By-product recovery plants

By-product recovery and processing

Main design facilities:

  • By-product recovery plant.
  • The plants of hydrogen sulfide recovery from coke oven gas to produce sulfuric acid or sulfur.
  • Crude benzene processing plants.
  • Tar processing plants.
  • Various binders preparation units.
  • Tank batteries for liquid products.
  • Storages for bulk products storing, packaging and loading.
  • Coke oven gas fine purification units for long-distance gas transportation.
  • Central plant laboratories.
  • Liquid waste products utilization unit.
  • Systems of by-product plants' equipment sealing.
  • Fuel production units, including motor fuel, from coal and other raw materials.
  • Technical projects of individually manufactured equipment.

By-product recovery plants

200 thousand nm3/ h.

The capacity of by-product recovery plants in terms of coke oven gas

100 thousand nm3/ h.

The capacity of single gas stream

By-product recovery plants make provision for:


Cooling of coke oven gas in tubular gas coolers using circulating service and chilled water; an option for using heat of coke oven gas for heating the absorption solutions of desulphurization.


Removal of tar mist from coke oven gas in electrostatic precipitators.


Settling of flushing liquor from coal-tar pitch and sludges in mechanized decanters.


Tar desludging in centrifuges (tricanters).


Treatment of excess flushing liquor with decomposition of fixed ammonia salts using energy-saving technologies.


Removal of ammonia from coke oven gas up to 0.03 g/nm3 by saturator and saturator-free methods with production of ammonium sulfate, recovery of ammonia using water followed by desorption and ammonia decomposition


Final cooling of coke oven gas in closed systems using efficient heat exchanging equipment, without the release of harmful substances into the atmosphere.


Recovery of benzene hydrocarbons and naphthalene in absorbers with metal structured packing.


Heating of coal-tar oil in tube furnaces of benzene distillation section.


Heating and cooling of absorption oil in spiral heat exchangers.


Safety devices against pressure increase in the gas pipeline of the enterprise over the preset value (gas bleeders).


Manifold systems for sealing of process equipment.

Plant of hydrogen sulphide removal from coke oven gas

  • The capacity of  plants for hydrogen sulphide removal from coke oven gas makes up to 200 thousand nm3/ h. The capacity of single gas stream is 100 thousand nm3/ hour and more.
  • Coke oven gas cleaning by monoethanolamine method up to 0.05 g/nm3 and by vacuum-carbonate method up to 0.5 g/nm3 is used, as well as complex cleaning of coke oven gas from ammonia and hydrogen sulphide with decomposition of ammonia and production of commercial-grade elementary sulfur and sulfuric acid using highly effective catalysts.
  • Absorbers with metal structured packing are used to recover hydrogen sulphide. 
  • Spiral and plate heat exchangers are used when heating and cooling-down solutions and hydrogen sulphide gas.

By-product recovery plants

Processing plants

Processing of coal tar makes provision for:

  • Removal of sludge and water from coal tar in tricanters.
  • Continuous processing of coal tar in a single-column unit with heating of tar in a tubular furnace.
  • Recovery of coal tar fractions.
  • Generation of coal tar pitch and technical oils.
  • Pitch granulation.

Processing of coal tar

50-400 thousand

The capacity of the plants of anhydrous tar per year.

50-200 thousand

The capacity of one tar rectification unit of anhydrous tar per year.