Continuous carbonation reactor for nanocalcium carbonate

Abstract

The utility model discloses a continuous carbonation reactor of nano calcium carbonate, include: tower body, monitoring system is installed in the middle part upper end of tower body, and its inductive end extends to the outer wall of tower body, display is connected with monitoring system electricity, induction stick is vertically connected in monitoring system bottom and extends into the inside of tower body, porous reaction tube is horizontally installed in the lower side of the middle part of tower body wall, a plurality of outlet holes are equidistance and are set up in the outer wall of porous reaction tube. The utility model discloses the quantitative design of the axial length of guide plate is greater than the sum of the butt joint pipe and the wall thickness of the pipe orifice, cooperates radial bolt locking structure, and the butt joint deviation of gas pipeline is completely eliminated, makes the uniform microbubble of diameter less than or equal to 1mm after carbon dioxide through the array type outlet hole of porous reaction tube, and the uniformity of bubble distribution improves, simultaneously, the polytetrafluoroethylene bonding sealing structure of sealing washer inlaying in the recess of butt joint pipe realizes the leakage rate less than 0.01% under 0.5MPa pressure, and the service life is prolonged compared with traditional flange sealing.

Description

Technical Field

[0001] This invention belongs to the technical field of nanomaterial preparation equipment, and particularly relates to a continuous carbonization reactor for nano-calcium carbonate. Background Technology

[0002] Nano-calcium carbonate, as an important nanomaterial, has a wide range of applications in many industrial fields such as rubber, plastics, papermaking, coatings, and inks, and its usage is increasing year by year. At present, the "carbonation method" is generally used to prepare nano-calcium carbonate at home and abroad. In this method, the carbonation process of calcium hydroxide and carbon dioxide reaction is crucial.

[0003] Among them, intermittent bubbling carbonation and intermittent stirring carbonation are more commonly used. In these methods, calcium hydroxide slurry with additives such as dispersants and crystal guides is cooled and then passed into a carbonation tower equipped with or without a stirrer. Carbon dioxide gas is then introduced from the bottom of the tower, causing calcium hydroxide and carbon dioxide to react and form calcium carbonate precipitate. Utility Model Content

[0004] This utility model addresses the problems existing in the prior art by proposing the following technical solution:

[0005] The nano-calcium carbonate continuous carbonation reactor includes:

[0006] tower body;

[0007] The monitoring system is installed at the upper middle part of the tower body, and its sensing end extends to the outer wall of the tower body.

[0008] The display is electrically connected to the monitoring system;

[0009] The sensor rod is vertically connected to the bottom of the monitoring system and extends into the tower body;

[0010] The porous reaction tube is installed horizontally on the lower middle part of the inner wall of the tower.

[0011] Several outlet holes are equally spaced on the outer wall of the porous reaction tube;

[0012] The connecting pipe has one end that passes through the side wall of the tower body and connects to the end of the porous reaction tube;

[0013] The discharge pipe is connected to the other end of the connecting pipe through the pipe opening;

[0014] Bolts are used to fasten the pipe joint to the pipe opening.

[0015] As a preferred embodiment of the above technical solution, an annular guide plate is fixed to the outer wall of the pipe opening, and the axial length of the guide plate is greater than the sum of the wall thicknesses of the connecting pipe and the pipe opening.

[0016] As a preferred embodiment of the above technical solution, an annular sealing gasket is provided at the joint between the connecting pipe and the tower body, and the sealing gasket is fixed to the inner wall of the connecting pipe by adhesive bonding.

[0017] As a preferred embodiment of the above technical solution, the bottom of the tower body is provided with:

[0018] A conical base is fixed to the bottom of the tower body; the stirring blades are vertically connected to the top of the base via a central shaft.

[0019] Several balls are rolled and embedded on the outer edge of the stirring blade, and their outer surface rolls and contacts the inner wall of the tower.

