Static mixing and neutralization device for sodium benzoate production

Abstract

The utility model provides a static mixing and neutralizing device for the production of sodium benzoate. The device is provided with a static mixing mechanism between a storage tank and a neutralizing kettle, wherein a plurality of rows of partitions arranged in a three-dimensional matrix and staggered with each other are provided in the mixing mechanism, and the partitions are divided into a left half and a right half after a baffle is provided on the first row of partitions, and a partition connected to adjacent partitions is provided in the left half and the right half at intervals and staggered positions; the feed liquid can be mixed safely, quickly and fully; and a pH meter is installed between the static mixing mechanism and the feed port of the neutralizing kettle, and between the neutralizing kettle and the filtering mechanism, so that the feed ratio of each raw material and the uniformity of mixing can be adjusted according to the change of pH value, so as to ensure the normal reaction of benzoic acid and sodium hydroxide; the utility model significantly improves the overall practicality and efficiency of the static mixing and neutralizing device for the production of sodium benzoate through design.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a static mixing and neutralizing device for the production of sodium benzoate. Background Art

[0002] At present, the industrial production of sodium benzoate mainly adopts the intermittent neutralization method, that is, benzoic acid solution and sodium hydroxide aqueous solution are respectively put into the premixing kettle, after the first premixing and the second premixing, they are transferred to the neutralization kettle for neutralization reaction, and then activated carbon is added for adsorption and impurity removal. The qualified high-temperature concentrated solution is transported to the finished product tank and handed over to the downstream process to be made into sodium benzoate finished product.

[0003] However, the above production process has problems such as low mixing efficiency, intermittent production, and the production process is difficult to control.

[0004] In view of this, it is necessary to design a static mixing neutralization device for sodium benzoate production to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a static mixing and neutralization device for the production of sodium benzoate, which can fully mix the benzoic acid solution and the sodium hydroxide aqueous solution, and make the whole production process easy to control.

[0006] To achieve the above-mentioned purpose, the utility model provides a static mixing and neutralization device for sodium benzoate production, comprising: a material storage tank, a static mixing mechanism connected to the material storage tank, a neutralization kettle connected to the static mixing mechanism, a filtering mechanism connected to the neutralization kettle, and a finished product storage tank connected to the filtering mechanism;

[0007] The static mixing mechanism comprises a mixing mechanism, a first feed pipe and a second feed pipe respectively connected to one end of the mixing mechanism;

[0008] The mixing mechanism is provided with several rows of separators arranged in a three-dimensional matrix; the separators are staggered with each other; a baffle is provided on the first row of separators close to one end of the first feed pipe and the second feed pipe; the first row of separators is perpendicular to the baffle; the baffle divides the first row of separators into a left half and a right half; the left half and the right half are also provided with separators connected to adjacent separators; the separators in the left half are spaced apart from each other; the separators in the right half are staggered with the separators in the left half; the first feed pipe is connected to the left half; the second feed pipe is connected to the right half.

[0009] Furthermore, the storage tank includes a first storage tank connected to the first feed pipe and a second storage tank connected to the second feed pipe.

[0010] Furthermore, the neutralization kettle comprises a first neutralization kettle and a second neutralization kettle.

[0011] Furthermore, a feed inlet and a reflux inlet are respectively provided at the top of the neutralization kettle; and an outlet is provided at the bottom of the neutralization kettle.

[0012] Furthermore, the feed inlet of the first neutralization kettle and the feed inlet of the second neutralization kettle are connected to the static mixing mechanism through a pipeline.

[0013] Furthermore, the reflux port of the first neutralization kettle and the reflux port of the second neutralization kettle are connected to the discharge port of the filtering mechanism through a pipeline.

[0014] Furthermore, the outlet of the first neutralization kettle and the outlet of the second neutralization kettle are connected to the inlet of the filtering mechanism through a pipeline.

