Pressure-regulating humidity-controlling constant-temperature carbonization device for active magnesium oxide cement soil

Abstract

The utility model relates to the technical field of carbonization devices, and discloses an active magnesium oxide cement soil pressure-regulating humidity-controlling constant-temperature carbonization device, which comprises a main body assembly, a carbonization pressure cabin, a pressure cabin upper cover, an air inlet pipe and an air outlet pipe, the air inlet pipe is arranged on one side of the carbonization pressure cabin, and the air outlet pipe is arranged on the other side of the carbonization pressure cabin; and the carbonization assembly is arranged in the carbonization pressure cabin and comprises a heating piece, a bearing piece, a sample and a driving piece. The carbonization device disclosed by the utility model has the beneficial effects that a sample can be slowly moved in the carbonization process of the sample by arranging the carbonization assembly, so that the contact position of the sample and the bearing plate is changed, thereby preventing the situation that a certain point of the sample cannot be effectively contacted with carbon dioxide all the time, and further improving the carbonization effect of active magnesium oxide cement soil.

Description

Technical Field

[0001] The utility model relates to the technical field of carbonization devices, in particular to a pressure-regulating, humidity-controlling and constant-temperature carbonization device for reactive magnesium oxide cement soil. Background Technique

[0002] Reactive magnesium oxide is also called light-burned magnesium oxide. The production process requires calcination at 750 °C, which is much lower than the calcination temperature (1450 °C) in the cement production process. The magnesium oxide generated at this temperature has a relatively fast hydration reaction rate, so it is called reactive magnesium oxide. Its price is higher than or equal to that of cement. Existing research has shown that the strength of reactive magnesium oxide cement soil is not high, but its strength will be greatly improved after carbonization, approaching or even exceeding that of traditional Portland cement solidified soil; at the same time, high pressure and high relative humidity can promote the carbonization reaction rate of reactive magnesium oxide cement soil, enabling the carbonization process to be completed within a few hours or even dozens of minutes. The carbonization reaction consumes a large amount of carbon dioxide, producing a significant environmental effect, and at the same time, the strength development and growth are completed in a very short time, which is of great significance for special emergency projects such as disaster relief and rescue.

[0003] When the existing carbonization device conducts high-temperature carbonization on reactive magnesium oxide cement soil, since the contact position between the reactive magnesium oxide cement soil and the supporting plate cannot effectively contact carbon dioxide, the carbonization effect of the reactive magnesium oxide cement soil is poor. Summary of the Utility Model

[0004] Purpose of the utility model: The problem to be solved by the utility model is how to solve the problem that when the existing carbonization device conducts high-temperature carbonization on reactive magnesium oxide cement soil, since the contact position between the reactive magnesium oxide cement soil and the supporting plate cannot effectively contact carbon dioxide, the carbonization effect of the reactive magnesium oxide cement soil is poor.

[0005] Technical solution: A pressure-regulating, humidity-controlling and constant-temperature carbonization device for reactive magnesium oxide cement soil of the utility model includes a main body component, including a carbonization pressure chamber, a pressure chamber upper cover, an air inlet pipe and an air release pipe. The pressure chamber upper cover is hinged to the top of the carbonization pressure chamber. The air inlet pipe is arranged on one side of the carbonization pressure chamber, and the air release pipe is arranged on the other side of the carbonization pressure chamber; and,

[0006] A carbonization component is arranged in the carbonization pressure chamber, including a heating member, a receiving member, a specimen and a driving member. The heating member is located in the carbonization pressure chamber. The receiving member is arranged above the heating member. The specimen is located on the top of the receiving member. The driving member is arranged on the top of the heating member.

[0007] Furthermore, the heating member of the device includes a fixed seat and a heating rod. The fixed seat is fixed to the inner bottom wall of the carbonization pressure chamber, and the heating rod is fixed in the fixed seat.

[0008] Furthermore, the heating element of the device further includes a water tank and a support sleeve. The water tank is arranged above the heating rod, and the support sleeve is fixed on the surface of the water tank.

[0009] Furthermore, the heating element of the device further includes a support rod, a support plate, and a support spring. The support rod is fixed on the inner bottom wall of the carbonization pressure chamber, the support plate is fixed on the surface of the support rod, and two ends of the support spring are respectively fixed on the surface of the support plate and the inner top wall of the support sleeve.

[0010] Furthermore, the receiving part of the device includes a supporting plate, and the supporting plate is fixed inside the carbonization pressure chamber.

[0011] Furthermore, the receiving part of the device further includes a support base and a support roller. The support base is fixed on the top of the supporting plate, and the support roller is rotatably connected inside the support base.

[0012] Furthermore, the receiving part of the device further includes a positioning plate, and the positioning plate is fixed on the top of the supporting plate.

