CN210964601U - Sodium-based flue gas desulfurization byproduct treatment device - Google Patents
Sodium-based flue gas desulfurization byproduct treatment device Download PDFInfo
- Publication number
- CN210964601U CN210964601U CN201921287858.5U CN201921287858U CN210964601U CN 210964601 U CN210964601 U CN 210964601U CN 201921287858 U CN201921287858 U CN 201921287858U CN 210964601 U CN210964601 U CN 210964601U
- Authority
- CN
- China
- Prior art keywords
- sodium
- flue
- desulfurization
- regenerant
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The application relates to a sodium-based flue gas desulfurization byproduct processing apparatus, sodium-based flue gas desulfurization byproduct processing apparatus includes sodium-based desulphurization apparatus, the sack cleaner, desulfurization byproduct material storehouse, quick lime feed bin, desulfurizer regeneration retort, cyclone, the vacuum hydroextractor, regenerant feed tank, sodium-based desulphurization apparatus, the sack cleaner, desulfurization byproduct material storehouse, desulfurizer regeneration retort, cyclone communicates in proper order, quick lime feed bin and desulfurizer regeneration retort intercommunication, cyclone first export and regenerant feed tank intercommunication, cyclone second export and vacuum hydroextractor intercommunication, vacuum hydroextractor first export communicates to the gypsum place of depositing after the dehydration, vacuum hydroextractor second export communicates to regenerant feed tank, regenerant feed tank and sodium-based desulphurization apparatus intercommunication. The device has the advantages of simple structure, convenience in use, low cost, good effect and high utilization rate of byproducts.
Description
Technical Field
The application relates to a sodium-based flue gas desulfurization byproduct processing apparatus is mainly applicable to the gypsum that will use sodium sulfite and sodium bisulfite to turn into the desulfurization byproduct of being convenient for industrial application as the principal ingredients, gets into the desulfurization again after filling up alkali with the absorbent of regeneration and handles.
Background
In recent years, with the stricter limit of the emission standard of the atmospheric pollutants, a plurality of novel flue gas treatment technologies are developed. For flue gas desulfurization projects with low sulfur dioxide concentration such as coke oven flue gas, the traditional wet desulfurization process is not applicable because the coke oven flue gas has special components and the flue gas temperature is required to be kept to be not lower than 170 ℃, and the flue gas after wet desulfurization cannot be directly discharged through the original coke oven chimney, so the dry or semi-dry desulfurization process is usually adopted. Compared with the traditional calcium-based desulfurization, the sodium-based absorbent can better match the flue gas temperature, has better desulfurization reaction effect, and forms lower flue gas temperature drop, thereby being widely recommended to use. However, the by-product formed by sodium-based desulfurization is mainly composed of sodium sulfite and sodium bisulfite, and is difficult to be directly applied in industry.
Disclosure of Invention
The technical problem that this application was solved is overcome the above-mentioned not enough that exists among the prior art, and provides a structure succinct, convenient to use, and is with low costs, effectual, and the high sodium base (dry process or semi-dry process, the same below) flue gas desulfurization accessory substance processing apparatus of accessory substance utilization ratio.
The working principle of the method is that Ca (OH) 2 is used for replacing the main components of the sodium-based desulfurization by-products: na2SO3\ NaHSO3, which are subjected to displacement reaction to form CaSO4, gypsum capable of being applied to industry is formed by utilizing dehydration equipment, and the regenerated absorbent enters a re-desulfurization process after alkali supplement treatment. The method solves the problem that the sodium-based desulfurization byproducts are difficult to treat, has high integration level of a process system, fully converts and utilizes materials, and greatly reduces the desulfurization cost.
The technical scheme adopted by the application for solving the technical problems comprises the following steps: a sodium-based flue gas desulfurization byproduct treatment device comprises a sodium-based desulfurization device, a bag-type dust remover, a desulfurization byproduct material bin, a quicklime bin, a desulfurizer regeneration reaction tank, a cyclone separator, a vacuum dehydrator and a regenerant liquid supply tank, wherein the sodium-based desulfurization device, the bag-type dust remover, the desulfurization byproduct material bin, the desulfurizer regeneration reaction tank and the cyclone separator are sequentially communicated, the quicklime bin is communicated with the desulfurizer regeneration reaction tank, a first outlet of the cyclone separator is communicated with the regenerant liquid supply tank (the concentration of flowing liquid is 5-15 percent, and the main component is sodium hydroxide absorbent), a second outlet of the cyclone separator is communicated with the vacuum dehydrator (the concentration of flowing liquid is 40-55 percent, and the main component is gypsum), a first outlet of the vacuum dehydrator is communicated to a gypsum storage place with the moisture content of less than 10 percent after dehydration, and a second outlet of the vacuum dehydrator (the sodium hydroxide absorbent and water) is communicated to the regenera, the regenerant feed tank is communicated with the sodium-based desulfurization device.