[0015] Furthermore, the static mixing and neutralization device for producing sodium benzoate also includes: a first pressure pump arranged on the pipeline connecting the first storage tank and the first feed pipe, a second pressure pump arranged on the pipeline connecting the second storage tank and the second feed pipe, a salt circulation pump arranged on the pipeline connecting the outlet of the neutralization kettle and the filtering mechanism, a first pH meter arranged on the pipeline connecting the static mixing mechanism and the feed port of the neutralization kettle, and a second pH meter arranged on the pipeline connecting the outlet of the neutralization kettle and the filtering mechanism; the second pH meter is located between the salt circulation pump and the filtering mechanism.

[0016] Furthermore, the horizontal heights of the first feeding pipe and the second feeding pipe are staggered.

[0017] Furthermore, the filtering mechanism includes several groups of carbon fiber filters.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model provides a static mixing and neutralizing device for sodium benzoate production, which comprises a static mixing mechanism arranged between a storage tank and a neutralizing kettle, wherein a plurality of rows of separators arranged in a three-dimensional matrix and staggered with each other are arranged in the mixing mechanism, and the separators in the first row are arranged to be divided into a left half and a right half after a baffle is arranged on the separators in the first row, and a separator connected to an adjacent separator is arranged in an interval and staggered manner in the left half and the right half; thus, when the liquid materials in the first feeding pipe and the second feeding pipe enter the left half and the right half respectively under the action of a pressure pump, the two streams of materials will first be divided into many micron-level liquid layers by the separators and the separators in the left half and the right half respectively, and continue to flow backward; and because the separators between the adjacent rows in the subsequent process are horizontally staggered with each other, the liquid layers of the two streams of materials are staggered with each other, so that the two streams of materials will be continuously divided-mixed-divided-mixed in the process of backward turbulence, thereby achieving the purpose of sufficient mixing in a short time; and the volume and liquid holding capacity of the reaction system are relatively small, so that the investment cost and danger of production are greatly reduced.

[0020] 2. The utility model provides a static mixing and neutralization device for the production of sodium benzoate. By setting up several neutralization kettles and filtering mechanisms containing several groups of carbon fiber filters, it is more conducive to production regulation and control, and can avoid production stoppage losses due to maintenance when the machine is damaged. The pH of the pre-reaction solution is measured by installing a first pH meter on the pipeline connecting the static mixing mechanism and the feed port of the neutralization kettle; the pH value of the neutralization reaction solution is measured by installing a second pH meter on the pipeline connecting the outlet of the neutralization kettle and the filtering mechanism; thereby, the feed ratio of each raw material and the uniformity of mixing can be adjusted according to the pH value change of the pH meter to ensure the normal reaction of benzoic acid and sodium hydroxide. The utility model significantly improves the overall practicality and efficiency of the static mixing and neutralization device for the production of sodium benzoate through design. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model provides a schematic diagram of the overall structure of a static mixing and neutralization device for producing sodium benzoate.

[0022] Figure 2 The utility model provides a schematic structural diagram of a mixing mechanism in a static mixing and neutralization device for producing sodium benzoate.

[0023] Figure 3 The utility model provides a schematic structural diagram of a mixing mechanism in a static mixing and neutralization device for producing sodium benzoate.

[0024] Reference numerals

[0025] 11-first storage tank; 12-second storage tank; 21-first feed pipe; 22-second feed pipe; 23-mixing mechanism; 231-separator; 232-baffle; 233-partition; 31-first neutralization kettle; 32-second neutralization kettle; 33-feed port; 34-reflux port; 35-export; 4-filtering mechanism; 41-carbon fiber filter; 5-finished product storage tank; 611-first pressure pump; 612-second pressure pump; 62-salt circulation pump; 71-first pH meter; 72-second pH meter; 8-control valve. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0028] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0029] like Figure 1 As shown, the utility model provides a static mixing and neutralization device for sodium benzoate production, comprising: a storage tank, a static mixing mechanism connected to the storage tank, a neutralization kettle connected to the static mixing mechanism, a filtering mechanism 4 connected to the neutralization kettle, and a finished product storage tank 5 connected to the filtering mechanism 4;

[0030] The static mixing mechanism includes a mixing mechanism 23, a first feed pipe 21 and a second feed pipe 22 respectively connected to one end of the mixing mechanism 23; the first feed pipe 21 and the second feed pipe 22 are arranged at staggered levels.

