Sodium hydrosulfite preparation device

Abstract

The utility model discloses a sodium hydrosulfite preparation device which comprises a reaction tank, a liquid storage tank and a heater, the heater is used for controlling the temperature of the reaction tank; the liquid storage tank is used for storing sulfur dioxide methanol absorption liquid, the liquid storage tank is provided with a discharging pipeline, and the reaction tank is provided with a feeding pipeline and a sampling pipeline; the discharging pipeline is communicated with the feeding pipeline and is used for inputting sulfur dioxide methanol absorption liquid into the reaction tank; and a valve body is arranged between the discharging pipeline and the feeding pipeline. The sodium hydrosulfite preparation device disclosed by the utility model is convenient for operators to sample and detect the reaction pH value in real time; the sulfur dioxide methanol absorption liquid is slowly pressed into the reaction tank through the liquid storage tank, so that the pH value of the reaction is adjusted, and the proceeding of the whole reaction is controlled; meanwhile, the input quantity and the flow velocity of the sulfur dioxide methanol absorption liquid are accurately controlled through the valve body, so that the stability and the controllability of the reaction process are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical production equipment technical field especially relates to a sodium hydrosulfite preparation device. BACKGROUND

[0002] Sodium hydrosulfite, scientific name is sodium hydrosulfite (Sodium Hydrosulfite), molecular formula is (Na2S2O4), molecular weight is 174.11, and the dangerous rule number is 42012, UN number is 1384, and CAS number is 7775-14-6.As an important organic compound, sodium hydrosulfite is widely used in the reduction dyeing, reduction cleaning, printing and decoloring of textile industry and is used as the bleaching of silk, wool, nylon and other fabrics, and since it does not contain heavy metal, the fabric after bleaching is very bright, and it is not easy to fade.In various substances, it can also be used for food bleaching, such as gelatin, cane sugar, candied fruit, and soap, animal (plant) oil, bamboo, porcelain clay bleaching, etc.It can also be applied to organic synthesis, such as the production of dyes, drugs as reducing agent or bleaching agent, and sodium hydrosulfite is the most suitable bleaching agent for wood pulp papermaking.

[0003] At present, the equipment for preparing sodium hydrosulfite is mainly through a plurality of processes, and in the existing sodium formate process, the whole reaction process is divided into three stages of adjusting pH value, large drop and small drop;Among them, the step of adjusting pH value is generally adjusted by manually adding sulfur dioxide methanol absorption liquid, and the feeding amount and the overall reaction time are highly dependent on the experience of the operator, thereby affecting the safe and efficient generation of sodium hydrosulfite;If excessive sulfur dioxide methanol absorption liquid is added, sodium hydrosulfite will decompose under the condition of excessive acid to produce by-products.

[0004] Therefore, it is important to design a sodium hydrosulfite preparation device which is convenient to operate and can control the input amount and flow rate of sulfur dioxide methanol absorption liquid for improving production efficiency and product quality. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of sodium hydrosulfite preparation device to solve the problems raised in the above background art.To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of sodium hydrosulfite preparation device, including reaction tank, liquid storage tank and heater;The heater is used to control the temperature of the reaction tank;The liquid storage tank is used to store sulfur dioxide methanol absorption liquid, and the liquid storage tank is provided with discharge pipeline, and the reaction tank is provided with feeding pipe and sampling pipe;The discharge pipeline is communicated with the feeding pipe, and is used to input sulfur dioxide methanol absorption liquid into the reaction tank;Valve body is arranged between the discharge pipeline and the feeding pipe.

[0007] Further, the reaction tank is further provided with a stirring mechanism, the stirring mechanism comprising a motor, a double-blade stirring paddle and a U-shaped stirring paddle, the motor being used to drive the double-blade stirring paddle and the U-shaped stirring paddle to rotate; the double-blade stirring paddle is arranged at the middle part of the inner cavity of the reaction tank, and the U-shaped stirring paddle is arranged at the lower part of the inner cavity of the reaction tank.

[0008] Further, the reaction tank is further provided with a temperature detection device.

[0009] Further, the reaction tank is further provided with an exhaust pipeline, a pressurizing pipeline and a pressure gauge.

[0010] Further, the liquid storage tank is further provided with an emptying pipeline and a pressure gauge.

[0011] Further, the liquid storage tank is further provided with a liquid level gauge.

[0012] Further, the lower end of the discharging pipeline is inserted into the lower part of the inner cavity of the liquid storage tank.

[0013] The insurance powder preparation device has the advantages that: the insurance powder preparation device is convenient for an operator to detect the reaction pH value in real time; the sulfur dioxide methanol absorption liquid is slowly pressed into the reaction tank through the liquid storage tank, so as to adjust the pH value of the reaction, thereby controlling the whole reaction; and the input amount and flow rate of the sulfur dioxide methanol absorption liquid are accurately controlled through the valve body, so as to ensure the stability and controllability of the reaction process. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0015] Figure 1 The figure is a structural schematic diagram of the present application.

