A concrete carbon dioxide curing device

Abstract

The utility model discloses a kind of carbon dioxide curing devices of concrete, including curing box, the carbon dioxide generator of providing carbon dioxide and the carbon dioxide conveying pipe group for intercommunication curing box and carbon dioxide generator, carbon dioxide generator includes outer bucket, the inside of outer bucket is provided with macadam rest plate, sewage storage tank located below macadam rest plate, dilute hydrochloric acid introduction pipe is set to the top of outer bucket, the input of carbon dioxide conveying pipe group is communicated with the gas holder of being set to carbon dioxide generator output side.The utility model forms continuous shelter by inclined baffle and fender in outer bucket, limit acid-containing liquid drop and splashing liquid in macadam rest plate range, avoid acid mist along wall surface infiltration, simultaneously, all infiltration liquid flows into sewage storage tank by rest plate seepage hole, realize acid liquid instant collection, reduce the corrosion risk of outer bucket and internal support.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of concrete curing technology, and more specifically, to a concrete carbon dioxide curing device. Background Technology

[0002] Concrete is a common building material. Concrete refers to a general term for engineering composite materials in which aggregates are bound together by cementing materials. Usually, the term concrete refers to concrete using cement as cementing material and sand and stone as aggregates. Concrete has the characteristics of abundant raw materials, low price and simple production process, which makes its use increasingly larger and larger. Concrete curing chambers are used for the standard curing of concrete specimens under constant temperature and humidity.

[0003] In existing on-site carbon dioxide generators that utilize an acid-carbonate reaction, dilute hydrochloric acid is typically sprayed onto limestone. However, actual operation has revealed that high-speed droplets impacting the limestone readily form acid mist, which then diffuses towards the outer wall of the outer tank with the airflow. The inner wall of the outer tank is generally made of ordinary carbon steel or low-alloy steel, leading to pitting and stress corrosion after prolonged contact. This causes cracks in the outer tank due to prolonged corrosion, hindering the carbon dioxide curing process for concrete. Therefore, a concrete carbon dioxide curing device to reduce corrosion of the inner wall of the outer tank is designed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a concrete carbon dioxide curing device.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a concrete carbon dioxide curing device, including a curing box, a carbon dioxide generator for providing carbon dioxide, and a carbon dioxide delivery pipe assembly for connecting the curing box and the carbon dioxide generator. The carbon dioxide generator includes an outer barrel, inside which is provided a crushed stone support plate, a wastewater storage tank located below the crushed stone support plate, and a dilute hydrochloric acid inlet pipe located at the top of the outer barrel. The inlet of the carbon dioxide delivery pipe assembly is connected to a gas storage tank located on the output side of the carbon dioxide generator.

[0007] Preferably, a support column is provided between the bottom of the crushed stone shelf and the inner bottom surface of the outer barrel, and an inclined baffle is fixed to the outside of the crushed stone shelf, with the top of the inclined baffle abutting against the inner wall of the outer barrel.

[0008] Preferably, the surface of the gravel shelf is provided with several drainage holes, the size of the sewage storage tank is adapted to the size of the gravel shelf, and the top of the sewage storage tank is designed to be inclined, with its top abutting against the support column.

[0009] Preferably, the dilute hydrochloric acid inlet pipe is connected to a dilute hydrochloric acid storage tank equipped with a delivery pump. The dilute hydrochloric acid inlet pipe is threaded to the top of the outer tank and sealed with a rubber ring. The output end of the dilute hydrochloric acid inlet pipe is connected to a spray pipe, which includes several spray nozzles.

[0010] Preferably, water baffles are provided on both sides of the spray pipe, the top of the water baffles is screwed to the inner top of the outer barrel, and the lower end of the water baffles is located above the gravel support plate.

[0011] Preferably, the outer barrel is provided with a movable barrel door on its outer side via a movable hinge, and the position of the movable barrel door corresponds to the position of the gravel shelf.

