CN218665804U - Equipment for dual curing of steel slag aggregate by using high-temperature carbon dioxide flue gas - Google Patents
Equipment for dual curing of steel slag aggregate by using high-temperature carbon dioxide flue gas Download PDFInfo
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- CN218665804U CN218665804U CN202223488026.4U CN202223488026U CN218665804U CN 218665804 U CN218665804 U CN 218665804U CN 202223488026 U CN202223488026 U CN 202223488026U CN 218665804 U CN218665804 U CN 218665804U
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- carbon dioxide
- flue gas
- temperature carbon
- dioxide flue
- slag aggregate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The utility model relates to an utilize dual maintenance of high temperature carbon dioxide flue gas slag aggregate's equipment, the load simulator comprises a device body, the equipment body on lead to high temperature carbon dioxide flue gas pipeline one and high temperature carbon dioxide flue gas pipeline two, this internal slag aggregate that remains to be handled of placing of equipment, this internal bottom of equipment is equipped with water treatment facilities, high temperature carbon dioxide flue gas pipeline one let in the equipment from the upper cover of equipment body originally internally, in high temperature carbon dioxide flue gas pipeline two let in water treatment facilities from equipment body lower part, be equipped with the upward open-ended steam pipeline one and steam pipeline two of giving vent to anger on the water treatment facilities. The steel slag aggregate is carbonized and maintained and steam maintained in a mode of directly introducing high-temperature carbon dioxide flue gas and introducing the high-temperature carbon dioxide flue gas into water to generate steam, so that the steel slag aggregate with good volume stability is obtained.
Description
Technical Field
The utility model belongs to the technical field of carbonization maintenance and steam curing technique and specifically relates to an utilize dual maintenance of high temperature carbon dioxide flue gas slag aggregate's equipment.
Background
The steel slag aggregate is solid waste generated in the steel making process, and the accumulated discharge amount of the steel slag aggregate reaches 7 hundred million tons in nearly 10 years of China by 2019, but the comprehensive utilization rate is only 20 percent. The continuous production of the steel slag aggregate not only continuously enlarges the storage yard and occupies a large amount of land resources, but also seriously pollutes the environment and the underground water, so the problem of comprehensive utilization of the steel slag aggregate is urgently needed to be solved. The steel slag aggregate contains free calcium oxide and free magnesium oxide (f-CaO and f-MgO), and is easily converted into Ca (OH) in the hydration process 2 And Mg (OH) 2 The steel slag aggregate is partially expanded and even cracked, and the large-scale recycling of the steel slag aggregate is limited. Aiming at the problem of volume stability brought by the steel slag aggregate, some domestic treatment methods such as a hot stewing method, a water quenching method, an aging method and the like also exist. In the above technologies, the hot-braising method has high cost and complex process flow, the water quenching method has high requirement on the fluidity of the steel slag aggregate, the aging method has long time, and the treatment is not thorough. The steel slag aggregate carbonization technology is to place the steel slag aggregate in CO 2 The carbonization is carried out under the conditions of certain temperature, humidity and pressure in the gas environment, and the mineral absorption form can be used for fixed storage, so the steel slag aggregate carbonization technology can not only solidify a large amount of CO 2 And effective utilization of secondary resources can be realized.
At present, the steel slag aggregate carbonization technology is mostly carried out in a carbonization kettle, and CN103347838A mentions a carbonization curing device which can be used for manufacturing carbonized concrete. CN113650143A proposes a reaction device and method for improving stability of steel slag aggregate building material by using flue gas and carbon dioxide, which is used for curing carbon source of steel slag aggregate building material product from high-purity CO 2 Broadening to low concentration industrial CO 2 Flue gas. CN217058406U designs a low temperature carbonization curing device using flue gas waste heat, which meets the requirements of constant temperature carbonization curing process conditions. CN111715146A invented a solid-liquid dual-purpose high-temperature high-pressure carbonization reaction kettle capable of indicating the degree of carbonization, which effectively combines the gas-liquid method carbonization technology and the gas-solid method carbonization technology to accelerate the carbonization rate of the material and simultaneously realize effective regulation and control of the carbonization effect of the reaction material in the kettle. In the technology, the carbonization equipment realizes the carbonization of materials in the kettle, for the steel slag aggregate, different types of steel slag aggregates have different physical properties, high-temperature flue gas containing carbon dioxide is directly introduced to mineralize the steel slag aggregate, and f-CaO and f-MgO in coarse particles and the steel slag aggregate with high compactness are difficult to completely react with the carbon dioxide, so that the requirements on the fineness and the porosity of the steel slag aggregate exist. The steel slag aggregate is carbonized and cured firstly and then is cured by steam, so that f-CaO and f-MgO in the aggregate can be thoroughly eliminated, and the problem of poor volume stability of the steel slag aggregate is solved. Therefore, two sets of equipment may need to be equipped in the research, thereby increasing equipment, site and management investment and causing resource waste.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to overcome the defects in the prior art, the equipment for doubly curing the steel slag aggregate by using the high-temperature carbon dioxide flue gas is provided, and f-CaO and f-MgO in the steel slag aggregate are consolidated by adopting a mode of firstly carbonizing and curing and then curing by steam, so that the factor causing poor volume stability of the steel slag aggregate is eliminated.
