CN218345252U - Resourceful treatment device and resourceful treatment system - Google Patents
Resourceful treatment device and resourceful treatment system Download PDFInfo
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- CN218345252U CN218345252U CN202222719240.XU CN202222719240U CN218345252U CN 218345252 U CN218345252 U CN 218345252U CN 202222719240 U CN202222719240 U CN 202222719240U CN 218345252 U CN218345252 U CN 218345252U
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Abstract
Resourceful treatment device and resourceful treatment system belong to waste water treatment technical field. The resourceful treatment device comprises a reactor, a combustion chamber and a circulating assembly arranged between the reactor and the combustion chamber. The circulating assembly is used for introducing carbon dioxide generated by the combustion chamber into the reactor. When the resource treatment device provided by the example is used for treating sodium sulfate wastewater, a large amount of carbon dioxide generated when the combustion chamber calcines sodium bicarbonate can be introduced into the reactor again through the circulating assembly to inhibit the decomposition of ammonium bicarbonate in the reactor, so that the carbon emission in the sodium sulfate wastewater treatment process can be reduced, the synthesis rate of intermediate products can be increased, the consumption of raw materials for sodium sulfate resource treatment can be reduced, and the yield and the efficiency of sodium sulfate resource treatment can be increased.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to a resource treatment device and a resource treatment system.
Background
The sodium sulfate wastewater is one of main wastewater produced in the metallurgical industry, particularly, with the rapid development of new energy industry in recent years, the yield of ternary precursors of lithium ion batteries is increased year by year, and a large amount of sodium sulfate high-salt wastewater is produced in a solid-liquid separation section and a flowing water washing section in the production process of the ternary precursors. The content of sodium sulfate in the sodium sulfate high-salinity wastewater is about 20-150g/L, if the sodium sulfate high-salinity wastewater is directly discharged without being treated, resources are wasted, surrounding soil and water bodies are polluted, salinity of the water bodies and the soil is increased, the soil structure is damaged, soil hardening is caused, and plant growth is not facilitated.
Therefore, for the treatment of wastewater containing sodium sulfate, the reasonable resource utilization of industrial waste salt has become an environmental problem which needs to be solved urgently. The existing sodium sulfate wastewater treatment method mainly comprises the following steps: evaporating and crystallizing to prepare anhydrous sodium sulphate, burying, adding lime milk or calcium carbonate to prepare gypsum, and adding ammonium bicarbonate into sodium sulfate wastewater or introducing carbon dioxide and ammonia gas to prepare soda ash.
Among them, the technology of preparing soda ash by using sodium sulfate often has the problems of low raw material utilization rate, low soda ash yield and high carbon emission.
SUMMERY OF THE UTILITY MODEL
Based on the defects, the application provides a recycling treatment device and a recycling treatment system, so as to partially or completely solve the problems of low utilization rate of raw materials and high carbon emission in the preparation of soda ash from sodium sulfate wastewater in the related technology.
The application is realized as follows:
in a first aspect, an example of the present application provides a resource processing apparatus, including:
a reactor; the reactor is provided with a first gas inlet end, a first gas outlet end and a first material outlet end; the first air outlet end is positioned above the first air inlet end and the second air inlet end along the gravity direction;
a circulation component; the circulating assembly comprises a carbon dioxide absorption tower, the air inlet end of the carbon dioxide absorption tower is connected with the air outlet end of the combustion chamber, and the air outlet end of the carbon dioxide absorption tower is connected with the first air inlet end so as to lead carbon dioxide generated by the combustion chamber to the reactor.
In the implementation process, when the resource treatment device provided by the example is used for sodium sulfate wastewater treatment, sodium sulfate wastewater can be reacted with ammonium bicarbonate in the reactor to generate sodium bicarbonate precipitate. And feeding the sodium bicarbonate precipitate into the combustion chamber from the feeding end of the combustion chamber through the first discharging end of the reactor, and calcining the sodium bicarbonate precipitate. During the calcination of sodium bicarbonate in the combustion chamber, a large amount of carbon dioxide is produced. The gas outlet end of the combustion chamber is connected with the gas inlet end of the carbon dioxide absorption tower, so that the gas containing carbon dioxide generated in the combustion chamber can be introduced into the carbon dioxide absorption tower to absorb the carbon dioxide. And then connecting the gas outlet end of the carbon dioxide absorption tower with the first gas inlet end of the reactor, decompressing the carbon dioxide absorbed in the carbon dioxide absorption tower and introducing the decompressed carbon dioxide below the liquid level in the reactor.
Since ammonia bicarbonate used for reaction with sodium sulfate wastewater undergoes a reversible reaction, it is decomposed into carbon dioxide and ammonia gas. The decomposed carbon dioxide and ammonia gas may overflow from the feed channel or the discharge channel of the reactor, resulting in a decrease in the reaction rate of the sodium sulfate wastewater in the reactor. In the embodiment, carbon dioxide generated by the combustion chamber is absorbed by the absorption tower and then is introduced below the liquid level in the reactor again, so that the concentration of the carbon dioxide in the liquid in the reactor can be increased, the decomposition reaction of ammonium bicarbonate is inhibited, the yield of sodium bicarbonate is improved, and the carbon emission is reduced while the yield of sodium carbonate is improved.
