A sodium acetate and sodium acetate trihydrate production device

Abstract

The application discloses a sodium acetate and sodium acetate trihydrate production device, which comprises a reaction system, an evaporation system, a crystallization system and a drying system. The reaction system is used for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution. The evaporation system is connected with the reaction system and is used for evaporating and concentrating the sodium acetate solution. The crystallization system is connected with the evaporation system and is used for crystallizing the sodium acetate solution after evaporation and concentration to prepare sodium acetate trihydrate. The drying system is connected with an outlet pipeline of the filter, and is used for drying the solid in the sodium acetate solution after evaporation, concentration and dehydration and the solid of the sodium acetate trihydrate after crystallization and filtration to prepare sodium acetate product and sodium acetate trihydrate product. The sodium acetate and sodium acetate trihydrate production device can simultaneously meet the demand of producing sodium acetate product and sodium acetate trihydrate product, and can timely adjust the production of the sodium acetate product and the sodium acetate trihydrate product according to actual production demand.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sodium acetate and sodium acetate trihydrate production, and particularly relates to a sodium acetate and sodium acetate trihydrate production device. BACKGROUND

[0002] As common chemical raw materials, sodium acetate and sodium acetate trihydrate are mainly produced by evaporation crystallization in industrial production. A traditional evaporation crystallization device mainly comprises an evaporation system, a crystallization tank and a heating device, and its working principle is as follows: power steam enters the evaporation system to evaporate and concentrate the material, the concentrated material is respectively loaded into two or more than two cooling crystallization tanks, and cooling water is introduced into the jacket of the cooling crystallization tank to cool and crystallize the material. The whole production process includes feeding, cooling and discharging operations, and the production steps are manually operated in an intermittent manner. The manual operation has the disadvantages of high labor intensity, high equipment operation cost, unstable product quality, low production efficiency and low heat utilization rate.

[0003] Sodium acetate and sodium acetate trihydrate are two different forms of sodium acetate, and their production processes have certain similarities, but the post-processing has significant differences, which leads to the fact that sodium acetate and sodium acetate trihydrate cannot be produced simultaneously on one production line.

[0004] Therefore, how to design a production device to simultaneously produce sodium acetate and sodium acetate trihydrate is a technical problem to be solved by those skilled in the art at present. SUMMARY

[0005] Therefore, how to design a production device to simultaneously produce sodium acetate and sodium acetate trihydrate is a technical problem to be solved by those skilled in the art at present.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A sodium acetate and sodium acetate trihydrate production device for preparing sodium acetate and sodium acetate trihydrate products, comprising:

[0008] A reaction system for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution;

[0009] An evaporation system connected with the reaction system for evaporating and concentrating the sodium acetate solution;

[0010] A crystallization system connected to the evaporation system, for crystallizing the concentrated sodium acetate solution to produce sodium acetate trihydrate; the crystallization system comprises a sodium acetate crystallization pump, a crystallizer and a filter, the outlet of the sodium acetate crystallization pump is connected to the inlet of the crystallizer, and the inlet of the filter is connected to the outlet of the crystallizer; a first bypass pipe is arranged between the sodium acetate crystallization pump and the filter, and a first bypass valve is arranged on the first bypass pipe.

[0011] A drying system connected to the outlet pipe of the filter, for drying the solid in the concentrated and dehydrated sodium acetate solution and the solid of the crystallized and filtered sodium acetate trihydrate to produce the sodium acetate product and the sodium acetate trihydrate product.

[0012] Optionally, in the above sodium acetate and sodium acetate trihydrate production device, the reaction system comprises:

[0013] A sodium hydroxide storage tank for storing the sodium hydroxide solution, the outlet of the sodium hydroxide storage tank is connected to the inlet of the lye pump, and the lye pump is used to transport the sodium hydroxide solution;

[0014] An acetic acid storage tank for storing the acetic acid solution, the outlet of the acetic acid storage tank is connected to the inlet of the acetic acid pump, and the acetic acid pump is used to transport the acetic acid solution;

[0015] A reaction kettle, the outlet of the lye pump is connected to the inlet of the reaction kettle, the outlet of the acetic acid pump is connected to the inlet of the reaction kettle, and the sodium hydroxide solution and the acetic acid solution react in the reaction kettle to generate the sodium acetate solution;

[0016] A decolorization and filtration device, the inlet of the decolorization and filtration device is connected to the outlet of the reaction kettle, and the decolorization and filtration device is used to decolorize and filter the sodium acetate solution.

[0017] Optionally, in the above sodium acetate and sodium acetate trihydrate production device, a first shut-off valve is arranged on the outlet pipe of the lye pump, and a second shut-off valve is arranged on the outlet pipe of the acetic acid pump.

[0018] Optionally, in the above sodium acetate and sodium acetate trihydrate production device, the evaporation system comprises:

[0019] A sodium acetate solution storage tank, the inlet of the sodium acetate solution storage tank is connected to the outlet of the decolorization and filtration device, and the sodium acetate solution storage tank is used to store the sodium acetate solution;

[0020] A sodium acetate solution pump, the inlet of the sodium acetate solution pump is connected to the outlet of the sodium acetate solution storage tank;

[0021] a heater, an inlet of the heater being communicated with an outlet of the sodium acetate solution pump;

[0022] an evaporator, an inlet of the evaporator being communicated with an outlet of the heater.

[0023] Optionally, in the sodium acetate and sodium acetate trihydrate production device, the heater comprises a first heater and a second heater;

[0024] the evaporator comprises a first evaporator and a second evaporator;

[0025] an inlet of the first heater is communicated with an outlet of the sodium acetate solution pump, for heating the sodium acetate solution; an inlet of the first evaporator is communicated with an outlet of the first heater, for evaporating and concentrating the sodium acetate solution; an inlet of the second heater is communicated with an outlet of the first evaporator, and a sodium acetate concentrated solution pump is arranged between the first evaporator and the second heater; an inlet of the second evaporator is communicated with an outlet of the second heater, for further evaporating and concentrating the sodium acetate solution.

[0026] Optionally, in the sodium acetate and sodium acetate trihydrate production device, a steam outlet of the first evaporator is communicated with an inlet of a booster, and an outlet of the booster is communicated with an inlet of the second heater, and the steam is used as a heating source of the second heater.

[0027] Optionally, in the sodium acetate and sodium acetate trihydrate production device, the crystallization system is provided with a crystallizer circulating pump, which is used to transport the crystallized material back to the crystallizer.

[0028] Optionally, in the sodium acetate and sodium acetate trihydrate production device, the drying system comprises:

[0029] a fluidized bed dryer, which is communicated with an outlet of the filter, for drying the solid passing through the filter;

[0030] a screening machine, an inlet of the screening machine being communicated with an outlet of the fluidized bed dryer, for screening the dried sodium acetate to produce the sodium acetate product;

[0031] a packaging machine, an inlet of the packaging machine being communicated with an outlet of the screening machine, and the inlet of the packaging machine is provided with a second bypass pipeline and a second bypass valve.

[0032] a scrubber, which is communicated with a gas outlet of the fluidized bed dryer, for scrubbing the gas discharged from the fluidized bed dryer.

[0033] Optionally, in the sodium acetate and sodium acetate trihydrate production device, an air heater is arranged between the secondary evaporator and the fluidized bed dryer, a steam outlet of the secondary evaporator is communicated with the air heater, and steam of the secondary evaporator is used to heat air entering the air heater; an air outlet of the air heater is communicated with the fluidized bed dryer.

[0034] Optionally, in the sodium acetate and sodium acetate trihydrate production device, a condensate liquid outlet of the secondary heater is communicated with the alkali dissolving tank, and a condensate liquid outlet of the air heater is communicated with the alkali dissolving tank.

[0035] The sodium acetate and sodium acetate trihydrate production device provided by the application comprises a reaction system, an evaporation system, a crystallization system and a drying system, wherein the reaction system is used for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution; the evaporation system is connected with the reaction system and is used for evaporating and concentrating the sodium acetate solution; the crystallization system is connected with the evaporation system and is used for crystallizing the sodium acetate solution after evaporation and concentration to produce sodium acetate trihydrate; the crystallization system comprises a sodium acetate crystallization pump, a crystallizer and a filter, an outlet of the sodium acetate crystallization pump is communicated with an inlet of the crystallizer, and an inlet of the filter is communicated with an outlet of the crystallizer; a first bypass pipe is arranged between the sodium acetate crystallization pump and the filter, and a first bypass valve is arranged on the first bypass pipe; and the drying system is connected with an outlet pipeline of the filter and is used for drying sodium acetate and sodium acetate trihydrate.

[0036] When the sodium acetate product is produced, the crystallization process is not needed, the crystallizer is not worked, the sodium hydroxide solution and the acetic acid solution generate the sodium acetate solution in the reaction system, the sodium acetate solution after evaporation and concentration in the evaporation system enters the filter through the first bypass pipe between the sodium acetate crystallization pump and the filter, and the sodium acetate product is generated after drying in the drying system.

[0037] When the sodium acetate trihydrate product is produced, the sodium hydroxide solution and the acetic acid solution generate the sodium acetate solution in the reaction system, the sodium acetate solution after evaporation and concentration in the evaporation system enters the crystallizer to produce the sodium acetate trihydrate, and the sodium acetate trihydrate product is generated after drying in the drying system.

[0038] The sodium acetate and sodium acetate trihydrate production device provided by the application can simultaneously meet the needs of producing the sodium acetate product and the sodium acetate trihydrate product, can timely adjust the production of the sodium acetate product and the sodium acetate trihydrate product according to actual production needs, can timely adjust the production scale according to market conditions, has low processing and manufacturing cost, and is convenient to install and disassemble. Meanwhile, the sodium acetate and sodium acetate trihydrate production device provided by the application replaces the previous intermittent production mode of feeding, cooling and discharging by using the crystallization tank, stabilizes the feeding, cooling and discharging operations, helps to ensure the continuity and stability of product quality, reduces the labor intensity and improves the production efficiency. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the sodium acetate and sodium acetate trihydrate production apparatus disclosed in an embodiment of the present invention.

[0041] Figure 1 The meanings of the various reference numerals in the attached figures are as follows:

[0042] 100 is the reaction system, 110 is the sodium hydroxide storage tank, 120 is the acetic acid storage tank, 130 is the alkali pump, 140 is the acetic acid pump, 150 is the reaction vessel, and 160 is the decolorization and filtration device.

[0043] 200 is the evaporation system, 210 is the sodium acetate solution storage tank, 220 is the sodium acetate solution pump, 230 is the heater, 231 is the primary heater, 232 is the secondary heater, 240 is the evaporator, 241 is the primary evaporator, 242 is the secondary evaporator, 250 is the sodium acetate concentrate pump, and 260 is the booster.

[0044] 300 is the crystallization system, 310 is the sodium acetate crystallization pump, 320 is the crystallizer, 330 is the filter, 340 is the first bypass pipe, 341 is the first bypass valve, 350 is the crystallizer circulation pump, 360 is the air heater, and 370 is the return pump.

[0045] 400 is the drying system, 410 is the fluidized bed dryer, 420 is the screening machine, 430 is the packaging machine, 440 is the washer, 450 is the second bypass pipe, 451 is the second bypass valve, and 460 is the wastewater tank. Detailed Implementation

[0046] The core of this invention is to provide a sodium acetate and sodium acetate trihydrate production apparatus that can simultaneously produce both sodium acetate and sodium acetate trihydrate, thereby reducing labor intensity and improving production efficiency.

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] As Figure 1 shown in the drawings, the embodiment of the present application discloses a sodium acetate and sodium acetate trihydrate production device for preparing sodium acetate product and sodium acetate trihydrate product, which comprises a reaction system 100, an evaporation system 200, a crystallization system 300 and a drying system 400.

