Reaction kettle for preparing oxalate remover

Abstract

The utility model discloses a reaction kettle for preparing an oxalate remover. A conveying auger extending into a reaction tank is arranged at the top of the reaction tank; a liquid injection pipe is arranged on the side wall of the top of the reaction tank, and a flow meter and a control valve are arranged on the liquid injection pipe; a vacuum pump for adjusting internal air pressure is also arranged at the top of the reaction tank; and a plurality of heating cylinders are pre-arranged in the reaction tank and are positioned at the middle position of the stirring blade and the stirring scraper. Lime milk slurry is guided in by utilizing the conveying auger driven by the stirring motor in a transmission manner, and meanwhile, the filter screen is mounted at the opening in the bottom of the conveying auger, so that on one hand, the lime milk is stirred by utilizing auger blades, dry cakes in the lime milk are prevented, and the lime milk is prevented from flowing into a reaction tank by utilizing the filter screen; besides, a plurality of heating cylinders are mounted in the reaction tank, so that the heating cylinders can penetrate into the reaction tank conveniently, the interior of the reaction tank is effectively heated, and the reaction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a reaction kettle for preparing chemical agents, in particular to a reaction kettle for preparing an oxalate remover. Background Art

[0002] Oxalate removal refers to the process of removing oxalate from a solution or solid. As a substrate, oxalate usually interferes with the results of the experiment, so in some cases, oxalate needs to be removed from the system. There are two methods, one is oxidation, which is a common method for oxalate removal; the other is precipitation, which is another common method for oxalate removal.

[0003] The precipitation method utilizes some precipitants to precipitate oxalate from the solution, thereby achieving the removal of oxalate. Commonly used precipitants include calcium ions, silver ions, etc. For example, calcium chloride solution can be used to convert oxalate into calcium oxalate precipitate, and then the calcium oxalate precipitate can be separated by filtration.

[0004] Calcium chloride solution is a relatively low-cost oxalate remover and is conventionally prepared by adding lime milk to the mother liquor of soda ash produced by the ammonia-soda process to obtain an aqueous solution, which is then evaporated, concentrated, cooled, and solidified.

[0005] However, in the prior art, when lime milk and ammonium chloride are reacted in a reactor, the lime milk is not convenient to be introduced into the reactor. In addition, the reaction is an endothermic reaction, and heating is required to improve the reaction efficiency. Utility Model Content

[0006] The utility model aims to provide a reaction kettle for preparing an oxalate remover, so as to solve the problem that it is inconvenient to introduce lime milk into the reaction kettle in the conventional reaction kettle for preparing the oxalate remover.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] The utility model provides a reaction kettle for preparing an oxalate remover, comprising a reaction tank, a stirring shaft arranged in the reaction tank, a plurality of stirring blades arranged on the stirring shaft, and a stirring motor arranged outside the reaction tank; a drain pipe valve is arranged at the bottom of the reaction tank;

[0009] A conveying auger extending into the interior of the reaction tank is arranged on the top of the reaction tank; a liquid injection pipe is arranged on the top side wall of the reaction tank, and a flow meter and a control valve are arranged on the liquid injection pipe; an online pH monitor is also arranged in the reaction tank; a vacuum pump for adjusting the internal air pressure is also arranged on the top of the reaction tank;

[0010] A stirring scraper in contact with the bottom of the reaction tank is arranged on the stirring shaft;

[0011] A plurality of heating cylinders are preset in the reaction tank at a middle height between the stirring blade and the stirring scraper.

[0012] Furthermore, a reducer is provided on the top of the reaction tank and is transmission-connected to the stirring shaft, and the reducer is transmission-connected to the stirring motor.

[0013] Furthermore, the conveying auger includes a conveying cylinder extending into the reaction tank, a rotating shaft arranged in the conveying cylinder, and an auger blade installed on the rotating shaft; wherein a feeding hopper for feeding is arranged on the top side wall of the conveying cylinder, a discharge port is opened on the bottom side wall of the conveying cylinder, and a filter screen is arranged at the discharge port;

[0014] The upper end of the rotating shaft is connected to the power output shaft of the stirring motor through a transmission belt;

[0015] A transmission wheel which wraps around the transmission belt is arranged on the upper end of the rotating shaft and the power output shaft of the stirring motor.

