Carbon decomposition device for producing borax decahydrate by using high-concentration carbon dioxide

Abstract

The utility model discloses a carbon decomposition device for producing borax decahydrate by using high-concentration carbon dioxide. The carbon decomposition device comprises nine carbon decomposition tanks, every three carbon decomposition tanks form a group, and three groups are connected in parallel; the upper part of each carbon decomposition tank comprises a serial-in end head, a carbon dioxide main pipe end head connected with a carbon dioxide main pipe, a discharging main pipe end head connected with a discharging main pipe, a feeding main pipe end head connected with a feeding main pipe, an emptying main pipe end head connected with an emptying main pipe, a tail gas main pipe end head connected with a tail gas main pipe and a serial-out end head; in each group, the serial-in end of each carbon decomposition tank is connected with the serial-out end of the adjacent carbon decomposition tank in series; a steam header pipe end connected with a steam header pipe is arranged on the side wall of the carbon decomposition tank; a steam condensate pipe is arranged at the lower part of the carbonolysis tank. According to the utility model, three tanks are connected in series for carbon decomposition reaction, so that the fluctuation of carbon dioxide pressure during discharging is reduced, the stability of system pressure is facilitated, and the absorption and carbon decomposition reaction of carbon dioxide are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of extracting useful elements from minerals, and is a device for extracting boron from boron concentrate and shortening carbonization time. Background Art

[0002] Boron (B) is a typical non-metallic element. Boron minerals are mainly used to produce borax and boric acid, as well as elemental boron and boron compounds, and are widely used in various sectors of the national economy. Most boron compounds are resistant to high temperatures and wear, and are widely used in chemical, pharmaceutical, light industry, textile, electronics, metallurgy, building materials, national defense, cutting-edge science, agriculture and other sectors. The development and utilization of boron resources play an increasingly important role in the development of modern industry.

[0003] Boron (B) has a natural abundance of about 0.001% in nature. It mainly exists in minerals such as borax, colemanite, ulexite and boraxite. It exists in the form of liquid ore in some salt lakes. There is also a certain boron concentration in seawater.

[0004] For boron ore, a mineral resource that is difficult to form, has a low grade, and is in short supply, it is usually enriched and obtained after beneficiation to obtain high-grade boron concentrate, which is then roasted and activated at high temperature, and then chemically treated to prepare borax or boric acid. For the carbonization reaction in production, the existing technology is to calcine coal particles and limestone in a lime kiln workshop to produce lime and kiln gas, and the kiln gas is compressed by a washing, filtering, and air compressor to provide the carbonization reaction with a CO2 concentration of 37%. This technology has a long reaction time, high cost, and poor economic benefits. Utility Model Content

[0005] The utility model aims to provide a carbonization device for producing borax decahydrate by utilizing high-concentration carbon dioxide, comprising 9 carbonization tanks; 3 carbonization tanks form a group, and the 3 groups are connected in parallel; the upper part of each carbonization tank comprises a series-in terminal, a carbon dioxide main pipe terminal connected to a carbon dioxide main pipe, a discharge main pipe terminal connected to a discharge main pipe, a feed main pipe terminal connected to a feed main pipe, a vent main pipe terminal connected to a vent main pipe, an exhaust main pipe terminal connected to an exhaust main pipe, and a series-out terminal; in each group, the series-in terminal of each carbonization tank is connected in series with the series-out terminal of an adjacent carbonization tank; a steam main pipe terminal connected to a steam main pipe is arranged on a side wall of the carbonization tank; a steam condensate pipe is arranged at the lower part of the carbonization tank.

[0006] The tail gas main pipe end is connected to the tail gas main pipe, the tail gas main pipe is connected to the sedimentation tank; the sedimentation tank is connected to the purification cooling tank, the purification cooling tank is connected to the compressor, the compressor is connected to the buffer tank, and the buffer tank is connected to the carbon dioxide main pipe; the tail gas main pipe is cooled by a shell and tube heat exchanger before entering the sedimentation tank, and the cold medium used for heat exchange is the borax mother liquor circulated by the system itself.

[0007] The carbon decomposition tank is also provided with a carbon decomposition tank pressure gauge and a thermometer, and the end of the steam main pipe is also connected to the steam pressure gauge.

[0008] There are two sedimentation tanks connected in series.

[0009] The utility model has the advantages of: adopting three tanks in series for carbonization reaction, reducing the fluctuation of carbon dioxide pressure during discharge, being beneficial to the stability of system pressure, facilitating the absorption of carbon dioxide and carbonization reaction; shortening the carbonization reaction time, reducing production costs and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall equipment connection for the carbon decomposition reaction;

[0011] Figure 2 It is a structural schematic diagram of the carbon decomposition tank;

[0012] Figure 3 It is a schematic diagram of the connection between carbon decomposition tanks;

[0013] Figure 4 It is a structural schematic diagram of the tail gas recovery device;

[0014] In the figure, 1 is the carbon dioxide main pipe, 2 is the exhaust main pipe, and 3 is the end of the steam main pipe.

