CN212833277U - Flue gas ozone denitration waste liquid treatment system - Google Patents
Flue gas ozone denitration waste liquid treatment system Download PDFInfo
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- CN212833277U CN212833277U CN202020206522.8U CN202020206522U CN212833277U CN 212833277 U CN212833277 U CN 212833277U CN 202020206522 U CN202020206522 U CN 202020206522U CN 212833277 U CN212833277 U CN 212833277U
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Abstract
The utility model provides a flue gas ozone denitration waste liquid treatment system, which comprises a dilatation unit, a first outlet and a second outlet, wherein the dilatation unit comprises a shell and a gas-liquid separation piece arranged in the shell; the denitration unit is connected with the expansion unit and comprises a heat exchange piece and a denitration piece connected with the heat exchange piece; and the sewage discharge unit comprises a fluidized bed connected to the bottom of the expansion unit, and a first drainage pump is connected between the shell and the fluidized bed. The utility model has the advantages that: the utility model discloses a carry out gas-liquid separation in advance, carry out denitration treatment afterwards, can effectively improve concentrated concentration, improve concentrated effect, carry out cyclic utilization to gas after gas-liquid separation handles simultaneously, the liquid water disposal load reduces, reduces denitration equipment volume, and microorganism denitrification facility simple structure has and is showing denitration effect.
Description
Technical Field
The utility model relates to a flue gas denitration technical field especially relates to a flue gas ozone denitration waste liquid treatment system.
Background
The requirement on air quality is higher and higher, and nitrogen oxide is one of main pollutants in the atmosphere, and the pollution of the nitrogen oxide attracts the attention of people. The flue gas denitration technology is always the key research point, and flue gas denitration refers to the removal of nitrogen oxides from flue gas, and is a main measure for controlling nitrogen oxide pollution and preventing acid rain harm in countries in the world. Wherein the low-temperature flue gas denitration technology is the simplest and most effective low-temperature oxidation technology, the nitric oxide in the flue gas is converted into a high valence state by using ozone, and the nitric oxide is separated from the flue gas by an alkali liquor spraying means.
The wet denitration by ozone oxidation has high efficiency and low investment, but the whole system is complex and has large water consumption, the speed of separating out nitrate by evaporation crystallization is slow, the crystallization amount is small, and the energy consumption is large. Therefore, in the oxidation denitration process, the nitrate in the waste liquid needs to be retreated, and the denitration waste liquid has higher temperature, so that the waste heat of the denitration waste liquid can be recycled through the flash tank, and therefore, the flue gas ozone denitration waste liquid treatment system is provided.
SUMMERY OF THE UTILITY MODEL
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.
In view of the gas-liquid that current flue gas waste liquid denitration exists integrative, the lower problem of concentration after the concentrated processing of denitration waste liquid has been proposed the utility model discloses.
Therefore, the utility model aims to solve the technical problem that utilize the flash tank to carry out gas-liquid separation to flue gas waste liquid, carry out cyclic utilization to partial gas, and then effectively improve the concentration of concentrated waste liquid, improve the denitration effect.
In order to solve the technical problem, the utility model provides a following technical scheme: the expansion unit comprises a shell and a gas-liquid separation piece arranged in the shell, and a first outlet is formed in the top of the shell; the denitration unit is connected with the expansion unit and comprises a heat exchange piece and a denitration piece connected with the heat exchange piece; and the sewage discharge unit comprises a fluidized bed connected to the bottom of the expansion unit, and a first drainage pump is connected between the shell and the fluidized bed.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: the gas-liquid separation piece comprises a lampshade type water inlet piece arranged on the inner side wall of the shell, and a steam-water separator is arranged on the upper portion of the lampshade type water inlet piece.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: the steam-water separator and the first outlet are connected through a draft tube to form communication.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: the heat exchange piece is connected with the first outlet, the heat exchange piece comprises a heat exchanger and a cooling pump connected with the heat exchanger, and the cooling pump and the capacity expansion unit are arranged at two ends of the heat exchanger respectively.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: the denitration piece is including consecutive second flowing back pump and denitration case the other end of denitration case is connected with the denitration liquid and prepares the ware.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: and a regulating part is also arranged between the first outlet and the heat exchanger and comprises an air pressure safety valve and a one-way flow regulating valve which are sequentially connected.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: the first drainage pump is connected with the shell through the drain outlet.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: and a plurality of pressure regulating valves are uniformly arranged on the shell along the circumferential direction of the side wall.
As a flue gas ozone denitration waste liquid treatment system a preferred scheme, wherein: and the shell is provided with a pressure sensor.
