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Half direct way reclaims ammonia and to decoke take off cyanogen craft
From;    Author:Stand originally
1 preface

Factory of cooking of all view our country is gas purify flow, use half direct way generally to reclaim ammonia. Use HPF craft to decoke generally to take off cyanogen again in this kind of flow, production carries out a proof, reclaim directly partly ammoniac craft takes off cyanogen craft to create very advantageous atmosphere for HPF to decoke, thereby desulphurization takes off cyanogen efficiency extremely tall, after tower of best manufacturer to decoke gas in contain vulcanization hydrogen to be under M3 of 10-20m G / , near target of to decoke of essence of life. Become half direct way to reclaim the outstanding technology advantage that ammoniac to decoke takes off cyanogen.

Direct way reclaims to decoke of ammoniac AS law takes off cyanogen craft, because wash the blemish of the technology of ammoniac craft, ammonia content volatilizes in desulphurization fluid low, desulphurization efficiency is accordingly inferior. After tower of general to decoke gas in contain vulcanization hydrogen to be as high as M3 of 300 ~ 500m G / , cannot satisfy the requirement of industrial production and environmental protection.

To make clear the to decoke of craft of two kinds of technologies takes off the reason of cyanogen efficiency difference, compare the problem of the technical advantage of two kinds of craft and existence further, be necessary to undertake to two kinds of craft the technology is analysed, make clear crucial technology place, so that improve, perfect technology of two kinds of technologies, utmost land increases what desulphurization takes off cyanogen efficiency and ammonia to reclaim rate, the issue of the technical difficult problem that be in and environmental protection is put in solving two kinds of craft to be produced currently at the same time.

Two kinds of 2 to decoke take off cyanogen technological process

2.1 half direct way reclaims technological process of ammoniac to decoke (UPF)

First cold implement → report attacks tar implement → air-blower groans beforehand gush of → of tower of to decoke of cold tower → drenchs saturated implement → eventually cold implement → washs benzene tower →

2.2 direct ways answer technological process of to decoke of 4 history ammonia (AS)

First cold implement → report attacks tar implement → of tower of to decoke of → air-blower → washs ammoniac tower → eventually cold implement → washs benzene tower →

The comparison of characteristic of two kinds of 3 engineering technology

3.1 half direct way reclaims ammoniac to decoke takes off cyanogen craft, it is will residual ammonia water is handled in ammonia water alembic, before the ammonia that evaporate gives enrages to decoke of a person of wide knowledge and sound scholarship gas in, rise gas in ammonia content, close and the ammonia content in raising desulphurization fluid (can amount to L) of / of 7 ― 8 G commonly, after desulphurization tower gas in contain ammonia to be M3 of / of 3 ― 4g, drench in gush saturated implement in reclaim further ammonia, desulphurization efficiency is in 98% above. Desulphurization fluid has low temperature in second birth tower, fluid photograph, catalysis, oxidation generates monomer sulfur, in reborn process, about 30% ― the ammonia of 40% is blown National People's Congress is angry, pollute an environment not only, and ammoniac source is unemployed, influence to decoke takes off cyanogen efficiency and ammonia to reclaim rate, this is HPF to decoke takes off one of characteristics of cyanogen flow technology.
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