阅读说明：本技术 高硫废弃物焚烧处理系统及处理方法 (High-sulfur waste incineration treatment system and treatment method ) 是由 吴敏 朱飞 杨胤宗鹏 胡晓炜 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种高硫废弃物焚烧处理系统及处理方法,涉及危险废物处理技术领域。该高硫废弃物焚烧处理系统包括依次连接的焚烧装置、制酸装置及脱硫装置,焚烧装置用于焚烧高硫废弃物,并生成含硫化物的初级烟气,制酸装置用于通入初级烟气以进行制酸,并生成硫酸和次级烟气,脱硫装置用于对次级烟气进行脱硫处理,以生成可排的洁净烟气。该高硫废弃物焚烧处理系统及处理方法具有能够焚烧处理高硫废弃物,且处理过程不易腐蚀后续设备,并能够生成副产品硫酸的特点。(The invention discloses a high-sulfur waste incineration treatment system and a high-sulfur waste incineration treatment method, and relates to the technical field of hazardous waste treatment. This high-sulfur waste incineration disposal system is including the incineration device, acid making device and the desulphurization unit who connects gradually, and the incineration device is used for burning high-sulfur waste, and generates the elementary flue gas that contains sulphide, and acid making device is used for letting in elementary flue gas in order to make sour, and generates sulphuric acid and secondary flue gas, and desulphurization unit is used for carrying out desulfurization treatment to secondary flue gas to the clean flue gas that can arrange is generated. The high-sulfur waste incineration treatment system and the treatment method have the characteristics that the high-sulfur waste can be incinerated, follow-up equipment is not easy to corrode in the treatment process, and a byproduct sulfuric acid can be generated.)

1. A high-sulfur waste incineration treatment system is characterized by comprising an incineration device, an acid making device and a desulfurization device which are sequentially connected;

the incineration device is used for incinerating high-sulfur waste and generating primary flue gas containing sulfide;

the acid making device is used for introducing the primary flue gas to make acid and generate sulfuric acid and secondary flue gas;

and the desulfurization device is used for performing desulfurization treatment on the secondary flue gas to generate the dischargeable clean flue gas.

2. The high-sulfur waste incineration disposal system according to claim 1, wherein the acid making device includes a cooling mechanism and an acid making mechanism connected in sequence, the cooling mechanism is connected to the incineration device, and the acid making mechanism is connected to the desulfurization device;

the cooling mechanism is used for cooling the primary flue gas;

the acid making mechanism is used for introducing the primary flue gas to make acid so as to generate the sulfuric acid and the secondary flue gas.

3. The high-sulfur waste incineration disposal system of claim 2, wherein the temperature of the primary flue gas cooled by the cooling mechanism is 200 degrees celsius or less.

4. The high sulfur waste incineration disposal system of claim 2, wherein the secondary flue gas generated by the acid plant has a sulfur dioxide concentration<50mg/Nm³。

5. The high-sulfur waste incineration disposal system of claim 2, wherein the acid plant further comprises a dust removal mechanism connected between the incineration device and the cooling mechanism;

the dust removal mechanism is used for removing dust from the primary flue gas and ensuring that the dust content of the primary flue gas which is subjected to dust removal by the dust removal mechanism is less than or equal to 30mg/Nm³。

6. The high sulfur waste incineration disposal system of claim 5, wherein the dust removal mechanism is a high temperature ceramic cartridge dust remover.

7. The high-sulfur waste incineration disposal system according to claim 1, wherein the incineration apparatus comprises a rotary kiln and a secondary combustion chamber which are connected in sequence;

the rotary kiln is used for burning the high-sulfur waste, and flue gas with the temperature of 850-900 ℃ is generated at the tail of the kiln;

the secondary combustion chamber is used for secondary combustion of the flue gas to generate primary flue gas, and the temperature of the primary flue gas is 1050-1150 ℃.

8. The high-sulfur waste incineration disposal system of claim 7, wherein the incineration device further comprises a waste heat mechanism connected between the secondary combustion chamber and the acid production device;

the waste heat mechanism is used for cooling the primary flue gas and reducing the temperature of the primary flue gas to 500-600 ℃.