The utility model has the advantages that: the utility model discloses a carry out gas-liquid separation in advance, carry out denitration treatment afterwards, can effectively improve concentrated concentration, improve concentrated effect, carry out cyclic utilization to gas after gas-liquid separation handles simultaneously, the liquid water disposal load reduces, reduces denitration equipment volume, and microorganism denitrification facility simple structure has and is showing denitration effect.
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 description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:
FIG. 1 is a schematic view of the overall principle of a flue gas ozone denitration waste liquid treatment system according to a first embodiment of the present invention;
FIG. 2 is a schematic view of the whole and partial cutaway of the structure of the expansion unit of the flue gas ozone denitration waste liquid treatment system according to the first embodiment of the present invention;
FIG. 3 is a schematic view of a system of a flue gas ozone denitration waste liquid treatment system according to a second embodiment of the present invention;
FIG. 4 is a schematic view of the internal structure of a capacity expansion unit of a flue gas ozone denitration waste liquid treatment system according to a second embodiment of the present invention;
FIG. 5 is a schematic view of a system of a flue gas ozone denitration waste liquid treatment system according to a third embodiment of the present invention;
FIG. 6 is an external view of the expansion unit of the system for treating flue gas ozone denitration waste liquid according to the third embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention will be described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, for convenience of illustration, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Example 1
Referring to fig. 1 and 2, for the first embodiment of the present invention, this embodiment provides a flue gas ozone denitration waste liquid treatment system, as shown in fig. 1, a flue gas ozone denitration waste liquid treatment system, which includes: the expansion unit 100 comprises a shell 101 and a gas-liquid separation part 102 arranged inside the shell 101, wherein a first outlet 103 is formed in the top of the shell 101; the denitration unit 200 is connected with the capacity expansion unit 100 and comprises a heat exchange piece 201 and a denitration piece 202 connected with the heat exchange piece 201; and a soil exhaust unit 300 including a fluidized bed 301 connected to a bottom of the flash unit 100, and a first drain pump 302 connected between the housing 101 and the fluidized bed 301.
Specifically, for the flue gas ozone deoxidation waste liquid, it is often necessary to treat nitrate and oxynitride therein to reach the national atmospheric emission standard, and the prior art generally treats the waste liquid by using a reaction liquid, as shown in fig. 2, a capacity expansion unit 100 mainly treats the flue gas ozone denitration waste liquid under reduced pressure, and includes a housing 101, the housing 101 forms a high-temperature and high-pressure closed environment (similar to the internal environment of a capacity expander), a gas-liquid separator 102 is further connected inside the housing 101, the gas-liquid separator 102 mainly separates gas and liquid from the flue gas ozone waste liquid, because the waste liquid is in the closed space formed inside the housing 101 under the high-temperature and high-pressure environment inside the housing 101, the volume of the housing 101 is enlarged, the pressure is reduced, the saturation temperature of the liquid is also correspondingly reduced, and here, after the pressure of the waste liquid under the original pressure is reduced, a part of the heat Q is released and absorbed by the waste liquid to vaporize a part of the waste liquid, and the vaporized steam enters the next process through the first outlet 103 at the top, namely, the denitration unit 200 is used for denitration treatment of flue gas, and the utility model also comprises a denitration unit 200, wherein the denitration unit 200 is connected with the expansion unit 100, the flue gas discharged from the first outlet 103 enters the denitration unit 200, the denitration unit 200 comprises a heat exchange member 201, since the gas discharged from the first outlet 103 has a high temperature, the gas needs to be cooled to a liquid state and then subjected to denitration treatment, the heat exchanger 201 mainly converts the existing state of the gas, that is, cools the gas to a liquid state, the liquid formed after the treatment by the heat exchanger 201 enters the denitration member 202, and the waste liquid treatment liquid in the denitration member 202 treats nitrates and nitrogen oxides to meet the emission standard.
Further, the liquid separated and concentrated by the gas-liquid separating element 102 enters the bottom of the housing 101 due to gravity, and then enters the next process, i.e. the sewage discharging unit 300, and is discharged through the sewage outlet at the bottom of the housing 101, as shown in fig. 3, the concentrated waste liquid enters the fluidized bed 301 in the sewage discharging unit 300, the fluidized bed 301 is a biological fluidized bed, the denitration of the concentrated waste liquid is performed in the biological fluidized bed 301, the denitrifying bacteria in the fluidized bed 301 convert the nitrate into nitrogen gas through the denitrification effect, and discharge the nitrogen gas out of the water body, so as to reduce the concentration of the nitrate in the concentrated waste liquid, so as to achieve the discharge standard, it should be noted that the biological fluidized bed 301 is a device for performing high-efficiency biological treatment by using a filter material full of biological membrane, the surface of carrier particles is attached with a large amount of denitrifying bacteria, and is in a fluidized state, and the, through control of the flow rate, the carrier loaded with denitrifying bacteria in the fluidized bed 301 is in a fluidized state, nitrate in the concentrated waste liquid is in contact reaction with the denitrifying bacteria to generate nitrogen, so that the nitrogen is removed from the waste water, meanwhile, in order to facilitate smooth discharge of the concentrated waste liquid into the fluidized bed 301, a first liquid discharge pump 302 is arranged between the capacity expansion unit 100 and the fluidized bed 301, and the concentrated waste liquid is subjected to denitration treatment.