[0031] The mixing mechanism 23 is provided with a plurality of rows of partitions 231 arranged in a three-dimensional matrix; the partitions 231 are staggered with each other; the surfaces of the partitions 231 are arranged opposite to each other; a baffle 232 is provided on the first row of partitions 231 close to one end of the first feed pipe 21 and the second feed pipe 22; the first row of partitions 231 is perpendicular to the baffle 232; the baffle 232 divides the first row of partitions 231 into a left half and a right half; the left half and the right half are also provided with partitions 233 connected to the surfaces of adjacent partitions 231; the baffle 232 is located on one side of the partition 233; the partitions 233 in the left half are spaced apart from each other; the partitions 233 in the right half are staggered with the partitions 233 in the left half; the first feed pipe 21 is connected to the left half; the second feed pipe 22 is connected to the right half.

[0032] With such an arrangement, when the liquid materials of the first feed pipe 21 and the second feed pipe 22 enter the left half and the right half respectively under the action of pressure, the two streams of material will first be divided into many micron-sized liquid layers by the dividing sheets 231 and the partitions 233 in the left half and the right half respectively, and continue to flow backwards; and because the dividing sheets 231 between two adjacent rows in the subsequent process are horizontally staggered with each other, the liquid layers of the two streams of material are intertwined with each other, so the two streams of material will be continuously divided-mixed-divided-mixed in the process of backward turbulence, thereby achieving the purpose of sufficient mixing in a short time; and the volume and liquid holding capacity of the reaction system are relatively small, so that the investment cost and risk of production are greatly reduced.

[0033] Specifically, in some embodiments of the present invention, the material storage tank includes a first material storage tank 11 connected to the first feeding pipe 21 and a second material storage tank 12 connected to the second feeding pipe 22 .

[0034] The neutralization kettle includes a first neutralization kettle 31 and a first neutralization kettle 32. A feed port 33 and a reflux port 34 are respectively provided at the top of the neutralization kettle; an outlet 35 is provided at the bottom of the neutralization kettle. The feed port 33 of the first neutralization kettle 31 and the feed port 33 of the first neutralization kettle 32 are connected to the static mixing mechanism through a pipeline. The reflux port 34 of the first neutralization kettle 31 and the reflux port 34 of the first neutralization kettle 32 are connected to the discharge port of the filtering mechanism 4 through a pipeline. The outlet 35 of the first neutralization kettle 31 and the outlet 35 of the first neutralization kettle 32 are connected to the inlet of the filtering mechanism 4 through a pipeline.

[0035] The filtering mechanism 4 includes a plurality of groups of carbon fiber filters 41 .

[0036] Such a setting can be more conducive to production regulation and control, avoiding production stoppage losses due to maintenance when the machine is damaged. In addition, the several neutralization kettles can achieve continuous and stable discharge, thereby greatly increasing production capacity.

[0037] Specifically, in some embodiments of the present invention, the static mixing and neutralization device for producing sodium benzoate also includes: a first pressure pump 611 arranged on the pipeline connecting the first storage tank 11 and the first feed pipe 21, a second pressure pump 612 arranged on the pipeline connecting the second storage tank 12 and the second feed pipe 22, a salt circulation pump 62 arranged on the pipeline connecting the outlet 35 of the neutralization kettle and the filtering mechanism 4, a first pH meter 71 arranged on the pipeline connecting the static mixing mechanism and the feed port 33 of the neutralization kettle, and a second pH meter 72 arranged on the pipeline connecting the outlet 35 of the neutralization kettle and the filtering mechanism 4; the second pH meter 72 is located between the salt circulation pump 62 and the filtering mechanism 4.