The utility model provides a technical scheme that its technical problem adopted is: an apparatus for dual curing steel slag aggregate by using high-temperature carbon dioxide flue gas comprises an apparatus body, wherein a first high-temperature carbon dioxide flue gas pipeline and a second high-temperature carbon dioxide flue gas pipeline are communicated with the apparatus body, steel slag aggregate to be treated is placed in the apparatus body, a water treatment device is arranged at the bottom in the apparatus body,
the first high-temperature carbon dioxide flue gas pipeline is introduced into the equipment body from the upper cover of the equipment body, the second high-temperature carbon dioxide flue gas pipeline is introduced into the water treatment device from the lower part of the equipment body, the water treatment device is provided with a first steam outlet pipeline and a second steam outlet pipeline which are opened upwards,
the steel slag aggregate is laid on the first stainless steel frame and the second stainless steel frame, and the first stainless steel frame and the second stainless steel frame are positioned between the upper cover of the equipment body and the first steam outlet pipeline and the second steam outlet pipeline of the water treatment device.
Furthermore, a high-temperature carbon dioxide flue gas inlet valve I and a high-temperature carbon dioxide flue gas inlet valve II are respectively arranged on the high-temperature carbon dioxide flue gas pipeline I and the high-temperature carbon dioxide flue gas pipeline II,
and a water inlet pipe with a water inlet valve is arranged at one end of the water treatment device far away from the high-temperature carbon dioxide flue gas pipeline II.
Further, the device body is connected with a carbon dioxide concentration detector, a vacuum pump with a reaction kettle air exhaust valve and an automatic temperature and humidity recorder,
the upper cover of the equipment body is connected with a pressure gauge and a gas release port with a gas release valve of the reaction kettle.
Furthermore, the stainless steel frame I and the stainless steel frame II are fixed on the inner wall of the equipment body in sequence.
Furthermore, the same pipeline is adopted before the high-temperature carbon dioxide flue gas pipeline I and the high-temperature carbon dioxide flue gas pipeline II pass through the high-temperature carbon dioxide flue gas inlet valve I and/or the high-temperature carbon dioxide flue gas inlet valve II.
Specifically, the equipment body is made of 316L stainless steel and can bear 3MPa pressure;
the measuring range of the pressure gauge is-0.1-10 MPa, and the precision grade is 0.4 grade;
the measurement range of the carbon dioxide concentration detector is 0-99% vol, and the resolution is 0.01% vol;
the vacuum pump is a rotary vane vacuum pump and can pump vacuum to-0.9 bar;
the temperature measuring range of the automatic temperature and humidity recorder is-20-150 ℃, the resolution is 0.1 ℃, the humidity measuring range is 0-100 RH, and the resolution is 0.1RH.
The utility model has the advantages that: carrying out carbonization curing and steam curing on the steel slag aggregate in sequence by directly introducing high-temperature carbon dioxide flue gas and introducing the high-temperature carbon dioxide flue gas into water to generate steam, so as to obtain the steel slag aggregate with good volume stability; the carbon dioxide is solidified in the steel slag aggregate with lower energy consumption; overcomes the defect of single function of the traditional carbonization kettle or autoclave, can not adopt the technology for eliminating the volume stability of the steel slag aggregate coupled by two modes of carbonization curing and autoclave curing, and provides a high-pressure reaction kettle device integrating carbonization curing and steam curing.
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, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Reference numbers in the figures: 1-high-temperature carbon dioxide flue gas pipeline I, 2-high-temperature carbon dioxide flue gas pipeline II, 3-high-temperature carbon dioxide flue gas inlet valve I, 4-high-temperature carbon dioxide flue gas inlet valve II, 5-pressure gauge, 6-reaction kettle gas discharge valve, 7-carbon dioxide concentration detector, 8-reaction kettle gas suction valve, 9-vacuum pump, 10-steam outlet pipeline I, 11-steam outlet pipeline II, 12-water treatment device, 13-stainless steel frame I, 14-stainless steel frame II, 15-steel slag aggregate, 16-automatic temperature and humidity recorder, 17-water inlet pipe and 18-water inlet valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The equipment for dual curing of the steel slag aggregate by using the high-temperature carbon dioxide flue gas shown in the figure 1 comprises an equipment body, wherein a high-temperature carbon dioxide flue gas pipeline I1 and a high-temperature carbon dioxide flue gas pipeline II 2 are communicated with the equipment body, the steel slag aggregate 15 to be treated is placed in the equipment body, and a water treatment device 12 is arranged at the bottom in the equipment body.