According to a further scheme, a sodium bicarbonate bin, a dry powder flue injection device and a regenerant flue atomization spray gun device are further arranged for utilization of a regenerated absorbent combined with a dry desulfurization method, one outlet of the sodium bicarbonate bin is communicated with a regenerant liquid supply tank, the other outlet of the sodium bicarbonate bin is communicated with the dry powder flue injection device, the sodium-based desulfurization device adopts a flue and injection equipment, and the dry powder flue injection device and the regenerant flue atomization spray gun device are sequentially arranged in the flue and the flue of the injection equipment. Preferably, the flue and the flue of the injection device are provided with a plurality of dry powder injection inlets and a plurality of regenerant injection inlets in a staggered manner, the dry powder flue injection device is communicated with the flue and the flue of the injection device through the dry powder injection inlets, the regenerant flue atomization spray gun device is provided with a plurality of regeneration absorbent spray guns, the regeneration absorbent spray guns are respectively placed in the regeneration agent injection inlets (in one-to-one correspondence) and face the flue, the coverage rate and uniformity of the section of the flue are ensured, and the micron-sized liquid drop particles sprayed in an atomized manner can strengthen stirring contact between the flue and the dry powder (sodium bicarbonate), so that the desulfurization reaction is carried out more fully.
According to the further scheme, a sodium carbonate bin, a sodium carbonate liquid preparation tank and a rotary spray atomizer are further arranged for utilization of the regenerated absorbent combined with the semi-dry desulfurization method, the sodium-based desulfurization device adopts a rotary spray desulfurization tower, the rotary spray atomizer is arranged in the rotary spray desulfurization tower, the regenerant liquid supply tank is communicated with the sodium carbonate liquid preparation tank, the sodium carbonate bin is communicated with the sodium carbonate liquid preparation tank, and the sodium carbonate liquid preparation tank is communicated with the rotary spray atomizer.
The treatment method of the sodium-based flue gas desulfurization byproduct treatment device comprises the following steps:
s1: introducing sulfur-containing flue gas and a regenerated absorbent into a sodium-based desulfurization device respectively;
s2: desulfurizing sulfur-containing flue gas passing through a sodium-based desulfurization device;
s3: discharging the flue gas after desulfurization treatment by a bag-type dust collector; the solid byproducts after desulfurization treatment enter a desulfurization byproduct material bin through a bag-type dust remover and a sodium-based desulfurization device respectively;
s4: simultaneously inputting the desulfurization byproducts in the desulfurization byproduct material bin, quicklime and water into a desulfurizer regeneration reaction tank for reaction to obtain calcium sulfite and sodium hydroxide, fully stirring and blowing air by using an oxidation fan to promote the calcium sulfite to be further oxidized into calcium sulfate;
s5: pumping the solid-liquid mixed solution fully reacted in the last step into a cyclone separator for primary solid-liquid separation, leading the liquid after the primary separation to enter a regenerant liquid supply tank through a first outlet of the cyclone separator, leading the concentration of the primary separated liquid to be 5-15 percent, leading the main component to be sodium hydroxide, leading the solid substance after the primary separation to enter a vacuum dehydrator for dehydration through a second outlet of the cyclone separator to prepare gypsum with the water content of less than 10 percent, and leading the dehydrated waste water (the liquid after the secondary separation, leading the main component to be also sodium hydroxide) to enter the regenerant liquid supply tank.