[0038] With such arrangement, the feed ratio of each raw material can be adjusted first according to the change of the pH value of the first pH meter 71; and when the neutralization kettle is discharged, the pH value of the second pH meter 72 can be used to judge after the discharged solution is decolorized and removed by the filtering mechanism 4: if the pH reaches the qualified range, that is, the solution is transported to the finished product tank after being decolorized and removed by the filtering mechanism 4; and when there is still a small deviation in the pH value of the solution, the solution is circulated back to the neutralization kettle, and the reaction time and the feed ratio are increased to ensure the complete reaction of benzoic acid and sodium hydroxide.

[0039] The static mixing and neutralization device for producing sodium benzoate provided by the utility model is specifically described below in conjunction with the embodiments.

[0040] Example 1

[0041] like Figure 1-3As shown, the utility model provides a static mixing and neutralization device for producing sodium benzoate, comprising: a storage tank, a static mixing mechanism connected to the storage tank, a neutralization kettle connected to the static mixing mechanism, a filtering mechanism 4 connected to the neutralization kettle, a finished product storage tank 5 connected to the filtering mechanism 4, a first pressure pump 611 arranged on a pipeline for connecting the first storage tank 11 and the first feed pipe 21, a second pressure pump 612 arranged on a pipeline for connecting the second storage tank 12 and the second feed pipe 22, a salt circulation pump 62 arranged on a pipeline for connecting the outlet 35 of the neutralization kettle and the filtering mechanism 4, a first pH meter 71 arranged on a pipeline for connecting the static mixing mechanism and the feed port 33 of the neutralization kettle, and a second pH meter 72 arranged on a pipeline for connecting the outlet 35 of the neutralization kettle and the filtering mechanism 4; the second pH meter 72 is located between the salt circulation pump 62 and the filtering mechanism 4; a control valve 8 is arranged on the pipeline for transporting the product to the finished product storage tank 5.

[0042] The static mixing mechanism includes a mixing mechanism 23, a first feed pipe 21 and a second feed pipe 22 respectively connected to one end of the mixing mechanism 23; the first feed pipe 21 and the second feed pipe 22 are arranged at staggered levels.

[0043] The mixing mechanism 23 is provided with a plurality of rows of partitions 231 arranged in a three-dimensional matrix; the partitions 231 are staggered with each other; the surfaces of the partitions 231 are arranged opposite to each other; a baffle 232 is provided on the first row of partitions 231 close to one end of the first feed pipe 21 and the second feed pipe 22; the first row of partitions 231 is perpendicular to the baffle 232; the baffle 232 divides the first row of partitions 231 into a left half and a right half; the left half and the right half are also provided with partitions 233 connected to the surfaces of adjacent partitions 231; the baffle 232 is located on one side of the partition 233; the partitions 233 in the left half are spaced apart from each other; the partitions 233 in the right half are staggered with the partitions 233 in the left half; the first feed pipe 21 is connected to the left half; the second feed pipe 22 is connected to the right half. The storage tank includes a first storage tank 11 connected to the first feeding pipe 21 and a second storage tank 12 connected to the second feeding pipe 22; the first storage tank 11 is used to store sodium hydroxide solution, and the second storage tank 12 is used to store sodium benzoate solution.

