Efficient nano calcium carbonate carbonization reaction kettle

Abstract

The utility model discloses an efficient nano calcium carbonate carbonization reaction kettle which comprises a kettle body, the kettle body is vertically arranged, a stirring shaft is arranged in the middle of the kettle body, stirring blades are arranged on the stirring shaft, a plurality of long-strip-shaped spoilers are obliquely arranged along the inner side wall of the kettle body, the faces, away from the kettle body, of the spoilers are the upper surfaces, and the upper surfaces are arranged at certain angles. The spoilers comprise a first spoiler and a second spoiler, the upper end of the upper surface of the first spoiler is closer to the inner side wall of the kettle body, the lower end of the upper surface of the second spoiler is closer to the inner side wall of the kettle body, and the two spoilers are arranged in a staggered manner; a sawtooth cutting disc is arranged at the lower end of the stirring shaft and is provided with a plurality of sawteeth; a plurality of large-diameter air injection branch pipes are arranged below the sawtooth cutting disc, the upper ends of the large-diameter air injection branch pipes are dispersedly arranged corresponding to the sawtooth cutting disc, the lower ends of the large-diameter air injection branch pipes are communicated with a long pipe, and the long pipe is communicated with an air inlet formed in the conical bottom surface of the kettle body. According to the reaction kettle, liquid can alternately roll and boil up and down, and the reaction time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of carbonization equipment, in particular to a high-efficiency nano-calcium carbonate carbonization reactor. Background Art

[0002] At present, limestone is commonly used as raw material to produce nano-calcium carbonate at home and abroad. Calcium oxide and kiln gas containing carbon dioxide are obtained by calcination. The calcium oxide and water are digested in a certain proportion to produce a calcium hydroxide suspension. Then kiln gas is introduced into the suspension to carbonate it to produce calcium carbonate slurry. The slurry is surface modified, dehydrated, dried, and crushed to obtain nano-calcium carbonate products. Among them, carbonization reaction is a common method for chemically preparing calcium carbonate. The completeness of the carbonization reaction and the uniformity of the reaction contact are the main factors affecting the output.

[0003] The existing intermittent bubbling carbonization method generally has the disadvantages of low production efficiency, difficult to control the product crystal form, and uneven particle size distribution. There are many patents for the contact area and time between carbon dioxide gas and calcium hydroxide solution. However, in actual application, the gas-liquid contact time and contact area fluctuate greatly, making it difficult to control the product crystal form and particle size, all of which will affect the yield of nano-calcium carbonate. Our company's Chinese patent CN214299312U discloses an environmentally friendly nano-calcium carbonate carbonation reactor. This reactor also has some problems in actual application, such as frequent blockage of slurry residue in the air inlet pipe gas distribution plate, frequent blockage of the slurry discharge filter screen caused by large crystal agglomerates during slurry discharge, and the length of the reaction treatment time affecting the number of intermittent treatments, resulting in a lack of yield improvement.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Utility Model Content

[0005] The purpose of this utility model is to propose a high-efficiency nano-calcium carbonate carbonization reactor to solve the technical problems existing in the above-mentioned prior art, such as frequent blockage of slurry residue in the air inlet pipe gas distribution plate, frequent blockage of the slurry unloading filter screen caused by large crystal agglomerates during slurry discharge, and the length of the reaction treatment time affecting the number of intermittent treatments.

[0006] To this end, the utility model proposes a high-efficiency nano-calcium carbonate carbonization reactor.

[0007] The utility model has the following technical features:

[0008] The invention relates to a high-efficiency nano-calcium carbonate carbonization reactor, comprising a reactor body, wherein the reactor body is vertically arranged, a stirring shaft is arranged in the middle of the reactor body, a stirring blade is arranged on the stirring shaft, a feed port is arranged on the top of the reactor body, and a plurality of long strip-shaped spoilers are obliquely arranged along the inner side wall of the reactor body, the surface of the spoiler away from the reactor body is the upper surface, and the upper surface is arranged at a certain angle, the spoiler comprises a first spoiler and a second spoiler, the upper end of the upper surface of the first spoiler is closer to the inner side wall of the reactor body, and the lower end of the upper surface of the second spoiler is closer to the inner side wall of the reactor body, and the first spoiler and the second spoiler are staggered; a serrated cutting disk is arranged at the lower end of the stirring shaft, and the serrated cutting disk is provided with a plurality of serrations; a plurality of large-diameter air jet branch pipes are arranged below the serrated cutting disk, the upper ends of the plurality of large-diameter air jet branch pipes are dispersedly arranged corresponding to the positions of the serrated cutting disks, and the lower ends are connected to a long pipe, and the long pipe is connected to an air inlet arranged on the conical bottom surface of the reactor body.