[0013] Furthermore, the driving part of the device includes a support rod and a top rod. The support rod is fixed on the top of the water tank, and the top rod is fixed on the top of the support rod.

[0014] Furthermore, the driving part of the device further includes a connecting block and a push rod. The connecting block is fixed on the top of the top rod, and the push rod is hinged on the surface of the connecting block.

[0015] Furthermore, the driving part of the device further includes a rack and a limiting strip. The rack slides on the surface of the supporting plate, and the limiting strip is fixed on the surface of the supporting plate and is located on one side of the rack.

[0016] Beneficial effects: Compared with the prior art, the remarkable advantages of the present utility model are as follows: By arranging the carbonization assembly, the device can slowly move the specimen during the carbonization process of the specimen, so that the contact position between the specimen and the supporting plate changes, thereby preventing a certain point of the specimen from always failing to effectively contact carbon dioxide, and thus improving the carbonization effect of the reactive magnesium oxide cement soil. Description of the Drawings

[0017] Figure 1 is the structural diagram of the reactive magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device;

[0018] Figure 2 is the partial sectional structural diagram of the reactive magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device;

[0019] Figure 3 is for the reactive magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device Figure 2Partial enlarged view of the structure at location A in [Chinese context];

[0020] Figure 4 For the active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device Figure 2 Partial enlarged view of the structure at location B in [Chinese context];

[0021] Figure 5 Top view structure diagram of the carbonization pressure chamber of the active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device;

[0022] Figure 6 Cross-sectional view structure diagram of the carbonization pressure chamber of the active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device;

[0023] Figure 7 For the active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device Figure 6 Partial enlarged view of the structure at location C in [Chinese context];

[0024] Figure 8 Connection structure diagram of the support base and support rollers of the active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device. Detailed implementation method

[0025] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present utility model. The "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0027] Embodiment 1

[0028] Refer to Figures 1 to 8 , which is the first embodiment of the present utility model. This embodiment provides an active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device. The active magnesium oxide cement soil pressure-regulating, humidity-controlling and constant-temperature carbonization device includes a main body assembly 100 and a carbonization assembly 200. Through the cooperation of the two, the specimen 203 can be slowly moved during the carbonization process of the specimen 203, so that the contact position between the specimen 203 and the supporting plate changes, thereby preventing a certain point of the specimen 203 from always failing to effectively contact with carbon dioxide, and thus improving the carbonization effect of the active magnesium oxide cement soil.

[0029] Specifically, the main body assembly 100 includes a carbonization pressure chamber 101, a pressure chamber upper cover 102, an air inlet pipe 103 and an air release pipe 104. The pressure chamber upper cover 102 is hinged to the top of the carbonization pressure chamber 101. The air inlet pipe 103 is arranged on one side of the carbonization pressure chamber 101, and the air release pipe 104 is arranged on the other side of the carbonization pressure chamber 101.

[0030] The upper cover 102 of the pressure chamber is used to seal the carbonization pressure chamber 101. The intake pipe 103 is used to input carbon dioxide into the carbonization pressure chamber 101. After carbonization is completed, the discharge pipe 104 discharges the high-pressure gas in the carbonization pressure chamber 101.

[0031] The carbonization assembly 200 is arranged inside the carbonization pressure chamber 101 and includes a heating element 201, a receiving member 202, a specimen 203, and a driving member 204. The heating element 201 is located inside the carbonization pressure chamber 101. The receiving member 202 is arranged above the heating element 201. The specimen 203 is located at the top of the receiving member 202. The driving member 204 is arranged at the top of the heating element 201.

[0032] The heating element 201 is used to heat the air inside the carbonization pressure chamber 101. The receiving member 202 is used to receive the specimen 203. The specimen 203 is solidified reactive magnesium oxide cement soil. The driving member 204 is used to drive the receiving member 202 to move, preventing a certain point of the specimen 203 from always failing to effectively contact carbon dioxide.

[0033] Specifically, the heating element 201 includes a fixing base 201a and a heating rod 201b. The fixing base 201a is fixed to the inner bottom wall of the carbonization pressure chamber 101, and the heating rod 201b is fixed inside the fixing base 201a.

[0034] The fixing base 201a is used to fixedly support the heating rod 201b, and the heating rod 201b is used to heat the air inside the carbonization pressure chamber 101.

[0035] Specifically, the heating element 201 further includes a water tank 201c and a support sleeve 201d. The water tank 201c is arranged above the heating rod 201b, and the support sleeve 201d is fixed to the surface of the water tank 201c.

[0036] The water tank 201c is used to store saturated sodium chloride solution, which can maintain the relative humidity inside the carbonization pressure chamber 101. The support sleeve 201d is used to support the water tank 201c.

