Device for preparing calcium chloride by utilizing saponification residual liquid

Abstract

The utility model discloses a device for preparing calcium chloride by utilizing saponification residual liquid. The device comprises a saponification residual liquid receiving tank, a saponification reactor and a calcium chloride storage tank, wherein the inlet end of the saponification raffinate receiving tank is connected with an output pipeline of saponification raffinate, and the outlet end of the saponification raffinate receiving tank is connected into the saponification reactor; the saponification residual liquid reacts with an impurity removing agent in the saponification reactor, and calcium carbonate and calcium hydroxide in the saponification residual liquid are converted into calcium chloride; transferring calcium chloride into a calcium chloride storage tank for later use through an outlet of the saponification reactor; according to the utility model, the impurity removal agent and the saponification raffinate are mixed and fully reacted to convert calcium carbonate and calcium hydroxide in impurities into calcium chloride, so that the workload of a filter pressing treatment post on the existing saponification raffinate in the prior art is reduced, high-chlorine substances in wastewater are reduced, and the environment-friendly effect is achieved; meanwhile, calcium chloride with higher value and benefit is also obtained.

Description

Technical Field

[0001] The utility model relates to a saponification system of a propylene oxide device, in particular to a device for preparing calcium chloride by utilizing saponification residual liquid. Background Art

[0002] With the rapid development of industries such as polyether polyols, propylene glycol and various non-ionic surfactants, the industry's demand for propylene oxide is increasing. The use of chlorohydrin method to prepare propylene oxide will produce a large amount of saponification residue during the saponification reaction stage. Since the saponification residue contains impurities such as calcium hydroxide, calcium chloride, and calcium carbonate, the utilization rate of the saponification residue is currently very low and difficult to handle, resulting in damage to the ecological environment.

[0003] Therefore, the applicant hopes to seek technical solutions to solve the above technical problems. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a device for preparing calcium chloride using saponification residual liquid, by mixing an impurity remover with the saponification residual liquid for sufficient reaction, and converting calcium carbonate and calcium hydroxide in the impurities into calcium chloride, thereby reducing the workload of the existing saponification residual liquid pressure filter treatment post in the prior art, and reducing the high-chloride substances in the wastewater, achieving an environmental protection effect, and also obtaining calcium chloride with higher value benefits.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A device for preparing calcium chloride using saponification residual liquid, comprising a saponification residual liquid receiving tank, a saponification reactor and a calcium chloride storage tank; wherein:

[0007] The inlet end of the saponification residual liquid receiving tank is connected to the output pipeline of the saponification residual liquid, and the outlet end thereof is connected to the saponification reactor;

[0008] The saponification residue reacts with an impurity remover in a saponification reactor to convert calcium carbonate and calcium hydroxide in the saponification residue into calcium chloride;

[0009] The calcium chloride is transferred to a calcium chloride storage tank through the outlet of the saponification reactor for standby use.

[0010] Preferably, the saponification residue is the saponification residue produced in the saponification reaction stage of preparing propylene oxide by the chlorohydrin process.

[0011] Preferably, one side of the lower end of the saponification reactor is connected to a de-impurity agent feeding pipeline.

[0012] Preferably, the impurity remover is a hydrochloric acid solution.

[0013] Preferably, a buffer tank is provided between the saponification residual liquid receiving tank and the saponification reactor.

[0014] Preferably, a circulation pump is provided at the bottom of the saponification reactor to achieve the circulation flow of materials in the saponification reactor.

[0015] Preferably, a calcium chloride purifier is provided between the saponification reactor and the calcium chloride storage tank.

[0016] Preferably, the calcium chloride purifier adopts a spray dehydration tower or a heating device.

[0017] The utility model designs and transforms the process pipeline of the saponification reaction stage of preparing propylene oxide by the chlorohydrin method, proposes a device for preparing calcium chloride by utilizing the saponification residue, which is composed of a saponification residue receiving tank, a saponification reactor and a calcium chloride storage tank, adopts an impurity remover to mix with the saponification residue for full reaction, and converts calcium carbonate and calcium hydroxide in impurities into calcium chloride, thereby reducing the workload of the post for filter pressing treatment of the existing saponification residue in the prior art, reducing high-chloride substances in wastewater, achieving environmental protection effects, and obtaining calcium chloride with higher value benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a device for preparing calcium chloride by utilizing saponification residual liquid according to a specific implementation mode of the utility model. DETAILED DESCRIPTION

[0019] The utility model discloses a device for preparing calcium chloride by using saponification residual liquid, comprising a saponification residual liquid receiving tank, a saponification reactor and a calcium chloride storage tank; wherein the inlet end of the saponification residual liquid receiving tank is connected with the output pipeline of the saponification residual liquid, and the outlet end thereof is connected with the saponification reactor; the saponification residual liquid reacts with an impurity remover in the saponification reactor to convert calcium carbonate and calcium hydroxide in the saponification residual liquid into calcium chloride; and the calcium chloride is transferred to the calcium chloride storage tank through the outlet of the saponification reactor for standby use.