[0009] Optionally, an overflow port is provided at a certain height of the kettle body, and when the liquid in the kettle body is full to the overflow port, the control system is triggered to close the valves at the overflow port and the feed port.

[0010] Optionally, an overflow port is provided at a position at three-quarters of the height of the kettle body, and the position of the overflow port is higher than the highest point of the spoiler.

[0011] Optionally, a water inlet pipe is provided in the reactor near the top thereof, and a plurality of jet nozzles are provided at intervals on the water inlet pipe.

[0012] Optionally, the jet nozzle is a high-pressure rotating jet nozzle.

[0013] Optionally, a residual gas outlet is provided at the top of the kettle body, and the residual gas outlet is communicated with a residual gas collector provided outside the kettle body to collect the residual gas that does not participate in the reaction.

[0014] Optionally, a cyclone separator is arranged near the residual gas collector to separate the residual gas cleanly, a residual gas inlet is arranged at the bottom of the kettle body, and a residual gas screw draft fan connected to the residual gas inlet is arranged outside the kettle body. Under the action of the residual gas screw draft fan, the clean gas separated by the cyclone separator is passed into the kettle body through the residual gas inlet.

[0015] Optionally, a plurality of stirring blades are stacked on the stirring shaft.

[0016] The beneficial effects of the present invention compared with the prior art include:

[0017] 1. The reactor of the utility model is tilted and provided with a long strip spoiler with a certain angle. The first spoiler and the second spoiler of different angles are staggered, so that the liquid in the reactor body can roll up and down alternately and be fully stirred; a large-diameter jet branch pipe and a serrated cutting disk are provided in the reactor body, so that the contact area between the gas and the liquid in the reactor body is more three-dimensional and sufficient, which can effectively reduce the reaction time of unit material. Since the material rolls up and down and the cutting and crushing effect of the serrated cutting disk is achieved, the problem of large agglomeration of finished product crystals causing blockage of the slurry unloading filter screen is avoided. At the same time, it also solves the problem of uneven stirring of the slurry at the bottom of most existing reactors. With this structure, the diameter of the reactor can be made larger under the condition of the same height, thereby increasing the volume of the reactor, which can improve the yield of a single reaction.

[0018] 2. The utility model sets an overflow port at a certain height of the kettle body. When the liquid in the kettle body is full to the overflow port, the control system is triggered to close the valves at the overflow port and the feed port, avoiding the waste of external discharge caused by excessive filling of the tank during feeding, and realizing fully automatic interconnected quantitative control of feeding.

[0019] 3. The utility model sets a water inlet pipe near the top of the reactor, and sets a number of jet nozzles at intervals on the water inlet pipe. After a round of reaction is completed, the water sprayed by the jet nozzles cleans the inner wall of the reactor body and the stirring blades, which can achieve the purpose of cleaning the tank body in a short time, shorten the production interval time and increase the output.

[0020] 4. The utility model sets a residual gas collector outside the kettle body to collect the residual gas that has not participated in the reaction, and separates the residual gas cleanly through a cyclone separator. Under the action of the residual gas screw induced draft fan, the separated clean gas is introduced into the kettle body through the residual gas inlet at the bottom of the kettle body to participate in the reaction for the second time. Due to the pressure of the screw fan, the gas and slurry in the reactor are in more complete contact, and at the same time, the environmental pollution caused by external discharge is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a specific implementation method of the present utility model.

[0022] Explanation of the reference numerals: 1-discharge port; 2-air pipe flushing water inlet pipe; 3-air inlet; 4-long pipe, 5-large-diameter jet branch pipe; 6-serrated cutting disc; 7-first spoiler; 8-stirring blade; 9-kettle body; 10-overflow port; 11-water inlet pipe, 12-feed port; 13-stirring shaft; 14-jet nozzle; 15-motor; 16-excess gas outlet; 17-excess gas collector; 18-excess gas valve; 19-cyclone separator; 20-second spoiler; 21-excess gas inlet; 22-excess gas screw induced draft fan. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0024] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specifically specified.