[0012] Preferably, the carbon dioxide delivery pipe assembly includes a delivery pipe, an inlet pipe, an exhaust pipe, and an outlet pipe. The inlet end of the delivery pipe is connected to the gas storage tank, and its outlet end is equipped with a tee pipe. The other port of the tee pipe is connected to a control valve. The inlet end of the inlet pipe is connected to the control valve, and its outlet end is connected to the air inlet of the maintenance box.

[0013] Preferably, the exhaust pipe is located below the intake pipe, its input end is connected to the outlet of the maintenance box, the output end of the exhaust pipe is provided with the tee pipe, the outlet of the tee pipe is provided with the discharge pipe, and the control valve is provided.

[0014] Preferably, the control valve is an electric valve or a manual valve, and a pressure relief valve is connected to one side of the discharge pipe.

[0015] Preferably, the inlet of the gas storage tank is connected to the carbon dioxide generator through the outlet pipe, which is located on the outer side near the top of the outer barrel and passes through the outer barrel and the baffle plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention uses inclined baffles and water-blocking plates to form a continuous shield inside the outer barrel, confining acid droplets and splashes within the area of ​​the gravel shelf, preventing acid mist from seeping down the wall. At the same time, all permeate flows into the sewage storage tank through the seepage holes of the shelf, achieving immediate acid collection and reducing the risk of corrosion to the outer barrel and internal support.

[0018] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the planar structure of this utility model;

[0024] Figure 4 This is an enlarged view of part A of the planar structural schematic diagram of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the carbon dioxide generator of this utility model;

[0026] Figure 6 This is an enlarged schematic diagram of part B of the internal structure of the carbon dioxide generator of this utility model.

[0027] In the diagram: 1. Curing box; 11. Support frame; 12. Discharge port; 13. Inlet; 2. Gas storage tank; 3. Carbon dioxide generator; 31. Outer tank; 32. Movable tank door; 33. Crushed stone support plate; 34. Support column; 35. Wastewater storage tank; 36. Dilute hydrochloric acid inlet pipe; 37. Spray pipe; 38. Water baffle; 39. Inclined baffle; 4. Carbon dioxide delivery pipe assembly; 41. Delivery pipe; 42. T-joint; 43. Control valve; 44. Air inlet pipe; 45. Exhaust pipe; 46. Discharge pipe; 47. Outlet pipe. Detailed Implementation

[0028] like Figure 1-6As shown, this utility model provides a concrete carbon dioxide curing device, including a curing box 1, a carbon dioxide generator 3 for providing carbon dioxide, and a carbon dioxide delivery pipe assembly 4 for connecting the curing box 1 and the carbon dioxide generator 3. A support frame 11 is provided on the outside of the curing box 1 to support the curing box 1. A discharge port 12 with a valve is provided at the bottom to discharge the concrete material that has completed carbon fixation. An injection port 13 is provided on the side near the top to inject concrete material. If it is a concrete test block, an openable and closable box door is opened on one side of the curing box 1 to put the concrete test block. The carbon dioxide generator 3 includes an outer barrel 31. Inside the outer barrel 31, there is a crushed stone support plate 33, a sewage storage tank 35 located below the crushed stone support plate 33, and a dilute hydrochloric acid inlet pipe 36 located at the top of the outer barrel 31. The inlet of the carbon dioxide delivery pipe assembly 4 is connected to a gas storage tank 2 located on the output side of the carbon dioxide generator 3.

[0029] Furthermore, in this embodiment, a support column 34 is provided between the bottom of the crushed stone support plate 33 and the inner bottom surface of the outer barrel 31. The support column 34 supports the crushed stone support plate 33 inside the outer barrel 31 to support crushed stone of 10-30mm. An inclined baffle 39 is fixed on the outer side of the crushed stone support plate 33. The top of the inclined baffle 39 abuts against the inner wall of the outer barrel 31. The inclined baffle 39 blocks the crushed stone to prevent it from falling into the outer barrel 31 and can also block the dilute hydrochloric acid sprayed down from above to prevent it from entering the outer barrel 31.