The sodium-based desulfurization device is further improved in a dry desulfurization mode, a flue and injection equipment are adopted, meanwhile, sodium bicarbonate is injected into the flue through a dry powder flue injection device, and a regeneration absorbent in a regeneration agent liquid supply tank is injected into the flue through a regeneration agent flue atomization spray gun device after the pH value of the regeneration absorbent is adjusted to 9-12 through the sodium bicarbonate; then, desulfurizing the sulfur-containing flue gas passing through the flue and the injection equipment; discharging the flue gas after desulfurization treatment by a bag-type dust collector; the solid byproducts after desulfurization treatment enter a desulfurization byproduct material bin through a bag-type dust collector, a flue and an injection device respectively; the following steps are completely the same as the treatment method of a sodium-based flue gas desulfurization byproduct device (referring to a general dry and semi-dry device shown in figure 1).
The application aims at further improvement of a semi-dry desulfurization mode, the sodium-based desulfurization device adopts a rotary spray desulfurization tower, and meanwhile, the regenerated absorbent and sodium carbonate are introduced into a sodium carbonate solution preparation tank together, so that the pH value of a mixed solution of the regenerated absorbent and the sodium carbonate is adjusted to 9-12, and the mixed solution of the regenerated absorbent and the sodium carbonate is input into a rotary spray atomizer and is in gas-liquid contact with sulfur-containing flue gas introduced by a flue gas distributor at the top of the rotary spray desulfurization tower; then, desulfurizing the sulfur-containing flue gas passing through the rotary spray desulfurization tower; discharging the flue gas after desulfurization treatment by a bag-type dust collector; the solid byproducts after desulfurization treatment enter a desulfurization byproduct material bin through a bag-type dust remover and a rotary spray desulfurization tower respectively; the following steps are completely the same as the treatment method of a sodium-based flue gas desulfurization byproduct device (referring to a general dry and semi-dry device shown in figure 1).
Compared with the prior art, the application has the following advantages and effects: the structure is simple, the use is convenient, the cost is low, the effect is good, and the utilization rate of byproducts is high.
Drawings
FIG. 1 is a schematic structural diagram of a sodium-based flue gas desulfurization byproduct treatment device according to an embodiment of the present application.
Fig. 2 is a schematic view of a partial structure of a regenerated absorbent combined with dry flue gas desulfurization in the embodiment of the present application (i.e., a schematic view of a modified part of a sodium-based flue gas desulfurization byproduct processing apparatus in the embodiment of the present application during dry desulfurization).
Fig. 3 is a schematic view of a partial structure of a regenerated absorbent combined with semi-dry flue gas desulfurization in the embodiment of the present application (i.e., a schematic view of a modified part of a sodium-based flue gas desulfurization byproduct treatment device in the embodiment of the present application during semi-dry desulfurization).
In the figure: the main body of the 1-sodium-based desulfurization device adopts a dry desulfurization process as a flue and injection equipment, and adopts a semi-dry desulfurization process as a rotary spray desulfurization tower; 2-bag dust collector; 3-a desulfurization byproduct material bin; 4-quicklime bin; 5-a desulfurizing agent regeneration reaction tank; 6-a cyclone separator; 7-vacuum dewatering machine; 8-a regenerant feed tank; 9-sodium bicarbonate silo; 10-dry powder flue injection device; 11-a regenerant flue atomizing spray gun device; 12-a sodium carbonate silo; 13-sodium carbonate preparation tank; 14-Rotary spray atomizer.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples. The present application is referred to in the context of fluid flow.
Referring to fig. 1 to 3, in this embodiment, the desulfurization byproducts are conveyed from a sodium-based desulfurization device 1, a bag-type dust collector 2, and the like to a desulfurization byproduct bin 3 through an ash conveying pipeline, and then enter a desulfurizer regeneration reaction tank 5, quicklime enters the desulfurizer regeneration reaction tank 5 from a quicklime bin 4 and is added with water, quicklime, and desulfurization byproducts (main components are sodium sulfite and sodium bisulfite) are retained in the desulfurization regeneration reaction tank 5 for a period of time, the limewater reacts with the desulfurization byproducts to generate calcium sulfite and sodium hydroxide, and an oxidation fan is used to blow air while fully stirring, so as to promote further oxidation of the calcium sulfite into calcium sulfate. Pumping the solid-liquid mixed solution after full reaction into a cyclone separator 6 for primary solid-liquid separation, wherein the concentration of the upstream liquid at the first outlet of the cyclone separator 6 after separation is 5-15%, the main component is a regenerated absorbent (sodium hydroxide) and enters a regenerant liquid supply tank 8, the concentration of the bottom liquid at the second outlet of the cyclone separator 6 is 40-55%, the downstream liquid enters a vacuum dehydrator 7 for dehydration to prepare gypsum with the water content of less than 10%, and the wastewater after dehydration enters the regenerant liquid supply tank 8. The regenerated absorbent (simply referred to as regenerant) in the regenerant feed tank 8 is reused in the sodium-based desulfurization apparatus 1 for desulfurization again.