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] See also Figure 1 As shown, a device for preparing calcium chloride using saponification residual liquid includes a saponification residual liquid receiving tank 10 ( Figure 1The saponification reactor 20 is marked as "receiving tank"), a saponification reactor 20 and a calcium chloride storage tank 30; wherein, the inlet end of the saponification residue receiving tank 10 is connected to the output pipeline of the saponification residue (specifically, the saponification residue is the saponification residue produced in the saponification reaction stage of preparing propylene oxide by the chlorohydrin method, wherein the saponification residue contains calcium carbonate, calcium hydroxide and calcium chloride), and its outlet end is connected to the saponification reactor 20; the saponification residue reacts with the impurity remover in the saponification reactor 20 to convert the calcium carbonate and calcium hydroxide in the saponification residue into calcium chloride; the calcium chloride is transferred to the calcium chloride storage tank 30 through the outlet of the saponification reactor 20 for standby use.

[0022] Preferably, in this embodiment, one side of the lower end of the saponification reactor 20 is connected to a de-impurity agent feeding pipeline; specifically preferably, in this embodiment, the de-impurity agent is a hydrochloric acid solution.

[0023] Preferably, in order to further facilitate the feeding effect to the saponification reactor 20 , in the present embodiment, a buffer tank 40 is provided between the saponification residual liquid receiving tank 10 and the saponification reactor 20 .

[0024] Preferably, in order to facilitate a uniform and efficient reaction effect between the impurity remover and the saponification residue, in this embodiment, a circulation pump 50 is provided at the bottom of the saponification reactor 20 to achieve a circulating flow of materials in the saponification reactor 20 .

[0025] Preferably, in order to improve the purity of calcium chloride and facilitate subsequent applications, in the present embodiment, a calcium chloride purifier 60 is provided between the saponification reactor 20 and the calcium chloride storage tank 30; wherein preferably, the calcium chloride purifier 60 adopts a spray dehydration tower or a heating device, and of course, other calcium chloride purification devices in the prior art may also be adopted, and this embodiment does not make any special limitation on this.

[0026] In this embodiment, the process pipeline of preparing propylene oxide by the chlorohydrin method in the saponification reaction stage is designed and modified, and a device for preparing calcium chloride by utilizing saponification residual liquid, which is composed of a saponification residual liquid receiving tank, a saponification reactor and a calcium chloride storage tank, is proposed. An impurity remover is mixed with the saponification residual liquid to fully react, and calcium carbonate and calcium hydroxide in the impurities are converted into calcium chloride, thereby reducing the workload of the post for filter pressing treatment of the existing saponification residual liquid in the prior art, reducing high-chloride substances in the wastewater, achieving environmental protection effects, and obtaining calcium chloride with higher value benefits.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for preparing calcium chloride using saponification residue, characterized in that: It comprises a saponification residual liquid receiving tank (10), a saponification reactor (20) and a calcium chloride storage tank (30); wherein: The inlet end of the saponification residual liquid receiving tank (10) is connected to the output pipeline of the saponification residual liquid, and the outlet end thereof is connected to the saponification reactor (20); The saponification residue reacts with an impurity remover in a saponification reactor (20) to convert calcium carbonate and calcium hydroxide in the saponification residue into calcium chloride; The calcium chloride is transferred to a calcium chloride storage tank (30) through the outlet of the saponification reactor (20) for standby use.

2. The device for preparing calcium chloride by utilizing saponification residue according to claim 1, characterized in that: The saponification residue is the saponification residue produced in the saponification reaction stage of preparing propylene oxide by the chlorohydrin method.

3. The device for preparing calcium chloride by utilizing saponification raffinate according to claim 1, characterized in that: One side of the lower end of the saponification reactor (20) is connected to a de-impurity agent feeding pipeline.

4. The device for preparing calcium chloride by utilizing saponification residue according to claim 1 or 3, characterized in that: The impurity remover is a hydrochloric acid solution.

5. The device for preparing calcium chloride by utilizing saponification residue according to claim 1, characterized in that: A buffer tank (40) is provided between the saponification residual liquid receiving tank (10) and the saponification reactor (20).

6. The device for preparing calcium chloride by utilizing saponification residue according to claim 1, characterized in that: A circulation pump (50) is provided at the bottom of the saponification reactor (20) for achieving a circulating flow of materials in the saponification reactor (20).

7. The device for preparing calcium chloride by utilizing saponification residue according to claim 1, characterized in that: A calcium chloride purifier (60) is provided between the saponification reactor (20) and the calcium chloride storage tank (30).

8. The device for preparing calcium chloride by utilizing saponification residue according to claim 7, characterized in that: The calcium chloride purifier (60) adopts a spray dehydration tower.

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