Ferric trichloride spray tower

Abstract

According to the ferric trichloride spray tower disclosed by the utility model, when chlorine is introduced into a primary ferric salt washing tower through a chlorine inlet, a first spray pipe extracts a ferrous chloride solution in a first circulating tank and sprays the ferrous chloride solution into the primary ferric salt washing tower, and the ferrous chloride solution reacts with the chlorine to generate a ferric trichloride solution; the mixed solution of the ferrous chloride solution and the ferric trichloride solution is collected in the first circulating tank again, in the solution circulating process in the first circulating tank, the concentration of the ferrous chloride solution is reduced, the ferric trichloride solution is increased, then the ferric trichloride solution is obtained, and the generation amount of ferric trichloride is guaranteed.

Description

Technical Field

[0001] The utility model relates to a ferric chloride forming device, in particular to a ferric chloride spray tower. Background Art

[0002] In the process of forming ferric chloride from anhydrous aluminum chloride, the anhydrous aluminum chloride needs to be washed by a water washing tower, part of the hydrogen chloride gas is filtered, and only chlorine is introduced into an iron salt washing tower, and the chlorine reacts with ferrous chloride sprayed in the iron salt washing tower to form ferric chloride;

[0003] However, the existing generation method will cause some chlorine to overflow, resulting in low quality of the generated ferric chloride, and it is necessary to ensure a high concentration of ferrous chloride solution, which greatly increases the amount of ferrous chloride solution used;

[0004] In summary, how to reduce the amount of ferrous chloride solution used while ensuring the amount of ferric chloride produced has become an urgent problem that researchers in this field need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to reduce the usage of ferrous chloride solution while ensuring the generation of ferric chloride;

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] The utility model discloses a ferric chloride spray tower, which comprises a primary iron salt washing tower and a secondary iron salt washing tower which are arranged in parallel; a chlorine gas inlet which is arranged at one side of the primary iron salt washing tower; a secondary chlorine gas connecting pipe which is connected to the top of the primary iron salt washing tower and one side of the secondary iron salt washing tower; a first spray pipe, a spray end of which is arranged in the primary iron salt washing tower, and one end of which is connected to a first circulation tank; a second spray pipe, a spray end of which is arranged in the secondary iron salt washing tower, and one end of which is connected to a second circulation tank; a first liquid outlet which is connected to the bottom of the primary iron salt washing tower and the first circulation tank; a second liquid outlet which is connected to the bottom of the secondary iron salt washing tower and the second circulation tank; a ferrous chloride raw material tank which is connected to the first circulation tank and the second circulation tank;

[0008] In this scheme, when chlorine gas is introduced into the primary iron salt washing tower through the chlorine gas inlet, the first spray pipe extracts the ferrous chloride solution in the first circulation tank and sprays it into the primary iron salt washing tower, the ferrous chloride solution reacts with the chlorine gas to generate a ferric chloride solution, and the mixed solution of the ferrous chloride solution and the ferric chloride solution is collected in the first circulation tank again. During the solution circulation process in the first circulation tank, the concentration of the ferrous chloride solution decreases and the concentration of the ferric chloride solution increases, thereby obtaining the ferric chloride solution;

[0009] After passing through the primary iron salt washing tower, some chlorine will not be sprayed and reacted, and enter the secondary iron salt washing tower through the secondary chlorine connecting pipe. The second spray pipe extracts the ferrous chloride solution in the second circulation tank and sprays it into the primary iron salt washing tower. The ferrous chloride solution reacts with chlorine to generate a ferric chloride solution. The mixed solution of the ferrous chloride solution and the ferric chloride solution is collected in the second circulation tank again. During the solution circulation process in the second circulation tank, the concentration of the ferrous chloride solution decreases and the concentration of the ferric chloride solution increases, thereby obtaining a ferric chloride solution.

[0010] The ferrous chloride raw material tank contains ferrous chloride solution, which is added to the second circulation tank and the first circulation tank.

[0011] In summary, the production efficiency of chlorine to ferric chloride is improved and the escape of chlorine is reduced.