[0030] It should be noted that, considering the sealing performance, a rubber gasket / strip is provided between the inclined baffle 39 and the inner wall of the outer barrel 31, and the angle of the inclined baffle 39 is pre-set according to the distance between the gravel support plate 33 and the inner wall of the outer barrel 31 to ensure that it can achieve the desired effect.

[0031] In this embodiment, the surface of the gravel shelf 33 is provided with several drainage holes. The diameter of the drainage holes is smaller than the diameter of the gravel holes to prevent the gravel from falling. The size of the sewage storage tank 35 is adapted to the size of the gravel shelf 33 to ensure that the water on the gravel shelf 33 can flow into the sewage storage tank 35. The top of the sewage storage tank 35 is designed to be inclined and its top abuts against the support column 34.

[0032] It should be noted that the outermost drainage hole on the gravel shelf 33 must not be located beyond the inner wall of the sewage storage tank 35 to ensure that sewage does not leak into other areas and to reduce corrosion.

[0033] In this embodiment, the dilute hydrochloric acid inlet pipe 36 is connected to a dilute hydrochloric acid storage tank equipped with a delivery pump. The dilute hydrochloric acid in the storage tank is introduced into the dilute hydrochloric acid inlet pipe 36 by the delivery pump, and then sprayed onto the gravel through the spray nozzle of the spray pipe 37. The dilute hydrochloric acid inlet pipe 36 is threaded to the top of the outer tank 31 and is sealed with a rubber ring. The output end of the dilute hydrochloric acid inlet pipe 36 is connected to the spray pipe 37, which includes several spray nozzles.

[0034] In this embodiment, baffles 38 are provided on both sides of the spray pipe 37. The top of the baffles 38 is screwed to the inner top of the outer barrel 31. The lower end of the baffles 38 is located above the gravel support plate 33, and there is a gap between the lower end and the support plate to prevent the lower end of the baffles 38 from contacting the gravel. The baffles 38 are vertically arranged on both sides of the spray pipe 37, and the distance between the lower end and the gravel support plate 33 is 5-10mm to block acid splashing.

[0035] In this embodiment, the outer side of the outer barrel 31 is provided with a movable barrel door 32 via a movable hinge. The position of the movable barrel door 32 corresponds to the position of the gravel shelf 33, ensuring that after the movable barrel door 32 is opened, the gravel on the gravel shelf 33 can be processed and the sewage storage tank 35 can be taken out.

[0036] In this embodiment, the carbon dioxide delivery pipe assembly 4 includes a delivery pipe 41, an inlet pipe 44, an exhaust pipe 45, and an outlet pipe 47. The inlet end of the delivery pipe 41 is connected to the gas storage tank 2, and its outlet end is equipped with a three-way pipe 42. The other port of the three-way pipe 42 is connected to a control valve 43. The inlet end of the inlet pipe 44 is connected to the control valve 43, and its outlet end is connected to the air inlet of the curing box 1. The use of the inlet pipe 44 is controlled by the control valve 43. When the control valve 43 is opened, the carbon dioxide gas in the gas storage tank 2 flows into the three-way pipe 42, and enters the curing box 1 through the control valve 43 and the air inlet, where it undergoes carbon fixation treatment with the concrete aggregate or concrete test block pre-placed in the curing box 1.

[0037] In this embodiment, the exhaust pipe 45 is located below the intake pipe 44, and its input end is connected to the outlet 12 of the curing box 1. The output end of the exhaust pipe 45 is provided with a three-way pipe 42, and the outlet of the three-way pipe 42 is provided with an exhaust pipe 46 and a control valve 43. The gas in the curing box 1 can be controlled to pass through the outlet 12, through the exhaust pipe 46 and the three-way valve, and finally discharged from the exhaust pipe 46.

[0038] It should be noted that a connecting pipe is provided between the three-way pipe 42 of the intake pipe 44 and the exhaust pipe 45, and a separate control valve 43 is provided for control, so that the exhaust pipe 45 can be used as the intake pipe 44 under reasonable conditions, and carbon dioxide can be introduced through the two pipes.