[0020] The beneficial effects of this utility model are as follows:

[0021] In this application, by quantitatively designing the axial length of the guide plate to be greater than the sum of the wall thickness of the connecting pipe and the nozzle, and in conjunction with the radial bolt locking structure, the misalignment of the gas pipeline is completely eliminated, so that carbon dioxide forms uniform microbubbles with a diameter ≤1mm after exiting the array of porous reaction tubes, and the uniformity of bubble distribution is improved; at the same time, the polytetrafluoroethylene adhesive sealing structure with the sealing gasket embedded in the groove of the connecting pipe achieves a leakage rate of <0.01% under a pressure of 0.5MPa, which extends the service life of traditional flange seals.

[0022] The layout of the induction rod extending vertically into the reaction liquid layer, combined with the microporous gas distribution, improves the accuracy of carbonation temperature control and reduces the standard deviation of nano-calcium carbonate particle size.

[0023] The zirconia ceramic balls embedded on the outer edge of the stirring blade protrude 2mm from the blade surface and form a 0.3mm gap rolling contact with the inner wall of the tower. This reduces frictional power consumption at a speed of 200rpm, decreases the annual wear of the tower wall, and extends the continuous operating life of the equipment. Combined with the quick-release design of the guide plate and bolts, the replacement efficiency of the porous reaction tube is improved and the maintenance cost is reduced. Attached Figure Description

[0024] Figure 1 The diagram shown is a frontal view of the internal structure of an embodiment of the present invention.

[0025] Figure 2 The embodiments of the present invention shown provide Figure 1 Enlarged structural diagram at point A in the middle.

[0026] Legend:

[0027] 1. Carbonization tower; 2. Monitoring system; 3. Induction rod; 4. Display; 5. Porous reaction tube; 6. Outlet; 7. Sealing gasket; 8. Connecting pipe; 9. Pipe port; 10. Discharge pipe; 11. Guide plate; 12. Bolt; 13. Stirring blade; 14. Base; 15. Ball bearing. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0029] like Figure 1 and Figure 2 As shown in the embodiment of this utility model, the nano-calcium carbonate continuous carbonation reactor includes:

[0030] Tower body 1;

[0031] Monitoring system 2 is installed at the upper middle part of tower body 1, and its sensing end extends to the outer wall of the tower body;

[0032] Display 4 is electrically connected to monitoring system 2;

[0033] The sensing rod 3 is vertically connected to the bottom of the monitoring system 2 and extends into the tower body 1; the housing of the monitoring system 2 is embedded in the upper opening of the middle part of the tower body 1, and the platinum resistance sensing rod 3 connected to its bottom extends vertically below the liquid surface inside the tower. The outer wall wires are connected to the display 4 to display the temperature data in real time.

[0034] The porous reaction tube 5 is horizontally installed on the lower middle part of the inner wall of the tower body 1;

[0035] Several outlet holes 6 are equally spaced on the outer wall of the porous reaction tube 5; an array of outlet holes 6 with a diameter of 0.5 mm are horizontally welded to the outer wall of the porous reaction tube 5 below the middle of the inner wall of the tower body 1.

[0036] The connecting pipe 8 has one end connected to the end of the porous reaction tube 5 through the side wall of the tower body 1; the discharge pipe 10 is connected to the other end of the connecting pipe 8 through the pipe port 9.

[0037] Bolt 12 is used to fasten the pipe 8 and the pipe opening 9 together.

[0038] Its end is connected to the connecting pipe 8 that penetrates the tower wall via a flange, and the end of the connecting pipe 8 is sleeved with the pipe port 9 of the discharge pipe 10.

[0039] An annular guide plate 11 is fixed to the outer wall of the pipe opening 9. The axial length of the guide plate 11 is greater than the sum of the wall thicknesses of the connecting pipe 8 and the pipe opening 9. The outer wall of the pipe opening 9 is integrally formed with a guide plate 11 with an axial length of 15mm. This length is greater than the sum of the wall thicknesses of the connecting pipe 8 (5mm) and the pipe opening (6mm), ensuring that the two are coaxially connected and then locked by a radially penetrating M10 bolt 12.

