JIEMA HEAT EXCHANGER IN STEEL INDUSTRY

Steel industry is a basic yet important industry of national economy and symbol of a country's economic development, as well as comprehensive national strength. The development of steel directly affects related defense industry and construction, machinery, shipbuilding, automobiles, home appliances and many more industries. With the transfer of various industries globally, as well as China`s rapid development of, we are seeing both great achievements and opportunities.

Here`re some more statistics. China, a major steel producer and consumer, has ranked first in its crude steel production in the world for many years. For 2019 alone, the output of crude steel, pig iron, and steel products was 996.34 million tons, 809.37 million tons, and 1.2 billion tons respectively, representing year-on-year increases of 8.3%, 5.3%, and 9.8% accordingly. From January to December 2019, steel companies that are members of the China Iron and Steel Industry Association achieved sales revenue of 4.27 trillion CNY.

However, it is also an industry with high energy consumption, high emission, and high pollution.

In the long run, energy conservation and environmental protection will be the main flow for steel companies. Saving resources, reducing consumption as well as pollutant emissions, is still a big challenge to be tackled for environmental quality and human health.

What Solutions Can We Offer to These Processes?

In the production process of the steel industry, whether it is the material line or the energy line, the main system or the auxiliary system, there are a large number of heat exchangers and pressure vessels used.

Chemical workshop

1. Crude benzene section

a. Oil-lean section cooler;

b. Lean oil second-stage cooler;

c. Crude (light) benzene condensing cooler;

2. Ammonia evaporation section

a. Ammonia water preheater;

b. Ammonia vapor condensing cooler;

3. Ammonium sulfate section

Ammonium sulfate drying hot air heater

4. Desulfurization section

Desulfurization lean liquid cooling/heater

5. Drum cooling section

a. Blower turbine oil cooler

b. Utilization of waste heat of circulating ammonia water, heat exchanger for ammonia water and clean water for heating and bathing;

6. Air compression section

Compressed air cooler

7. Boiler room

Soft water preheater

Coke oven workshop

Basement gas preheater

Crude benzene processing

1. Initial distillation tower: a. Initial residue cooler; b. Initial fraction condensation cooler

2. Two benzene towers: a. unwashed fraction condensing cooler; b. Raw material heater;

3. Blowing out benzene tower: blowing out benzene condensing cooler

4. Pure benzene tower: a. pure residue cooler; b. pure benzene condensing cooler;

5. Toluene tower: a. Toluene residue cooler; b. Toluene condensation cooler;

6. Refining tower (xylene): xylene condensing cooler;

7. Boiler soft water preheater;

8. Steam condensate recovery; waste heat utilization; waste steam condenser for heating and bathing.

Sintering system

1. Auxiliary engine oil cooler

2. Gas and Air Preheater

3. Flue gas waste heat utilization heat exchanger

Ironmaking system

1. Fan oil cooler

2. Auxiliary engine oil cooler

3. Water cooling system heat exchanger

4. Gas and air preheater

5. Flue gas waste heat utilization heat exchanger

6. Waste heat recovery heat exchanger for slag washing water

7. Slag flushing ditch whitening heat exchanger

Steelmaking system

1. Auxiliary engine oil cooler

2. Heat exchanger for electric furnace/converter water cooling system

3. Heat exchanger for continuous casting water cooling system

4. Flue gas cooler

Steel rolling system

1. Auxiliary engine oil cooler

2. Heat exchanger for pickling water cooling system

3. Water cooling system heat exchanger

4. Hot-rolled plate gas-to-gas heat exchanger