CN218614693U - CO2 phase separation system for multipoint microcrystallization and mineralization of premixed concrete - Google Patents
CO2 phase separation system for multipoint microcrystallization and mineralization of premixed concrete Download PDFInfo
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- CN218614693U CN218614693U CN202222859836.XU CN202222859836U CN218614693U CN 218614693 U CN218614693 U CN 218614693U CN 202222859836 U CN202222859836 U CN 202222859836U CN 218614693 U CN218614693 U CN 218614693U
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Abstract
The utility model relates to a CO for premixed concrete multipoint microcrystallization mineralization 2 The split-phase system comprises a gas-solid two-phase flow carbon dioxide generating device and a wet carbon dioxide generator, wherein the gas-solid two-phase flow carbon dioxide generating device comprises a liquid carbon dioxide storage tank and a piston type metering liquid-transferring tank, the liquid carbon dioxide storage tank is communicated with the piston type metering liquid-transferring tank, and the liquid carbon dioxide storage tank is provided with a pressure gauge, a thermometer and a refrigerating system for refrigerating the interior of the liquid carbon dioxide storage tank; the wet carbon dioxide generator is communicated with the outlet of the piston type metering liquid-moving tankThe material port and the wet carbon dioxide generator are provided with mass flow meters. The utility model is used for pour into gas-solid two-phase flow CO into concrete 2 The concrete has the advantages of strength gain, reduced emission of carbon dioxide gas, good workability, compact vibration and guaranteed quality of engineering construction.
Description
Technical Field
The utility model relates to the technical field of premixed concrete production, in particular to a CO for multipoint microcrystallization mineralization of premixed concrete 2 And (4) a phase separation system.
Background
The premixed concrete is a concrete mixture which is sold by metering and mixing cement, aggregate, water, additives, mineral admixtures and the like according to a certain proportion in a mixing station and is transported to a use place within a specified time by adopting a transport vehicle.
The existing premixed concrete mixer mainly comprises a mixing drum, a feeding and discharging mechanism, a water supply system, a prime motor, a transmission mechanism, a frame, a supporting device and the like, and has the main function of mixing and stirring cement, gravel aggregate and water into a concrete mixture. The current production of concrete, especially the calcination of cement, produces about 5.6% of the global CO 2 How to well reduce the emission of carbon dioxide in the concrete industry under the background of double carbon targets in China becomes a problem which needs to be solved urgently. Sean Monkman and the like propose that the compression strength of a product can be effectively improved and the workability and durability of the product can not be negatively influenced by injecting gas-solid two-phase flow carbon dioxide into premixed concrete in the stirring process, so that the consumption of cement in the concrete is expected to be reduced, and the effects of emission reduction of carbon dioxide and permanent sealing of waste carbon dioxide from the source are achieved.
However, the existing premixed concrete mixing system cannot realize the multipoint microcrystallization reaction process of the gas-solid two-phase flow carbon dioxide and the concrete, and the flowing performance of the gas-solid two-phase flow carbon dioxide is influenced in the microcrystallization reaction process of the gas-solid two-phase flow carbon dioxide and the premixed concrete, so that the mixing is difficult, and the difficulty in manufacturing the concrete is caused.
Chinese patent CN211306834U discloses a concrete mixing plant for absorbing solidified carbon dioxide greenhouse gas. The concrete mixing plant weighs the grit and carries it to the stirring host computer through the grit and weighs and conveyor, weighs and conveyor weighs the powder and carry to the stirring host computer through the powder, weighs and conveyor weighs water and liquid admixture and carry to the stirring host computer through the liquid, stirs the material in it through the stirring host computer and is the mixture, carries aerating device to sneak into carbon dioxide in the mixture through the finished product and forms the concrete that has sealed up and deposited carbon dioxide. The device directly adopts carbon dioxide gas to inject and stir, the carbon dioxide treatment capacity is not large, gas is easy to escape, the reaction efficiency of gaseous carbon dioxide and concrete is low, and the strength gain of the obtained concrete is not obvious.