[0037] Specifically, the heating element 201 further includes a support rod 201e, a support disc 201f, and a support spring 201g. The support rod 201e is fixed to the inner bottom wall of the carbonization pressure chamber 101. The support disc 201f is fixed to the surface of the support rod 201e. Both ends of the support spring 201g are respectively fixed to the surface of the support disc 201f and the inner top wall of the support sleeve 201d.

[0038] The support sleeve 201d slides on the surface of the support rod 201e, the support spring 201g is in a compressed state, and the support disc 201f is used to fixedly support the support spring 201g. Due to the elastic force of the support spring 201g, the support spring 201g can push the support sleeve 201d, so that the support sleeve 201d supports the water tank 201c. When the saturated sodium chloride solution in the water tank 201c is evaporated, the weight of the water tank 201c is reduced. Under the action of the reset elastic force of the support spring 201g, the water tank 201c can be pushed to move upward.

[0039] Embodiment 2

[0040] Refer to Figures 2 to 4 and Figure 8 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0041] Specifically, the receiving member 202 includes a supporting plate 202a, and the supporting plate 202a is fixed inside the carbonization pressure chamber 101.

[0042] A plurality of air holes are formed on the surface of the supporting plate 202a for supporting the receiving member 202, so that the receiving member 202 can support the specimen 203.

[0043] Specifically, the receiving member 202 further includes a support seat 202b and a support roller 202c. The support seat 202b is fixed on the top of the supporting plate 202a, and the support roller 202c is rotatably connected inside the support seat 202b.

[0044] The support seat 202b is used to support the support roller 202c so that the support roller 202c can rotate stably. The support roller 202c is used to support the specimen 203. By driving the support roller 202c to rotate, the specimen 203 can move on the surface of the support roller 202c, so that the contact position between the specimen 203 and the support roller 202c changes, preventing a certain point of the specimen 203 from always failing to effectively contact with carbon dioxide.

[0045] Specifically, the receiving member 202 further includes a positioning plate 202d, and the positioning plate 202d is fixed on the top of the supporting plate 202a.

[0046] The positioning plate 202d is used to position the specimen 203. A plurality of through holes are formed on the surface of the positioning plate 202d, so that carbon dioxide can contact the specimen 203 through the through holes. When the specimen 203 is placed on the top of the support roller 202c, the specimen 203 is located on one side of the positioning plate 202d to perform initial positioning on the specimen 203.

[0047] Embodiment 3

[0048] Refer to Figures 2 to 4 and Figure 8, which is the third embodiment of the utility model, and this embodiment is based on the first two embodiments.

[0049] Specifically, the driving member 204 includes a support rod 204a and a top rod 204b. The support rod 204a is fixed to the top of the water tank 201c, and the top rod 204b is fixed to the top of the support rod 204a.

[0050] When the water tank 201c rises, it can drive the support rod 204a to move upward, so that the support rod 204a drives the top rod 204b to move upward.

[0051] Specifically, the driving member 204 further includes a connecting block 204c and a push rod 204d. The connecting block 204c is fixed to the top of the top rod 204b, and the push rod 204d is hinged to the surface of the connecting block 204c.

[0052] A fixed shell is provided on the surface of the push rod 204d for limiting the push rod 204d. The fixed shell is fixed to the bottom of the supporting plate 202a. Connecting blocks 204c are provided at both ends of the push rod 204d. When the push rod 204b moves upward, the push rod 204d can be pushed by the connecting block 204c.

[0053] Specifically, the driving member 204 further includes a rack 204e and a limiting bar 204f, the rack 204e slides on the surface of the supporting plate 202a, the limiting bar 204f is fixed on the surface of the supporting plate 202a, and the limiting bar 204f is located on one side of the rack 204e.

[0054] There are two limit bars 204f, which are located on both sides of the rack 204e and are used to limit the rack 204e. The other end of the push rod 204d is connected to the rack 204e through the connecting block 204c. The rack 204e and the support roller 202c are engaged. When the push rod 204d moves, it can drive the rack 204e to move, so that the rack 204e drives the support roller 202c to rotate, thereby driving the sample 203 on the top of the support roller 202c to move.

[0055] When using, when making activated magnesium oxide cement soil, step 1, pre-treat the soil samples retrieved on site by drying, crushing and sieving, weigh the required activated magnesium oxide powder, cement and dry soil according to the proposed mass ratio, weigh clean water according to the water-cement ratio, first evenly stir the dry soil, cement and activated magnesium oxide powder in a mixing basin, then slowly pour the weighed water into the uniform mixture, stir with a geotechnical knife during the pouring process to disperse the water in the mixed dry material as much as possible, then wear gloves to mix manually until the mixture is evenly mixed, finally scrape the soil on the basin wall and gloves, fill it into the mold in three layers, vibrate and compact it, demould after pre-curing for 12 hours, and prepare for carbonization.