With reference to the first aspect, in a first possible implementation manner of the first aspect of the present application, the first gas outlet end and the gas outlet end of the combustion chamber are both connected to the gas inlet end of the carbon dioxide absorption tower.
When the sodium sulfate wastewater is recycled, certain decomposition reaction of ammonium bicarbonate can occur in the reactor to generate carbon dioxide and ammonia gas. Part of the carbon dioxide overflows the liquid level and is discharged from a first gas outlet end on the liquid level of the reactor. In the implementation process, the first gas outlet end and the gas outlet end of the combustion chamber are connected with the gas inlet end of the carbon dioxide absorption tower, so that carbon dioxide overflowing from the reactor and carbon dioxide generated by the combustion chamber can be absorbed simultaneously, carbon emission is further reduced, and the yield of sodium bicarbonate is improved.
With reference to the first aspect, in a second possible embodiment of the first aspect of the present application, the carbon dioxide absorption tower includes a first absorption tower and a second absorption tower; the air inlet end of the first absorption tower is simultaneously connected with the air outlet end and the first air outlet end of the combustion chamber through a first air inlet valve, and the air inlet end of the second absorption tower is simultaneously connected with the air outlet end and the first air outlet end of the combustion chamber through a second air inlet valve; the gas outlet end of the first absorption tower is connected with the first gas inlet end through a first gas outlet valve, and the gas outlet end of the second absorption tower is connected with the first gas inlet end through a second gas outlet valve.
In the implementation process, the first absorption tower and the second absorption tower are arranged in parallel, and the air inlet ends of the first absorption tower and the second absorption tower are connected with the air outlet end of the combustion chamber and the first air outlet end of the combustion chamber through corresponding air inlet valves, so that the mixed gas of carbon dioxide overflowing from the reactor and carbon dioxide generated by the combustion chamber can selectively flow to either one or both of the first absorption tower and the second absorption tower to absorb the carbon dioxide. The gas outlet ends of the first absorption tower and the second absorption tower are simultaneously connected with the first gas inlet end through corresponding gas outlet valves, so that carbon dioxide absorbed by either or both of the first absorption tower and the second absorption tower can be selectively led into the reactor.
The first absorption tower and the second absorption tower are arranged in parallel, so that carbon dioxide can be absorbed by one absorption tower, and simultaneously carbon dioxide absorbed by the other absorption tower is desorbed and introduced into the reactor, so that the absorption and desorption of carbon dioxide can be continuously realized, and the treatment efficiency is improved.
With reference to the first aspect, in a third possible embodiment of the first aspect of the present application, the circulation module further includes a heat exchanger; the heat exchanger is provided with a cold air inlet end and a hot air outlet end which are communicated with each other, and a hot air inlet end and a cold air outlet end which are communicated with each other;
the first air inlet valve and the second air inlet valve are both connected with the cold air outlet end, and the air outlet end and the first air outlet end of the combustion chamber are both connected with the hot air inlet end;
the first absorption tower and the second absorption tower are respectively provided with a first heating cavity and a second heating cavity which contain heating gas to heat the tower body; the hot air outlet end is selectively connected with the first heating cavity and/or the second heating cavity.
In the implementation process, a heat exchanger is arranged at the front end of the first absorption tower and the second absorption tower, the heat exchanger is provided with a cold air inlet end and a hot air outlet end which are communicated with each other, and a hot air inlet end and a cold air outlet end which are communicated with each other, cold air (for example, air at normal temperature or other cold air) can be used for carrying out heat exchange on hot air containing carbon dioxide (gas containing carbon dioxide discharged from a combustion chamber and a reactor) input from the hot air inlet end, and the cooled gas containing carbon dioxide is input into either one or both of the first absorption tower and the second absorption tower for low-temperature absorption.
Hot air after heat exchange with hot gas containing carbon dioxide is selectively introduced into either or both of the first heating cavity and the second heating cavity, and the hot air can be used for heating the corresponding absorption tower so as to carry out high-temperature desorption, so that the desorbed carbon dioxide is input into the reactor.
The heat exchanger is arranged, so that the heat source generated by the combustion chamber and the reactor can be reused.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect of the present application, the circulation component includes a first induced draft fan and a second induced draft fan;
the first heating chamber is connected with the hot gas outlet end through a first induced draft fan, and the second heating chamber is connected with the hot gas outlet end through a second induced draft fan.