Compared with common premixed concrete, the premixed concrete added with carbon dioxide has the condition of poor flowability, and the poor flowability of the premixed concrete can cause the uneven quality of the concrete, thereby causing the poor workability of the concrete, causing the non-compaction of vibration and influencing the quality of engineering constructions. Therefore, it is needed to design a system for injecting carbon dioxide in a gas-solid two-phase flow, which can ensure a certain fluidity and pumpability of premixed concrete while performing a microcrystallization reaction on the premixed concrete, and can prepare the carbon dioxide in the gas-solid two-phase flow and accurately measure the flow rate of the carbon dioxide.
SUMMERY OF THE UTILITY MODEL
The utility model provides a CO for premixed concrete multipoint micritization mineralization 2 A phase splitting system to solve the problem that the concrete mixing technology and system in the prior art are difficult to realize the injection of gas-solid two-phase flow CO into concrete 2 So that the multi-point micro-crystallization reaction and micro-crystallization affect the flow performance of the concrete.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model relates to a multipoint micritization mineralization system of premixed concrete, which comprises a gas-solid two-phase flow carbon dioxide generating device and a wet carbon dioxide generator, wherein the gas-solid two-phase flow carbon dioxide generating device comprises a liquid carbon dioxide storage tank and a piston type metering liquid-moving tank, the liquid carbon dioxide storage tank is communicated with the piston type metering liquid-moving tank, and the liquid carbon dioxide storage tank is provided with a pressure gauge, a thermometer and a refrigerating system for refrigerating the interior of the liquid carbon dioxide storage tank; the wet carbon dioxide generator is communicated with a discharge hole of the piston type metering liquid-moving tank, and a mass flowmeter is arranged on the wet carbon dioxide generator.
Preferably, a high-pressure metering pump is arranged on the piston type metering liquid-transferring tank, and a throttle valve is arranged at a discharge port of the piston type metering liquid-transferring tank.
Preferably, the liquid carbon dioxide storage tank is provided with a heat preservation layer, and the liquid carbon dioxide storage tank is communicated with the metering liquid-moving tank through a heat preservation pipeline.
Preferably, the wet carbon dioxide generator is connected with an emptying valve through a heat insulation pipeline.
Preferably, the capacity of the liquid carbon dioxide storage tank is 15L, the liquid carbon dioxide storage tank is provided with a high-pressure regulating valve, and the liquid carbon dioxide storage tank with the pressure resistance of 2-10 Mpa is preferably adopted; the refrigerating temperature range of the refrigerating system is preferably-50 to-20 ℃, and the refrigerant can be one of R404a, R502 and R22; the liquid carbon dioxide storage tank has a heat preservation effect, and a heat preservation material on the liquid carbon dioxide storage tank can be one of rigid polyurethane, aerogel or a vacuum heat insulation plate;
the volume of the piston type metering liquid-moving tank is 5L, the piston type metering liquid-moving tank is provided with a high-pressure metering pump, a piston and a scale for pressure resistance, and the piston type metering liquid-moving tank with the pressure resistance of 2-10 Mpa is preferably adopted;
the wet carbon dioxide generator has a volume of 500mL, is provided with a nozzle and an emptying valve, and has a nozzle aperture of 5mm.
Adopt the utility model relates to a technical scheme compares with prior art, has following beneficial effect:
1. the utility model provides a CO for premixed concrete multipoint micritization mineralization 2 A phase splitting system, which adopts a gas-solid two-phase flow carbon dioxide generating system to inject gas-solid two-phase flow CO into concrete 2 The two components generate multi-point microcrystallization reaction, so that the concrete obtains strength gain and reduces the emission of carbon dioxide gas, and the growth of the concrete is improvedThe production quality, the reduction of the production cost of the concrete and the energy conservation and emission reduction have great significance;
2. the utility model discloses the well system has adopted wet carbon dioxide generator to let in the mode of wet carbon dioxide in to the concrete, replaces partial gas-solid two-phase flow carbon dioxide through a part of carbon dioxide gas that carries vapor, guarantees the mobility and the pumpability of premixed concrete and brings the intensity gain, has also guaranteed even, normal stirring of concrete when making the concrete micritization process go on smoothly, makes the concrete workability good, and the vibrations are closely knit, have guaranteed the quality of engineering structure;
3. the utility model comprises the preparation of gas-solid two-phase flow CO 2 Liquid CO 2 The equipment with pressure conveying, metering and other aspects can accurately and quantitatively obtain the CO of the composite phase participating in the microcrystallization reaction 2 The metering problem of gas-solid two-phase flow is solved;
4. the utility model discloses adopted piston measurement to move the fluid reservoir in the system, piston measurement moves the fluid reservoir and can avoid taking the pressure liquid carbon dioxide to lead to CO because of pressure variation in the in-process that shifts and pour into 2 And precipitation is caused.