9. A high-sulfur waste incineration treatment method is characterized by comprising the following steps:

and (3) carrying out acid preparation on primary flue gas containing sulfides generated by burning high-sulfur waste, and carrying out desulfurization treatment on secondary flue gas obtained after acid preparation.

10. The high sulfur waste incineration disposal method of claim 9, wherein before the step of making acid with the primary flue gas, the disposal method further comprises:

sequentially dedusting and cooling the primary flue gas to ensure that the temperature of the primary flue gas is reduced to be less than or equal to 200 ℃, and the dust content of the primary flue gas is less than or equal to 30mg/Nm³。

Technical Field

The invention relates to the technical field of hazardous waste treatment, in particular to a high-sulfur waste incineration treatment system and a high-sulfur waste incineration treatment method.

Background

With the rapid development of economy and industry, the generation of various wastes is increasing, and particularly, the treatment of toxic and harmful hazardous wastes has become a social concern.

However, for hazardous wastes with high sulfur content, the incineration flue gas generated by the existing treatment means has high sulfur content, is easy to cause serious corrosion to subsequent equipment, and has high treatment cost.

In view of the above, it is important to develop a high-sulfur waste incineration system and a high-sulfur waste incineration method capable of solving the above technical problems.

Disclosure of Invention

The invention aims to provide a high-sulfur waste incineration treatment system which has the characteristics that the high-sulfur waste can be incinerated, the subsequent equipment is not easy to corrode in the treatment process, and a byproduct sulfuric acid can be generated.

The invention also aims to provide a high-sulfur waste incineration treatment method, which has the characteristics that the high-sulfur waste can be incinerated, the subsequent equipment is not easy to corrode in the treatment process, and a byproduct sulfuric acid can be generated.

The invention provides a technical scheme that:

in a first aspect, an embodiment of the present invention provides a high sulfur waste incineration system, including an incineration device, an acid making device, and a desulfurization device, which are connected in sequence; the incineration device is used for incinerating high-sulfur waste and generating primary flue gas containing sulfide; the acid making device is used for introducing the primary flue gas to make acid and generate sulfuric acid and secondary flue gas; and the desulfurization device is used for performing desulfurization treatment on the secondary flue gas to generate the dischargeable clean flue gas.

With reference to the first aspect, in a first implementation manner of the first aspect, the acid making device includes a cooling mechanism and an acid making mechanism, which are connected in sequence, the cooling mechanism is connected to the incineration device, and the acid making mechanism is connected to the desulfurization device; the cooling mechanism is used for cooling the primary flue gas; the acid making mechanism is used for introducing the primary flue gas to make acid so as to generate the sulfuric acid and the secondary flue gas.

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, the temperature of the primary flue gas cooled by the cooling mechanism is less than or equal to 200 ℃.

With reference to the first aspect and the foregoing implementations of the first aspect, in a third implementation of the first aspect, the secondary flue gas generated by the acid plant has a sulfur dioxide concentration of <50mg/Nm 3.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, the acid making device further includes a dust removal mechanism, and the dust removal mechanism is connected between the incineration device and the cooling mechanism; the dust removal mechanism is used for removing dust from the primary flue gas and ensuring that the dust content of the primary flue gas which is subjected to dust removal by the dust removal mechanism is less than or equal to 30mg/Nm³。

With reference to the first aspect and the foregoing implementation manner of the first aspect, in a fifth implementation manner of the first aspect, the dust removal mechanism is a high-temperature ceramic filter cartridge dust remover.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, the incineration device comprises a rotary kiln and a second combustion chamber, which are connected in sequence; the rotary kiln is used for burning the high-sulfur waste, and flue gas with the temperature of 850-900 ℃ is generated at the tail of the kiln; the secondary combustion chamber is used for secondary combustion of the flue gas to generate primary flue gas, and the temperature of the primary flue gas is 1050-1150 ℃.

With reference to the first aspect and the foregoing implementation manner, in a seventh implementation manner of the first aspect, the incineration device further includes a waste heat mechanism, and the waste heat mechanism is connected between the secondary combustion chamber and the acid making device; the waste heat mechanism is used for cooling the primary flue gas and reducing the temperature of the primary flue gas to 500-600 ℃.

