CN102078764A - Flue gas lime-gypsum desulfuration method for industrial furnace without chimney - Google Patents

Flue gas lime-gypsum desulfuration method for industrial furnace without chimney Download PDF

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Publication number
CN102078764A
CN102078764A CN 201010593346 CN201010593346A CN102078764A CN 102078764 A CN102078764 A CN 102078764A CN 201010593346 CN201010593346 CN 201010593346 CN 201010593346 A CN201010593346 A CN 201010593346A CN 102078764 A CN102078764 A CN 102078764A
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CN
China
Prior art keywords
flue gas
absorption tower
chimney
gypsum
tower
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Application number
CN 201010593346
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Chinese (zh)
Inventor
姜述玉
姚殿宝
温建
孙艳燕
李春生
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秦皇岛双轮环保科技有限公司
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Priority to CN 201010593346 priority Critical patent/CN102078764A/en
Publication of CN102078764A publication Critical patent/CN102078764A/en

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Abstract

The invention discloses a flue gas lime-gypsum desulfuration method for an industrial furnace without a chimney. The method comprises the following steps: after the flue gas of the industrial furnace is purified by a deduster, an induced draft fan leads the purified flue gas into an absorption tower, wherein the absorption tower is made of a high-temperature resistant stainless steel composite material; the flue gas is subjected to reverse convection contact with the atomized mortar desulfuration liquid sprayed by a nozzle in the tower to form a good atomization absorption area, thus finishing the desulfuration and absorption of the flue gas; and the desulfurated flue gas is demisted by a demister at the top of the tower and demisted gas is directly discharged from a chimney at the top of the tower. According to the invention, the absorption tower is made of the high-temperature resistant stainless steel composite material, and the flue gas is discharged by the chimney at the top of the absorption tower integrated with the chimney and the tower when a desulfuration system fails or the desulfuration system is not used due to other reasons. Meanwhile, a system self-cleaning system works to aperiodically flush components entering the absorption tower. The flushing water enters an independently arranged self-cleaning water tank and is recycled after impurities are precipitated.

Description

Do not establish the industrial furnace flue gas lime-gypsum method sulfur method of chimney

Technical field

The present invention relates to a kind of industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney.

Background technology

At present, what domestic industry stove flue gas desulfurization technique was most widely used is the lime-gypsum wet flue gas desulfurization technique, on desulfurization transformation project and grassroot project, does not establish GGH, clean flue gas after the desulfurization is saturated wet flue gas, and the cigarette temperature is low, high humidity, little from pull out force.

In addition, also there is the etching problem of desulfurization wet flue gas in wet desulphurization, and the corrosion type of desulfurization wet flue gas comprises sulfuric acid, sulfurous acid, hydrochloric acid, hydrofluoric acid etc., and the flue gas grade is a severe corrosive.Chimney is under the double action of flue gas pressures that contains Korrosionsmedium and humidity, and the condensate that dewfall forms has very strong corrosivity, and the material production corrosion to chimney inside structure density difference influences structure durability.

Design standard according to International Industry chimney association (CICIND): coal-burning power plant's desulfuration chimney should design by deep-etching flue gas grade.

Traditional chimney is generally monotubular formula taper reinforced concrete chimney, for being suitable for the service condition of desulfurization wet flue gas, must carry out preservative treatment to its inwall.Corrosion-inhibiting coating must satisfy desulphurization system operation or because of hot flue gas medium environment under maintenance and the accident conditions desulphurization system two states out of service.

In the design of stove exhaust system, all contain chimney.Fume emission after the desulfurization is as utilizing original chimney, and as mentioned above, the chimney that clean flue gas passes through need be done preservative treatment.

Summary of the invention

The technical issues that need to address of the present invention just are to overcome the defective of prior art, a kind of industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney is provided, it adopts resistant to elevated temperatures stainless steel composite material to make the absorption tower, when desulphurization system fault or other reasons do not use desulphurization system, utilize top, the absorption tower smoke stack emission flue gas of " unification of cigarette tower ".Simultaneously, system's self-cleaning system works is irregularly washed the parts that enter the absorption tower.Flushing water enters the self-cleaning tank of independent setting, and is recycling after the precipitated impurities.

