CN113443673A - Spray drying tower - Google Patents
Spray drying tower Download PDFInfo
- Publication number
- CN113443673A CN113443673A CN202110769329.4A CN202110769329A CN113443673A CN 113443673 A CN113443673 A CN 113443673A CN 202110769329 A CN202110769329 A CN 202110769329A CN 113443673 A CN113443673 A CN 113443673A
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- CN
- China
- Prior art keywords
- flue gas
- spray drying
- atomizer
- drying tower
- tower body
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- 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.)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The invention discloses a spray drying tower, comprising: the device comprises a flue gas inlet, a tower body, an atomizer, a feed opening and a flue gas outlet; the flue gas inlet is used for receiving dry flue gas; the top of the tower body is connected with the flue gas inlet and is used for conveying the received dry flue gas to the atomizer; the atomizer is arranged in the center of the tower body and is used for performing drying operation and dust removal operation on the dry flue gas to obtain dry flue gas; the feed opening is arranged at the bottom of the tower body and used for discharging residual dust generated by the dust removal operation of the atomizer; and the flue gas outlet is arranged at the bottom of the tower body and above the feed opening and used for discharging the dry flue gas. Aiming at the problem of poor atomization and evaporation effects of the existing spray drying tower for desulfurization wastewater, the spray drying tower structure with the uniformly distributed airflow field is provided, so that the atomization and evaporation performance can be improved, and further, the atomization comprehensive cost can be reduced.
Description
Technical Field
The invention relates to the technical field of drying equipment, in particular to a spray drying tower.
Background
Currently, a large number of coal-fired power plants reduce sulfur oxide emissions by: the coal dust before combustion is subjected to desulfurization pretreatment, and the flue gas after combustion is subjected to desulfurization treatment. The desulfurization treatment of the flue gas mainly adopts a limestone-gypsum desulfurization process, the emission of sulfur oxides can be effectively reduced by the desulfurization process, and the pollution hazard degree of the desulfurization waste liquid formed in the desulfurization process is higher.
The method for treating the desulfurization waste liquid at the present stage comprises the following steps: chemical precipitation, evaporative crystallization, main flue evaporation, bypass flue evaporation and rotary spray drying. The rotary drying technology, which is the most widely adopted technology in recent years, can realize harmless treatment of the desulfurization waste liquid, but the spray drying tower at the present stage cannot be well adapted to the application of the rotary spray drying technology, so that the problems of poor atomization and evaporation effects and large space waste of the tower body occur.
Disclosure of Invention
The invention provides a spray drying tower, which aims at solving the problem of poor atomization and evaporation effects of the existing spray drying tower for desulfurization wastewater, provides a spray drying tower structure with uniformly distributed airflow fields, and is beneficial to improving atomization and evaporation performances and further reducing atomization comprehensive cost.
The invention provides a spray drying tower, comprising: the device comprises a flue gas inlet, a tower body, an atomizer, a feed opening and a flue gas outlet;
the flue gas inlet is a double flue gas inlet; the flue gas inlet is used for receiving dry flue gas;
the top of the tower body is connected with the flue gas inlet and is used for conveying the received dry flue gas to the atomizer;
the atomizer is arranged in the center of the tower body and is used for performing drying operation and dust removal operation on the dry flue gas to obtain dry flue gas;
the feed opening is arranged at the bottom of the tower body and used for discharging residual dust generated by the dust removal operation of the atomizer;
and the flue gas outlet is arranged at the bottom of the tower body and above the feed opening and used for discharging the dry flue gas.
Optionally, the method further comprises: an outer sleeve positioned over the tower body; the outer sleeve is used for storing the dry flue gas at the top of the tower body so as to increase the flowability of the dry flue gas.
Optionally, the outer sleeve is a triangular outer sleeve.
Optionally, the double flue gas inlets are centrosymmetrically arranged.
Optionally, the atomizer is a high speed rotating centrifugal atomizer.
Optionally, the nozzles of the high-speed rotating centrifugal atomizer are uniformly arranged around the high-speed rotating centrifugal atomizer.
Optionally, the atomized liquid droplet size of the high-speed rotating centrifugal atomizer is 60 μm.
Optionally, the high-speed rotating centrifugal atomizer atomizes the liquid in the form of horizontal spray.
Optionally, the flue gas outlet is equipped with a dust remover.
Optionally, the dust remover is specifically an electric dust remover.