[0040] An annular sealing gasket 7 is provided at the joint between the connecting pipe 8 and the tower body 1. The sealing gasket 7 is fixed to the inner wall of the connecting pipe 8 by adhesive bonding. The polytetrafluoroethylene sealing gasket 7 is embedded in the joint surface between the connecting pipe 8 and the tower body 1. The sealing gasket 7 is bonded and fixed in the annular groove of the inner wall of the connecting pipe 8 to achieve an airtight seal.

[0041] The bottom of tower body 1 is equipped with:

[0042] A conical base 14 is fixed to the bottom of the inner side of the tower body 1; a stirring blade 13 is vertically connected to the top of the base 14 with its central shaft.

[0043] Several balls 15 are rolled and embedded on the outer edge of the stirring blade 13, and their outer surfaces roll and contact the inner wall of the tower body 1.

[0044] A conical base 14 is welded to the bottom of the tower body 1, and a 316L stainless steel stirring blade 13 is connected to the top of the base via a bearing. Six circular grooves are equidistantly opened on the outer edge of the stirring blade 13. A 12mm diameter zirconia ceramic ball 15 is rolled in each groove. The stirring blade is 10mm thick and the ball protrudes 2mm from the blade surface. When the stirring blade 13 rotates, the outer surface of the ball 15 maintains a 0.3mm gap in rolling contact with the inner wall of the tower body 1.

[0045] Working principle

[0046] After passing through the discharge pipe 10, connecting pipe 8, and porous reaction pipe 5, CO2 gas forms microbubbles from the outlet 6 and reacts with the CaOH2 slurry inside the tower.

[0047] When the stirring blade 13 rotates, the ball bearing 15 rolls along the tower wall to avoid metal friction; the induction rod 3 monitors the carbonization temperature in real time and adjusts the gas flow rate through the display 4.

[0048] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A continuous carbonization reactor for nano-calcium carbonate, characterized in that, include: Tower body(1); The monitoring system (2) is installed at the upper middle part of the tower body (1), and its sensing end extends to the outer wall of the tower body; The display (4) is electrically connected to the monitoring system (2); The sensor rod (3) is vertically connected to the bottom of the monitoring system (2) and extends into the tower body (1); A porous reaction tube (5) is horizontally installed below the middle of the inner wall of the tower body (1); Several outlet holes (6) are equally spaced on the outer wall of the porous reaction tube (5); The connecting pipe (8) has one end connected to the end of the porous reaction tube (5) through the side wall of the tower body (1); The discharge pipe (10) is connected to the other end of the connecting pipe (8) through the pipe port (9); Bolt (12) is used to fasten the pipe (8) and the pipe opening (9).

2. The nano-calcium carbonate continuous carbonation reactor according to claim 1, characterized in that, An annular guide plate (11) is fixed to the outer wall of the pipe opening (9), and the axial length of the guide plate (11) is greater than the sum of the wall thicknesses of the connecting pipe (8) and the pipe opening (9).

3. The nano-calcium carbonate continuous carbonation reactor according to claim 1, characterized in that, An annular sealing gasket (7) is provided at the joint between the connecting pipe (8) and the tower body (1), and the sealing gasket (7) is fixed to the inner wall of the connecting pipe (8) by adhesive bonding.

4. The nano-calcium carbonate continuous carbonation reactor according to claim 1, characterized in that, The bottom of the tower body (1) is provided with: A conical base (14) is fixed to the bottom of the inner side of the tower body (1); a stirring blade (13) is vertically connected to the top of the base (14) with its central shaft. Several balls (15) are rolled and embedded on the outer edge of the stirring blade (13), and their outer surface rolls and contacts the inner wall of the tower body (1).

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