[0044] The neutralization kettle includes a first neutralization kettle 31 and a first neutralization kettle 32. A feed port 33 and a reflux port 34 are respectively provided on the top of the neutralization kettle; control valves 8 are respectively provided on the pipelines for conveying materials to the feed port 33 or refluxing materials to the reflux port 34; an outlet 35 is provided at the bottom of the neutralization kettle. The feed port 33 of the first neutralization kettle 31 and the feed port 33 of the first neutralization kettle 32 are connected to the static mixing mechanism through a pipeline. The reflux port 34 of the first neutralization kettle 31 and the reflux port 34 of the first neutralization kettle 32 are connected to the discharge port of the filtering mechanism 4 through a pipeline. The outlet 35 of the first neutralization kettle 31 and the outlet 35 of the first neutralization kettle 32 are connected to the inlet of the filtering mechanism 4 through a pipeline.

[0045] The filtering mechanism 4 includes two groups of carbon fiber filters 41 , and during operation, only one group of the carbon fiber filters 41 is activated.

[0046] The following is a description of the working process of a static mixing neutralization device for sodium benzoate production provided by the utility model:

[0047] like Figure 1-3 First, open the control valve 8 on the storage tank, and transport the sodium hydroxide solution in the first storage tank 11 and the sodium benzoate solution in the second storage tank 12 to the static mixing mechanism according to the target ratio under the action of the pressure pump. The two streams of material will be first divided into many micron-sized liquid layers by the partitions 231 and the partitions 233 in the left and right halves, respectively, and continue to flow backward; and because the partitions 231 between the two adjacent rows in the subsequent process are horizontally staggered with each other, the liquid layers of the two streams of material are intertwined with each other, so the two streams of material will be continuously divided-mixed-divided-mixed in the process of backward turbulence, so as to be fully mixed in a short time; after the liquid materials are mixed, they are pre-judged by the first pH meter 71. If the pH value of the mixed liquid material is not within the qualified range, the mixing time or the material delivery ratio in the storage tank is adjusted; if ... When the H value reaches the qualified range, the mixed liquid is transported to the first neutralization kettle 31 or the first neutralization kettle 32, and is transported to the filtering mechanism 4 for color removal and impurity removal through the salt circulation pump 62; wherein, if the pH value of the second pH meter 72 on the pipeline connecting the salt circulation pump 62 and the filtering mechanism 4 is also within the qualified range, the control valve 8 on the pipeline entering the finished product storage tank 5 can be opened to transport the color-removed and impurity-removed liquid to the finished product storage tank 5 for use in the next process; if the pH value of the second pH meter 72 is not within the qualified range, the control valve 8 on the pipeline entering the finished product storage tank 5 is closed, and at the same time, the control valve 8 on the pipeline refluxed to the reflux port 34 of the neutralization kettle is opened, and the color-removed and impurity-removed liquid is circulated back to the reflux port 34 of the neutralization kettle, and the reaction time or feed ratio is increased according to the actual situation to continue the reaction.

[0048] In summary, the utility model provides a static mixing and neutralization device for the production of sodium benzoate, by arranging a static mixing mechanism between a storage tank and a neutralization kettle, wherein a plurality of rows of separators arranged in a three-dimensional matrix and staggered with each other are arranged in the mixing mechanism, and the separators in the first row are arranged to be divided into a left half and a right half after a baffle is arranged on the separators, and in addition, separators connected to adjacent separators are arranged at intervals and staggered in the left half and the right half; in this way, when the liquid materials of the first feed pipe and the second feed pipe enter the left half and the right half respectively under the action of a pressure pump, the two streams of material will first be divided into many micron-level liquid layers by the separators and the separators 233 in the left half and the right half respectively, and continue to flow backward; and because the separators between the adjacent rows in the subsequent process are horizontally staggered with each other, the liquid layers of the two streams of material are staggered with each other, so that the two streams of material will be continuously divided-mixed-divided-mixed in the process of backward turbulence, thereby achieving the purpose of sufficient mixing in a short time; and the volume and liquid holding capacity of the reaction system are relatively small, so that the investment cost and danger of production are greatly reduced. By setting up several neutralization kettles and filtering mechanisms 4 containing several groups of carbon fiber filters 41, it is more conducive to production regulation and control, and can avoid production stoppage losses caused by maintenance when the machine is damaged. The pH of the pre-reaction solution is measured by installing a first pH meter 71 on the pipeline used to connect the static mixing mechanism and the feed port 33 of the neutralization kettle; the pH value of the neutralization reaction solution is measured by installing a second pH meter 72 on the pipeline used to connect the outlet 35 of the neutralization kettle and the filtering mechanism 4; thus, the feed ratio of each raw material and the uniformity of mixing can be adjusted according to the pH value change of the pH meter to ensure the normal reaction of benzoic acid and sodium hydroxide. The utility model significantly improves the overall practicality and efficiency of the static mixing neutralization device used for the production of sodium benzoate through design.