According to the technical scheme, the invention has the following advantages:
in an inventive spray drying tower, comprising: the device comprises a flue gas inlet, a tower body, an atomizer, a feed opening and a flue gas outlet; the flue gas inlet is a double flue gas inlet; the flue gas inlet is used for receiving dry flue gas; the top of the tower body is connected with the flue gas inlet and is used for conveying the received dry flue gas to the atomizer; the atomizer is arranged in the center of the tower body and is used for performing drying operation and dust removal operation on the dry flue gas to obtain dry flue gas; the feed opening is arranged at the bottom of the tower body and used for discharging residual dust generated by the dust removal operation of the atomizer; and the flue gas outlet is arranged at the bottom of the tower body and above the feed opening and used for discharging the dry flue gas.
So, acquire dry flue gas through two flue gas inlets, and increase the even degree that dry flue gas distributes among the flow process, then make dry flue gas enter the tower body, carry out the drying with the atomizer in the tower body, make the salt class of the waste water that holds in the atomizer dry and separate out, during the dust of former flue gas is sneaked into to the part, the part flows into the drying tower bottom, and the flue gas is also collected along with substances such as heavy metal and chloride ion that exist in the waste liquid in the feed opening together with the flue gas dust, realize "innocent treatment", it improves the evaporation performance to utilize, and then reduce the atomizing comprehensive cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic elevation view of a spray drying tower of the present invention;
fig. 2 is a schematic top view of a spray drying tower according to the present invention.
In the figure: 1. a flue gas inlet; 2. an outer sleeve; 3. a drying tower body; 4. rotating the atomizer at a high speed; 5. a feeding port; 6. and a flue gas outlet.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1 and 2, fig. 1 is a schematic front view of a spray drying tower according to the present invention, and fig. 2 is a schematic top view of the spray drying tower according to the present invention.
The spray drying tower of the scheme is mainly applied to: in order to reduce the emission of sulfur oxides, the coal-fired power plant mostly adopts a gypsum desulfurization process to carry out desulfurization treatment on flue gas after combustion, but the desulfurization waste liquid produced in the process is subjected to harmless treatment through a rotary drying technology at the present stage, and an applied spray drying tower cannot be well applied to the adaptive rotary spray drying technology, so that the problems of poor atomization and evaporation effects and the waste of a large amount of space of a tower body occur.
Specifically, the spray drying tower comprises: the device comprises a flue gas inlet 1, a drying tower body 3, an atomizer 4, a feed opening 5 and a flue gas outlet 6;
the flue gas inlet 1 is a double flue gas inlet; the flue gas inlet is used for receiving dry flue gas;
the top of the drying tower body 3 is connected with the flue gas inlet 1 and is used for conveying the received dry flue gas to the atomizer 4;
the atomizer 4 is arranged in the center of the drying tower body 3 and is used for performing drying operation and dust removal operation on the dry flue gas to obtain dry flue gas;
the feed opening 5 is arranged at the bottom of the drying tower body 3 and used for discharging residual dust generated by the dust removal operation of the atomizer;
and the flue gas outlet 6 is arranged at the bottom of the drying tower body 3 and above the feed opening 5 and is used for discharging the drying flue gas.
Further, the spray drying tower also comprises an outer sleeve 2 arranged on the tower body 3 of the drying tower; the outer sleeve 2 is used for storing the dry flue gas at the top of the drying tower body 3 so as to increase the flowability of the dry flue gas.
In order to increase the structural stability of the outer sleeve 2 and to reduce the space occupation of said outer sleeve 2, said outer sleeve 2 is a triangular outer sleeve.
In order to improve the uniform distribution of a flow field and further reduce the comprehensive atomization cost, the double flue gas inlets are symmetrically arranged in the center.
In order to improve the atomization and evaporation performance and further reduce the atomization comprehensive cost, the atomizer 4 is a high-speed rotation centrifugal atomizer.
Specifically, the nozzles of the high-speed rotating centrifugal atomizer are uniformly arranged around the high-speed rotating centrifugal atomizer.
In some embodiments, the atomized liquid droplets of the high-speed rotating centrifugal atomizer have a particle size of 60 μm, so that the optimal atomization and evaporation effects are achieved.
It should be noted that, as a result of numerical simulation by the applicant's experiment, the optimum atomized particle size of the liquid droplet is 60 μm, and therefore, the particle size of the liquid droplet atomized by the atomizer is set to 60 μm in the present application.
In order to reduce the energy loss of the flue gas carrying the dropping liquid to move to the tower wall and further improve the atomization and evaporation effects, the high-speed rotation centrifugal atomization liquid injection form is horizontal injection.
In order to enable substances such as heavy metal and chloride ions to be completely trapped together with dust and achieve harmless treatment, a dust remover is installed at the smoke outlet 6, and specifically the dust remover is an electric dust remover.