[0012] In the above scheme, during the reaction process, since the concentration of chlorine in the primary iron salt washing tower is high, the amount of ferrous chloride solution used in the reaction is large, the concentration of ferrous chloride solution in the first circulation tank is low, the concentration of chlorine in the secondary iron salt washing tower is low, and the amount of ferrous chloride solution used in the reaction is small, so that the amount of ferric chloride generated in the second circulation tank is small, and the concentration of ferrous chloride solution in the second circulation tank is high. In order to reduce the use of ferrous chloride solution, the utility model adopts an iron filings tank for holding iron filings between the bottom of the secondary iron salt washing tower and the second circulation tank; the second spray pipe is provided with a liquid separator connected to the first circulation tank;

[0013] After the reaction in the secondary iron salt washing tower, the second circulation tank has more ferrous chloride solution and less ferric chloride solution. When the ferric chloride solution passes through the iron filings tank, it is reduced to ferrous chloride solution. The ferrous chloride solution is added to the first circulation tank through the liquid separation pipe to increase the concentration of ferrous chloride in the first circulation tank, thus reducing the usage of ferrous chloride solution.

[0014] The ferric chloride solution discharged from the secondary iron salt washing tower is reduced to ferrous chloride through the iron chip trough and replenishes the first circulation tank, which can reduce the use of ferrous chloride solution.

[0015] In order to further remove the chlorine, the utility model adopts the top of the secondary iron salt washing tower to be connected to the alkali washing tower through the first exhaust pipe, and the alkali washing tower is connected to the chimney through the second exhaust pipe;

[0016] In this way, the purpose of completely removing chlorine can be achieved through the spraying of the alkaline washing tower.

[0017] The beneficial effects of the utility model are as follows: the utility model is a ferric chloride spray tower, when chlorine is introduced into a primary iron salt washing tower through a chlorine inlet, a ferrous chloride solution in a first circulation tank is drawn by a first spray pipe and sprayed into the primary iron salt washing tower, the ferrous chloride solution reacts with chlorine to generate a ferric chloride solution, a mixed solution of the ferrous chloride solution and the ferric chloride solution is collected in the first circulation tank again, during the solution circulation process in the first circulation tank, the concentration of the ferrous chloride solution decreases and the concentration of the ferric chloride solution increases, thereby obtaining a ferric chloride solution, and ensuring the amount of ferric chloride generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is the principle diagram of the utility model;

[0020] In the figure: 1-a primary iron salt washing tower, 2-a secondary iron salt washing tower, 3-a chlorine gas inlet, 4-a secondary chlorine gas connecting pipe, 5-a first spray pipe, 6-a first circulation tank, 7-a second spray pipe, 8-a second circulation tank, 9-a first liquid outlet pipe, 10-a second liquid outlet, 11-a ferrous chloride raw material tank, 12-a liquid separation pipe, 13-a scrap iron tank, 14-a first exhaust pipe, 15-an alkali washing tower, 16-a second exhaust pipe, 17-a chimney, 18-a ferric chloride solution collecting box. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] The utility model is a ferric chloride spray tower, which comprises a primary iron salt washing tower 1 and a secondary iron salt washing tower 2 which are arranged in parallel; a chlorine gas inlet 3 which is arranged at one side of the primary iron salt washing tower 1; a secondary chlorine gas connecting pipe 4 which is connected to the top of the primary iron salt washing tower 1 and one side of the secondary iron salt washing tower 2; a first spray pipe 5, a spray end of which is arranged in the primary iron salt washing tower 1, and one end of which is connected to a first circulation tank 6; a second spray pipe 7, a spray end of which is arranged in the secondary iron salt washing tower 2, and one end of which is connected to a second circulation tank 8; a first liquid outlet pipe 9 which is connected to the bottom of the primary iron salt washing tower 1 and the first circulation tank 6; a second liquid outlet 10 which is connected to the bottom of the secondary iron salt washing tower 2 and the second circulation tank 8; a ferrous chloride raw material tank 11 which is connected to the first circulation tank 6 and the second circulation tank 8;

[0023] In this scheme, when chlorine gas is introduced into the primary iron salt washing tower through the chlorine gas inlet, the first spray pipe draws the ferrous chloride solution in the first circulation tank and sprays it into the primary iron salt washing tower, the ferrous chloride solution reacts with the chlorine gas to generate a ferric chloride solution, and the mixed solution of the ferrous chloride solution and the ferric chloride solution is collected in the first circulation tank again. During the solution circulation process in the first circulation tank, the concentration of the ferrous chloride solution decreases and the concentration of the ferric chloride solution increases, thereby obtaining a ferric chloride solution, which is collected in the ferric chloride solution collection box 18.