In a further scheme, for the utilization of the regenerated absorbent combined with a dry desulfurization method, a conveying main pipe is additionally arranged in a sodium bicarbonate bin 9, sodium bicarbonate is conveyed to a regenerated absorbent liquid supply tank 8 to adjust the pH value of the regenerated absorbent to 9-12, the sodium bicarbonate bin 9 is communicated to the appropriate reduction (usually 5-30 wt.%) of the dry powder consumption for desulfurization through a dry powder flue injection device 10, the dry powder flue injection device 10 and a regenerated absorbent flue atomization spray gun device 11 (comprising more than one regenerated absorbent spray gun) are sequentially (front and back) arranged in a flue and a flue of an injection device, and the regenerated absorbent is atomized and injected for re-desulfurization. Preferably, the dry powder injection inlets and the regenerant injection inlets are arranged along the cross section of the flue and the flue section of the injection device in a staggered manner, so that the coverage rate and uniformity of the cross section of the flue are ensured, and the micron-sized liquid drop particles sprayed in an atomized manner can strengthen the stirring contact between the flue gas and the dry powder (sodium bicarbonate), so that the desulfurization reaction is carried out more fully.
In a further scheme, for the utilization of the regenerated absorbent combined with a semi-dry desulfurization mode, the regenerated absorbent is directly pumped from a regenerated agent liquid supply tank 8 to a sodium carbonate liquid preparation tank 13, sodium carbonate powder is conveyed to the sodium carbonate liquid preparation tank 13 by a sodium carbonate bin 12, the sodium carbonate powder and the sodium carbonate liquid preparation tank are mixed to adjust the pH value of a mixed solution to 9-12, then the mixed solution is sprayed into a rotary spray desulfurization tower through a rotary spray atomizer 14, and the mixed solution and raw flue gas introduced by a flue gas distributor at the top of the rotary spray desulfurization tower are subjected to gas-liquid contact desulfurization reaction.
The sodium-based flue gas desulfurization byproduct treatment device can be used for flue gas desulfurization projects with low sulfur dioxide concentration, such as coke ovens, gas boilers and the like, ensures higher desulfurization efficiency, does not influence the temperature of discharged smoke, realizes full conversion and utilization of materials, and has strong practicability. The sodium-based flue gas desulfurization byproduct treatment device is simple in structure, low in investment and operation cost, small in investment, short in construction period and suitable for modification projects.
All simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.
Claims (4)
1. The utility model provides a sodium-based flue gas desulfurization accessory substance processing apparatus, includes sodium-based desulphurization unit, sack cleaner, desulfurization accessory substance storehouse, quick lime feed bin, desulfurizer regeneration retort, cyclone, vacuum dehydration machine, regenerant feed tank, characterized by: the system comprises a sodium-based desulfurization device, a bag-type dust collector, a desulfurization byproduct material bin, a desulfurizer regeneration reaction tank and a cyclone separator, wherein the quick lime material bin is communicated with the desulfurizer regeneration reaction tank, a first outlet of the cyclone separator is communicated with a regenerant liquid supply tank, a second outlet of the cyclone separator is communicated with a vacuum dehydrator, a first outlet of the vacuum dehydrator is communicated to a dehydrated gypsum storage place, a second outlet of the vacuum dehydrator is communicated to the regenerant liquid supply tank, and the regenerant liquid supply tank is communicated with the sodium-based desulfurization device.
2. The sodium-based flue gas desulfurization byproduct treatment device of claim 1, characterized in that: still be provided with sodium bicarbonate feed bin, dry powder flue injection apparatus, regenerant flue atomizing spray gun device, an export and regenerant feed tank intercommunication in sodium bicarbonate feed bin, another export and dry powder flue injection apparatus intercommunication in sodium bicarbonate feed bin, sodium-based desulphurization unit adopts flue and injection apparatus, arranges dry powder flue injection apparatus, regenerant flue atomizing spray gun device in proper order in the flue of flue and injection apparatus.