[0015] 4 is the inlet terminal, 5 is the carbon dioxide main pipe terminal, 6 is the discharge main pipe terminal, 7 is the feed main pipe terminal, 8 is the vent main pipe terminal, 9 is the carbonization tank body, 10 is the tail gas main pipe terminal, 11 is the outlet terminal; 12 is the steam pressure gauge, 13 is the carbonization tank pressure gauge, 14 is the thermometer, 15 is the steam condensate pipe, 16 is the shell and tube heat exchanger, 17 is the sedimentation tank, 18 is the purification cooling tank, 19 is the buffer tank, 20 is the compressor, and 91-99 are carbonization tank one to carbonization tank nine respectively. DETAILED DESCRIPTION

[0016] The utility model is described in detail below with reference to the accompanying drawings;

[0017] The utility model comprises 9 carbonization tanks; every 3 carbonization tanks form a group, and the 3 groups are connected in parallel; the upper part of each carbonization tank comprises a series-in terminal, a carbon dioxide main pipe terminal connected to a carbon dioxide main pipe, a discharge main pipe terminal connected to a discharge main pipe, a feed main pipe terminal connected to a feed main pipe, a vent main pipe terminal connected to a vent main pipe, an exhaust main pipe terminal connected to an exhaust main pipe, and a series-out terminal; in each group, the series-in terminal of each carbonization tank is connected in series with the series-out terminal of an adjacent carbonization tank; a steam main pipe terminal connected to a steam main pipe is arranged on a side wall of the carbonization tank; a steam condensate pipe is arranged at the lower part of the carbonization tank.

[0018] The tail gas main pipe end is connected to the tail gas main pipe, the tail gas main pipe is connected to the sedimentation tank; the sedimentation tank is connected to the purification cooling tank, the purification cooling tank is connected to the compressor, the compressor is connected to the buffer tank, and the buffer tank is connected to the carbon dioxide main pipe; the tail gas main pipe is cooled by a shell and tube heat exchanger before entering the sedimentation tank, and the cold medium used for heat exchange is the borax mother liquor circulated by the system itself.

[0019] The carbon decomposition tank is also provided with a carbon decomposition tank pressure gauge and a thermometer, and the end of the steam main pipe is also connected to the steam pressure gauge. There are two sedimentation tanks, which are connected in series.

[0020] Operation process

[0021] According to the batching requirements, the prepared slurry is transported to the carbonization tank, and carbon dioxide gas is introduced for reaction. The opening of the tail gas valve (or the outlet valve) is controlled to ensure that the carbonization reaction pressure is 0.7-0.75Mpa; at the same time, steam is introduced into the jacket for heating, and the temperature of the carbonization tank is controlled at 125-130°. When the reaction temperature reaches 125-130°, the calculated time is 4 hours, and the total reaction time is 8 hours. The insoluble boron content (B2O3) in the slag of the carbonization reaction is ≤2.5%, which meets the process requirements.

Claims

1. A carbonization device for producing borax decahydrate using high-concentration carbon dioxide, characterized in that: It comprises 9 carbonization tanks; each 3 carbonization tanks form a group, and the 3 groups are connected in parallel; the upper part of each carbonization tank comprises a series-in terminal, a carbon dioxide main pipe terminal connected to the carbon dioxide main pipe, a discharge main pipe terminal connected to the discharge main pipe, a feed main pipe terminal connected to the feed main pipe, a vent main pipe terminal connected to the vent main pipe, an exhaust main pipe terminal connected to the exhaust main pipe, and a series-out terminal; in each group, the series-in terminal of each carbonization tank is connected in series with the series-out terminal of the adjacent carbonization tank; a steam main pipe terminal connected to the steam main pipe is arranged on the side wall of the carbonization tank; a steam condensate pipe is arranged at the lower part of the carbonization tank.

2. The carbonization device for producing borax decahydrate using high-concentration carbon dioxide according to claim 1, characterized in that: The tail gas main pipe end is connected to the tail gas main pipe, the tail gas main pipe is connected to the sedimentation tank; the sedimentation tank is connected to the purification cooling tank, the purification cooling tank is connected to the compressor, the compressor is connected to the buffer tank, and the buffer tank is connected to the carbon dioxide main pipe; the tail gas main pipe is cooled by a shell and tube heat exchanger before entering the sedimentation tank, and the cold medium used for heat exchange is the borax mother liquor circulated by the system itself.

3. The carbonization device for producing borax decahydrate using high concentration carbon dioxide according to claim 1, characterized in that: The carbon decomposition tank is also provided with a carbon decomposition tank pressure gauge and a thermometer, and the end of the steam main pipe is also connected to the steam pressure gauge.

4. The carbonization device for producing borax decahydrate using high-concentration carbon dioxide according to claim 2, characterized in that: There are two sedimentation tanks connected in series.

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