A high-temperature carbon dioxide flue gas pipeline I1 is introduced into the equipment body from the upper cover of the equipment body, a high-temperature carbon dioxide flue gas pipeline II 2 is introduced into a water treatment device 12 from the lower part of the equipment body, a steam outlet pipeline I10 and a steam outlet pipeline II 11 which are opened upwards are arranged on the water treatment device 12,
the steel slag aggregate 15 is laid on the first stainless steel frame 13 and the second stainless steel frame 14, and the first stainless steel frame 13 and the second stainless steel frame 14 are located between the upper cover of the equipment body and the first steam outlet pipeline 10 and the second steam outlet pipeline 11 of the water treatment device 12.
A high-temperature carbon dioxide flue gas inlet valve I3 and a high-temperature carbon dioxide flue gas inlet valve II 4 are respectively arranged on the high-temperature carbon dioxide flue gas pipeline I1 and the high-temperature carbon dioxide flue gas pipeline II 2,
the end of the water treatment device 12 far away from the high-temperature carbon dioxide flue gas pipeline two 2 is provided with a water inlet pipe 17 with a water inlet valve 18. The water treatment device 12 stores a certain amount of tap water inside, and after the high-temperature carbon dioxide flue gas is introduced into water, heat can enter the water due to the action of heat transfer, a large amount of steam is generated and enters the cavity through the first steam outlet pipeline 10 and the second steam outlet pipeline 11, and steam curing is realized.
The equipment body is made of 316L stainless steel and can bear 3MPa pressure; the measuring range of the pressure gauge 5 is-0.1-10 MPa, and the precision grade is 0.4 grade; the measurement range of the carbon dioxide concentration detector 7 is 0 to 99% vol, the resolution is 0.01% vol; the vacuum pump 9 is a rotary vane vacuum pump and can pump vacuum to-0.9 bar; the temperature measuring range of the automatic temperature and humidity recorder 16 is-20 to 150 ℃, the resolution is 0.1 ℃, the humidity measuring range is 0 to 100RH, and the resolution is 0.1RH.
A carbon dioxide concentration detector 7 is connected on the equipment body to form a gas concentration detection device, a vacuum pump 9 with a reaction kettle extraction valve 8 forms a vacuum pumping device to accelerate carbon dioxide flue gas to enter the reaction kettle, an automatic temperature and humidity recorder 16 is used for detecting the temperature and humidity change condition in the reaction kettle during the reaction,
the upper cover of the equipment body is connected with a pressure gauge 5 which is used for detecting the pressure change condition in the reaction kettle during the reaction and a vent port with a vent valve 6 of the reaction kettle.
Furthermore, the stainless steel frame I13 and the stainless steel frame II 14 are fixed on the inner wall of the equipment body in sequence.
The high-temperature carbon dioxide flue gas pipeline I1 and the high-temperature carbon dioxide flue gas pipeline II 2 adopt the same pipeline before passing through the high-temperature carbon dioxide flue gas inlet valve I3 and/or the high-temperature carbon dioxide flue gas inlet valve II 4.
When in work, the concrete implementation steps are as follows:
step 1, crushing steel slag aggregate raw slag to the fineness of 2.36-4.5 mm to obtain steel slag aggregate 15, putting the steel slag aggregate 15 and an automatic temperature and humidity recorder 16 into an equipment body together, screwing down a kettle cover screw, opening a reaction kettle air suction valve 8 connected with a vacuum pump 9, closing a high-temperature carbon dioxide flue gas inlet valve I3, a high-temperature carbon dioxide flue gas inlet valve II 4 and a reaction kettle air discharge valve 6, starting the vacuum pump 9 to suck air in the equipment body, and closing the opened reaction kettle air suction valve 8 and the vacuum pump 9 when the reading of a pressure gauge is-0.85- -0.9bar;
step 2, opening a first high-temperature carbon dioxide flue gas inlet valve 3, allowing the high-temperature carbon dioxide flue gas to enter the equipment body, starting timing after the reading of a pressure gauge 5 reaches a preset pressure value, and keeping the inside of the pipeline normal during the timing so that the carbon dioxide flue gas can be continuously introduced into the equipment body;
step 5, opening a reaction kettle air suction valve 8 connected with a vacuum pump 9, closing a high-temperature carbon dioxide flue gas inlet valve I3, a high-temperature carbon dioxide flue gas inlet valve II 4 and a reaction kettle air discharge valve 6, starting the vacuum pump 9 to suck air in the equipment body, and closing the opened reaction kettle air suction valve 8 and the opened vacuum pump 9 when the reading of a pressure gauge is-0.85 to-0.9 bar;