[0016] Furthermore, a plurality of the heating tubes are symmetrically arranged along the radial direction of the reaction tank, each of the heating tubes is a blind hole metal tube, and is respectively connected to the input end of the heat transfer oil through a heating oil conduit.

[0017] Furthermore, a temperature sensor is arranged in the reaction tank.

[0018] Compared with the prior art, the beneficial technical effects of the utility model are:

[0019] In the utility model, a conveying auger driven by a stirring motor is used to introduce lime milk slurry, and a filter screen is installed at the bottom opening of the conveying auger. On the one hand, the lime milk is stirred by the auger blades to prevent dry lumps in the lime milk, and at the same time, the filter screen is used to prevent it from flowing into the reaction tank; in addition, a plurality of heating cylinders are installed in the reaction tank so as to penetrate deep into the reaction tank and effectively heat the reaction tank to improve the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the main structure of a reaction kettle for preparing an oxalate remover according to the utility model;

[0022] Figure 2 A schematic diagram of a bottom top view of a reaction kettle for preparing an oxalate remover according to the utility model;

[0023] Figure 3 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0024] Explanation of the reference numerals: 1. reaction tank; 101. drain valve; 2. stirring shaft; 201. stirring blade; 202. stirring scraper; 3. stirring motor; 301. reducer; 302. transmission belt; 4. conveying auger; 401. feed hopper; 402. auger blade; 403. filter screen; 404. discharge port; 5. injection pipe; 6. pH online monitor; 7. vacuum pump; 701. vacuum tube; 8. heating cylinder; 801. heating oil guide pipe. DETAILED DESCRIPTION

[0025] This embodiment discloses a reactor for preparing an oxalate remover, comprising a reaction tank 1, a stirring shaft 2 installed in the reaction tank 1 through a sealed bearing, a plurality of stirring blades 201 installed on the stirring shaft 2, and a stirring motor 3 installed outside the reaction tank 1; a drain pipe valve 101 is installed at the bottom of the reaction tank 1;

[0026] In this embodiment, a reducer 301 drivingly connected to the stirring shaft 2 is installed on the top of the reaction tank 1 , and the reducer 301 is drivingly connected to the stirring motor 3 .

[0027] There are many types of oxalate removers, of which calcium chloride is a more common and less expensive product;

[0028] In industry, calcium chloride is made from the mother liquor of the ammonia-soda process for producing soda ash, which is then evaporated, concentrated, cooled and solidified to obtain an aqueous solution by adding lime milk.

[0029] This embodiment is specifically applied to a reaction kettle of mother liquor (main component ammonium chloride) and lime milk when preparing soda ash.

[0030] like Figure 1 As shown, in this embodiment, a conveying auger 4 extending into the interior of the reaction tank 1 is installed on the top of the reaction tank 1;

[0031] Specifically, the conveying auger 4 includes a conveying cylinder extending into the reaction tank 1, a rotating shaft installed in the conveying cylinder, and an auger blade 402 installed on the rotating shaft, wherein the rotating outer diameter of the auger blade 402 is in contact with the inner wall of the conveying cylinder, so as to effectively convey the lime milk into the reaction tank 1;

[0032] A feed hopper 401 for injecting lime milk slurry is installed on the top side wall of the conveying cylinder, and is specifically provided with an inclined wide-mouth structure to facilitate the injection of lime milk;

[0033] like Figure 3As shown, a discharge port 404 is provided on the bottom side wall of the conveying cylinder, and a filter screen 403 is installed at the discharge port 404; in this embodiment, the auger blade 402 can be used to stir the lime milk to prevent dry lumps in the lime milk, and the filter screen 403 can be used to prevent it from flowing into the reaction tank 1.

[0034] like Figure 1 As shown, a transmission belt 302 is used to connect the upper end of the rotating shaft to the power output shaft of the stirring motor 3; transmission wheels that wrap around an angle with the transmission belt 302 are installed on the upper end of the rotating shaft and the power output shaft of the stirring motor 3; thereby, the conveying auger 4 is driven to rotate by means of the stirring motor 3.

[0035] In this embodiment, an injection pipe 5 is installed on the top side wall of the reaction tank 1 for injecting ammonium chloride solution into the reaction tank 1, and a flow meter and a control valve are installed on the injection pipe 5 to facilitate control for quantitative injection.

[0036] In this embodiment, an online pH monitor 6 is installed in the reaction tank 1 to detect the progress of the reaction in the reaction tank 1 .

[0037] A vacuum pump 7 for adjusting the internal air pressure of the reaction tank 1 is also installed on the top of the reaction tank 1, so as to timely extract the ammonia produced by the reaction tank 1 for recycling or preparing by-product ammonia.

[0038] As shown in the figure, a stirring scraper 202 in contact with the bottom of the reaction tank 1 is installed on the stirring shaft 2 to prevent the lime milk from adhering to the bottom of the reaction tank 1 and improve the reaction efficiency.

[0039] In this embodiment, a plurality of heating cylinders 8 are preset in the reaction tank 1 at a middle height between the stirring blade 201 and the stirring scraper 202 .

[0040] like Figure 1 and Figure 2 As shown, a plurality of heating tubes 8 are symmetrically installed along the radial direction in the reaction tank 1, and each of the heating tubes 8 is a blind hole metal tube, which is used to be isolated from the liquid in the reaction tank 1 and improve the effective heat exchange, and is connected to the input end of the heat transfer oil or heat transfer steam through the heating oil conduit 801 respectively.

[0041] In this embodiment, a temperature sensor is installed in the reaction tank 1 to increase the heat exchange rate in the heating oil conduit 801 according to demand; specifically, the heating cylinder 8 is connected to the heat transfer oil or heat transfer steam input end through two heating oil conduits 801 circulation; specifically, a delivery pump is installed on the heating oil conduit 801.

[0042] The above embodiments are only descriptions of the preferred methods of the invention, and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solution of the invention by ordinary technicians in this field should fall within the protection scope of the claims of the invention.

Claims

1. A reactor for preparing an oxalate remover, comprising a reaction tank (1), a stirring shaft (2) arranged in the reaction tank (1), a plurality of stirring blades (201) arranged on the stirring shaft (2), and a stirring motor (3) arranged outside the reaction tank (1); a drain pipe valve (101) is arranged at the bottom of the reaction tank (1); and the characteristics are: A conveying auger (4) extending into the interior of the reaction tank (1) is arranged on the top of the reaction tank (1); a liquid injection pipe (5) is arranged on the top side wall of the reaction tank (1), and a flow meter and a control valve are arranged on the liquid injection pipe (5); an online pH monitor (6) is also arranged in the reaction tank (1); and a vacuum pump (7) for adjusting the internal air pressure is also arranged on the top of the reaction tank (1); A stirring scraper (202) is provided on the stirring shaft (2) and contacts the bottom of the reaction tank (1); A plurality of heating cylinders (8) are preset in the reaction tank (1) and located at a mid-height between the stirring blade (201) and the stirring scraper (202).

2. The reaction kettle for preparing an oxalate remover according to claim 1, characterized in that: A reducer (301) is arranged on the top of the reaction tank (1) and is transmission-connected to the stirring shaft (2); the reducer (301) is transmission-connected to the stirring motor (3).

3. The reaction kettle for preparing an oxalate remover according to claim 2, characterized in that: The conveying auger (4) comprises a conveying cylinder extending into the reaction tank (1), a rotating shaft arranged in the conveying cylinder, and an auger blade (402) mounted on the rotating shaft; wherein a feeding hopper (401) for feeding materials is arranged on the top side wall of the conveying cylinder, a discharge port (404) is opened on the bottom side wall of the conveying cylinder, and a filter screen (403) is arranged at the discharge port (404); The upper end of the rotating shaft is connected to the power output shaft of the stirring motor (3) through a transmission belt (302); A transmission wheel which wraps around an angle with the transmission belt (302) is arranged on the upper end of the rotating shaft and on the power output shaft of the stirring motor (3).

4. The reaction kettle for preparing an oxalate remover according to claim 1, characterized in that: A plurality of heating tubes (8) are symmetrically arranged along the radial direction of the reaction tank (1), and each of the heating tubes (8) is a blind hole metal tube and is connected to the input end of the heat transfer oil through a heating oil conduit (801).

5. The reaction kettle for preparing an oxalate remover according to claim 1, characterized in that: A temperature sensor is arranged in the reaction tank (1).

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