CN101570320B

CN101570320B - Sulfur spray gun anti-stream leakage method in device for producing acid by sulfur

Info

Publication number: CN101570320B
Application number: CN2009101026120A
Authority: CN
Inventors: 黄进; 邱祖军; 岑祖望; 李宇琴
Original assignee: Wengfu Group Co Ltd
Current assignee: Wengfu Group Co Ltd
Priority date: 2009-06-10
Filing date: 2009-06-10
Publication date: 2011-01-05
Anticipated expiration: 2029-06-10
Also published as: CN101570320A

Abstract

The invention discloses a sulfur spray gun anti-stream leakage method in device for producing acid by sulfur. Equipment is modified so that refractory steel is adopted as sulfur spray gun material, a heat insulation steam mouth piece is lengthened, a sulfur spray gun heat insulation sleeve heat insulation steam inlet and outlet valve is interlocked with a sulfur spray gun atomized liquid sulfur spray valve; simultaneously, when the sulfur gun works, the sulfur spray gun heat insulation sleeve heat insulation steam ensures not to enter, the possibility of steam leakage is zero, thus avoiding the serious consequences such as serious pulverization of converted catalyst, generation of condensed acid by an economizer and overproof discharge of acid mist in tail gas After the equipment is modified, due to good working performance of the equipment, the problem of steam leakage basically does not happen during working time between overhauls, thus avoiding the long term stoppage loss of the devices which cause the above serious consequences due to leakage, seriously maintaining the devices in overhaul stoppage, and basically precluding the devices from breaking down. The invention has good economic and social benefits.

Description

Sulphur rifle leakproof vapour method in the acid production with sulphur

Technical field

The invention belongs to the sulphur system of utilization gas washing in SA production technical field, relate in particular to sulphur spray gun vapor-proof leakage method in the sulphur-burning sulphuric acid plant.

Background technology

The character of elemental sulfur, physical properties sulphur is light yellow crystal, is commonly called as sulphur.Be insoluble in water, be slightly soluble in alcohol, be soluble in CS ₂, 114 ℃ of fusing points, 444.6 ℃ of boiling points.One of chemical property, the easy and oxygen generation chemical reaction generation sulfurous gas of sulphur is emitted a large amount of heat simultaneously.In the acid production with sulphur production technique, at first, with the sulphur heat fused at low temperatures (more than 114 ℃) become liquid state, then, burn with molten sulfur and to produce SO ₂SO ₂Producing is to carry out in sulfur furnace, liquid sulfur be adopt the sulphur rifle carry out atomised jet to sulfur furnace interior after, just burn, therefore, the atomised jet effect has considerable influence to the molten sulfur burning yield.

Sulphur-burning sulphuric acid plant sulfur furnace sulphur rifle is provided with steam jacket, and when preventing that sulphur from quitting work, liquid sulfur is when being lower than 115 ℃, and liquid sulfur is solidified and resulted in blockage, and can not work.Could work so keep the temperature of sulphur rifle integral body to be higher than 115 ℃ of sulphur rifles, this is the primary condition of the sulphur rifle energy works better of sulphur-burning sulphuric acid plant.

In the sulphur-burning sulphuric acid plant, sulphur rifle structure formation is basic identical at present, equal carrying vapour chuck, and general working method is:

1) before driving feeds intake that the sulphur rifle is in place, open insulation steam then, sulphur rifle temperature reaches 130～140 ℃, generally warm rifle 20 minutes.

2) beginning to be dosed to normally after the insulation of sulphur rifle, is exactly the atomised jet liquid-state sulfur, carries out works better immediately.

3) normal work period, the insulation steam of sulphur rifle is held open always.

There is following shortcoming in above traditional method:

1) stove Nei Wenduda more than 600 ℃ in the sulphur rifle operational process, if at this moment sulphur rifle steam jacket produces gas leakage, the steam that spills and be difficult for discovering, normal work period, because insulation steam is held open state always, leak-off steam also enters in the sulfur furnace thereupon.

2) when the sulphur rifle leaks vapour,, cause sulfur furnace outlet SO behind the leakage vapour because of it is a water vapor ₂Furnace gas moisture content severe overweight can cause the serious efflorescence of conversion catalyst when entering following operation, can produce the condensation acid in a large number in the economizer in follow-up equipment, exhaust emissions acid mist index can produce and exceed standard, and has a strong impact on ordinary production and carries out.

3) when the conversion catalyst efflorescence, cause that systemic resistance falls when big, system is forced to stop and handles, and steam and steam are after economizer can produce the condensation acid in a large number, and general economizer is a steel construction, is corroded easily, and the result easily causes the equipment booster, produces serious consequence.In case the generation booster, whole production system is out of service, just will produce huge financial loss.

Summary of the invention

Content purpose of the present invention is to avoid the sulphur rifle to leak vapour and produces serious consequence, in the normal productive process, the air that enters sulfur furnace blows to cephalad direction from the back side of sulphur rifle, air themperature only is about 80 ℃, the sulphur rifle not will consider the sulphur rifle by the high-temperature damage problem when ordinary production, and in the normal productive process, the molten sulfur that is higher than the liquefaction temperature of sulphur passes through the sulphur rifle continuously, heated the sulphur rifle, at this moment sulphur rifle can not make the sulphur that passes through in the sulphur rifle solidify without steam insulation yet, so the insulation steam of sulphur rifle can be closed when ordinary production, the essential unlatching when stopping during parking, the one reason is that hot gas can flow backwards because there is not the cooling effect of air when stopping, and the time has been grown and can cause sulphur rifle high temperature to burn out.The contriver has solved the problem that steam leaks gas and sulphur rifle high temperature burns out through research, test.

Sulphur spray gun vapor-proof leakage method in the sulphur-burning sulphuric acid plant of the present invention, according to following step: the first step, scrap build, (1) sulphur spray gun of the present invention adopts high temperature steel to make, and (2) are with the insulation steam mouth-piece lengthening of sulphur spray gun insulation jacket; (3) sulphur spray gun insulation jacket insulation steam terminal valve adopts electric control valve, interlocks with sulphur spray gun spraying liquid sulphur injection valve; Set simultaneously: during sulphur spray gun atomised jet valve closes, insulation steam terminal valve standard-sized sheet; Insulation steam terminal valve can be adjusted to and can carry out manual operation; Second step, technological operation

(1) before liquid sulfur sprays into that the sulphur spray gun is in place, manually opened then insulation steam warms up rifle, is incubated 20 minutes down for 130～140 ℃ in holding temperature, opens sulphur spray gun atomised jet valve sulfuring up liquid state and is sprayed onto normally; (2) manual-lock insulation steam valve; When (3) stopping when stopping or meeting accident, sulphur spray gun atomised jet valve closes, interlocking gear is opened the insulation steam valve immediately automatically.

Sulphur spray gun vapor-proof leakage method in the above-mentioned sulphur-burning sulphuric acid plant, wherein making the sulphur gun material adopts high temperature steel to make, require to adopt material 600 ℃～650 times energy works better, with the access of sulphur spray gun insulation jacket insulation steam, steam access, relief outlet pipe lengthening, the length of lengthening is more than the 150cm.Its extension length inserts and discharges the sealing member of interface when the insulation steam does not feed with insulation steam, the tempering of parking furnace gas enters and causes the sulphur spray gun to heat up, and the sealing material that can prevent to be incubated high temperature under the steam interface is not damaged and is as the criterion.

Effect of the present invention or advantage, through our one section concrete enforcement, present method is effectively stopped possible steam leakage problem, sulphur spray gun insulation jacket insulation steam does not enter when the sulphur rifle is worked, there is not steam gas leakage possibility, the serious efflorescence of conversion catalyst of having avoided the sulphur rifle to leak the vapour overlong time and having caused, economizer produces condensation acid in a large number, serious consequences such as the exhaust emissions acid mist exceeds standard, after scrap build, because the equipment work performance is good, on period at time between overhaul can not produce steam gas leakage problem basically, avoided causing device long term stop loss after the above-mentioned serious consequence because of gas leakage, when overhaul is stopped, this part equipment is conscientiously safeguarded, stopped this part equipment generation accident substantially.The present invention has good economic and social benefit

Embodiment

Embodiment: with 200,000 tons of/year sulphur-burning sulphuric acid plants of Wengfu Group Co., Ltd. is example, this sulphur-burning sulphuric acid plant is with acid production with sulphur technology is identical both at home and abroad, use in the sulphur rifle production process and carry out following operation, the serious consequence that has caused after effectively having avoided sulphur rifle steam to bleed in the stove, at first transform the sulphur rifle, according to following step: the first step, scrap build, (1) sulphur spray gun of the present invention adopts high temperature steel to make, and (2) connect the sulphur spray gun insulation steam mouth-piece lengthening of insulation jacket; (3) sulphur spray gun insulation jacket insulation steam terminal valve adopts electric control valve, interlocks with sulphur spray gun spraying liquid sulphur injection valve; Set simultaneously: during sulphur spray gun atomised jet valve closes, insulation steam terminal valve standard-sized sheet; Insulation steam terminal valve can be adjusted to and can carry out manual operation;

Second step, technological operation, then, operate according to following schedule of operation:

1) before driving feeds intake that the sulphur rifle is in place, opened 130～140 ℃ of warm rifles of insulation steam then 20 minutes.

2) warm rifle qualified after, feed intake, open liquid-state sulfur and spray into and burn combustion of sulfur to normal.

3) feed intake enter normal running after, close sulphur rifle insulation steam.

When 4) stopping or during orderly shutdown when meeting accident, the sulphur rifle is set interlock, and equipment is opened sulphur rifle insulation steam or opening of not setting automatically, opens sulphur rifle insulation steam immediately with manual operation, guarantee that sulphur rifle temperature about 130～140 ℃, keeps working order.

Claims

1. sulphur spray gun vapor-proof leakage method in the sulphur-burning sulphuric acid plant is characterized in that according to following step: the first step, and scrap build, (1) sulphur gun material adopts high temperature steel to make, and (2) are with sulphur spray gun insulation jacket insulation steam mouth-piece lengthening; (3) sulphur spray gun insulation jacket insulation steam terminal valve adopts electric control valve, interlocks with sulphur spray gun spraying liquid sulphur injection valve; Set simultaneously: when sulphur spray gun spraying liquid sulphur injection valve is closed, insulation steam terminal valve standard-sized sheet; Insulation steam terminal valve is adjusted to and can carries out manual operation;

In second step, before technological operation (1) liquid sulfur sprays into that the sulphur spray gun is in place, manually opened then insulation steam warms up rifle, is incubated 20 minutes down for 130 ℃ in holding temperature, opens sulphur spray gun spraying liquid sulphur injection valve spray liquid sulfur and is sprayed onto normally; (2) manual-lock insulation steam valve after the works better; When (3) stopping when stopping or meeting accident, sulphur spray gun spraying liquid sulphur injection valve is closed, and interlocking gear is opened the insulation steam valve immediately automatically.

2. sulphur spray gun vapor-proof leakage method in the sulphur-burning sulphuric acid plant according to claim 1, it is characterized in that making the sulphur spray gun adopts high temperature steel to make, require heat-resisting steel material energy works better under 600 ℃ of employing, with the two root interface pipes lengthening that sulphur spray gun insulation jacket insulation steam inserts and steam is discharged, the length of lengthening is more than the 150cm.