In the implementation process, a first induced draft fan is arranged between the first heating cavity and the heat exchanger, a second induced draft fan is arranged between the second heating cavity and the heat exchanger, the switch of the corresponding induced draft fan can be operated to send hot air flowing out of the hot air outlet end of the heat exchanger to the heating cavity connected with the heat exchanger, and the absorption tower provided with the heating cavity is subjected to desorption.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect of the present application, the circulation assembly further includes a third induced draft fan, a fourth induced draft fan, and a fifth induced draft fan;
the air outlet end of the combustion chamber is connected with the hot air inlet end through a third induced draft fan;
the first air outlet end is connected with the hot air inlet end through a fourth induced draft fan;
the first air outlet valve and the second air outlet valve are connected with the first air inlet end through a fifth induced draft fan.
In the implementation process, the front end of the heat exchanger is respectively provided with the third induced draft fan and the fourth induced draft fan which are connected with the combustion chamber and the reactor, the fifth induced draft fan is arranged between the first absorption tower and the first gas inlet end, the speed of the gas containing carbon dioxide discharged from the combustion chamber and the reactor flowing to the heat exchanger can be accelerated, the speed of the cooled gas containing carbon dioxide flowing to the corresponding absorption tower is accelerated, and the efficiency of the resource treatment device is further accelerated.
With reference to the first aspect, in a sixth possible embodiment of the first aspect of the present application, the circulation assembly includes a first gas compressor and a second gas compressor;
the first air inlet valve and the second air inlet valve are connected with the cold air outlet end through a first air compressor;
and the fifth induced draft fan is connected with the first air inlet end through a second air compressor.
In the implementation process, the first gas compression machine is arranged at the front end of the first air inlet valve and the front end of the second air inlet valve, and the gas containing carbon dioxide flowing out of the cold air outlet end of the heat exchanger can be compressed so as to be convenient for absorbing the carbon dioxide at low temperature and high pressure through the first absorption tower and the second absorption tower. And a second gas compressor is arranged between the fifth induced draft fan and the first gas inlet end, so that the carbon dioxide desorbed by the first absorption tower and the second absorption tower under the conditions of high temperature and low pressure can be compressed, and the gas pressure of the carbon dioxide input into the reactor is improved.
With reference to the first aspect, in a seventh possible embodiment of the first aspect of the present application, the second gas compressor is connected to the first gas inlet end through a carbon dioxide gas storage tank.
In the implementation process, a carbon dioxide gas storage tank is arranged between the second gas compressor and the first gas inlet end of the reactor, so that carbon dioxide gas flowing out of the first absorption tower and the second absorption tower can be prestored and collected, and the carbon dioxide gas is conveyed into the reactor according to needs.
With reference to the first aspect, in an eighth possible embodiment of the first aspect of the present application, the circulation assembly further comprises a gas-liquid separator; and the fourth induced draft fan is connected with the hot gas inlet end through a gas-liquid separator.
In the implementation process, the gas-liquid separator is arranged between the fourth induced draft fan and the heat exchanger, so that high-humidity gas introduced from the reactor by the induced draft fan can be subjected to gas-liquid separation, and dry gas containing carbon dioxide is input into the heat exchanger.
In a second aspect, examples of the present application provide a resourceful treatment system comprising:
the resource treatment device provided in the first aspect;
and a water outlet of the wastewater pool is connected with the reactor so as to introduce sodium sulfate wastewater into the reactor.
In the implementation process, the water outlet of the wastewater pool is connected with the reactor in the resource treatment device provided by the first aspect, so that sodium sulfate wastewater in the wastewater pool can be introduced into the reactor to react, and sodium bicarbonate precipitate is obtained. Then the sodium bicarbonate sediment is sent into the combustion chamber from the feed end of the combustion chamber through the first discharge end of the reactor, and the sodium bicarbonate sediment is calcined to obtain the sodium carbonate.
Utilize the resourceful treatment device that the first aspect provided, can send into the liquid level below in the reactor through the circulation subassembly with a large amount of carbon dioxide that calcine the sodium bicarbonate in-process in the combustion chamber, and then can reduce carbon dioxide emission, can also increase the carbon dioxide concentration of liquid department in the reactor in order to restrain ammonium bicarbonate's decomposition reaction, improve the yield of sodium bicarbonate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the prior art of the present application, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic view of a first recycling apparatus provided in the present application;
FIG. 2 is a schematic view of a second recycling apparatus provided in the examples of the present application;
FIG. 3 is a schematic view of a third recycling apparatus provided in the present application;
FIG. 4 is a schematic view of a fourth recycling apparatus provided in the examples of the present application;
FIG. 5 is a schematic view of a fifth recycling apparatus provided in the examples of the present application;
FIG. 6 is a schematic view of a sixth recycling apparatus according to an exemplary embodiment of the present disclosure;
FIG. 7 is a schematic view of a reclamation system provided by examples of the present application.