3. The sodium-based flue gas desulfurization byproduct treatment device of claim 2, characterized in that: the dry powder flue spraying device is communicated with the flue and the flue of the spraying equipment through the dry powder spraying inlets, the regenerant flue atomizing spray gun device is provided with a plurality of regenerative absorbent spray guns, and the regenerative absorbent spray guns are respectively placed in the regenerative absorbent spraying inlets and face the flue.
4. The sodium-based flue gas desulfurization byproduct treatment device of claim 1, characterized in that: still be provided with sodium carbonate feed bin, sodium carbonate and join in marriage fluid reservoir, rotatory spraying atomizer, sodium-based desulphurization unit adopts rotatory spraying desulfurizing tower, sets up rotatory spraying atomizer in the rotatory spraying desulfurizing tower, and the regenerant supplies the fluid reservoir to join in marriage with the sodium carbonate and joins in marriage the fluid reservoir intercommunication, and the sodium carbonate is joined in marriage the fluid reservoir and is linked in marriage with rotatory spraying atomizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287858.5U CN210964601U (en) | 2019-08-09 | 2019-08-09 | Sodium-based flue gas desulfurization byproduct treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287858.5U CN210964601U (en) | 2019-08-09 | 2019-08-09 | Sodium-based flue gas desulfurization byproduct treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210964601U true CN210964601U (en) | 2020-07-10 |
Family
ID=71453670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921287858.5U Active CN210964601U (en) | 2019-08-09 | 2019-08-09 | Sodium-based flue gas desulfurization byproduct treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210964601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368800A (en) * | 2019-08-09 | 2019-10-25 | 浙江大学 | Sodium base flue gas desulfurization byproduct processing unit and processing method |
-
2019
- 2019-08-09 CN CN201921287858.5U patent/CN210964601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368800A (en) * | 2019-08-09 | 2019-10-25 | 浙江大学 | Sodium base flue gas desulfurization byproduct processing unit and processing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100496675C (en) | Simultaneous desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof | |
| CN101157003B (en) | Wet-type ammonia flue gas purification technics for associated desulfuration demercuration and system | |
| CN204865475U (en) | Coal -fired power plant boiler flue gas desulphurization device | |
| CN205164488U (en) | Mixed flue gas wet flue gas desulfurization device of fire coal - catalysis | |
| CN101342459A (en) | Exhuast gas desulfurization, recycle and treatment method and apparatus | |
| CN105032137B (en) | A kind of quick lime-ammonia associating flue gas desulfurization and denitrification integrated apparatus | |
| CN105944536A (en) | Coke oven flue gas desulfurization technology and system | |
| CN101385941B (en) | Efficient circulating fluid bed flue-gas desulfurizing device | |
| CN107899408B (en) | Wet method and dry method combined flue gas desulfurization system and desulfurization method | |
| CN103961996A (en) | Fume purification system with tower box | |
| CN217220890U (en) | Domestic waste burns flue gas denitration deacidification dust removal integration system of optimization | |
| CN204502787U (en) | A kind of quick lime-ammoniacal liquor associating flue gas desulfurization and denitrification integrated apparatus | |
| CN105107366A (en) | Direct flow spraying semi-dry type flue gas desulfurization method | |
| CN210964601U (en) | Sodium-based flue gas desulfurization byproduct treatment device | |
| CN106178877A (en) | A kind of coke oven flue waste gas purification waste heat recovery apparatus and technique | |
| CN206621985U (en) | A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system | |
| CN206082145U (en) | Wet flue gas desulfurization system | |
| CN205598949U (en) | Coke oven smoke desulfurization system | |
| CN108636037A (en) | A kind of catalytic cracking flue gas wet desulphurization denitration dust collecting technique and system and device | |
| CN110368800A (en) | Sodium base flue gas desulfurization byproduct processing unit and processing method | |
| CN208927936U (en) | A kind of flue-gas dust-removing and desulfurization denitrification integrated device | |
| CN210286777U (en) | High-efficient system that utilizes of desulfurization accessory substance | |
| CN113559692A (en) | Double-tower double-circulation semi-dry desulfurization device, process and application | |
| CN205308130U (en) | High -speed rotatory vortex wet flue gas desulfurization system of ultralow purification of flue gas limit | |
| CN111790264A (en) | Treatment process for desulfurization tower bottom ash based on SDA (SDA) semidry method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |