Sodium formate concentration process

Abstract

The invention provides a sodium formate concentration process, and relates to the technical field of chemical production. The method comprises the following steps: firstly, reacting by using a sodium hydrosulfite sodium formate device to generate a sodium formate solution; secondly, the sodium formate solution is evaporated and concentrated and then conveyed into a concentrated material tank; conveying the concentrated sodium formate solution to the sodium formate preparation kettle by using a concentrated material pump through a conveying pipeline; and finally, proportioning in a sodium formate preparation kettle to meet the requirements of sodium formate suspension liquid content and water content required by sodium hydrosulfite production. Automatic operation of a sodium formate batching post is achieved, remote operation of concentrated sodium formate solution pipeline conveying configuration is achieved, and manual field control of operators is not needed; the labor cost is reduced; and no solid material or dust exists on the sodium formate preparation kettle site, and the site environment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production, and in particular to a sodium formate concentration process. Background Art

[0002] Hydrosulfite (Na 2 S 2 O 4 ) is a strong reducing agent, mainly used as a printing and dyeing auxiliary, fabric bleaching agent, pulp bleaching agent, preservative for some foods and reducing agent in the manufacturing process of some chemicals. The earliest production process of hydrosulfite was the zinc powder method, followed by the sodium amalgam method, sodium formate method and sodium hydride method. Among them, the sodium formate method has developed the fastest and is now in the mainstream both at home and abroad. The basic reaction of hydrosulfite production by sodium formate is expressed as: HCOONa+NaOH+2SO 2 →Na 2 S 2 O 4 +CO 2 +HO 2 It can be seen that preparing a sodium formate solution that meets the requirements is one of the key processes of the preparation method.

[0003] In the related art, a feasible sodium formate solution preparation process can be described as follows: the original design of the sodium formate device in the sodium formate workshop uses the first-phase synthetic ammonia liquid nitrogen to wash the CO-containing waste gas and react with sodium hydroxide solution under certain temperature and pressure conditions to generate sodium formate solution, and then produces wet sodium formate after evaporation, centrifugation and packaging. The wet sodium formate has a water content of about 2%. The wet sodium formate after centrifugation and packaging is transported to the sodium formate raw material batching station by a forklift, and then the worker opens the manhole of the sodium formate preparation kettle and pours the wet sodium formate into the preparation kettle. At the same time, an appropriate amount of industrial water needs to be added to the sodium formate preparation kettle during the preparation process.

[0004] However, the sodium formate solution is evaporated, centrifuged and packaged to obtain wet sodium formate, and the process has many steps and requires a large amount of electricity and steam. The wet sodium formate needs to be manually transported to the sodium formate raw material batching station for the preparation of sodium formate suspension, which is time-consuming and labor-intensive and does not meet the needs of automated production of sodium formate. In addition, the wet sodium formate has a low water content and does not meet the requirements for the preparation of the sodium formate suspension. Industrial water needs to be added again, which will consume a large amount of industrial water. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides a sodium formate concentration process, which solves the technical problems that the process has many operation steps, is time-consuming and labor-intensive, does not meet the needs of automatic production of sodium formate, and consumes a large amount of industrial water.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A sodium formate concentration process, comprising:

[0010] S1, using sodium formate device to generate sodium formate solution by reaction;

[0011] S2, evaporating and concentrating the sodium formate solution and then transporting it into a concentrate tank;

[0012] S3, using a concentrated material pump to transport the concentrated sodium formate solution to the sodium formate preparation kettle through a delivery pipeline;

[0013] S4. Mixing the ingredients in the sodium formate preparation kettle to meet the requirements of sodium formate suspension content and water content required for the production of sodium hydrosulfite.

[0014] Preferably, the sodium formate concentration process further comprises:

[0015] S5. After each batch of ingredients is prepared, steam is introduced into the sodium formate preparation kettle through a steam purge pipe.

[0016] Preferably, a flow meter is installed on the delivery pipeline.

[0017] Preferably, the basic reaction for generating the sodium formate solution in S1 is expressed as: CO+NaOH→HCOONa.

[0018] Preferably, in S2, the concentrated sodium formate solution in the concentrate tank is sampled and analyzed for sodium formate content.

[0019] Preferably, in S3, a single concentrated material pump is used to transport the concentrated sodium formate solution to the two sodium formate preparation kettles through a delivery pipeline.

[0020] (III) Beneficial effects

[0021] The present invention provides a sodium formate concentration process. Compared with the prior art, it has the following advantages:

[0022] Beneficial effects:

[0023] In the present invention, firstly, sodium formate solution is generated by reaction of sodium formate powder device; secondly, sodium formate solution is evaporated, concentrated and then transported into concentrated material tank; again, concentrated material pump is used to transport concentrated sodium formate solution to sodium formate preparation kettle through conveying pipeline; finally, batching is performed in sodium formate preparation kettle to meet the requirements of sodium formate suspension content and water content required for sodium formate production. The sodium formate batching post is automated, and the concentrated sodium formate solution pipeline conveying configuration is remotely operated without manual control by operators on site; the labor cost is reduced; and solid materials and dust are eliminated on site of sodium formate preparation kettle, thereby improving the on-site environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of an apparatus for a sodium formate concentration process provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The embodiment of the present application provides a sodium formate concentration process, which solves the technical problems that the process has many operation steps, is time-consuming and labor-intensive, does not meet the needs of automated production of sodium hydrosulfite, and consumes a large amount of industrial water.

[0028] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0029] 1. In order to reduce labor costs, under normal production conditions, the sodium formate centrifugation process is no longer produced, and manual packaging and forklift transportation are no longer required on site;

[0030] 2. In order to improve the on-site environment, the sodium formate batching station of the main device no longer needs to open and seal the lid manually. There is no solid material and dust at the sodium formate preparation kettle site, and the on-site environment is clean and tidy;

[0031] 3. Realize the automated operation of sodium formate batching, and the concentrated sodium formate pipeline transportation configuration can be remotely operated without the need for on-site manual control by operators.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Example:

[0034] like Figure 1 As shown, Figure 1The schematic diagram of the equipment of the sodium formate concentration process provided by the embodiment of the present invention is shown. Correspondingly, the embodiment of the present invention provides a sodium formate concentration process, comprising:

[0035] S1, using sodium formate device to generate sodium formate solution by reaction;

[0036] S2, evaporating and concentrating the sodium formate solution and then transporting it into a concentrate tank;

[0037] S3, using a concentrated material pump to transport the concentrated sodium formate solution to the sodium formate preparation kettle through a delivery pipeline;

[0038] S4. Mixing the ingredients in the sodium formate preparation kettle to meet the requirements of sodium formate suspension content and water content required for the production of sodium hydrosulfite.

[0039] The embodiment of the present invention realizes the automated operation of the sodium formate batching post, and the concentrated sodium formate solution pipeline transportation configuration realizes remote operation without the need for on-site manual control by operators; the labor cost is reduced; and the sodium formate preparation kettle site is free of solid materials and dust, thereby improving the on-site environment.

[0040] In an optional embodiment, the basic reaction for generating the sodium formate solution in S1 is expressed as: CO+NaOH→HCOONa.

[0041] In an optional embodiment, in order to meet the sodium formate suspension content and water content requirements for the production of sodium hydrosulfite, the concentrated sodium formate solution in the concentrate tank is sampled and analyzed for sodium formate content in S2 to adjust the evaporation concentration temperature and pressure so that the evaporation concentration endpoint meets the production requirements of sodium hydrosulfite.

[0042] In an optional embodiment, if Figure 1 As shown, in S3, a single concentrated material pump is used to transport the concentrated sodium formate solution to two sodium formate preparation kettles through a transport pipeline.

[0043] In an optional embodiment, in order to avoid clogging of the delivery pipeline, the sodium formate concentration process provided by the embodiment of the present invention further includes:

[0044] S5. After each batch of ingredients is prepared, steam is introduced into the sodium formate preparation kettle through a steam purge pipe.

[0045] It can be understood that the embodiments of the present invention recognize that concentrated sodium formate solution is easy to clog the pipeline, and it is necessary to purge the pipeline after the transportation is completed, control the purge time and the pipeline temperature rise during purge, judge the purge endpoint, and prevent excessive purge from causing the concentrated sodium formate solution to agglomerate in the pipeline.

[0046] In particular, in order to calculate the amount of concentrated sodium formate solution required for each batch of materials according to the weight of sodium formate required for the production of insurance powder, a flow meter is added to the conveying pipeline to complete the metering of the concentrated sodium formate solution for each batch of materials. In an optional embodiment, the embodiment of the present invention also has a flow meter installed on the conveying pipeline.

[0047] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0048] 1. After the implementation of the project, the environment at the sodium formate packaging site and the sodium formate configuration kettle site has been fundamentally improved. There is no dust accumulation on site and the ground remains dry and clean.

[0049] 2. After implementation, the sodium formate process no longer requires labor packaging, and the sodium formate configuration kettle no longer requires labor unloading. Currently, the sodium formate packaging fee is 28 yuan / ton, and the sodium formate unloading fee is 22 yuan / ton. The labor cost can be reduced throughout the year: (28+22)*45000=2.25 million yuan.

[0050] 3. After implementation, the centrifuge of the sodium formate device will no longer be turned on under normal circumstances, which can reduce the centrifuge opening time by 15 hours per day. The centrifuge power is 85kw, and the annual power electricity cost can be reduced by: 15*330*85*0.6=252,000 yuan.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sodium formate concentration process, characterized in that: include: S1, using sodium formate device to generate sodium formate solution by reaction; S2, evaporating and concentrating the sodium formate solution and then transporting it into a concentrate tank; S3, using a concentrated material pump to transport the concentrated sodium formate solution to the sodium formate preparation kettle through a delivery pipeline; S4. Mixing the ingredients in the sodium formate preparation kettle to meet the requirements of sodium formate suspension content and water content required for the production of sodium hydrosulfite.

2. The sodium formate concentration process according to claim 1, wherein: Also includes: S5. After each batch of ingredients is prepared, steam is introduced into the sodium formate preparation kettle through a steam purge pipe.

3. The sodium formate concentration process according to claim 1 or 2, wherein: A flow meter is installed on the delivery pipeline.

4. The sodium formate concentration process according to claim 1 or 2, wherein: The basic reaction for generating the sodium formate solution in S1 is expressed as: CO+NaOH→HCOONa.

5. The sodium formate concentration process according to claim 1 or 2, wherein: In S2, the concentrated sodium formate solution in the concentrate tank is sampled and analyzed for sodium formate content.

6. The sodium formate concentration process according to claim 1 or 2, wherein: In S3, a single concentrated material pump is used to transport the concentrated sodium formate solution to two sodium formate preparation kettles through a delivery pipeline.

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