[0039] In this embodiment, the control valve 43 is either an electric valve or a manual valve. The choice between a manual valve and an electric valve depends on the maintenance environment. One side of the discharge pipe 46 is connected to a pressure relief valve. If the pressure is too high, the pressure relief valve on the gas storage tank 2 can reduce the pressure inside the gas storage tank 2. This structure improves the safety of carbon fixation in the equipment.

[0040] In this embodiment, the inlet of the gas storage tank 2 is connected to the carbon dioxide generator 3 through the outlet pipe 47. The outlet pipe 47 is located on the outside near the top of the outer barrel 31 and passes through the outer barrel 31 and the baffle plate 38, so that the dilute hydrochloric acid in the carbon dioxide generator 3 and the carbon dioxide generated by the crushed stone can enter the gas storage tank 2.

[0041] The principle of carbon dioxide production by dilute hydrochloric acid and crushed stone: Calcium carbonate (CaCO3) in crushed stone reacts with dilute hydrochloric acid (HCl) to undergo a double decomposition reaction, producing water-soluble calcium chloride, water, and carbon dioxide gas. The gas escapes upward and is collected, while the calcium chloride solution mixes with unreacted hydrochloric acid to form wastewater, which flows into the wastewater storage tank 35 below through the seepage holes of the shelving plate, achieving gas-liquid separation and equipment corrosion prevention.

[0042] Specifically, the curing process of this concrete carbon dioxide curing device is as follows:

[0043] Open the movable bucket door 32, spread the crushed stone with a particle size of 10-30 mm evenly on the crushed stone shelf 33, close and lock the sealed bucket door, check whether each part can be used normally and whether it is sealed, inject the fresh concrete aggregate or foamed concrete slurry to be carbonized into the curing box 1 through the injection port 13, and then close the injection port 13.

[0044] Start the delivery pump of the dilute hydrochloric acid storage tank, and pump the dilute hydrochloric acid into the spray pipe 37 through the dilute hydrochloric acid inlet pipe 36. The spray nozzles spray the crushed stone evenly downwards. The dilute hydrochloric acid reacts immediately upon contact with the crushed stone (mainly calcium carbonate), continuously producing carbon dioxide gas. The sewage flows into the sewage storage tank 35 through the seepage hole, realizing the separation of acid and gas. The generated carbon dioxide rises and accumulates at the top of the outer tank 31, and enters the gas storage tank 2 for temporary storage through the outlet pipe 47. The pressure gauge displays the pressure inside the tank in real time. If the pressure is too high, the pressure relief valve will automatically open to release the pressure.

[0045] Open the outlet valve of the gas storage tank 2, and carbon dioxide enters the delivery pipe 41. According to the process selection, open the control valve 43 of the air inlet pipe 44 manually or electrically. The gas enters the curing box 1 through the tee, air inlet pipe 44, and air inlet of curing box 1. In the sealed curing box 1, carbon dioxide reacts with alkaline components such as calcium hydroxide and hydrated calcium silicate in the concrete to form calcium carbonate to fill the pores, achieving simultaneous carbon fixation and strength growth. During the carbonization process, the control valve 43 of the exhaust pipe 45 can be opened intermittently to release some waste gas through the exhaust pipe 46 to maintain a suitable air pressure in the box. If necessary, open the connecting pipe valve to allow air to enter the exhaust pipe 45 in reverse, achieving bidirectional rapid inflation (e.g., when the air pressure in the curing box 1 is lower than 0.01 MPa, open the connecting pipe valve to allow air to enter the exhaust pipe 45 in reverse to accelerate carbonization).

[0046] After the predetermined carbonization time is reached, close the inlet and outlet valves 45 in sequence to stop the gas supply, open the pressure relief valve or outlet valve 45 to slowly discharge the residual gas in the chamber to a safe area, open the bottom outlet valve 12, and the carbonized concrete aggregate or slurry will be discharged by its own weight; if test blocks are used, open the chamber door directly to take them out, open the movable bucket door 32, pull out the sewage storage tank 35 to empty the waste liquid and rinse it, replenish or replace the crushed stone to prepare for the next cycle.