[0049] It should be noted that the sodium acetate here refers to anhydrous sodium acetate, which is referred to as sodium acetate for convenience in the following. The reaction system 100 is used for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution; the evaporation system 200 is connected with the reaction system 100 and is used for evaporating and concentrating the sodium acetate solution generated in the reaction system 100; the crystallization system 300 is connected with the evaporation system 200, and it should be noted that crystallization is needed when preparing sodium acetate trihydrate product, and crystallization is not needed when preparing sodium acetate product.

[0050] The crystallization system 300 comprises a sodium acetate crystallization pump 310, a crystallizer 320 and a filter 330, the outlet of the sodium acetate crystallization pump 310 is communicated with the inlet of the crystallizer 320, and the inlet of the filter 330 is communicated with the outlet of the crystallizer 320. In order to facilitate the non-operation of the crystallizer 320 when producing sodium acetate, a first bypass pipe 340 is arranged between the sodium acetate crystallization pump 310 and the filter 330, and a first bypass valve 341 is arranged on the first bypass pipe 340. In an embodiment of the present application, the filter 330 is a belt filter, and those skilled in the art can understand that other types of filters 330 can also be used, but it is necessary to ensure that the filtered solid cannot form large solid particles.

[0051] When preparing sodium acetate product, the crystallizer 320 does not work, sodium hydroxide solution and acetic acid solution generate sodium acetate solution in the reaction system 100, the sodium acetate solution is evaporated and concentrated by the evaporation system 200 and then directly enters the filter 330 for filtration through the first bypass pipe 340, and at this time, the first bypass valve 341 is in an open state. The filtered solid is directly sent to the drying system 400 for drying, and the sodium acetate product is prepared after drying.

[0052] In the preparation of sodium acetate trihydrate product, a crystallization process is needed. Sodium hydroxide solution and acetic acid solution generate sodium acetate solution in the reaction system 100. The sodium acetate solution is concentrated by the evaporation system 200, and then enters the crystallizer 320 through the sodium acetate crystallization pump 310. Cooling water is introduced into the jacket of the crystallizer 320 to reduce the temperature in the kettle, so that the sodium acetate solution crystallizes to generate sodium acetate trihydrate. The crystallized sodium acetate trihydrate enters the filter 330 for filtration, and the filtered solid is sent to the drying system 400 for drying to obtain the sodium acetate trihydrate product. The concentration process and the crystallization process of the sodium acetate solution are carried out in different devices, which improves the working capacity of the crystallizer 320. At the same time, the discharge mode of the crystallizer 320 is a solid-liquid mixture, which stabilizes the feeding, cooling and discharging operations, and helps to ensure the continuity and stability of the product quality.

[0053] The sodium acetate and sodium acetate trihydrate production device provided by the present application can simultaneously meet the demand for preparing sodium acetate product and sodium acetate trihydrate product, can timely adjust the production of sodium acetate product and sodium acetate trihydrate product according to actual production demand, can timely adjust the production scale according to market conditions, has low processing and manufacturing cost, and is convenient to install and disassemble. At the same time, the sodium acetate and sodium acetate trihydrate production device provided by the present application replaces the previous intermittent production mode of feeding, cooling and discharging of the crystallization tank, stabilizes the feeding, cooling and discharging operations, and helps to ensure the continuity and stability of the product quality, reduces the labor intensity and improves the production efficiency.

[0054] As shown in Figure 1 The reaction system 100 of the sodium acetate and sodium acetate trihydrate production device disclosed by the present application embodiment includes a sodium hydroxide storage tank 110, an acetic acid storage tank 120, a reaction kettle 150 and a decolorization filter device 160.

[0055] The sodium hydroxide storage tank 110 is used for storing sodium hydroxide solution, and the outlet of the sodium hydroxide storage tank 110 is communicated with the inlet of the lye pump 130. The lye pump 130 is used for conveying sodium hydroxide solution. Specifically, the lye pump 130 can adopt a fixed frequency pump or a variable frequency pump, which can be selected according to specific conditions. In order to control the flow of sodium hydroxide solution, a first shut-off valve can be arranged at the outlet of the lye pump 130. The first shut-off valve can control the flow of sodium hydroxide solution and also has a shut-off function.