[0025] A high-efficiency nano calcium carbonate carbonization reactor, such as Figure 1 As shown, it includes a kettle body 9 of a reactor, the kettle body 9 is arranged vertically, a stirring shaft 13 is arranged in the middle of the kettle body 9, a stirring blade 8 is arranged on the stirring shaft 13, and a feeding port 12 is arranged on the top of the kettle body 9. During production, calcium hydroxide liquid is added to the kettle body 9 from the feeding port 12, and a plurality of long strips of spoilers are arranged obliquely along the inner side wall of the kettle body 9. The surface of the spoiler away from the kettle body 9 is the upper surface, and the upper surface is set at a certain angle. The spoiler includes a first spoiler 7 and a second spoiler 20, the upper end of the upper surface of the first spoiler 7 is closer to the inner side wall of the kettle body 9, and the lower end of the upper surface of the second spoiler 20 is closer to the inner side wall of the kettle body 9, and the first spoiler 7 and the second spoiler 20 are staggered, that is, staggered around the inner side wall of the kettle body 9. A serrated cutting disc 6 is provided at the lower end of the stirring shaft 13, and a plurality of serrations are provided on the serrated cutting disc 6; a plurality of large-diameter jet branch pipes 5 are provided below the serrated cutting disc 6, and the upper ends of the plurality of large-diameter jet branch pipes 5 are dispersedly arranged corresponding to the positions of the serrated cutting disc 6, and the lower ends are connected to a long tube 4, and the long tube 4 is connected to the air inlet 3 provided on the conical bottom surface of the kettle body 9, that is, the upper ends of the large-diameter jet branch pipes 5 are dispersedly arranged below the serrated cutting disc 6, and the lower ends are connected to the long tube 4. The pipe 4 is connected. Specifically, a short pipe with a larger diameter can be used as the large-diameter jet branch pipe 5. The gas (carbon dioxide) coming out of the large-diameter jet branch pipe 5 is immediately in contact with the calcium hydroxide in the reactor, reacting to form calcium carbonate crystals, which are attached to and accumulated in the form of scale at the large-diameter jet branch pipe 5. Since the large-diameter jet branch pipe 5 has a larger diameter, and under the stirring action of the serrated cutting disk 6, the crystals attached to the outlet of the large-diameter jet branch pipe 5 are easily taken away, which can ensure that the gas supply is unobstructed during the reaction process. A stirring blade 8, a serrated cutting disk 6 and a spoiler are set in the above-mentioned reactor. While stirring the liquid, the liquid can be alternately tumbled up and down, avoiding the formation of only layered mixing when stirred by a conventional agitator, which greatly reduces the reaction time. Specifically, a plurality of the stirring blades 8 are stacked on the stirring shaft 13 to improve the stirring efficiency and make the stirring more sufficient.

[0026] Specifically, an overflow port 10 is provided at a certain height position of the kettle body 9. When the liquid in the kettle body 9 is full to the overflow port 10, the control system is triggered to close the valves at the overflow port 10 and the feed port 12. Preferably, the overflow port 10 is provided at a position at three-quarters of the height of the kettle body 9, and the position of the overflow port 10 is higher than the highest point of the spoiler, which avoids the waste of external discharge caused by excessive filling of the tank during feeding, and realizes fully automatic interconnected quantitative control of feeding.

[0027] Specifically, a water inlet pipe 11 is provided near the top of the reactor, and a plurality of jet nozzles 14 are spaced apart on the water inlet pipe 11. Preferably, the jet nozzles 14 are high-pressure rotating jet nozzles. After a round of reaction is completed, a high-pressure water pump (not shown) provided outside the reactor flows water into the water inlet pipe 11. The high-pressure rotating jet nozzles omnidirectionally flush the inner wall of the reactor body 9 and the stirring blades 8, thereby quickly cleaning the tank body, effectively shortening production intervals and increasing output.

[0028] Specifically, a residual gas outlet 16 is provided at the top of the kettle body 9, and the residual gas outlet 16 is connected to a residual gas collector 17 provided outside the kettle body 9 to collect residual gas that has not participated in the reaction. A cyclone separator 19 is provided near the residual gas collector 17 to separate the residual gas. A residual gas inlet 21 is provided at the bottom of the kettle body 9, and a residual gas screw induced draft fan 22 is provided outside the kettle body 9 and connected to the residual gas inlet 21. Under the action of the residual gas screw induced draft fan 22, the clean gas separated by the cyclone separator 19 is passed into the kettle body 9 through the residual gas inlet 21, where it participates in the reaction again, reducing environmental pollution caused by external discharge.