An icon: 1-a resource treatment system; 10-a resource treatment device; 11-a reactor; 111-a first air intake end; 112-a first outlet end; 113-a first discharge end; 12-a combustion chamber; 121-a carbon dioxide absorbing hood; 13-a circulation assembly; 131-a carbon dioxide absorption tower; 1311-first absorption column; 1312-a second absorption column; 1313-a first heating chamber; 1314-a second heating cavity; 1321-a first intake valve; 1322-second intake valve; 1323-a first outlet valve; 1324-a second outlet valve; 134-a heat exchanger; 1341-hot gas inlet end; 1342-cold air outlet end; 1343-cold air intake end; 1344-hot gas outlet end; 1351-first gas compressor; 1352-a second gas compressor; 1361-a first induced draft fan; 1362-a second induced draft fan; 1363-a third induced draft fan; 1364-fourth induced draft fan; 1365-fifth induced draft fan; 137-a gas-liquid separator; 138-a carbon dioxide gas holder; 20-wastewater pool.
Detailed Description
Embodiments of the present application will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer.
The following is a detailed description of the recycling apparatus and the recycling system according to the present exemplary embodiment:
with the rapid development of new energy industry in recent years, the problem of treatment of industrial sodium sulfate wastewater is urgently needed to be solved. During the preparation of lithium ion batteries, a large amount of sodium sulfate-rich wastewater with a sodium sulfate content of about 20 to 150g/L is produced. If the sodium sulfate high-salt wastewater is directly discharged without being treated, resources are wasted, soil and water bodies around a discharge area are polluted, salinity of the water bodies and the soil is increased, a soil structure is damaged, soil hardening is further caused, and plant growth is not facilitated.
The existing sodium sulfate wastewater treatment method mainly comprises the following steps: evaporating to crystallize to prepare anhydrous sodium sulfate, burying, adding lime milk or calcium carbonate to prepare gypsum, and adding ammonium bicarbonate or introducing carbon dioxide and ammonia gas to prepare soda ash in the sodium sulfate wastewater. In the technology of preparing soda ash from sodium sulfate, sodium sulfate and ammonium bicarbonate or carbon dioxide and ammonia gas are often adopted to prepare soda ash and a nitrogen fertilizer, so as to realize the recycling of sodium sulfate. The specific reaction process is as follows:
2NH 4 HCO 3 +Na 2 SO 4 →2NaHCO 3 ↓+(NH 4 ) 2 SO 4
2NaHCO 3 →Na 2 CO 3 ↓+H 2 O+CO 2 ↑
however, the inventors have found that when sodium sulfate wastewater is treated to produce soda ash by using a conventional apparatus, there are problems of low raw material utilization rate and low soda ash yield. In addition, when sodium carbonate is obtained by calcining sodium bicarbonate, a large amount of carbon dioxide is generated in the calcining process, and the direct emission causes environmental pollution.
In view of this, the present inventors provide a recycling system 1 and a recycling apparatus 10. The resourceful treatment system 1 includes a resourceful treatment apparatus 10. Referring to fig. 1, the recycling apparatus 10 includes:
a reactor 11; the reactor 11 has a first inlet end 111, a first outlet end 112 and a first outlet end 113, and the first outlet end 112 is located above the first inlet end 111 and the first outlet end 113 along the gravity direction.
A combustion chamber 12; the first discharge end 113 is connected with the feed end of the combustion chamber 12 for conveying the sediments;
a circulating assembly 13; the circulation module 13 includes a carbon dioxide absorption tower 131, an inlet end of the carbon dioxide absorption tower 131 is connected to an outlet end of the combustion chamber 12, and an outlet end of the carbon dioxide absorption tower 131 is connected to the first inlet end 111 to pass carbon dioxide generated from the combustion chamber 12 to the reactor 11.
The first gas inlet end 111 is used for conveying gas below the liquid level in the reactor 11, the first gas outlet end 112 is used for discharging gas above the liquid level in the reactor 11, and the first discharge end 113 is used for discharging sediment in the reactor 11.
The circulating assembly 13 is arranged between the reactor 11 and the combustion chamber 12, so that a large amount of carbon dioxide generated after combustion reaction can be introduced into the reactor 11 again through the circulating assembly 13, carbon emission in the sodium sulfate wastewater treatment process can be reduced, the synthesis rate of an intermediate product sodium bicarbonate can be increased, the consumption of raw materials for sodium sulfate recycling treatment can be reduced, and the yield and efficiency of sodium sulfate recycling treatment can be improved.
The reactor 11, the combustion chamber 12 and the circulation assembly 13 in the resource treatment device 10 provided by way of example in the present application will be described in further detail below with reference to the accompanying drawings.
In the case of sodium sulfate wastewater treatment, the reactor 11 provides a reaction site for the reaction between sodium sulfate wastewater and ammonium bicarbonate.
When the sodium sulfate wastewater is treated by the recycling apparatus 10 of this example, the sodium sulfate wastewater and ammonium bicarbonate may be introduced into the reactor 11. In the reactor 11, the following reaction takes place:
2NH 4 HCO 3 +Na 2 SO 4 →2NaHCO 3 ↓+(NH 4 ) 2 SO 4
the reactor 11 is provided with a first discharge end 113 for discharging sodium bicarbonate precipitate in order to send the intermediate sodium bicarbonate precipitate to the combustion chamber 12 for calcination.