[0056] The acetic acid storage tank 120 is used for storing acetic acid solution, and the outlet of the acetic acid storage tank 120 is communicated with the inlet of the acetic acid pump 140. The acetic acid pump 140 is used for conveying acetic acid solution. The acetic acid pump 140 can adopt a fixed frequency pump or a variable frequency pump. A second shut-off valve can be arranged at the outlet of the acetic acid pump 140. The second shut-off valve can control the flow of acetic acid solution and also has a shut-off function.

[0057] The outlet of the alkali pump 130 is connected to the inlet of the reactor 150, and the outlet of the acetic acid pump 140 is connected to the inlet of the reactor 150. The sodium hydroxide solution and the acetic acid solution react within the reactor 150 to produce a sodium acetate solution. In a specific embodiment of the invention, the sodium hydroxide solution and the acetic acid solution are fed into the reactor 150 in a 1:1 molar ratio, using an alternating feeding method controlled by liquid level. For example, acetic acid solution is first injected into the reactor 150. When the acetic acid solution in the reactor 150 reaches a certain liquid level, the injection of acetic acid solution is stopped, and the injection of sodium hydroxide solution begins.

[0058] The inlet of the decolorizing filter 160 is connected to the outlet of the reaction vessel 150. The decolorizing filter 160 is used to decolorize and filter the sodium acetate solution. In a specific embodiment of the present invention, the decolorizing filter 160 is an activated carbon filter, which decolorizes and removes impurities from the sodium acetate solution.

[0059] Sodium hydroxide solution and acetic acid solution are respectively fed into reaction vessel 150 to react and generate sodium acetate solution. The generated sodium acetate solution is decolorized and impurity removed by decolorizing and filtration device 160 and then enters evaporation system 200 for evaporation and concentration.

[0060] like Figure 1 As shown, in a specific embodiment of the present invention, the evaporation system 200 includes a sodium acetate solution storage tank 210, a sodium acetate solution pump 220, a heater 230, and an evaporator 240.

[0061] The sodium acetate solution storage tank 210 has its inlet connected to the outlet of the decolorization and filtration device 160. The storage tank 210 stores sodium acetate solution, which, after decolorization and impurity removal, is then stored in it. The inlet of the sodium acetate solution pump 220 is connected to the outlet of the storage tank 210, the inlet of the heater 230 is connected to the outlet of the pump, and the inlet of the evaporator 240 is connected to the outlet of the heater 230. The sodium acetate solution in the storage tank 210 is pumped by the pump 220 to the heater 230 for heating. The heated sodium acetate solution then enters the evaporator 240 for evaporation and concentration.

[0062] On the basis of the above-mentioned embodiments, the heater 230 comprises a first heater 231 and a second heater 232, and the evaporator 240 comprises a first evaporator 241 and a second evaporator 242. Specifically, the inlet of the first heater 231 is communicated with the outlet of the sodium acetate solution pump 220 for heating the sodium acetate solution; the inlet of the first evaporator 241 is communicated with the outlet of the first heater 231 for evaporating and concentrating the sodium acetate solution; the inlet of the second heater 232 is communicated with the outlet of the first evaporator 241, and a sodium acetate concentrated solution pump 250 is arranged between the first evaporator 241 and the second heater 232; the inlet of the second evaporator 242 is communicated with the outlet of the second heater 232 for further evaporating and concentrating the sodium acetate solution.

[0063] The sodium acetate solution in the sodium acetate solution storage tank 210 is delivered to the first heater 231 by the sodium acetate solution pump 220 for heating. Specifically, the heat source of the first heater 231 can come from a boiler, and the heated sodium acetate solution enters the first evaporator 241 for decompression evaporation. The decompression evaporated sodium acetate solution is delivered to the second heater 232 by the sodium acetate concentrated solution pump 250 for heating, and the heated sodium acetate solution enters the second evaporator 242 for further evaporation and concentration.