[0016] Figure 2 The figure is a structural schematic diagram of the reaction tank and the liquid storage tank in the present application.

[0017] It should be noted that the drawings are not necessarily drawn to scale, but are only shown in a schematic manner without affecting the understanding of the reader. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0019] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0021] In addition, the terms "mounting", "setting", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0022] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0023] It should also be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] It should be further understood that the term "and / or" used in the description and claims of the utility model is intended to mean any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0025] As shown in Figure 1 and Figure 2 A sodium hydrosulfite preparation device, comprising a reaction tank 1, a liquid storage tank 2 and a heater 3; the heater 3 is used to control the temperature of the reaction tank 1; the liquid storage tank 2 is used to store sulfur dioxide methanol absorption liquid, and the liquid storage tank 2 is provided with a discharge pipeline 21, and the reaction tank 1 is provided with a feeding pipeline 11 and a sampling pipeline 12; the discharge pipeline 21 communicates with the feeding pipeline 11, and is used to input the sulfur dioxide methanol absorption liquid into the reaction tank 1; a valve body 22 is arranged between the discharge pipeline 21 and the feeding pipeline 11.

[0026] As an example, the sodium hydrosulfite preparation device of the embodiment of the application comprises a reaction tank 1, a liquid storage tank 2 and a heater 3. The reaction tank 1 is a flange structure, the upper and lower cover bodies and the pipeline opening or extending on the upper cover are all made of 304 or 316 stainless steel material, the tank wall of the reaction tank 1 is quartz glass, the quartz glass can facilitate the full observation of the change of the material in the reaction tank 1; the contact part of the lower cover with the quartz glass and the internal contact part with the material are concave structures, and a round cake structure made of polytetrafluoroethylene material is placed in the concave structure of the lower cover; the concave structure of the upper cover is an inner concave structure, which is filled with polytetrafluoroethylene, and the polytetrafluoroethylene exists between the upper cover and the quartz glass; the sealing effect of the reaction tank 1 is ensured. The main function of the reaction tank 1 is to serve as a reaction device for preparing sodium hydrosulfite, and after the sodium formate, sodium pyrosulfite, water and methanol and other raw materials are mixed and treated according to a certain proportion, a raw material liquid is obtained, and the raw material liquid and the sulfur dioxide methanol absorption liquid are added into the reaction tank 1 for reaction. The reaction tank 1 is provided with a sampling pipeline 12, and a ball valve is arranged on the sampling pipeline 12; during the reaction process, the operator can sample from the reaction tank 1 through the sampling pipeline 12, detect the content and pH value of the sodium hydrosulfite, and monitor the reaction change in real time and at regular time intervals; specifically, the operator can open the sampling pipeline 12 every 20 min to take out the reaction solution during the reaction process, and detect the pH value of the solution by using precise pH test paper.

[0027] The heater 3 is an instant constant temperature heater 3, and the reaction tank 1 is placed in the instant constant temperature heater 3; the temperature of the reaction tank 1 is controlled by the heater 3, so that the reaction is carried out in a suitable temperature range, so as to optimize the chemical reaction rate and the purity of the product.

[0028] The liquid storage tank 2 comprises a tank body and a cover body, and three groups of butterfly nuts and fixing bolts are arranged between the tank body and the cover body to fix and seal the cover body and the tank body. The liquid storage tank 2 is used for storing sulfur dioxide methanol absorption liquid to continuously supplement the sulfur dioxide methanol absorption liquid into the reaction tank 1 during the reaction.

[0029] The connection mode between the liquid storage tank 2 and the reaction tank 1 is as follows: the liquid storage tank 2 is provided with a discharge pipeline 21, the reaction tank 1 is provided with a feeding pipeline 11, and a ball valve is arranged in each of the discharge pipeline 21 and the feeding pipeline 11; the discharge pipeline 21 communicates with the feeding pipeline 11, and is used for inputting the sulfur dioxide methanol absorption liquid in the liquid storage tank 2 into the reaction tank 1; the lower end of the feeding pipeline 11 is a 0.2-3mm ground insertion tube, which can sufficiently reduce the flow of the sulfur dioxide methanol absorption liquid and prevent excessive addition of the sulfur dioxide methanol absorption liquid. During the reaction, the operator can input the sulfur dioxide methanol absorption liquid in the liquid storage tank 2 into the reaction tank 1 according to the change of the pH value of the solution detected by real-time sampling, so as to adjust the pH value of the solution and control the whole reaction. Meanwhile, a valve body 22 is further arranged between the discharge pipeline 21 and the feeding pipeline 11, and the valve body 22 is a needle valve. The needle valve is used for accurately adjusting the flow by an elongated needle-shaped valve core, and is suitable for small flow applications which need to be accurately controlled. The needle valve type valve body 22 can accurately control the input amount and flow rate of the sulfur dioxide methanol absorption liquid, and ensure the stability and controllability of the reaction process.