In a second aspect, an embodiment of the present invention further provides a high sulfur waste incineration disposal method, which includes the following steps: and (3) carrying out acid preparation on primary flue gas containing sulfides generated by burning high-sulfur waste, and carrying out desulfurization treatment on secondary flue gas obtained after acid preparation.

With reference to the second aspect, in a first implementation manner of the second aspect, 1 before the step of making acid with the primary flue gas, the processing method further includes: sequentially dedusting and cooling the primary flue gas to ensure that the temperature of the primary flue gas is reduced to be less than or equal to 200 ℃, and the dust content of the primary flue gas is less than or equal to 30mg/Nm³。

Compared with the prior art, the high-sulfur waste incineration treatment system and the treatment method provided by the embodiment of the invention have the beneficial effects that compared with the prior art:

the incineration device, acid making device and desulphurization unit connect gradually, the incineration device is used for burning high sulfur discarded object, and generate the elementary flue gas that contains sulphide, the acid making device sets up behind the incineration device, and the acid making device is used for receiving foretell elementary flue gas, and use elementary flue gas as the raw materials to make acid, with production sulphuric acid and secondary flue gas, and reduce the concentration of the sulphur in the elementary flue gas, with the reduction contain the corruption of sulphur flue gas to follow-up equipment, and carry out further desulfurization treatment through desulphurization unit to secondary flue gas, in order to generate the clean flue gas that can discharge. Therefore, the concentration of sulfur in the incinerated flue gas is reduced by the acid making device arranged after incineration and before desulfurization, so that the corrosion of subsequent equipment is avoided, and a sulfuric acid byproduct is generated, so that the economic benefit of high-sulfur waste treatment is improved.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of a high-sulfur waste incineration system according to a first embodiment of the present invention.

FIG. 2 is a schematic flow chart of a high-sulfur waste incineration disposal method according to a second embodiment of the present invention.

Icon: 10-high-sulfur waste incineration disposal system; 12-an incineration unit; 121-rotary kiln; 122-second combustion chamber; 123-a waste heat mechanism; 1241-waste storage pit; 124-transfer grab bucket; 125-conveying machine; 126-a crusher; 127-water seal closed tank; 128-slag conveyor; 129-slag storage; 15-an acid making device; 151-a dust removal mechanism; 152-a cooling mechanism; 153-acid making mechanism; 155-ash scraper conveyor; 156-ash storage; 17-a desulfurization unit; 171-first-stage deacidification tower; 172-second order deacidification tower; 173-flue gas heater.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like, refer to an orientation or positional relationship as shown in the drawings, or as would be conventionally found in use of the inventive product, or as would be conventionally understood by one skilled in the art, and are used merely to facilitate the description and simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The first embodiment:

referring to fig. 1, fig. 1 is a schematic structural diagram of a high-sulfur waste incineration system 10 according to a first embodiment of the present invention.

The embodiment of the invention provides a high-sulfur waste incineration treatment system 10, which has the characteristics that the high-sulfur waste can be incinerated, the subsequent equipment is not easy to corrode in the treatment process, and a byproduct sulfuric acid can be generated. The high-sulfur waste incineration system 10 can be applied to a chemical production line or the like, and of course, the high-sulfur waste incineration system 10 can be used independently.

This high-sulfur waste incineration disposal system 10 is including the incineration device 12, the acid making device 15 and the desulphurization unit 17 that connect gradually, and it is through setting up the acid making device 15 after the incineration and before the desulfurization to avoid burning the high-sulfur flue gas and corrode follow-up equipment, and can generate byproduct sulfuric acid even 98% concentrated sulfuric acid, still improved the economic benefits that high-sulfur waste handled.

Wherein, incineration device 12 is used for burning high sulfur waste, and produces the elementary flue gas that contains sulphide, and acid making device 15 sets up behind incineration device 12, and acid making device 15 is used for receiving foretell elementary flue gas to use elementary flue gas as the raw materials to make the acid, with the concentration of producing sulphuric acid and secondary flue gas, and reduce the sulphur in the elementary flue gas, with the corruption of reducing the sulphur flue gas to follow-up equipment, and carry out further desulfurization treatment to secondary flue gas through desulphurization unit 17, with the clean flue gas that can discharge.