[0064] In order to improve the energy utilization efficiency and reduce the energy consumption of the whole process, the steam outlet of the first evaporator 241 is communicated with the inlet of a booster 260, and the outlet of the booster 260 is communicated with the inlet of the second heater 232, and the steam is used as the heating heat source of the second heater 232. The steam generated in the first evaporator 241 enters the second heater 232 as a heat source after being pressurized by the booster 260 to heat the sodium acetate concentrated solution, thereby fully utilizing the steam generated by the first evaporator 241 and reducing the consumption of steam.

[0065] The sodium acetate and sodium acetate trihydrate production device disclosed in the embodiments of the present application is provided with a crystallizer circulating pump 350 for delivering the crystallized material back to the crystallizer 320. When the sodium acetate trihydrate product is prepared, the further concentrated sodium acetate solution is delivered to the crystallizer 320 by a sodium acetate crystallization pump 310, cooling water is introduced into the jacket of the crystallizer 320 to reduce the temperature in the kettle, and the sodium acetate solution is crystallized to generate sodium acetate trihydrate. The crystallized material is partially circulated to the crystallizer 320 by the crystallizer circulating pump 350 to serve as the crystallization core of the sodium acetate trihydrate, and is partially discharged to a filter 330 for filtration. The filtered liquid is delivered to the first heater 231 by a return pump 370 for recycling, and the filtered solid is directly sent to a drying system 400 for drying to prepare the sodium acetate trihydrate product.

[0066] The sodium acetate and sodium acetate trihydrate production device disclosed by the embodiment of the present application, the drying system 400 comprises a fluidized bed dryer 410, a screening machine 420, a packaging machine 430 and a scrubber 440. The fluidized bed dryer 410 is connected to the outlet of the filter 330, and is used for drying the solid passing through the filter 330; the inlet of the screening machine 420 is connected to the outlet of the fluidized bed dryer 410, and the dried sodium acetate is screened; the inlet of the packaging machine 430 is connected to the outlet of the screening machine 420, and since the screening is not needed when the sodium acetate trihydrate product is prepared, but the screening is needed when the sodium acetate product is prepared, therefore, the inlet of the packaging machine 430 and the inlet of the screening machine 420 are provided with a second bypass pipeline 450, and the second bypass pipeline 450 is provided with a second bypass valve 451.

[0067] When the sodium acetate trihydrate product is prepared, the solid filtered by the filter 330 is directly sent to the fluidized bed dryer 410 for drying, and after drying, the solid is sent to the packaging machine 430 through the second bypass pipeline 450, that is, the sodium acetate trihydrate product is prepared, and at this time, the second bypass valve 451 is in an open state. When the sodium acetate product is prepared, after the sodium acetate solution is concentrated by evaporation, the sodium acetate solution is directly sent to the fluidized bed dryer 410 for drying through the sodium acetate crystallization pump 310, and after drying, the sodium acetate solution is screened by the screening machine 420, and after screening, the sodium acetate solution is packaged by the packaging machine 430, that is, the sodium acetate product is prepared, and at this time, the second bypass valve 451 is in a closed state.

[0068] The scrubber 440 is connected to the gas outlet of the fluidized bed dryer 410, and is used for washing the gas discharged from the fluidized bed dryer 410. Specifically, the gas discharged from the upper gas discharge port of the fluidized bed dryer 410 enters the scrubber 440 through the gas feeding port located in the middle part of the scrubber 440, and at the same time, the tap water mist spray head located in the interior of the scrubber is opened to spray tap water to complete the gas washing, and the waste water after washing is discharged into the waste water pool 460.

[0069] On the basis of the above-mentioned embodiments, the air heater 360 is arranged between the secondary evaporator 242 and the fluidized bed dryer 410, the steam outlet of the secondary evaporator 242 is communicated with the air heater 360, the steam of the secondary evaporator 242 is used for heating the air entering the air heater 360, and the air outlet of the air heater 360 is communicated with the fluidized bed dryer 410. The steam generated by the secondary evaporator 242 enters the air heater 360 and is used for heating the air, and the heated air is used as the drying heat source of the fluidized bed dryer 410. Specifically, the material enters the fluidized bed dryer 410 through a material distributor at one end of the fluidized bed dryer 410, the heated air contacts the material through a distribution plate from the bottom of the fluidized bed, and the purpose of drying the solid material is achieved. The steam generated by the secondary evaporator 242 is recycled and used as the heat source for heating the air, and the heated air is used as the drying heat source of the fluidized bed dryer 410, thereby reducing the energy consumption of the system operation, saving the production cost, and making the whole system more energy-saving and environment-friendly.

