, you will run to the project manager; There may be a few trips to the process, but it is more about design drawings, calculations, etc., which is suitable for more introverted people to move towards the process design manager. The most important point is that you can't go wrong with learning to use your brain and learn more when you work!!

What is Environmental Engineering? Factory? Enterprise?

I am an environmental protection specialist in a thermal power plant, the flue gas desulfurization process is limestone-lime wet desulfurization, the wastewater system is a major difficulty, process requirements, emission standards, dosing costs, etc., at the same time, the desulfurization system and the wastewater system are inseparable!!

This can not look at the immediate interests, to be honest I am not optimistic about desulfurization, now there are very few projects with coal furnaces, small ones are electric furnaces, where desulfurization is needed, with the progress of the process, then what prospects are there. But water treatment is different, there are a few projects without production or domestic wastewater, now environmental protection requires water treatment standards to be discharged or into the pipe network, and what can replace the use of water, as long as the water has to be treated.

These are just personal opinions, anyway, they are all environmental protection industries, one gas and one water, you can take a look at it in combination with the nature and number of industrial enterprises in the region.

If you can engage in the process design and equipment layout of sewage treatment, it will have a broader development prospect than flue gas desulfurization, but if you only do the operation of sewage treatment equipment, it is better to engage in flue gas desulfurization.

There will be nothing to be done in the next 5 years of desulfurization (except for the top desulfurization companies in China), and sewage treatment will always be done.

In recent years, China's BAI has paid more attention to the sustainability of environmental development.

Taiwan has a number of soil dao soil, air inside.

water resources and other governance policies. The continuous increase in environmental governance is a major benefit to the sewage treatment industry, and sludge treatment and sewage plants will usher in upgrading, and investment opportunities for industrial wastewater treatment and other projects will increase.

The "2018-2023 Market Prospect and Investment Strategic Planning Analysis Report of China's Sewage Treatment Industry" of the Prospective Industry Research Institute pointed out that from the perspective of construction scale, the national sewage treatment policy reflects two major trends: one is that "the focus is still in the southeast, and the center of gravity is shifted to the middle", and the other is that "the focus is still in the city, and the center of gravity is shifted to the county and town". These two trends will bring about a change in the market structure, and put forward higher requirements for the cost control ability, market development ability, and product innovation ability of related enterprises.

Driven by policies, the number of sewage treatment enterprises has increased significantly. According to the statistics of the "2018-2023 China Sewage Treatment Industry Market Prospect and Investment Strategic Planning Analysis Report" of the Prospective Industry Research Institute, in 2015, the number of enterprises in China's sewage treatment industry was 329, a year-on-year increase, of which 79 were loss-making enterprises, a year-on-year increase; The number of employees in the industry reached 28,514, a year-on-year increase.

On the whole, China's sewage treatment field is generally in its infancy, and sludge treatment enterprises with strong technical level, management ability and practical experience will face greater development opportunities in the future.