and 7, from the beginning of timing, finishing steam curing after 1-12 h, then closing the second high-temperature carbon dioxide flue gas inlet valve 4, opening the vent valve 6 of the reaction kettle until the pressure gauge returns to the initial value, and taking out the steel slag aggregate 15 on the stainless steel shelves 13 and 14 to obtain the steel slag aggregate with good volume stability.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides an utilize equipment of dual maintenance slag aggregate of high temperature carbon dioxide flue gas which characterized in that: comprises an equipment body, a high-temperature carbon dioxide flue gas pipeline I (1) and a high-temperature carbon dioxide flue gas pipeline II (2) are communicated with the equipment body, steel slag aggregate (15) to be treated is placed in the equipment body, a water treatment device (12) is arranged at the bottom in the equipment body,
the high-temperature carbon dioxide flue gas pipeline I (1) is introduced into the equipment body from the upper cover of the equipment body, the high-temperature carbon dioxide flue gas pipeline II (2) is introduced into the water treatment device (12) from the lower part of the equipment body, the water treatment device (12) is provided with a steam outlet pipeline I (10) and a steam outlet pipeline II (11) which are opened upwards,
the steel slag aggregate (15) is laid on the first stainless steel frame (13) and the second stainless steel frame (14), and the first stainless steel frame (13) and the second stainless steel frame (14) are located between the upper cover of the equipment body and the first steam outlet pipeline (10) and the second steam outlet pipeline (11) of the water treatment device (12).
2. The apparatus for dual curing of steel slag aggregate using high temperature carbon dioxide flue gas as claimed in claim 1, wherein: a high-temperature carbon dioxide flue gas inlet valve I (3) and a high-temperature carbon dioxide flue gas inlet valve II (4) are respectively arranged on the high-temperature carbon dioxide flue gas pipeline I (1) and the high-temperature carbon dioxide flue gas pipeline II (2),
and a water inlet pipe (17) with a water inlet valve (18) is arranged at one end of the water treatment device (12) far away from the high-temperature carbon dioxide flue gas pipeline II (2).
3. The apparatus for dual curing of steel slag aggregate using high temperature carbon dioxide flue gas as claimed in claim 1, wherein: the device body is connected with a carbon dioxide concentration detector (7), a vacuum pump (9) with a reaction kettle extraction valve (8) and an automatic temperature and humidity recorder (16),
the upper cover of the equipment body is connected with a pressure gauge (5) and an air relief port with an air relief valve (6) of the reaction kettle.
4. The apparatus for dual curing of steel slag aggregate using high temperature carbon dioxide flue gas as claimed in claim 1, wherein: the stainless steel frame I (13) and the stainless steel frame II (14) are sequentially fixed on the inner wall of the equipment body in an up-and-down double-layer mode.
5. The apparatus for dual curing of steel slag aggregate using high temperature carbon dioxide flue gas as claimed in claim 2, wherein: and the same pipeline is adopted before the high-temperature carbon dioxide flue gas pipeline I (1) and the high-temperature carbon dioxide flue gas pipeline II (2) pass through the high-temperature carbon dioxide flue gas inlet valve I (3) and/or the high-temperature carbon dioxide flue gas inlet valve II (4).
6. The apparatus for dual curing of steel slag aggregate using high temperature carbon dioxide flue gas as claimed in claim 3, wherein: the equipment body is made of 316L stainless steel and can bear 3MPa pressure;
the measuring range of the pressure gauge (5) is-0.1-10 MPa, and the precision grade is 0.4 grade;
the measurement range of the carbon dioxide concentration detector (7) is 0-99% vol, and the resolution is 0.01% vol;
the vacuum pump (9) is a rotary vane vacuum pump and can pump vacuum to-0.9 bar;
the temperature measuring range of the automatic temperature and humidity recorder (16) is-20-150 ℃, the resolution is 0.1 ℃, the humidity measuring range is 0-100 RH, and the resolution is 0.1RH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223488026.4U CN218665804U (en) | 2022-12-27 | 2022-12-27 | Equipment for dual curing of steel slag aggregate by using high-temperature carbon dioxide flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223488026.4U CN218665804U (en) | 2022-12-27 | 2022-12-27 | Equipment for dual curing of steel slag aggregate by using high-temperature carbon dioxide flue gas |
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| Publication Number | Publication Date |
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| CN218665804U true CN218665804U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223488026.4U Active CN218665804U (en) | 2022-12-27 | 2022-12-27 | Equipment for dual curing of steel slag aggregate by using high-temperature carbon dioxide flue gas |
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| CN (1) | CN218665804U (en) |
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- 2022-12-27 CN CN202223488026.4U patent/CN218665804U/en active Active
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