Drawings
FIG. 1 is a schematic diagram of the multi-point microcrystallization mineralization system of the ready-mixed concrete of the present invention.
In the figure: 1. the device comprises a liquid carbon dioxide storage tank, 2, a pressure gauge, 3, a thermometer, 4, a heat preservation pipeline, 5, a first valve, 6, a piston type metering liquid-moving tank, 7, a second valve, 8, a throttle valve, 9, a wet carbon dioxide generator, 10 and an emptying valve.
Detailed Description
For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.
Referring to FIG. 1, the present invention relates to a method for multi-point microcrystallization and mineralization of CO in premixed concrete 2 A phase splitting system which comprises a gas-solid two-phase flow carbon dioxide generator and a wet carbon dioxide generator 9, whereinThe gas-solid two-phase flow carbon dioxide generating device comprises a liquid carbon dioxide storage tank 1 and a piston type metering liquid-moving tank 6, wherein the liquid carbon dioxide storage tank 1 is communicated with the piston type metering liquid-moving tank 6, and the liquid carbon dioxide storage tank 1 is provided with a pressure gauge 2, a thermometer 3 and a refrigerating system for refrigerating the interior of the liquid carbon dioxide storage tank 1. The wet carbon dioxide generator 9 is communicated with a discharge hole of the piston type metering liquid-moving tank 6, a mass flowmeter is arranged on the wet carbon dioxide generator 9, and the wet carbon dioxide generator 9 is communicated with an emptying valve 10. The piston type metering liquid-moving tank 6 in the embodiment is used for pressure maintaining transfer and flow rate control of carbon dioxide, a high-pressure metering pump is arranged on the piston type metering liquid-moving tank 6, and a throttling valve 8 is arranged at a discharge port of the piston type metering liquid-moving tank 6. The liquid carbon dioxide storage tank is provided with a heat preservation layer. The liquid carbon dioxide storage tank and the piston type metering liquid-moving tank are communicated through a heat-insulating pipeline 4. In the embodiment, a first valve 4 is arranged on a heat insulation pipeline between the liquid carbon dioxide storage tank 1 and the piston type metering liquid-moving tank 6, and a second valve 7 is arranged between the throttle valve 8 and the piston type metering liquid-moving tank 6.
Wherein:
the volume of the liquid carbon dioxide storage tank is 15L, the pressure resistance is 2-10 Mpa, and the liquid carbon dioxide storage tank is provided with a high-pressure regulating valve; the refrigerating temperature range of the refrigerating system is-50 to-20 ℃, and R404a, R502, R22 and the like are selected as refrigerants; the liquid carbon dioxide storage tank has a heat preservation effect, and heat preservation materials on the liquid carbon dioxide storage tank are hard polyurethane, aerogel, vacuum heat insulation plates and the like;
the piston type metering liquid-moving tank has the volume of 5L, the pressure resistance of 2-10 Mpa, and is provided with a high-pressure metering pump, a piston and a scale;
the wet carbon dioxide generator has a volume of 500mL, is provided with a nozzle and an emptying valve, and has a nozzle aperture of 5mm.
The method for carrying out multipoint microcrystallization mineralization on concrete by adopting the system in the embodiment specifically comprises the following steps:
(1) Adjusting a refrigeration system on a liquid carbon dioxide storage tank 1, observing a pressure gauge 2 and a thermometer 3 on the liquid carbon dioxide storage tank 1, and maintaining the pressure of the liquid carbon dioxide in the liquid carbon dioxide storage tank 1 at 1.5-3 Mpa and the temperature at-40 to-20 ℃;
(2) Liquid carbon dioxide flows from the liquid carbon dioxide storage tank 1 to the piston type metering liquid-moving tank 6 through the heat preservation pipeline 4 for metering, the liquid carbon dioxide flows out of the piston type metering liquid-moving tank 6, then is subjected to pressure reduction and phase change to be gas-solid two-phase flow carbon dioxide, and is introduced into the concrete stirrer for stirring;
(3) And (3) allowing the gas-solid two-phase flow carbon dioxide to enter a concrete stirrer to perform multi-point microcrystallization reaction, and introducing wet carbon dioxide into the stirrer at intervals of 30s until the fluidity of the concrete reaches the standard.
