CN206607202U - The structure of coal chemical industry sulfur recovery tail gas sulfur plug is prevented by process optimization - Google Patents

Abstract

The structure of coal chemical industry sulfur recovery tail gas sulfur plug is prevented by process optimization the utility model discloses a kind of, it includes entrance separator, combustion reaction stove, primary waste heat boiler, primary heater, first reactor, secondary waste heat boiler, secondary heater, second reactor, the 3rd waste heat boiler, Reconstruction of End Gas Separator and the sour gas heater connected by pipeline.By cancelling exhaust scrubber, and using the sour gas heater of process front end as heater exhaust gas process optimization measure, under the premise of equipment and steam consumption is not increased, coal chemical industry sulfur recovery tail gas temperature is increased to more than vulcanization sublimation temperature, the sulphur of solution, which is sublimated, blocks the technical problem of exhaust pipe and equipment, and intrinsic tail gas steam-jacket pipe, steam companions and exhaust scrubber can be cancelled, so that steam saving and cost of equipment maintenance.

Description

The structure of coal chemical industry sulfur recovery tail gas sulfur plug is prevented by process optimization

Technical field

The utility model be related to it is a kind of the structure of coal chemical industry sulfur recovery tail gas sulfur plug is prevented by process optimization, belong to In coal synthesis ammonia, methanol technics in sulfur recovery system tail gas treatment process equipment improvement areas.

Background technology

Washed in the low-temp methanol of coal synthesis ammonia, methanol in acid gas treatment processes, sour gas mainly contains vulcanization Hydrogen and water vapour and its acid solution.Partial vulcanization hydrogen steams with a certain amount of oxygen reaction burning generation sulfur dioxide and water Vapour, the sulfur dioxide of generation reacts under high temperature and catalyst action respectively with remaining hydrogen sulfide gas again, and generation sulphur steams Gas, then by waste heat boiler reclaim product gas waste heat after, most of sulphur it is vapor reforming into liquid-state sulfur is separated into molten sulfur production Product, the remaining gas of sulphur steam, water vapour, hydrogen sulfide and sulfur dioxide etc. on a small quantity formation sulfur recovery tail gas.Existing process is usual Sour gas is preheated, and subsequent treatment first is entered back into using washing or after burning to sulfur recovery tail gas, and uses tail gas Steam companions or chuck form of tubes improve the temperature of tail gas to prevent sulphur steam frozen plug pipeline and equipment.But it is traditional The drawbacks of technique has larger, although exhaust scrubber can wash hydrogen sulfide and sulfur dioxide remaining in removing tail gas first Sour gas, but can also reduce exhaust temperature causes sulphur steam to sublimate to form solid sulphur blocking pipeline and equipment so that System can not stable operation.Secondly the sulfur recovery system sour gas heater that traditional handicraft is set belongs to stand-by equipment, and difficult To resist the severe corrosive of hydrogen sulfide solution.Therefore, there is larger defect in traditional sulfur recovery technology vent gas treatment, cause tail gas Pipeline and follow-up equipment are blocked, and there is idleness of equipment waste.

The content of the invention

The technical problems to be solved in the utility model is to provide a kind of heating structure that change amplitude is small, cost is low, can be by Exhaust scrubber is cancelled in former technique, and former process of acidic gas heater is used as heater exhaust gas, takes full advantage of The stand-by equipment of former technique, and exhaust temperature is improved to more than sulphur sublimation temperature, effectively prevent exhaust pipe and subsequently set Standby blockage problem, can overcome deficiency of the prior art.

The technical solution of the utility model：The structure of coal chemical industry sulfur recovery tail gas sulfur plug is prevented by process optimization, It include technique post-process sour gas sour gas pipe, sour gas pipe by connecting tube be sequentially connected entrance separator, It is combustion reaction stove, primary waste heat boiler, primary heater, first reactor, secondary waste heat boiler, secondary heater, second anti- Answer device, the 3rd waste heat boiler, Reconstruction of End Gas Separator and sour gas heater.

Foregoing prevents that the structure of coal chemical industry sulfur recovery tail gas sulfur plug from being by process optimization, sour gas heater Heating-up temperature be higher than sulphur sublimation temperature.

Compared with the prior art, the utility model and is cancelled using sour gas heater as sulfur recovery tail gas heater Exhaust scrubber.Sour gas be directly entered without sour gas heater combustion reaction stove, primary waste heat boiler, first plus After hot device, first reactor, secondary waste heat boiler, secondary heater, second reactor and the processing of the 3rd waste heat boiler, generation contains There are water vapour and a small amount of sulphur steam, hydrogen sulfide, the sulfur recovery tail gas of sulfur dioxide, the washer of former flow is removed, and will Sour gas heater is improved more than exhaust temperature to sulphur sublimation temperature, it is therefore prevented that sulphur in tail gas as heater exhaust gas Sublimate and block pipeline and equipment.The utility model is by cancelling exhaust scrubber, and by the sour gas heater of process front end As the process optimization measure of heater exhaust gas, under the premise of equipment and steam consumption is not increased, by coal chemical industry sulfur recovery tail gas Temperature is increased to more than vulcanization sublimation temperature, and the sulphur of solution, which is sublimated, blocks the technical problem of exhaust pipe and equipment.Also, this Utility model can cancel intrinsic tail gas steam-jacket pipe, steam companions and exhaust scrubber, thus steam saving and Cost of equipment maintenance.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of existing process.

Embodiment

Embodiment：As shown in figure 1, technique post processing sour gas sour gas pipe 1 by connecting tube be sequentially connected into Mouthful separator 2, combustion reaction stove 3, primary waste heat boiler 4, primary heater 5, first reactor 6, secondary waste heat boiler 7, the Two heaters 8, second reactor 9, the 3rd waste heat boiler 10, Reconstruction of End Gas Separator 11 and sour gas heater 12, sour gas The heating-up temperature of heater 12 is higher than sulphur sublimation temperature.

Claims (2)

1.1 it is a kind of the structure of coal chemical industry sulfur recovery tail gas sulfur plug is prevented by process optimization, it include technique post treatment acid The sour gas pipe of property gas（1）, it is characterised in that：Sour gas pipe（1）Entrance separator is sequentially connected by connecting tube （2）, combustion reaction stove（3）, primary waste heat boiler（4）, primary heater（5）, first reactor（6）, secondary waste heat boiler （7）, secondary heater（8）, second reactor（9）, the 3rd waste heat boiler（10）, Reconstruction of End Gas Separator（11）With sour gas heating Device（12）.

2. according to claim 1 prevent the structure of coal chemical industry sulfur recovery tail gas sulfur plug by process optimization, it is special Levy and be：Sour gas heater（12）Heating-up temperature be higher than sulphur sublimation temperature.