In this way, the acid making device 15 is arranged after incineration and before desulfurization, so as to reduce the concentration of sulfur in the incinerated flue gas, avoid corrosion of subsequent equipment, and generate a sulfuric acid byproduct, thereby improving the economic benefit of high-sulfur waste treatment.

The existing treatment system is used for directly carrying out desulfurization treatment by the deacidification tower after cooling, neutralizing and dedusting after incinerating wastes, and generates high-sulfur flue gas for the high-sulfur wastes, and the high concentration of SO2 in the flue gas also causes higher acid dew point of the flue gas after incinerating the high-sulfur wastes, SO that the serious corrosion to cooling and subsequent equipment can be caused, in the treatment process, the consumption of the desulfurizing agent is huge, and a large amount of desulfurized fly ash can be additionally generated at the same time, SO that the effect of reducing the hazardous wastes can not be achieved, but a large amount of fly ash is increased, and the later-stage operation and fly ash landfill cost is also huge.

The present embodiment provides a high-sulfur waste incineration system 10, which can treat high-sulfur waste, such as hazardous waste with a sulfur content greater than 10%. And the flue gas with the concentration of sulfur dioxide in the flue gas of 6-12% can be treated, and the corrosion of the high-sulfur flue gas to subsequent equipment is avoided.

For example, the high-sulfur waste incineration system 10 provided in this embodiment can treat two types of hazardous waste rolled steel sludge and coking distillation residues produced in a factory in the ferrous metallurgy industry.

The main components of the residue of the coking and rectifying residue are mixed salt and sulfur, the mixed salt comprises ammonium thiosulfate ((NH4)2S2O3), ammonium thiocyanate (NH4SCN), ammonium sulfate ((NH4)2SO4), ammonium sulfite ((NH4)2SO3), sulfur (S), a small amount of organic matters and the like, and the mixed salt has basically no calorific value. The coke oven gas desulfurization process of the coke-oven plant mainly comprises the step of absorbing H2S and HCN in the coke oven gas by using ammonia water under the action of a catalyst. In order to maintain high desulfurization efficiency, the salt concentration of the desulfurization liquid needs to be controlled to be less than 20%, so that the desulfurization waste liquid needs to be discharged periodically to maintain the salt balance of the whole desulfurization system.

The steel rolling oil sludge is a three-phase mixture of oil, water and iron-containing sludge generated in a steel rolling process, and the appearance of the steel rolling oil sludge is gray black and slightly red. The steel rolling oil sludge has higher low-level heating value and can be stably and continuously combusted.

Steel rolling oil sludge: HW08 waste mineral oil and mineral oil containing waste, waste code 900-; coking rectification residue: HW11 distillation residue, waste code 252-. The steel rolling oil sludge and the coking rectification residue are recorded in national hazardous waste records and are toxic and harmful wastes which need to be effectively treated.

The high-sulfur waste incineration system 10 provided in this embodiment can cooperatively process the two high-sulfur wastes, perform harmless and reduction treatment on the high-sulfur wastes, and generate a sulfuric acid or concentrated sulfuric acid byproduct with certain economic benefits. The sulfur content of the materials in the conventional hazardous waste rotary kiln 121 incineration system needs to be controlled between 2% and 4% to avoid the corrosion of the equipment by SO2 in the incineration flue gas.

With continued reference to fig. 1, the acid making device 15 may include a cooling mechanism 152 and an acid making mechanism 153 connected in sequence, where the cooling mechanism 152 is connected to the incineration device 12, the acid making mechanism 153 is connected to the desulfurization device 17, the cooling mechanism 152 is configured to cool the primary flue gas for subsequent acid making, and the acid making mechanism 153 is configured to introduce the cooled primary flue gas for making acid, and generate the sulfuric acid and the secondary flue gas with lower sulfur content.

Wherein, the temperature of the primary flue gas cooled by the cooling mechanism 152 is less than or equal to 200 ℃, thereby effectively inhibiting the generation of dioxin. In this embodiment, the cooling mechanism 152 is a quenching tower.

The concentration of sulfur dioxide in the secondary flue gas generated by the acid making device 15<50mg/Nm³So as to reduce the corrosion of the secondary flue gas to the desulphurization device 17, and facilitate the desulphurization device 17 to process the secondary flue gas and generate clean flue gas which can be directly discharged.