[0029] The working process of this utility model: Figure 1As shown, according to the production process requirements of nano calcium carbonate, a sodium hydroxide solution adjusted to a certain temperature is added to the reactor through the feed port 12. When the liquid level reaches the overflow port 10, the control system is triggered to close the valves at the overflow port 10 and the feed port 12, and the motor 15 connected to the stirring shaft 13 is started in conjunction with the stirring blade 8 to start working. At the same time, a water ring machine (not shown in the figure) is started in conjunction with the stirring shaft 13 to eject carbon dioxide from the large-diameter jet branch pipe 5 through the air inlet 3 at a certain pressure. The serrated cutting disk 6 cuts the ejected carbon dioxide bubbles into fine bubbles. Under the action of the stirring blade 8 and the spoiler, the calcium hydroxide solution undergoes a sufficient chemical reaction with the carbon dioxide to generate calcium carbonate. After a period of time, the pH values of the upper and lower layers in the kettle body 9 are observed respectively to judge the degree of completion of the reaction. Before the reaction is completed, some carbon dioxide gas that does not have time to participate in the reaction will reach the residual gas collector 17 through the residual gas outlet 16 along with the water vapor generated by the reaction in the kettle body 9, and then some liquid will be separated, and some gas will be discharged from the residual gas valve 18. Most of the residual gas, under the action of the residual gas screw induced draft fan 22, will pass the separated clean gas into the kettle body 9 through the residual gas inlet 21 at the bottom of the kettle body 9 to participate in the reaction for the second time. After the reaction in the kettle body 9 is detected to be complete, the finished liquid is sent to the next work section through the discharge port 1. After the finished liquid is pumped, the external high-pressure clean water pump (not shown in the figure) is turned on, and high-pressure water enters the kettle body 9 through the water inlet pipe 11. The high-pressure water flow drives the rotating jet nozzle to comprehensively spray and clean the inner wall of the kettle body 9. At the same time, the high-pressure water flow branch flushes the water inlet pipe 11 through the air pipe to clean the large-diameter jet branch pipe 5. When the cleaning liquid inside the kettle body 9 reaches a certain water level, the motor 15 is started, and the speed of the stirring shaft 13 is adjusted by frequency conversion to stir and clean the inside of the kettle body 9. After cleaning, the valve of the discharge port 1 is opened to discharge the cleaning liquid, and the solution can be collected for secondary utilization.

[0030] Those skilled in the art will recognize that numerous variations to the foregoing description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0031] Although what are considered exemplary embodiments of the present invention have been described and illustrated, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept of the present invention as described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but rather may include all embodiments and their equivalents falling within the scope of the present invention.

Claims

1. A high-efficiency nano-calcium carbonate carbonization reactor, comprising a reactor body, the reactor body being vertically arranged, a stirring shaft being arranged in the middle of the reactor body, a stirring blade being arranged on the stirring shaft, and a feed port being arranged at the top of the reactor body, characterized in that: A plurality of long strip-shaped spoilers are obliquely arranged along the inner side wall of the kettle body, the surface of the spoiler away from the kettle body is the upper surface, and the upper surface is set at a certain angle. The spoiler includes a first spoiler and a second spoiler, the upper end of the upper surface of the first spoiler is closer to the inner side wall of the kettle body, and the lower end of the upper surface of the second spoiler is closer to the inner side wall of the kettle body, and the first spoiler and the second spoiler are staggered; a serrated cutting disk is provided at the lower end of the stirring shaft, and a plurality of serrations are provided on the serrated cutting disk; a plurality of large-diameter jet branch pipes are provided below the serrated cutting disk, and the upper ends of the plurality of large-diameter jet branch pipes are dispersedly arranged corresponding to the positions of the serrated cutting disks, and the lower ends are connected with a long tube, and the long tube is connected with an air inlet arranged on the conical bottom surface of the kettle body.

2. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 1, characterized in that: An overflow port is provided at a certain height position of the kettle body. When the liquid in the kettle body is full to the overflow port position, the control system is triggered to close the overflow port and the valves at the feed port.

3. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 2, characterized in that: An overflow port is provided at a position of three-quarters of the height of the kettle body, and the position of the overflow port is higher than the highest point of the spoiler.

4. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 1, characterized in that: A water inlet pipe is arranged in the reactor near the top thereof, and a plurality of jet nozzles are arranged at intervals on the water inlet pipe.

5. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 4, characterized in that: The jet nozzle is a high-pressure rotating jet nozzle.

6. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 1, characterized in that: A residual gas outlet is provided on the top of the kettle body, and the residual gas outlet is communicated with a residual gas collector provided outside the kettle body to collect the residual gas that does not participate in the reaction.

7. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 6, characterized in that: A cyclone separator is arranged near the residual gas collector to separate the residual gas cleanly, a residual gas inlet is arranged at the bottom of the kettle body, and a residual gas screw induced draft fan connected to the residual gas inlet is arranged outside the kettle body. Under the action of the residual gas screw induced draft fan, the clean gas separated by the cyclone separator is introduced into the kettle body through the residual gas inlet.

8. The high-efficiency nano-calcium carbonate carbonization reactor according to claim 1, characterized in that: A plurality of stirring blades are stacked on the stirring shaft.

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