Further, a filter screen or a filter may be disposed at the first discharge end 113 of the reactor 11 to filter the precipitate generated in the reactor 11.
Further, the present application does not limit how the solid reactant in the reactor 11 is transported from the first discharge end 113 to the combustion chamber 12, and in some possible embodiments, a conveyor belt may be disposed below the first discharge end 113, so that the solid precipitate falls from the first discharge end 113 onto the conveyor belt below, and then is transported by the conveyor belt to the combustion chamber 12. Alternatively, a material receiving box may be disposed below the first discharging end 113, and the solid reactant in the reactor 11 is collected, and then the material receiving box is transported to the combustion chamber 12 by a transportation device such as a running trolley, and the solid reactant in the material receiving box is poured into the combustion chamber 12.
In the reactor 11, the ammonium bicarbonate is decomposed to a greater or lesser extent, and therefore, in the example, in order to suppress the decomposition of the ammonium bicarbonate in the reactor 11, a first gas inlet 111 for feeding carbon dioxide gas to a position below the liquid surface of the reactor 11 is further provided in the reactor 11.
The first gas inlet 111 is arranged to increase the carbon dioxide content in the liquid in the reactor 11 by feeding carbon dioxide gas through the circulation assembly 13 below the liquid level in the reactor 11. Because the decomposition reaction of the ammonium bicarbonate is a reversible reaction, when the content of carbon dioxide in a liquid environment is too high, the reversible reaction is pushed to react in the direction of synthesizing the ammonium bicarbonate, the decomposition of the ammonium bicarbonate is inhibited, the synthesis rate and the synthesis rate of the intermediate product sodium bicarbonate are further improved, the yield of sodium sulfate recycling treatment is further improved, and the waste of raw materials is reduced.
Further, the first gas inlet 111 may be disposed at the bottom end of the reactor 11 in the gravity direction, so as to increase the time of the introduced carbon dioxide below the liquid level and reduce the operation amount of the circulation module 13.
Alternatively, referring to fig. 1, a pipe orifice may be disposed at any position on the top end of the reactor 11 or on the liquid surface, a gas pipe is hermetically connected to the pipe orifice, and the tail end of the gas pipe extends to the bottom of the reactor 11. The gas line terminates in a first gas inlet end 111.
In the reactor 11, a more or less limited decomposition of the ammonium bicarbonate takes place, and the decomposed carbon dioxide may overflow the liquid surface and exit the reactor 11 at the relevant outlet or inlet port in the reactor 11. Therefore, in the example, a first gas outlet 112 for discharging gas such as carbon dioxide is further provided at the reactor 11.
The first gas outlet end 112 is arranged at the reactor 11, so that gas such as carbon dioxide is discharged from the first gas outlet end 112, so that the carbon dioxide in the discharged gas can be intensively treated or utilized, and the probability that the carbon dioxide is directly discharged into the air from the pores of the raw material feeding end or the first material discharging end 113 is reduced.
Illustratively, first gas outlet end 112 is located at the top of reactor 11. Further, in order to facilitate discharging the gas containing carbon dioxide from the first gas outlet end 112, an induced draft fan may be disposed at the first gas outlet end 112 to increase the gas fluidity at the first gas outlet end 112, so that most of the gas containing carbon dioxide is discharged from the first gas outlet end 112.
When the sodium sulfate wastewater is subjected to the recycling treatment by the recycling treatment apparatus 10 provided in this example, the combustion chamber 12 is used to calcine the solid reactant generated in the reactor 11 to obtain soda ash.
When the sodium sulfate wastewater is treated by the reclamation treatment apparatus 10 according to this example, the reaction occurring in the combustion chamber 12 includes:
2NaHCO 3 →Na 2 CO 3 ↓+H 2 O+CO 2 ↑
when sodium bicarbonate is calcined in the combustion chamber 12, a large amount of carbon dioxide gas is generated. In the present embodiment, the gas outlet end of the combustion chamber 12 is connected to the circulation module 13, the gas containing carbon dioxide generated by the combustion reaction is treated by the circulation module 13, and the treated carbon dioxide gas is introduced into the reactor 11 through the first gas inlet end 111, so that the carbon emission can be reduced, and the yield of the sodium sulfate wastewater resource treatment can be increased.
Further, with continued reference to fig. 1, in order to increase the collection rate of the carbon dioxide gas generated in the combustion chamber 12, a carbon dioxide absorption hood 121 may be disposed at the combustion chamber 12 to collect the carbon dioxide-containing gas.
Illustratively, the carbon dioxide absorbing cap 121 has a narrow top and a wide bottom, and has an inverted triangular shape, and a duct port or duct connected to the circulation module 13 is provided at the top, and the collected carbon dioxide-containing gas can be sent to the circulation module 13 through the duct.
The circulation module 13 includes a carbon dioxide absorption tower 131, an inlet end of the carbon dioxide absorption tower 131 is connected to an outlet end of the combustion chamber 12, and an outlet end of the carbon dioxide absorption tower 131 is connected to the first inlet end 111 to pass carbon dioxide generated from the combustion chamber 12 to the reactor 11.