Example 2
Referring to fig. 3 and 4, a second embodiment of the present invention, which is different from the first embodiment, is: the gas-liquid separation part 102 comprises a lampshade type water inlet part 102a arranged on the inner side wall of the shell 101, a steam-water separator 102b is arranged at the upper part of the lampshade type water inlet part 102a, and the steam-water separator 102b is connected with the first outlet 103 through a drainage pipe 102c to form communication.
Specifically, the lampshade type water inlet part 102a on the inner side wall of the shell 101, the waste liquid uniformly enters the lampshade type water inlet part 102a, the lampshade type water inlet part 102a is provided with a clapboard rotating at a high speed, the waste liquid does tangential motion under the action of the clapboard and is immediately vaporized to finish the transformation of the existing state, a steam-water separator 102b is arranged at the upper part of the lampshade type water inlet piece 102a, the steam-water separator 102b is a shutter type steam-water separator, liquid passing through the steam-water separator 102b is led out through a first outlet 103 to be cooled and denitrated, and it should be noted that, in order to smoothly discharge the gas separated by the steam-water separator 102b through the first outlet 103, a draft tube 102c is also provided between the steam-water separator 102b and the first outlet 103, the gas-liquid separator 102 and the first outlet 103 are communicated by the draft tube 102c, so that the separated gas is smoothly discharged in a predetermined direction and enters the heat exchange member 201.
In addition, heat exchange member 201 links to each other with first export 103, and heat exchange member 201 includes heat exchanger 201a and the cooling pump 201b that links to each other with heat exchanger 201a, and cooling pump 201b and flash cell 100 divide row are at heat exchanger 201a both ends, and denitration piece 202 includes consecutive second flowing back pump 202a and denitration case 202b, is connected with denitration liquid and prepares ware 202c at the other end of denitration case 202 b.
Further, for the gas discharged through the first outlet 103, the existence state thereof needs to be changed, i.e. the gas is changed from the high-temperature gas into the liquid, as shown in the figure, the heat exchanger 201 is connected to the first outlet 103, the heat exchanger 201 includes a heat exchanger 201a and a cooling pump 201b, the cooling pump 201b is arranged at the end of the heat exchanger 201a far away from the expansion unit 100, the cooling pump 201b makes the liquid entering the heat exchanger 201a to be the cold water, at this time, the high-temperature gas discharged from the first outlet 103 and the cold water discharged from the cooling pump 201b are mixed in the heat exchanger 201a, so that the high-temperature gas discharged through the first outlet 103 is cooled into the liquid, and then the cooled liquid enters the denitration member 202 for denitration treatment, the heat exchanger 201a is a hybrid heat exchanger, the throat of the hybrid heat exchanger receives the cooling water sprayed from the cooling pump 201b, receive the steam of first export 103 spun in the inclined hole of hybrid heat exchanger, both intensive mixing, the heat exchange is efficient, and the installation is very simple, and the second positive displacement pump 202a in the denitration piece 202 will extract the row and send to denitration case 202b, sets up and is connected with denitration liquid in the one end of denitration case 202b and prepares ware 202c, and consequently, denitration liquid prepares ware 202c can provide the treatment fluid for the waste liquid of denitration case 202b, guarantees the effect of denitration.
Example 3
Referring to fig. 5 to 6, a third embodiment of the present invention is different from the above embodiments in that: a regulating part 203 is further arranged between the first outlet 103 and the heat exchanger 201a, and comprises an air pressure safety valve 203a and a one-way flow regulating valve 203b which are sequentially connected, a water level regulating valve 104 is arranged on the side wall of the bottom of the shell 101, a sewage draining outlet 105 is arranged at the bottom of the shell 101, a first drainage pump 302 is connected with the shell 101 through the sewage draining outlet 105, a plurality of pressure regulating valves 106 are uniformly arranged on the shell 101 along the circumferential direction of the side wall, and a pressure sensor 107 is arranged on the shell 101.