[0049] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A static mixing neutralization device for the production of sodium benzoate, characterized in that: include: A material storage tank, a static mixing mechanism connected to the material storage tank, a neutralization kettle connected to the static mixing mechanism, a filtering mechanism connected to the neutralization kettle, and a finished product storage tank connected to the filtering mechanism; The static mixing mechanism comprises a mixing mechanism, a first feed pipe and a second feed pipe respectively connected to one end of the mixing mechanism; The mixing mechanism is provided with several rows of separators arranged in a three-dimensional matrix; the separators are staggered with each other; a baffle is provided on the first row of separators close to one end of the first feed pipe and the second feed pipe; the first row of separators is perpendicular to the baffle; the baffle divides the first row of separators into a left half and a right half; the left half and the right half are both provided with separators connecting adjacent separators; the separators in the left half are spaced apart from each other; the separators in the right half are staggered with the separators in the left half; the first feed pipe is connected to the left half; the second feed pipe is connected to the right half.

2. The static mixing neutralization device for producing sodium benzoate according to claim 1, characterized in that: The storage tank includes a first storage tank communicated with the first feed pipe and a second storage tank communicated with the second feed pipe.

3. The static mixing neutralization device for producing sodium benzoate according to claim 2, characterized in that: The neutralization kettle comprises a first neutralization kettle and a second neutralization kettle.

4. The static mixing neutralization device for producing sodium benzoate according to claim 3, characterized in that: The top of the neutralization kettle is respectively provided with a feed inlet and a reflux inlet; the bottom of the neutralization kettle is respectively provided with an outlet.

5. The static mixing neutralization device for producing sodium benzoate according to claim 4, characterized in that: The feed inlet of the first neutralization kettle and the feed inlet of the second neutralization kettle are connected to the static mixing mechanism through a pipeline.

6. The static mixing neutralization device for producing sodium benzoate according to claim 4, characterized in that: The reflux port of the first neutralization kettle and the reflux port of the second neutralization kettle are connected to the discharge port of the filtering mechanism through a pipeline.

7. The static mixing neutralization device for producing sodium benzoate according to claim 4, characterized in that: The outlet of the first neutralization kettle and the outlet of the second neutralization kettle are connected to the inlet of the filtering mechanism through a pipeline.

8. The static mixing neutralization device for producing sodium benzoate according to claim 4, characterized in that: Also includes: A first pressure pump is arranged on the pipeline connecting the first storage tank and the first feed pipe, a second pressure pump is arranged on the pipeline connecting the second storage tank and the second feed pipe, a salt circulation pump is arranged on the pipeline connecting the outlet of the neutralization kettle and the filtering mechanism, a first pH meter is arranged on the pipeline connecting the static mixing mechanism and the feed port of the neutralization kettle, and a second pH meter is arranged on the pipeline connecting the outlet of the neutralization kettle and the filtering mechanism; the second pH meter is located between the salt circulation pump and the filtering mechanism.

9. The static mixing neutralization device for producing sodium benzoate according to claim 1, characterized in that: The first feeding pipe and the second feeding pipe are arranged at staggered levels.

10. The static mixing neutralization device for sodium benzoate production according to claim 1, characterized in that: The filtering mechanism includes several groups of carbon fiber filters.

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