Illustratively, the gas outlet end of the combustion chamber 12, the carbon dioxide absorption tower 131 and the first gas inlet end of the reactor 11 are connected by pipes to convey the respective gases.
The carbon dioxide absorption tower 131 serves to absorb carbon dioxide in the carbon dioxide-containing gas and then desorb the absorbed carbon dioxide to output carbon dioxide gas.
The present application does not limit the specific type of the carbon dioxide absorbing tower 131, and the relevant person may make a corresponding selection as necessary. The carbon dioxide absorption tower 131 can absorb CO 2 Absorption into the bulk phase of another material (e.g. CO 2 Molecules dissolved into liquid solution) to achieve CO 2 A method for enriching. The absorption and desorption of the carbon dioxide are realized by utilizing the difference of the solubility of the carbon dioxide in two states of low temperature and high pressure and high temperature and low pressure.
In order to further reduce carbon emission and improve the utilization rate of carbon dioxide, referring to fig. 2, in this example, referring to fig. 2, the first gas outlet 112 of the reactor 11 is connected to the gas inlet of the carbon dioxide absorption tower 131, so that the gas containing carbon dioxide generated by the reactor 11 can be absorbed and desorbed, and returned to the reactor 11 again to inhibit the decomposition of ammonium bicarbonate.
That is, the gas outlet end of the combustion chamber 12 and the first gas outlet end 112 of the reactor 11 are connected to the gas inlet end of the carbon dioxide absorption tower 131 through a pipe.
Further, referring to fig. 3, in this example, the carbon dioxide absorption tower 131 includes a first absorption tower 1311 and a second absorption tower 1312.
The first absorption tower 1311 and the second absorption tower 1312 are arranged in parallel, that is, the air inlet end of the first absorption tower 1311 is simultaneously connected with the air outlet end of the combustion chamber 12 and the first air outlet end 112 of the reactor 11 through a first air inlet valve 1321, so that the carbon dioxide-containing gas generated by the combustion chamber 12 and the reactor 11 can flow into the first absorption tower 1311 through the first air inlet valve 1321; meanwhile, the gas inlet end of the second absorption tower 1312 is also connected to the gas outlet end of the combustion chamber 12 and the first gas outlet end 112 through the second gas inlet valve 1322, so that the carbon dioxide-containing gas generated from the combustion chamber 12 and the reactor 11 can flow into the second absorption tower 1312 through the second gas inlet valve 1322. The gases containing a large amount of carbon dioxide generated from the combustion chamber 12 and the reactor 11 may selectively flow into one or both of the first intake valve 1321 and the second intake valve 1322.
Also, the gas outlet end of the first absorption column 1311 is connected to the first gas inlet end 111 of the reactor 11 through a first gas outlet valve 1323 so that the carbon dioxide gas desorbed by the first absorption column 1311 can flow into the reactor 11 through the first gas outlet valve 1323; meanwhile, the gas outlet end of the second absorption tower 1312 is also connected to the first gas inlet end 111 of the reactor 11 through a second gas outlet valve 1324, so that the carbon dioxide gas generated from the second absorption tower 1312 can also flow into the reactor 11 through the second gas outlet valve 1324. The carbon dioxide gas inputted from the first gas inlet end 111 of the reactor 11 may be selectively discharged from one or both of the first gas outlet valve 1323 and the second gas outlet valve 1324.
For example, when carbon dioxide is absorbed, the second intake valve 1322 of the second absorption tower 1312 may be closed, the first intake valve 1321 of the first absorption tower 1311 may be opened, and the carbon dioxide-containing gas generated in the combustion chamber 12 may be introduced into the first absorption tower 1311 through the first intake valve 1321 to be absorbed; meanwhile, the first gas outlet valve 1323 of the first absorption tower 1311 is closed, and the second gas outlet valve 1324 of the second absorption tower 1312 is opened, so that the carbon dioxide absorbed in the second absorption tower 1312 is desorbed and flows into the reactor 11 through the second gas outlet valve 1324, and the steps are alternately performed.
The first absorption tower 1311 and the second absorption tower 1312 are arranged in parallel, so that carbon dioxide can be absorbed by one absorption tower, and carbon dioxide can be desorbed by the other absorption tower to be introduced into the reactor 11, so that carbon dioxide can be continuously absorbed and desorbed, and the treatment efficiency can be improved.
Further, in order to facilitate high-temperature and low-pressure desorption of carbon dioxide absorbed by the first absorption tower 1311 and the second absorption tower 1312, respectively, a first heating chamber 1313 and a second heating chamber 1314 for containing heating gas to heat the respective absorption towers may be provided at the first absorption tower 1311 and the second absorption tower 1312, respectively. When desorption is needed, high-temperature gas can be introduced into the corresponding heating cavity, and the corresponding absorption tower is heated by the high-temperature gas.