For the denitration treatment system, because the steam existing in the reaction is high temperature, so that the temperature and pressure in the transmission pipeline are too high, a device is required to be monitored for real-time monitoring, specifically, a regulating part 203 is connected between the first outlet 103 and the heat exchanger 201a for regulating and controlling the pressure, flow direction and other relevant factors of the steam in the pipeline, as shown in fig. 5, the regulating part 203 comprises an air pressure safety valve 203a and a one-way flow regulating valve 203b which are connected in sequence, the air pressure safety valve 203a is used for monitoring and regulating the pressure of the steam in the pipeline, the one-way flow regulating valve 203b is used for controlling the flow rate and flow direction of the steam to prevent the gas from flowing backwards to cause safety hazards, in addition, as the concentrated waste liquid after gas-liquid separation is temporarily stored at the bottom of the shell 101, the water level regulating valve 104 is arranged on the side wall of the shell 101, and the same, as shown in fig. 6, a drain 105 is disposed at the bottom of the housing 101, the level control valve 104 can control the level of the waste liquid in the housing 101, so that the water inlet speed and the concentrated waste liquid discharged through the drain 105 are always in a relatively stable state, the first liquid discharge pump 302 is connected with the housing 101 through the drain 105 at the bottom, so as to smoothly discharge the concentrated waste liquid into the fluidized bed 301, in addition, a plurality of pressure control valves 106 are disposed on the housing 101 along the circumferential direction of the sidewall, so as to adjust the pressure in the housing 101, so as to be suitable for different types (concentrations) of waste liquid, and further meet different use requirements, the pressure sensor 107 disposed on the housing can observe the pressure in the housing 101, i.e., datamation, and is convenient to use.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a flue gas ozone denitration waste liquid processing system which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the expansion unit (100) comprises a shell (101) and a gas-liquid separation piece (102) arranged inside the shell (101), wherein a first outlet (103) is formed in the top of the shell (101);
the denitration unit (200) is connected with the expansion unit (100) and comprises a heat exchange piece (201) and a denitration piece (202) connected with the heat exchange piece (201); and the number of the first and second groups,
the sewage draining unit (300) comprises a fluidized bed (301) connected to the bottom of the expansion unit (100), and a first drainage pump (302) is connected between the shell (101) and the fluidized bed (301).
2. The flue gas ozone denitration waste liquid treatment system of claim 1, characterized in that: the gas-liquid separation piece (102) comprises a lampshade type water inlet piece (102a) arranged on the inner side wall of the shell (101), and a steam-water separator (102b) is arranged at the upper part of the lampshade type water inlet piece (102 a).
3. The flue gas ozone denitration waste liquid treatment system of claim 2, characterized in that: the steam-water separator (102b) is connected with the first outlet (103) through a draft tube (102c) to form communication.
4. The flue gas ozone denitration waste liquid treatment system of claim 2 or 3, characterized in that: the heat exchange piece (201) is connected with the first outlet (103), the heat exchange piece (201) comprises a heat exchanger (201a) and a cooling pump (201b) connected with the heat exchanger (201a), and the cooling pump (201b) and the expansion unit (100) are respectively arranged at two ends of the heat exchanger (201 a).
5. The flue gas ozone denitration waste liquid treatment system of claim 4, characterized in that: the denitration piece (202) comprises a second liquid discharge pump (202a) and a denitration box (202b) which are connected in sequence, and the other end of the denitration box (202b) is connected with a denitration liquid preparation device (202 c).
6. The flue gas ozone denitration waste liquid treatment system of claim 5, characterized in that: and a regulating part (203) is further arranged between the first outlet (103) and the heat exchanger (201a), and comprises an air pressure safety valve (203a) and a one-way flow regulating valve (203b) which are sequentially connected.
7. The flue gas ozone denitration waste liquid treatment system of any one of claims 1 to 3 or 6, characterized in that: the water level control device is characterized in that a water level adjusting valve (104) is arranged on the side wall of the bottom of the shell (101), a sewage draining outlet (105) is formed in the bottom of the shell, and the first drainage pump (302) is connected with the shell (101) through the sewage draining outlet (105).
8. The flue gas ozone denitration waste liquid treatment system of claim 7, characterized in that: and a plurality of pressure regulating valves (106) are uniformly arranged on the shell (101) along the circumferential direction of the side wall.
9. The flue gas ozone denitration waste liquid treatment system of claim 8, characterized in that: a pressure sensor (107) is arranged on the shell (101).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020206522.8U CN212833277U (en) | 2020-02-25 | 2020-02-25 | Flue gas ozone denitration waste liquid treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020206522.8U CN212833277U (en) | 2020-02-25 | 2020-02-25 | Flue gas ozone denitration waste liquid treatment system |
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