It should be noted that the sulfur dioxide concentration of the secondary flue gas entering the desulfurization device 17 for desulfurization treatment is reduced to 50mg/Nm³So as to facilitate the discharge after reaching the standard. In this embodiment, the desulfurization device 17 includes a first deacidification tower 171, a second deacidification tower 172 and a flue gas heater 173 connected in sequence, in other words, the secondary flue gas is subjected to desulfurization treatment by the first deacidification tower 171 and the second deacidification tower 172 in sequence, so as to reduce the concentration of sulfur dioxide in the secondary flue gas to 50mg/Nm³Thereafter, the flue gas is heated by the flue gas heater 173 to produce clean flue gas emissions.

Further, the acid making device 15 may further include a dust removing mechanism 151, and the dust removing mechanism 151 is connected between the incineration device 12 and the cooling mechanism 152, or the dust removing mechanism 151 removes dust from the primary flue gas first and then cools the primary flue gas. The dust removal operation is performed firstly, so that the corrosion of the high-sulfur flue gas to the dust removal mechanism 151 in the process of cooling and then removing dust is avoided.

Moreover, after the dust removal mechanism 151 removes dust from the primary flue gas, the dust content of the primary flue gas removed by the dust removal mechanism 151 is less than or equal to 30mg/Nm³So as to facilitate subsequent cooling and acid making and improve the cleanliness of acid making.

And the dust removing mechanism 151 is a high temperature ceramic cartridge dust remover in this embodiment. So as to improve the dust removal effect and avoid the situation that the dust removal mechanism 151 is out of work due to too high concentration of sulfur dioxide in the primary flue gas.

It should be noted that the acid making apparatus 15 may further comprise an ash scraper conveyor 155 and an ash storage bin 156 connected in series, wherein the ash scraper conveyor 155 is connected to the dust removing mechanism 151 to receive ash.

Further, the incineration device 12 may include a rotary kiln 121 and a secondary combustion chamber 122 connected in sequence, wherein the rotary kiln 121 is used for incinerating the high-sulfur waste and generating flue gas with a temperature of 850-.

Further, the incineration device 12 may further include a waste heat mechanism 123, the waste heat mechanism 123 is connected between the secondary combustion chamber 122 and the acid making device 15, wherein the waste heat mechanism 123 is configured to cool the primary flue gas, and reduce the temperature of the primary flue gas passing through the waste heat mechanism 123 to between 500 ℃ and 600 ℃. So as to facilitate the operation of acid making and the like. The temperature of the second primary flue gas cooled by the waste heat mechanism 123 is preferably 550 ℃.

It should be noted that the incinerator 12 further includes a waste storage pit 1241, a transfer grab 124, a material conveyor 125 or a crusher 126, which are disposed near the rotary kiln 121, to convey the high-sulfur waste to the rotary kiln 121, and in addition, the incinerator 12 may further include a water-sealed tank 127, a slag conveyor 128 and a slag storage bin 129, which are sequentially connected, the water-sealed tank 127 is disposed near the rotary kiln 121 and is configured to receive the slag, and the slag conveyor 128 is configured to convey the slag from the water-sealed tank 127 to the slag storage bin 129. And the ash scraper conveyor 155 may also be connected to the waste heat mechanism 123 to receive the ash.

The operation principle of the high-sulfur waste incineration disposal system 10 provided by the first embodiment of the invention is as follows:

high-sulfur waste consisting of steel rolling oil sludge and coking rectification residues is conveyed by a transfer grab bucket 124, a material conveyor 125 or a crusher 126 and enters a rotary kiln 121 for incineration, and the temperature of the kiln tail is kept between 850 ℃ and 900 ℃;

the flue gas of the rotary kiln 121 enters the secondary combustion chamber 122 for secondary combustion, and the temperature of the primary flue gas at the flue gas outlet of the secondary combustion chamber 122 is 1050 ℃ and 1150 ℃;

the flue gas at about 1100 ℃ after passing through the secondary combustion chamber 122 enters the waste heat mechanism 123, and the temperature of the primary flue gas is controlled between 500 ℃ and 600 ℃ by the waste heat mechanism 123, or 550 ℃;