[0024] After passing through the primary iron salt washing tower, some chlorine will not be sprayed and reacted, and enter the secondary iron salt washing tower through the secondary chlorine connecting pipe. The second spray pipe extracts the ferrous chloride solution in the second circulation tank and sprays it into the primary iron salt washing tower. The ferrous chloride solution reacts with chlorine to generate a ferric chloride solution. The mixed solution of the ferrous chloride solution and the ferric chloride solution is collected in the second circulation tank again. During the solution circulation process in the second circulation tank, the concentration of the ferrous chloride solution decreases and the concentration of the ferric chloride solution increases, thereby obtaining a ferric chloride solution.

[0025] The ferrous chloride raw material tank contains ferrous chloride solution, which is added to the second circulation tank and the first circulation tank.

[0026] In summary, the production efficiency of chlorine to ferric chloride is improved and the escape of chlorine is reduced.

[0027] In the above scheme, during the reaction process, since the concentration of chlorine in the primary iron salt washing tower is high, the amount of ferrous chloride solution used in the reaction is large, the concentration of ferrous chloride solution in the first circulation tank is low, the concentration of chlorine in the secondary iron salt washing tower is low, and the amount of ferrous chloride solution used in the reaction is small, so that the amount of ferric chloride generated in the second circulation tank is small, and the concentration of ferrous chloride solution in the second circulation tank is high. In order to reduce the use of ferrous chloride solution, the utility model adopts an iron filings tank 13 for holding iron filings between the bottom of the secondary iron salt washing tower 2 and the second circulation tank 8; the second spray pipe 7 is provided with a liquid separator 12 connected to the first circulation tank 6;

[0028] After the reaction in the secondary iron salt washing tower, the second circulation tank has more ferrous chloride solution and less ferric chloride solution. When the ferric chloride solution passes through the iron filings tank, it is reduced to ferrous chloride solution. The ferrous chloride solution is added to the first circulation tank through the liquid separation pipe to increase the concentration of ferrous chloride in the first circulation tank, thus reducing the usage of ferrous chloride solution.

[0029] The ferric chloride solution discharged from the secondary iron salt washing tower is reduced to ferrous chloride through the iron chip trough and replenishes the first circulation tank, which can reduce the use of ferrous chloride solution.

[0030] In order to further remove the chlorine, the utility model adopts the top of the secondary iron salt washing tower 3 to be connected to the alkali washing tower 15 through the first exhaust pipe 14, and the alkali washing tower 15 is connected to the chimney 17 through the second exhaust pipe 16;

[0031] In this way, the purpose of completely removing chlorine can be achieved through the spraying of the alkaline washing tower.

[0032] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A ferric chloride spray tower, characterized in that, include: The primary iron salt washing tower and the secondary iron salt washing tower are arranged in parallel; A chlorine gas inlet is arranged on one side of the primary iron salt washing tower; A secondary chlorine gas connecting pipe, which connects the top of the primary iron salt washing tower and one side of the secondary iron salt washing tower; A first spray pipe, a spray end of which is arranged in the primary iron salt washing tower, and one end of which is connected to the first circulation tank; A second spray pipe, a spray end of which is arranged in the secondary iron salt washing tower, and one end of which is connected to the second circulation tank; A first liquid outlet pipe connected to the bottom of the primary iron salt washing tower and the first circulation tank; A second liquid outlet, which is connected to the bottom of the secondary iron salt washing tower and the second circulation tank; A ferrous chloride raw material tank is connected to the first circulation tank and the second circulation tank.

2. A ferric chloride spray tower according to claim 1, characterized in that, An iron scrap trough for holding iron scraps is provided between the bottom of the secondary iron salt washing tower and the second circulation tank; The second spray pipe is provided with a liquid distribution pipe connected with the first circulation tank.

3. A ferric chloride spray tower according to claim 1, characterized in that, The top of the secondary iron salt washing tower is connected to the alkali washing tower through a first exhaust pipe, and the alkali washing tower is connected to the chimney through a second exhaust pipe.

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