[0047] It should be noted that, considering that concrete needs time to react during the carbon fixation process, in order to ensure that the concrete does not solidify, a stirring rod with a motor is installed in curing box 1 to maintain the state of the concrete.

[0048] The components of this utility model, such as the curing box 1, the gas storage tank 2, the carbon dioxide generator 3, the spray pipe 37, and the control valve 43, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0049] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0050] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A concrete carbon dioxide curing device, comprising a curing box (1), a carbon dioxide generator (3) for supplying carbon dioxide, and a carbon dioxide delivery pipe assembly (4) for connecting the curing box (1) and the carbon dioxide generator (3), characterized in that, The carbon dioxide generator (3) includes an outer tank (31), inside which is provided a gravel support plate (33), a wastewater storage tank (35) located below the gravel support plate (33), and a dilute hydrochloric acid inlet pipe (36) located on the top of the outer tank (31). The inlet of the carbon dioxide delivery pipe assembly (4) is connected to the gas storage tank (2) located on the output side of the carbon dioxide generator (3).

2. The concrete carbon dioxide curing device according to claim 1, characterized in that, A support column (34) is provided between the bottom of the crushed stone support plate (33) and the inner bottom surface of the outer barrel (31). An inclined baffle (39) is fixed on the outer side of the crushed stone support plate (33), and the top of the inclined baffle (39) abuts against the inner wall of the outer barrel (31).

3. The concrete carbon dioxide curing device according to claim 2, characterized in that, The surface of the gravel shelf (33) is provided with several drainage holes. The size of the sewage storage tank (35) is adapted to the size of the gravel shelf (33). The top of the sewage storage tank (35) is designed to be inclined and its top abuts against the support column (34).

4. A concrete carbon dioxide curing device according to claim 3, characterized in that, The dilute hydrochloric acid inlet pipe (36) is connected to a dilute hydrochloric acid storage tank with a delivery pump. The dilute hydrochloric acid inlet pipe (36) is threaded to the top of the outer tank (31) and sealed with a rubber ring. The output end of the dilute hydrochloric acid inlet pipe (36) is connected to a spray pipe (37), which includes several spray nozzles.

5. A concrete carbon dioxide curing device according to claim 4, characterized in that, Water baffles (38) are provided on both sides of the spray pipe (37). The top of the water baffles (38) is screwed to the inner top of the outer barrel (31). The lower end of the water baffles (38) is located above the gravel support plate (33).

6. A concrete carbon dioxide curing device according to claim 5, characterized in that, The outer barrel (31) has a movable barrel door (32) on its outer side via a movable hinge, and the position of the movable barrel door (32) corresponds to the position of the gravel shelf (33).

7. A concrete carbon dioxide curing device according to claim 6, characterized in that, The carbon dioxide delivery pipe assembly (4) includes a delivery pipe (41), an inlet pipe (44), an exhaust pipe (45), and an outlet pipe (47). The inlet end of the delivery pipe (41) is connected to the gas storage tank (2), and its outlet end is equipped with a three-way pipe (42). The other port of the three-way pipe (42) is connected to a control valve (43). The inlet end of the inlet pipe (44) is connected to the control valve (43), and its outlet end is connected to the air inlet of the maintenance box (1).

8. A concrete carbon dioxide curing device according to claim 7, characterized in that, The exhaust pipe (45) is located below the air inlet pipe (44), and its input end is connected to the outlet (12) of the maintenance box (1). The output end of the exhaust pipe (45) is provided with the three-way pipe (42), and the outlet of the three-way pipe (42) is provided with the discharge pipe (46) and the control valve (43).

9. A concrete carbon dioxide curing device according to claim 8, characterized in that, The control valve (43) is an electric valve or a manual valve, and a pressure relief valve is connected to one side of the discharge pipe (46).

10. A concrete carbon dioxide curing device according to claim 9, characterized in that, The inlet of the gas storage tank (2) is connected to the carbon dioxide generator (3) through the outlet pipe (47). The outlet pipe (47) is located on the outside near the top of the outer barrel (31) and passes through the outer barrel (31) and the baffle plate (38).

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