For addressing the above problem, the present invention adopts following technical scheme:

The invention provides a kind of industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney, described method comprises the following steps:

The industrial furnace flue gas is introduced the absorption tower by air-introduced machine after deduster purifies, described absorption tower is the absorption tower that resistant to elevated temperatures stainless steel composite material is made; Flue gas contacts with the reverse convection current of atomizing lime white doctor solution of nozzle ejection at Ta Nei, forms good atomizing uptake zone, and the desulfurization of finishing flue gas absorbs; Flue gas after desulfurization is by the demister of cat head, after the demist directly from the cat head smoke stack emission.

Inherent absorption tower, absorption tower is for the first time below the spraying layer and the secondary pulse device is installed between the gas approach, form between flue gas and the doctor solution and impact, it is poor to form dynamic pressure, flue gas flow rate is slack-off, the time of contact of desulfurization slurry and flue gas is elongated, it is abundant that mass transport process is carried out, and the time of contact of prolong smoke and slurries, improves desulfuration efficiency.

Absorb SO 2Doctor solution be delivered to oxidation pond through piping and be oxidized to gypsum, flow into the sedimentation basin precipitation by pipeline again, the gypsum slurries of post precipitation is grabbed out by the driving grab bucket, dries the back outward transport, clear liquid is returned desulfurizing tower by the slag stock pump, and is recycling.

Described absorption tower is provided with the self-cleaning system, irregularly the parts that enter the absorption tower is washed, and flushing water enters the self-cleaning tank of independent setting, and is recycling after the precipitated impurities.

The present invention has used the technology of " unification of cigarette tower ", in the industrial furnace desulfurization project, chimney is directly designed at the top, absorption tower, solve the chimney that clean flue gas passes through and to have done antiseptic problem, original chimney uses as bypass, when desulphurization system maintenance or fault, to open the by-pass damper door, close absorption tower import baffle door, flue gas is through original smoke stack emission.

This patent adopts resistant to elevated temperatures stainless steel composite material to make the absorption tower, when desulphurization system fault or other reasons do not use desulphurization system, utilizes top, the absorption tower smoke stack emission flue gas of " unification of cigarette tower ".Simultaneously, system's self-cleaning system works is irregularly washed the parts that enter the absorption tower.Flushing water enters the self-cleaning tank of independent setting, and is recycling after the precipitated impurities.

During operate as normal, system carries out desulfurization according to lime-gypsum method to flue gas.

The inventive method main feature has:

1, the absorption tower can be born 250 ℃, need not anti-corrosion measure, can reduce the investment of chimney.

2, calcium sulfite oxidation is outside tower, not desulphurization system fouling together, obstruction.

3, self-cleaning system can guarantee can not stop up when the absorption tower internals are used under hot conditions.

4, the self-cleaning tank recycles rinse water, energy savings and water resource.

The inventive method is applicable to that the boiler tonnage is the glass melter of 300~900t/d in heating boiler, Industrial Boiler, 100~2,000,000 ton cement rotary kiln, the melting capacity of 1~220t/h.

The specific embodiment

It is the absorption tower that resistant to elevated temperatures stainless steel composite material is made that the present invention adopts the absorption tower, in the industrial furnace desulfurization project, chimney is directly designed at the top, absorption tower, when desulphurization system fault or other reasons do not use desulphurization system, utilize top, the absorption tower smoke stack emission flue gas of " unification of cigarette tower ".

The industrial furnace flue gas is introduced the absorption tower by air-introduced machine after deduster purifies.Flue gas contacts with the reverse convection current of atomizing doctor solution of nozzle ejection at Ta Nei, forms good atomizing uptake zone, and the desulfurization of finishing flue gas absorbs.Flue gas after desulfurization is by the demister of cat head, after the demist directly from the cat head smoke stack emission.

Adopt the secondary pulse device in the absorption tower, the time of contact of prolong smoke and slurries, improve desulfuration efficiency.The secondary pulse device is placed in below the spraying layer first time of absorption tower and between the gas approach.After flue gas enters the absorption tower, form between flue gas and the doctor solution and impact, it is poor to form dynamic pressure, and flue gas flow rate is slack-off, and the time of contact of desulfurization slurry and flue gas is elongated, and it is abundant that mass transport process is carried out.