In the spray dryer provided by the invention, dry flue gas enters a tower body 3 of a tower to be dried through a flue gas inlet 1 which is arranged in a central symmetry manner, and is fully contacted with waste water fog drops atomized and sprayed by an atomizer 4, moisture in the fog drops is quickly volatilized, salts in the waste water are dried and separated out, part of the salts is mixed with dust of the flue gas and part of the salts flows into the bottom of the tower body 3 of the drying tower, and the treated flue gas enters a discharge hole to realize collection and treatment. Aiming at the problem of poor atomization and evaporation effects of the existing spray drying tower for desulfurization wastewater, the spray drying tower structure with the uniformly distributed airflow field is provided, so that the atomization and evaporation performance can be improved, and further, the atomization comprehensive cost can be reduced.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A spray drying tower, comprising: the device comprises a flue gas inlet, a tower body, an atomizer, a feed opening and a flue gas outlet;
the flue gas inlet is a double flue gas inlet; the flue gas inlet is used for receiving dry flue gas;
the top of the tower body is connected with the flue gas inlet and is used for conveying the received dry flue gas to the atomizer;
the atomizer is arranged in the center of the tower body and is used for performing drying operation and dust removal operation on the dry flue gas to obtain dry flue gas;
the feed opening is arranged at the bottom of the tower body and used for discharging residual dust generated by the dust removal operation of the atomizer;
and the flue gas outlet is arranged at the bottom of the tower body and above the feed opening and used for discharging the dry flue gas.
2. The spray drying tower of claim 1, further comprising: an outer sleeve positioned over the tower body; the outer sleeve is used for storing the dry flue gas at the top of the tower body so as to increase the flowability of the dry flue gas.
3. A spray drying tower according to claim 2, wherein the outer sleeve is a triangular outer sleeve.
4. A spray drying tower according to claim 2, wherein the dual flue gas inlets are centrosymmetrically arranged dual flue gas inlets.
5. A spray drying tower according to claim 1, wherein the atomiser is a high speed rotating centrifugal atomiser.
6. A spray drying tower according to claim 5, wherein the nozzles of the high speed rotary centrifugal atomizer are evenly arranged around the high speed rotary centrifugal atomizer.
7. A spray drying tower according to claim 5, wherein the atomized droplets of the high speed rotating centrifugal atomizer have a particle size of 60 μm.
8. A spray drying tower according to claim 5, wherein the high speed rotating centrifugal atomizer atomized liquid spray pattern is a horizontal spray.
9. A spray drying tower according to claim 1, wherein the flue gas outlet is fitted with a dust separator.
10. A spray drying tower according to claim 9, wherein the dust separator is in particular an electric dust separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110769329.4A CN113443673A (en) | 2021-07-07 | 2021-07-07 | Spray drying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110769329.4A CN113443673A (en) | 2021-07-07 | 2021-07-07 | Spray drying tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113443673A true CN113443673A (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110769329.4A Pending CN113443673A (en) | 2021-07-07 | 2021-07-07 | Spray drying tower |
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| Country | Link |
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| CN (1) | CN113443673A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114288690A (en) * | 2022-01-30 | 2022-04-08 | 江阴铠乐丰环境工程科技有限公司 | Spray drying tower with high-temperature flue gas for treating high-salinity high-organic-matter wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202802976U (en) * | 2012-10-11 | 2013-03-20 | 无锡多灵环保工程设备有限公司 | Secondary high-temperature cyclone dust remover |
| DE202013105968U1 (en) * | 2013-12-30 | 2014-03-27 | Wuxi Huahong Information Technology Co., Ltd. | Flue gas treatment tower, in particular flue gas deacidification tower with atomization |
| CN109133234A (en) * | 2018-10-10 | 2019-01-04 | 江苏海澜正和环境科技有限公司 | A kind of desulfurization wastewater Zero discharging system |
| CN110975584A (en) * | 2019-12-23 | 2020-04-10 | 陈军武 | Novel flue gas purification tower |
-
2021
- 2021-07-07 CN CN202110769329.4A patent/CN113443673A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202802976U (en) * | 2012-10-11 | 2013-03-20 | 无锡多灵环保工程设备有限公司 | Secondary high-temperature cyclone dust remover |
| DE202013105968U1 (en) * | 2013-12-30 | 2014-03-27 | Wuxi Huahong Information Technology Co., Ltd. | Flue gas treatment tower, in particular flue gas deacidification tower with atomization |
| CN109133234A (en) * | 2018-10-10 | 2019-01-04 | 江苏海澜正和环境科技有限公司 | A kind of desulfurization wastewater Zero discharging system |
| CN110975584A (en) * | 2019-12-23 | 2020-04-10 | 陈军武 | Novel flue gas purification tower |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114288690A (en) * | 2022-01-30 | 2022-04-08 | 江阴铠乐丰环境工程科技有限公司 | Spray drying tower with high-temperature flue gas for treating high-salinity high-organic-matter wastewater |
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Application publication date: 20210928 |