Gush drenchs the importance of density aborning

The element that purifies degree of small effect is more, but no matter other technology index is carried out again good, Gush drenchs densityInsufficient, purify degree forever requirement of short of index. Present wet desulphurization, no matter be fertilizer plant or cooking factory, no matter be bulk filling or light porcelain filling, polypropylene, neat,filling is waited a moment, it is for solution better absorb vulcanization hydrogen. Gas is only better deliquescent in solution, ability happening counteracts reaction, ability assures to export vulcanization hydrogen be in index, ability assures to purify degree. If gush drenchs density on the low side, gas rises through filling in the process cannot solution of bring into contact with, the simple substance sulfur that reaction generates, salt kind, with etc a few not allow content cannot dissolve very well in solution, make these corporeal adhere are on filling, time is long, adhere content is increasing formed dry division. Can appear in those days aeriform drift, exit vulcanization hydrogen exceeds mark phenomenon. Here cites a case:

On April 11, 2016, after some ceramics works drives, Sichuan Chengdu exports vulcanization hydrogen unqualified all the time, changchun east personnel of lion company technology arrives after spot perambulate discovery, basically be gush drenchs density passes low, the contact that enrage fluid is undesirable, cause exit vulcanization hydrogen to exceed bid.

This ceramics works is as follows about data:

1. Tolerance 25000 Nm3/h

2. Entrance H2S<3g/Nm3

3. Exit <50mg/Nm3

4. Desulphurization tower diameter is filling of bulk of three-layer of the outfit inside 30m high for 3.4m

5. Second birth part is chamfer of low tower second birth, the diameter is 4000*4600*5400, second birth implement go up the ejector that installs 10 nozzle to be 20mm.

6. Desulphurization pump, second birth pump all is 3, every are 200m3/h, design two one equipment

7. Use pure lye to absorb, solution group share is in index

When this factory just drove, exit vulcanization hydrogen is OK still, hydrogen of vulcanization of the exit after 3 days exceeds bid, achieve 100mg/Nm3 above. The spot opens pump of to decoke of a 200m3/h only at that time, pump of second birth of a 200m3/h, the conclusion that reachs through spot perambulate and computation is, drench to such desulphurization tower gush density has 22m3/m2.h only, apparent such gush drenchs density was not to satisfy manufacturing need. So why does it open pump of to decoke of a 200m3/h only, the design should open two, if open two in season,drench density can achieve 44m3/m2.h. Expose again here give an issue, second birth hold back is pressed, on the ejector that main body is 20mm in 10 nozzle now (every ejector makes an appointment with 20m3/h) nozzle through solution quantity too small, cannot carry the internal circulating load of two pump, that is to say, the gush of short of 44 m3/m2.h drenchs density, to stabilize production, can open pump of a to decoke only, pump of a second birth is produced circularly, if drive production of pump of two to decoke, deficient fluid chamfer and rich fluid chamfer are lopsided, that opens a pump to produce only, so, to the desulphurization tower of diametical 3.4m, gush drenchs density is so low, gas fluid drift cannot be contacted adequately, export vulcanization hydrogen to exceed bid of course.

So how does the vulcanization hydrogen of this factory amount to mark? Adopted step is, change ejector of second birth chamfer, make nozzle enlarges 28mm above, make sure every ejector is in through solution quantity 40m3/h above, such ability make sure gush drenchs density. The fact proves, changed after ejector, increased internal circulating load, made sure gush drenchs density, exit vulcanization hydrogen will ask to the index of 50mg/Nm3 immediately.

The element that causes tower obstruction to rise is more, have light porcelain filling broken, solution impurity is much, moire filling lodging, deputy salt is tall, suspension sulfur is tall, tar is waited a moment more, these elements make tower obstruction rises possibly, but gush drenchs density is low also be the main reason that causes tower obstruction to rise.

Now is anxious heat vital energy without giving thought to, kiln furnace is angry, still be the half water gas processing that produces furnace to need H2S, the adoption with processing general H2S is wet desulphurization and dry method to decoke, desulphurization tower sets three-layer filling commonly, or bulk filling or neat filling, it is to enrage fluid to be contacted adequately. Pass desulphurization tower when gas by fall and go up when passing ground floor filling, with contact upstream by the desulphurization fluid that go up and falls, pass reaction of catalysis of activator of 888 to decoke, transform H2S into simple substance sulfur, from on downward ordinal pass the 2nd, three-layer filling, continue the H2S that was not changed into simple substance sulfur to absorb change, take tower of sulfur of manage to sell as solution finally. So the solution that absorbed H2S to contain simple substance sulfur should pass three-layer filling namely, ordinal pour out of desulphurization tower to go second birth system. If gush drenchs density is low, gas is in ascendant process sulfur grain, dirt, tar not dissolve content is touched go up in filling, because gush drenchs density is low, these adhere content cannot get assemble to move reach erode, cannot be in harmony arrives in solution, cannot take tower of sulfur of manage to sell as solution more, time is long, these places formed dry division, as the elapse of time, dry area area is larger and larger, aeriform ascendant passageway is smaller and smaller, cause tower obstruction to rise.

Illustrate: Company of phone of Shandong some Lv drenchs with respect to occurrence gush density is low, the problem that tower obstruction rises.

Here brief introduction concerned production data:

1. Tolerance 35000Nm3/h

2. Entrance H2S<5g/Nm3

3. Exit H2S<50mg/Nm3

4. Desulphurization tower is 4.5m continuously

5. Desulphurization pump is 500m3/h

This company to decoke drives what activator purchases is Changchun activator of a PDS, drive nearly two months, export vulcanization hydrogen to exceed bid not only, and desulphurization tower obstruction rises, serious when rise to 8KPa above, affected gas output badly, be forced stop production, gather up tower clear filling.

This the accident got Lv Dian take seriously what the company leads highly, through market survey, final decision asks Changchun east lion firm expert, on-the-spot guidance analyses accident reason, concluding is:

1. Desulphurization pump rated discharge slants small, gush drenchs density has 31.5m3/m2.h only, gush drenchs density is low the main reason that is a tower

2. Activator quality is poor, oxidation ability is weak, capacity carrying oxygen is insufficient, grain of formation simple substance sulfur is petty, go against floatation of second birth bubble (drive two months do not give bubble all the time)

3. Force of after service technology is weak