With closed tank truck lime is transported in the factory, carries (air compressor machine) to be transported in the lime storage tank standby by strength.Pulverized limestone is transported to the water circulating pump import by the lime white liquid pump after digesting through digester, enters the absorption tower and carries out desulfurization.

Water circulating pump is extracted doctor solution out in the tower still, and the combined lime slurries are got to and carried out desulphurization reaction in the tower simultaneously.After absorbing sulfur dioxide, flow back to absorption Tata still, be provided with tower still mixer in the tower still.

Simultaneously, absorb SO 2Doctor solution be delivered to oxidation pond through piping and be oxidized to gypsum, flow into the sedimentation basin precipitation by pipeline again, the gypsum slurries of post precipitation is grabbed out by the driving grab bucket, dries the back outward transport.Clear liquid is returned desulfurizing tower by the slag stock pump, and is recycling.

This patent adopts resistant to elevated temperatures stainless steel composite material to make the absorption tower, when desulphurization system fault or other reasons do not use desulphurization system, utilizes top, the absorption tower smoke stack emission flue gas of " unification of cigarette tower ".Simultaneously, system's self-cleaning system works is irregularly washed the parts that enter the absorption tower.Flushing water enters the self-cleaning tank of independent setting, and is recycling after the precipitated impurities.

It should be noted that at last: obviously, the foregoing description only is for example of the present invention clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being amplified out thus or change still are among protection scope of the present invention.

Claims (4)

1. industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney, it is characterized in that: described method comprises the following steps:
The industrial furnace flue gas is introduced the absorption tower by air-introduced machine after deduster purifies, described absorption tower is the absorption tower that resistant to elevated temperatures stainless steel composite material is made; Flue gas contacts with the reverse convection current of atomizing lime white doctor solution of nozzle ejection at Ta Nei, forms good atomizing uptake zone, and the desulfurization of finishing flue gas absorbs; Flue gas after desulfurization is by the demister of cat head, after the demist directly from the cat head smoke stack emission.
2. the industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney as claimed in claim 1, it is characterized in that: inherent absorption tower, absorption tower is for the first time below the spraying layer and the secondary pulse device is installed between the gas approach, form between flue gas and the doctor solution and impact, it is poor to form dynamic pressure, flue gas flow rate is slack-off, and the time of contact of desulfurization slurry and flue gas is elongated, and it is abundant that mass transport process is carried out, the time of contact of prolong smoke and slurries, improve desulfuration efficiency;
3. the industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney as claimed in claim 2 is characterized in that: absorb SO 2Doctor solution be delivered to oxidation pond through piping and be oxidized to gypsum, flow into the sedimentation basin precipitation by pipeline again, the gypsum slurries of post precipitation is grabbed out by the driving grab bucket, dries the back outward transport, clear liquid is returned desulfurizing tower by the slag stock pump, and is recycling.
4. as the arbitrary described industrial furnace flue gas lime-gypsum method sulfur method of not establishing chimney of claim 1-3, it is characterized in that: described absorption tower is provided with the self-cleaning system, irregularly the parts that enter the absorption tower are washed, flushing water enters the self-cleaning tank of independent setting, and is recycling after the precipitated impurities.
CN 201010593346 2010-12-17 2010-12-17 Flue gas lime-gypsum desulfuration method for industrial furnace without chimney CN102078764A (en)

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CN 201010593346 CN102078764A (en) 2010-12-17 2010-12-17 Flue gas lime-gypsum desulfuration method for industrial furnace without chimney

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104587826A (en) * 2015-02-09 2015-05-06 安徽海螺建材设计研究院 Novel dry-process cement kiln tail flue gas desulfurization system and desulfurization process thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101185840A (en) * 2007-08-24 2008-05-28 北京紫光威肯环保工程技术有限公司 Turbine type pressure charging acceleration fuel gas desulfurization gas wash tower

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101185840A (en) * 2007-08-24 2008-05-28 北京紫光威肯环保工程技术有限公司 Turbine type pressure charging acceleration fuel gas desulfurization gas wash tower

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104587826A (en) * 2015-02-09 2015-05-06 安徽海螺建材设计研究院 Novel dry-process cement kiln tail flue gas desulfurization system and desulfurization process thereof

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Application publication date: 20110601