[0070] In a specific embodiment of the present application, the secondary heater 232 is communicated with the alkali dissolving tank 500, the air heater 360 is communicated with the alkali dissolving tank 500, and the condensate liquid generated by the secondary heater 232 and the air heater 360 enters the alkali dissolving tank 500 and is used for dissolving the flake alkali. It should be noted that the flake alkali is dissolved to obtain a sodium hydroxide solution. The condensate liquid is recycled, thereby reducing the consumption of water resources.

[0071] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0072] As shown in the present application and claims, unless the context clearly indicates otherwise, the words "one", "an", "a", and / or "the" do not specify a singular form, but also include a plural form. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprises one" does not exclude the presence of another same element in the process, method, product or device comprising the element.

[0073] Hereinafter, the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features.

[0074] The principles and implementations of the present application are described in the specific examples in this article, and the above examples are only used to help understand the core idea of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A production apparatus for sodium acetate and sodium acetate trihydrate, used to produce sodium acetate and sodium acetate trihydrate products, characterized in that, The application relates to a sodium acetate production system. The system comprises a reaction system (100) for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution; an evaporation system (200) connected with the reaction system (100) and used for evaporating and concentrating the sodium acetate solution; a crystallization system (300) connected with the evaporation system (200) and used for crystallizing the evaporated and concentrated sodium acetate solution to prepare sodium acetate trihydrate; the crystallization system (300) comprises a sodium acetate crystallization pump (310), a crystallizer (320) and a filter (330), the outlet of the sodium acetate crystallization pump (310) is communicated with the inlet of the crystallizer (320), the inlet of the filter (330) is communicated with the outlet of the crystallizer (320), a first bypass pipe (340) is arranged between the sodium acetate crystallization pump (310) and the filter (330), and a first bypass valve (341) is arranged on the first bypass pipe (340); a drying system (400) connected with the outlet pipeline of the filter (330) and used for drying the solid in the evaporated and concentrated sodium acetate solution and the solid of the crystallized sodium acetate trihydrate to prepare sodium acetate product and sodium acetate trihydrate product. When the sodium acetate product is prepared, the crystallizer (320) is not operated, sodium hydroxide solution and acetic acid solution generate sodium acetate solution in the reaction system (100), the sodium acetate solution is evaporated and concentrated in the evaporation system (200) and then directly enters the filter (330) through the first bypass pipe (340) to be filtered, the first bypass valve (341) is in an open state at this time, the filtered solid is directly sent to the drying system (400) to be dried, and the sodium acetate product is prepared after drying. When the sodium acetate trihydrate product is prepared, sodium hydroxide solution and acetic acid solution generate sodium acetate solution in the reaction system (100), the sodium acetate solution is evaporated and concentrated in the evaporation system (200) and then enters the crystallizer (320) through the sodium acetate crystallization pump (310), cooling water is introduced into the jacket of the crystallizer (320) to reduce the temperature in the kettle, and the sodium acetate solution is crystallized to generate sodium acetate trihydrate. The crystallized sodium acetate trihydrate enters the filter (330) to be filtered, the filtered solid is sent to the drying system (400) to be dried, and the sodium acetate trihydrate product is prepared after drying. The reaction system (100) comprises a sodium hydroxide storage tank (110) for storing the sodium hydroxide solution, the outlet of the sodium hydroxide storage tank (110) is communicated with the inlet of a lye pump (130), and the lye pump (130) is used for conveying the sodium hydroxide solution; an acetic acid storage tank (120) for storing the acetic acid solution, the outlet of the acetic acid storage tank (120) is communicated with the inlet of an acetic acid pump (140), and the acetic acid pump (140) is used for conveying the acetic acid solution. ​ ​ 2. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 1, wherein ​ ​ ​ A reactor (150), an outlet of the lye pump (130) is communicated with an inlet of the reactor (150), an outlet of the acetic acid pump (140) is communicated with an inlet of the reactor (150), the sodium hydroxide solution and the acetic acid solution react in the reactor (150) to generate the sodium acetate solution; A decoloring and filtering device (160), an inlet of the decoloring and filtering device (160) is communicated with an outlet of the reactor (150), the decoloring and filtering device (160) is used for decoloring and filtering the sodium acetate solution.

3. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 2, wherein A first shut-off valve is arranged on an outlet pipeline of the lye pump (130), and a second shut-off valve is arranged on an outlet pipeline of the acetic acid pump (140).

4. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 3, wherein The evaporation system (200) comprises: A sodium acetate solution storage tank (210), an inlet of the sodium acetate solution storage tank (210) is communicated with an outlet of the decoloring and filtering device (160), and the sodium acetate solution storage tank (210) is used for storing the sodium acetate solution; A sodium acetate solution pump (220), an inlet of the sodium acetate solution pump (220) is communicated with an outlet of the sodium acetate solution storage tank (210); A heater (230), an inlet of the heater (230) is communicated with an outlet of the sodium acetate solution pump (220); An evaporator (240), an inlet of the evaporator (240) is communicated with an outlet of the heater (230).

5. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 4, wherein The heater (230) comprises a first-stage heater (231) and a second-stage heater (232); The evaporator (240) comprises a first-stage evaporator (241) and a second-stage evaporator (242); An inlet of the first-stage heater (231) is communicated with an outlet of the sodium acetate solution pump (220) and is used for heating the sodium acetate solution; an inlet of the first-stage evaporator (241) is communicated with an outlet of the first-stage heater (231) and is used for evaporating and concentrating the sodium acetate solution; an inlet of the second-stage heater (232) is communicated with an outlet of the first-stage evaporator (241), a sodium acetate concentrate pump (250) is arranged between the first-stage evaporator (241) and the second-stage heater (232); and an inlet of the second-stage evaporator (242) is communicated with an outlet of the second-stage heater (232) and is used for further evaporating and concentrating the sodium acetate solution.

6. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 5, wherein A steam outlet of the first-stage evaporator (241) is communicated with an inlet of a booster (260), and an outlet of the booster (260) is communicated with an inlet of the second-stage heater (232), and the steam is used as a heating heat source of the second-stage heater (232).

7. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 5, wherein The crystallization system (300) is provided with a crystallizer circulating pump (350) which is used for conveying the crystallized material back to the crystallizer (320).

8. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 7, wherein The drying system (400) comprises: A fluidized bed dryer (410) which is communicated with an outlet of the filter (330) and is used for drying the solid which passes through the filter (330); A screening machine (420) is connected to the outlet of the fluidized bed dryer (410) for screening the dried sodium acetate solid to produce the sodium acetate product; A packaging machine (430) is connected to the outlet of the screening machine (420), and a second bypass pipe (450) is provided between the inlet of the packaging machine (430) and the outlet of the screening machine (420), and a second bypass valve (451) is provided on the second bypass pipe (450); A scrubber (440) is connected to the gas outlet of the fluidized bed dryer (410) for scrubbing the gas discharged from the fluidized bed dryer (410).

9. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 8, wherein An air heater (360) is provided between the secondary evaporator (242) and the fluidized bed dryer (410), and the steam outlet of the secondary evaporator (242) is connected to the air heater (360), and the steam of the secondary evaporator (242) is used to heat the air entering the air heater (360), and the air outlet of the air heater (360) is connected to the fluidized bed dryer (410).

10. The apparatus for producing sodium acetate and sodium acetate trihydrate according to claim 9, wherein The condensate liquid outlet of the secondary heater (232) is connected to an alkali dissolving tank (500), and the condensate liquid outlet of the air heater (360) is connected to the alkali dissolving tank (500).

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