the primary flue gas enters a high-temperature ceramic filter cylinder dust remover, and the high-temperature ceramic filter cylinder dust remover ensures that the dust content in the primary flue gas is 30mg/Nm³The following;

the primary flue gas enters the cooling mechanism 152 again, and the cooling mechanism 152 cools the primary flue gas so that the temperature of the primary flue gas is below 200 ℃ to inhibit the regeneration of dioxin;

the primary flue gas with higher sulfur dioxide concentration enters the acid making mechanism 153 again, sulfuric acid with the concentration of 98 percent can be produced by the sulfur dioxide flue gas with the concentration of 6 to 12 percent, and the generated sulfur dioxide concentration is less than 50mg/Nm³The secondary flue gas passes through the acid making device 15 arranged after incineration and before desulfurization, so that the high-sulfur flue gas in incineration is prevented from corroding subsequent equipment, a byproduct sulfuric acid or even concentrated sulfuric acid can be generated, and the economic benefit of high-sulfur waste treatment is improved;

the secondary flue gas enters a desulphurization device 17 for desulphurization treatment to generate the sulfur dioxide with the concentration reduced to 50mg/Nm³The following clean flue gas is discharged.

In summary, the following steps:

the embodiment of the invention provides a high-sulfur waste incineration treatment system 10, which has the characteristics that high-sulfur waste can be incinerated, follow-up equipment is not easy to corrode in the treatment process, and a byproduct sulfuric acid can be generated.

Second embodiment:

referring to fig. 2, fig. 2 is a schematic flow chart of a high-sulfur waste incineration disposal method according to a second embodiment of the present invention.

It should be noted that the basic principle and the technical effects of the incineration disposal method for high-sulfur waste provided by the embodiment are the same as those of the above embodiment, and for the sake of brief description, the corresponding contents in the above embodiment can be referred to for the parts not mentioned in the embodiment.

The high-sulfur waste incineration treatment method comprises the following steps:

step S101: and (3) carrying out acid preparation on primary flue gas containing sulfides generated by burning high-sulfur waste, and carrying out desulfurization treatment on secondary flue gas obtained after acid preparation.

By making acid after incineration and before desulfurization, high-sulfur flue gas generated by incineration is prevented from corroding subsequent equipment, and by-product sulfuric acid and even concentrated sulfuric acid can be generated by the high-sulfur flue gas, so that the economic benefit of high-sulfur waste treatment is improved.

Before the step of making acid from the primary flue gas, the treatment method may further comprise:

step S100: sequentially dedusting and cooling the primary flue gas to ensure that the temperature of the primary flue gas is reduced to be less than or equal to 200 ℃, and the dust content of the primary flue gas is less than or equal to 30mg/Nm³。

The primary flue gas is subjected to dust removal operation, and then is subjected to cooling treatment. So as to avoid the corrosion of the high-sulfur flue gas to the dust removing mechanism 151 in the process of cooling and dust removing. And the cleanliness of the acid is improved. And the primary flue gas is cooled so as to facilitate subsequent acid making and effectively inhibit the generation of dioxin.

The working principle of the incineration treatment method for the high-sulfur waste provided by the second embodiment of the invention is as follows:

sequentially dedusting and cooling the primary flue gas to ensure that the temperature of the primary flue gas is reduced to be less than or equal to 200 ℃, and the dust content of the primary flue gas is less than or equal to 30mg/Nm³(ii) a Avoid fallingThe corrosion of high-sulfur flue gas to dust removal mechanism 151 in the process of warm dust removal again, and improve the acid making cleanliness factor, and cool down elementary flue gas to carry out follow-up acid making, and the production of effectual suppression dioxin. High-sulfur flue gas generated by incineration is prevented from corroding subsequent equipment, and by-products sulfuric acid and even concentrated sulfuric acid can be generated by the high-sulfur flue gas, so that the economic benefit of high-sulfur waste treatment is improved.

In summary, the following steps:

the embodiment of the invention provides a high-sulfur waste incineration treatment method, which has the characteristics that the high-sulfur waste can be incinerated, the subsequent equipment is not easy to corrode in the treatment process, and a byproduct sulfuric acid can be generated.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that the features in the above embodiments may be combined with each other and the present invention may be variously modified and changed without conflict. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present embodiments are to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.