[0056] Step 2: Add saturated sodium chloride solution to the bottom of the carbonization chamber, then place the sample to be carbonized on the support plate, then close the upper cover of the carbonization chamber, use fasteners to reinforce the sealing performance of the upper cover, check the airtightness of the carbonization chamber, ensure that the pressure is sealed and adjust the pressure to the preset pressure value of 100-400kPa and maintain the output pressure unchanged. At this time, start carbonization of the sample and record the start time of carbonization. Carbonize for 1h, 2h and 3h respectively. After reaching the preset carbonization time, discharge the high-pressure gas through the vent pipe, and open the safety valve after the air pressure stabilizes; then open the fastener to open the upper cover and take out the sample. Since the temperature of the sample is high after carbonization, the sample must be placed in a sealed plastic storage box for 24 hours to stabilize the temperature of the sample. Then, conduct an unconfined compressive strength test and take the average value of the test strength as the result.

[0057] When the temperature in the carbonization pressure chamber 101 rises, the liquid in the water tank 201c is evaporated, and the weight of the water tank 201c is reduced. Under the action of the restoring elastic force of the support spring 201g, the water tank 201c can be pushed to move upward. When the water tank 201c rises, it can drive the support rod 204a to move upward, so that the support rod 204a drives the top rod 204b to move upward. When the top rod 204b moves upward, the push rod 204d can be pushed through the connecting block 204c, so that the push rod 204d pushes the rack 204e through the connecting block 204c, and the rack 204e drives the support roller 202c to rotate, thereby driving the sample 203 on the top of the support roller 202c to move, so that the contact position of the sample 203 and the support roller 202c changes, preventing a certain point of the sample 203 from being unable to effectively contact with carbon dioxide.

Claims

1. An activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device, characterized in that: include, A main body component (100) comprises a carbonization pressure chamber (101), a pressure chamber upper cover (102), an air intake pipe (103) and an air discharge pipe (104), wherein the pressure chamber upper cover (102) is hinged to the top of the carbonization pressure chamber (101), the air intake pipe (103) is arranged on one side of the carbonization pressure chamber (101), and the air discharge pipe (104) is arranged on the other side of the carbonization pressure chamber (101); as well as, The carbonization component (200) is arranged in the carbonization pressure chamber (101), and comprises a heating element (201), a receiving element (202), a sample (203) and a driving element (204); the heating element (201) is located in the carbonization pressure chamber (101), the receiving element (202) is arranged above the heating element (201), the sample (203) is located on the top of the receiving element (202), and the driving element (204) is arranged on the top of the heating element (201).

2. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 1, characterized in that: The heating element (201) comprises a fixing seat (201a) and a heating rod (201b); the fixing seat (201a) is fixed to the inner bottom wall of the carbonization pressure chamber (101); and the heating rod (201b) is fixed inside the fixing seat (201a).

3. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 2, characterized in that: The heating element (201) further comprises a water tank (201c) and a support sleeve (201d); the water tank (201c) is arranged above the heating rod (201b); and the support sleeve (201d) is fixed to the surface of the water tank (201c).

4. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 3, characterized in that: The heating element (201) also includes a support rod (201e), a support plate (201f) and a support spring (201g), wherein the support rod (201e) is fixed to the inner bottom wall of the carbonization pressure chamber (101), the support plate (201f) is fixed to the surface of the support rod (201e), and the two ends of the support spring (201g) are respectively fixed to the surface of the support plate (201f) and the inner top wall of the support sleeve (201d).

5. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 4, characterized in that: The receiving member (202) comprises a supporting plate (202a), and the supporting plate (202a) is fixed in the carbonization pressure chamber (101).

6. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 5, characterized in that: The receiving member (202) further comprises a support seat (202b) and a support roller (202c), wherein the support seat (202b) is fixed to the top of the supporting plate (202a), and the support roller (202c) is rotatably connected to the inside of the support seat (202b).

7. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 6, characterized in that: The receiving member (202) further comprises a positioning plate (202d), and the positioning plate (202d) is fixed on the top of the supporting plate (202a).

8. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 6 or 7, characterized in that: The driving member (204) comprises a support rod (204a) and a top rod (204b), wherein the support rod (204a) is fixed to the top of the water tank (201c), and the top rod (204b) is fixed to the top of the support rod (204a).

9. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 8, characterized in that: The driving member (204) further comprises a connecting block (204c) and a push rod (204d), wherein the connecting block (204c) is fixed to the top of the top rod (204b), and the push rod (204d) is hinged to the surface of the connecting block (204c).

10. The activated magnesium oxide cement soil pressure regulating, humidity controlling and constant temperature carbonization device according to claim 9, characterized in that: The driving member (204) further comprises a rack (204e) and a limit bar (204f), wherein the rack (204e) slides on the surface of the supporting plate (202a), and the limit bar (204f) is fixed on the surface of the supporting plate (202a), and the limit bar (204f) is located on one side of the rack (204e).

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