Illustratively, the first heating chamber 1313 is disposed at an outer wall of the first absorption tower 1311, and a heated gas containing area is formed between the inner wall of the first heating chamber 1313 and the outer wall of the first absorption tower 1311. The second heating cavity 1314 is arranged in the same manner as the first heating cavity 1313.
Alternatively, corresponding heating elements may be disposed at the first absorption column 1311 and the second absorption column 1312 to heat the column walls of the absorption columns, so as to achieve desorption of carbon dioxide.
Further, a pressure increasing valve and a pressure reducing valve may be provided at the first absorption tower 1311 and the second absorption tower 1312 to increase and decompress the chamber through which the air flows in the tower body, respectively.
At present, the separation and recovery of carbon dioxide mostly adopt chemical absorption, wherein an absorbent is alkaline solution, has certain corrosivity and can corrode an absorption tower, a regeneration tower and pipelines, so that equipment is required to have certain corrosion resistance, the energy consumption is high, and the investment is large; the general physical absorption method has large absorption capacity and easy regeneration, but has low separation effect and high cost. This example all sets up pressure-increasing valve and relief pressure valve in every absorption tower, can carry out pressure boost or decompression to the cavity in the tower body, changes the solubility of carbon dioxide and in order to carry out corresponding absorption and desorption, can improve the absorption efficiency of carbon dioxide.
Furthermore, the temperature of the tower body can be adjusted, and the solubility change amplitude of the carbon dioxide gas is further increased. For example, cooling tubes are provided in the wall of the tower body to cool the tower body by a cooling liquid or a cooling gas; a heating element is arranged at the body wall of the tower body to heat the tower body.
Alternatively, in order to reduce the energy consumption of the sodium sulfate recycling device in the process of treating the sodium sulfate wastewater, in this example, referring to fig. 4, the circulation assembly 13 further includes a heat exchanger 134.
In the illustrated example, the heat exchanger 134 has a hot gas inlet port 1341 and a cold gas outlet port 1342 in communication with each other, and a cold gas inlet port 1343 and a hot gas outlet port 1344 in communication with each other. The hot air flowing in from the hot air inlet port 1341 exchanges heat with the cold air flowing in from the cold air inlet port 1343 and then flows out from the cold air outlet port 1342.
The gas outlet end of the combustion chamber 12 and the first gas outlet end 112 of the reactor 11 are both connected to the hot gas inlet end 1341, so as to cool the gas containing carbon dioxide, and then the cooled gas outlet end 1342 can selectively flow through either or both of the first gas inlet valve 1321 and the second gas inlet valve 1322, so as to perform low-temperature absorption on the gas containing carbon dioxide.
To further reduce the temperature and increase the pressure of the gas flowing through the first and second inlet valves 1321 and 1322, referring to fig. 6, a first gas compressor 1351 may be disposed between the heat exchanger 134 and the first and second inlet valves 1321 and 1322.
The hot gas outlet port 1344 is optionally connected to the first heating chamber 1313 and the second heating chamber 1314, so that the heat source in the carbon dioxide-containing gas discharged from the combustion chamber 12 and the reactor 11 can be used to heat either or both of the first absorption tower 1311 and the second absorption tower 1312, thereby realizing the desorption of carbon dioxide.
Illustratively, the first air inlet valve 1321 and the second air outlet valve 1324 are opened, the first air outlet valve 1323 and the second air inlet valve 1322 are closed, and the gas containing carbon dioxide flowing out of the cold air outlet end 1342 flows into the first absorption tower 1311 from the first air inlet valve 1321 for absorption; meanwhile, the hot gas flowing out of the hot gas outlet port 1344 flows into the second heating cavity 1314 to desorb the carbon dioxide in the second absorption tower 1312.
Further, referring to fig. 5, the circulating assembly 13 further includes a first induced draft fan 1361 and a second induced draft fan 1362. The first heating chamber 1313 is connected to the hot gas outlet port 1344 through a first induced draft fan 1361, and the second heating chamber 1314 is connected to the hot gas outlet port 1344 through a second induced draft fan 1362.
By selectively opening one or both of the first induced draft fan 1361 and the second induced draft fan 1362, hot gas generated by the heat exchanger 134 is input into the first heating cavity 1313 or the second heating cavity 1314, so that the corresponding adsorption tower can perform high-temperature desorption.
Further, the circulating assembly 13 further includes a third induced draft fan 1363, a fourth induced draft fan 1364 and a fifth induced draft fan 1365; the end of giving vent to anger of combustion chamber 12 is connected with hot gas inlet port 1341 through third draught fan 1363, and the first end of giving vent to anger 112 is connected 1341 through fourth draught fan 1364 and hot gas inlet port, and first air outlet valve 1323 and second air outlet valve 1324 are connected with first air inlet port 111 through fifth draught fan 1365 to increase the speed that the gas flows into or flows out corresponding equipment, improve the efficiency of resourceful treatment device 10.