When gas-solid two-phase flow carbon dioxide enters a concrete stirrer to perform multipoint microcrystallization reaction for a period of time, the flowability of concrete is deteriorated, the mass of wet carbon dioxide introduced into the stirrer is determined according to the flowing state of the concrete in the stirrer, and the mass ratio of the introduced gas-solid two-phase flow carbon dioxide to the wet carbon dioxide is 70%: 30 percent. The generation mode of the wet carbon dioxide is as follows: adding 300mL of water and excessive dry ice into the wet carbon dioxide generator, closing a nozzle on the wet carbon dioxide generator, opening an emptying valve, closing the emptying valve and opening the nozzle when the wet carbon dioxide is required to be injected into the stirrer, and recording the mass of the wet carbon dioxide through a mass flow meter.
The present invention has been described in detail with reference to the embodiments, but the above description is only for the purpose of describing the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (5)
1. CO for multipoint microcrystallization mineralization of premixed concrete 2 Phase splitting system, its characterized in that: the system comprises a gas-solid two-phase flow carbon dioxide generation system and a wet carbon dioxide generator, wherein the gas-solid two-phase flow carbon dioxide generation system comprises a liquid carbon dioxide storage tank and a piston type metering liquid-transferring tank, the liquid carbon dioxide storage tank is communicated with the piston type metering liquid-transferring tank, a pressure gauge and a thermometer are arranged on the liquid carbon dioxide storage tank, and the liquid carbon dioxide storage tank is provided with a tank body of the liquid carbon dioxide storage tankAn internal refrigeration system; the wet carbon dioxide generator is communicated with a discharge hole of the piston type metering liquid-moving tank, and a mass flowmeter is arranged on the wet carbon dioxide generator.
2. CO for multipoint microcrystallization mineralization of ready-mixed concrete according to claim 1 2 Phase separation system, its characterized in that: the piston type metering liquid-transferring pot is provided with a high-pressure metering pump, and a discharge port of the piston type metering liquid-transferring pot is provided with a throttle valve.
3. CO for multipoint microcrystallization mineralization of ready-mixed concrete according to claim 1 2 Phase separation system, its characterized in that: and the liquid carbon dioxide storage tank is communicated with the metering liquid moving tank through a heat preservation pipeline.
4. CO for multipoint microcrystallization mineralization of ready-mixed concrete according to claim 1 2 Phase splitting system, its characterized in that: the wet carbon dioxide generator is communicated with an emptying valve through a heat insulation pipeline.
5. CO for multipoint microcrystallization mineralization of ready-mixed concrete according to claim 1 2 Phase separation system, its characterized in that:
the liquid carbon dioxide storage tank has a volume of 15L and is provided with a high-pressure regulating valve;
the piston type metering liquid-moving tank has a volume of 5L and is provided with a high-pressure metering pump, a piston and a scale;
the wet carbon dioxide generator has a volume of 500mL, is provided with a nozzle and an emptying valve, and has a nozzle aperture of 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222859836.XU CN218614693U (en) | 2022-10-28 | 2022-10-28 | CO2 phase separation system for multipoint microcrystallization and mineralization of premixed concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222859836.XU CN218614693U (en) | 2022-10-28 | 2022-10-28 | CO2 phase separation system for multipoint microcrystallization and mineralization of premixed concrete |
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| Publication Number | Publication Date |
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| CN218614693U true CN218614693U (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222859836.XU Active CN218614693U (en) | 2022-10-28 | 2022-10-28 | CO2 phase separation system for multipoint microcrystallization and mineralization of premixed concrete |
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| CN (1) | CN218614693U (en) |
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