Further, the circulation module 13 further includes a gas-liquid separator 137; the fourth induced draft fan 1364 is connected to the hot gas inlet end 1341 through the gas-liquid separator 137, and performs gas-liquid separation on the high humidity gas flowing out of the reactor 11.
Further, a second gas compressor 1352 may be disposed between the fifth induced draft fan 1365 and the first gas inlet end 111 to compress the carbon dioxide gas output from the absorption tower, so as to increase the gas pressure and improve the carbon dioxide delivery efficiency.
Further, a carbon dioxide gas storage tank 138 may be disposed between the second gas compressor 1352 and the first gas inlet 111 to store the carbon dioxide desorbed from the absorption tower, so as to input the carbon dioxide gas to the reactor 11 as needed.
Referring to fig. 7, the resource treatment system 1 provided by the example of the present application further includes a wastewater tank 20. The water outlet of the wastewater pool 20 is connected with the reactor 11 so as to feed sodium sulfate wastewater into the reactor 11.
Further, the recycling treatment system 1 further comprises a water generating tank for collecting or recycling water flowing out after the reaction in the reactor 11.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A resource treatment device, characterized by comprising:
a reactor; the reactor is provided with a first gas inlet end, a first gas outlet end and a first gas outlet end; the first air outlet end is positioned above the first air inlet end and the first material outlet end along the gravity direction;
a combustion chamber; the first discharge end is connected with the feed end of the combustion chamber;
a circulation component; the circulating assembly comprises a carbon dioxide absorption tower, wherein the air inlet end of the carbon dioxide absorption tower is connected with the air outlet end of the combustion chamber, and the air outlet end of the carbon dioxide absorption tower is connected with the first air inlet end so as to lead the carbon dioxide generated by the combustion chamber to the reactor.
2. The resourceful treatment device according to claim 1, wherein the first gas outlet end and the gas outlet end of the combustion chamber are both connected to a gas inlet end of the carbon dioxide absorption tower.
3. The resource treatment apparatus according to claim 2, wherein the carbon dioxide absorption tower comprises a first absorption tower and a second absorption tower;
the air inlet end of the first absorption tower is simultaneously connected with the air outlet end of the combustion chamber and the first air outlet end through a first air inlet valve, and the air inlet end of the second absorption tower is simultaneously connected with the air outlet end of the combustion chamber and the first air outlet end through a second air inlet valve;
the air outlet end of the first absorption tower is connected with the first air inlet end through a first air outlet valve, and the air outlet end of the second absorption tower is connected with the first air inlet end through a second air outlet valve.
4. The resourceful treatment apparatus according to claim 3, wherein the circulation module further comprises a heat exchanger; the heat exchanger is provided with a cold air inlet end and a hot air outlet end which are communicated with each other, and a hot air inlet end and a cold air outlet end which are communicated with each other;
the first air inlet valve and the second air inlet valve are both connected with the cold air outlet end, and the air outlet end and the first air outlet end of the combustion chamber are both connected with the hot air inlet end;
the first absorption tower and the second absorption tower are respectively provided with a first heating cavity and a second heating cavity which contain heating gas to heat the tower body; the hot air outlet end is selectively connected with the first heating cavity and/or the second heating cavity.
5. The resourceful treatment device of claim 4, wherein the circulation assembly comprises a first induced draft fan and a second induced draft fan;
first heating chamber passes through first draught fan with steam is given vent to anger the end and is connected, the second heating chamber passes through the second draught fan with steam is given vent to anger the end and is connected.
6. The resource treatment device according to claim 5, wherein the circulation assembly further comprises a third induced draft fan, a fourth induced draft fan and a fifth induced draft fan;
the air outlet end of the combustion chamber is connected with the hot air inlet end through the third induced draft fan;
the first air outlet end is connected with the hot air inlet end through the fourth induced draft fan;
and the first air outlet valve and the second air outlet valve are connected with the first air inlet end through the fifth induced draft fan.
7. The resourceful treatment apparatus according to claim 6, wherein the circulation module comprises a first gas compressor and a second gas compressor; the first air inlet valve and the second air inlet valve are connected with the cold air outlet end through the first air compressor;
and the fifth induced draft fan is connected with the first air inlet end through the second air compressor.
8. The resource treatment device according to claim 7, wherein the second gas compressor is connected to the first gas inlet end through a carbon dioxide gas tank.
9. The resourceful treatment apparatus according to claim 8, wherein the circulation module further comprises a gas-liquid separator; and the fourth induced draft fan is connected with the hot gas inlet end through the gas-liquid separator.
10. A resourceful treatment system characterized by comprising:
the resource treatment apparatus as recited in any one of claims 1 to 9;
and a water outlet of the wastewater pool is connected with the reactor so as to introduce sodium sulfate wastewater into the reactor.
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| CN202222719240.XU CN218345252U (en) | 2022-10-14 | 2022-10-14 | Resourceful treatment device and resourceful treatment system |
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| CN202222719240.XU CN218345252U (en) | 2022-10-14 | 2022-10-14 | Resourceful treatment device and resourceful treatment system |
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