[0030] In an embodiment, referring to Figure 2 The reaction tank 1 is further provided with a stirring mechanism, which comprises a motor 13, a double-blade stirring paddle 14 and a U-shaped stirring paddle 15. The motor 13 is used for driving the double-blade stirring paddle 14 and the U-shaped stirring paddle 15 to rotate. The double-blade stirring paddle 14 is arranged in the middle part of the inner cavity of the reaction tank 1, and the U-shaped stirring paddle 15 is arranged in the lower part of the inner cavity of the reaction tank 1.

[0031] As an example, the reaction tank 1 is further provided with a stirring mechanism for stirring the material during the reaction. The stirring mechanism comprises a motor 13, a double-blade stirring paddle 14 and a U-shaped stirring paddle 15. The motor 13 is a magnetic stirring motor 13. The magnetic stirring motor 13 drives the double-blade stirring paddle 14 and the U-shaped stirring paddle 15 to rotate by installing a magnet below the motor 13 by using the action of a magnetic field. The stirring mode of the magnetic stirring paddle has the advantage that it can realize leakage-free stirring under high temperature and high pressure, thereby ensuring the full sealing of the reaction tank 1 and solving the problem of product leakage. The double-blade stirring paddle 14 is arranged in the middle part of the inner cavity of the reaction tank 1, and is used for promoting the full stirring and uniform mixing of the material. The U-shaped stirring paddle 15 is arranged in the lower part of the inner cavity of the reaction tank 1, and can more effectively stir the material at the bottom to prevent the occurrence of the phenomenon of sinking to the bottom, which leads to uneven reaction or local overheating, thereby improving the reaction efficiency and product quality.

[0032] In an embodiment, referring toFigure 2 The reaction tank 1 is also provided with a temperature detection device 16.

[0033] As an example, the reaction tank 1 is inserted into the electric thermocouple type temperature detection device 16 through the bottom inner sleeve, the temperature in the reaction tank 1 is monitored in real time, and the reaction tank 1 is controlled in real time by the heater 3 to ensure that the reaction is carried out in a safe and efficient temperature range.

[0034] In an embodiment, referring to Figure 2 The reaction tank 1 is also provided with an exhaust pipeline 17, a pressurizing pipeline 18 and a pressure gauge.

[0035] As an example, in order to adjust the pressure in the reaction tank 1, the reaction tank 1 is also provided with an exhaust pipeline 17, a pressurizing pipeline 18 and a pressure gauge. A ball valve is arranged in the exhaust pipeline 17, and a metal spiral pipe condenser is connected to the rear end of the ball valve. The condenser can realize the condensation reflux of the raw material by introducing condensed water. A back pressure valve is also connected to the end of the exhaust pipeline 17, which is used to control the pressure stability of the reaction tank 1 during the reaction. A ball valve is arranged in the pressurizing pipeline 18, and the pressurizing pipeline 18 is connected to an external nitrogen tank. The pressure in the reaction tank 1 is adjusted and controlled by supplementing nitrogen into the reaction tank 1. The pressure gauge on the reaction tank 1 is used to detect the pressure in the reaction tank 1, and the pressure detection range is 0-1.2Mpa.

[0036] In an embodiment, referring to Figure 2 The liquid storage tank 2 is also provided with an emptying pipeline 23 and a pressure gauge.

[0037] As an example, in order to monitor and control the pressure in the liquid storage tank 2, ensure the safety of raw material storage and transportation, the liquid storage tank 2 is provided with an emptying pipeline 23 and a pressure gauge; the emptying pipeline 23 is used to control the pressure in the tank; the pressure gauge on the liquid storage tank 2 is used to detect the pressure in the liquid storage tank 2, and the pressure detection range is 0-1.0Mpa.

[0038] In an embodiment, referring to Figure 2 The liquid storage tank 2 is also provided with a liquid level meter 24.

[0039] As an example, the liquid storage tank 2 is also provided with a liquid level meter 24, which is fixed by a sleeve joint at both ends and a PVDF transparent pipe in the middle for observing the change of the liquid level, accurately grasping the remaining amount of raw materials in the liquid storage tank 2, and timely supplementing raw materials to avoid interruption of production.

[0040] In an embodiment, the lower end of the discharge pipeline 21 is inserted into the lower part of the inner cavity of the liquid storage tank 2.

[0041] As an example, in order to optimize the raw material output effect, ensure that the sulfur dioxide methanol absorption liquid can be fully and uniformly input into the reaction tank 1, the lower end of the discharge pipeline 21 is designed as a plug-in pipe, which is inserted into the lower part of the inner cavity of the liquid storage tank 2, and the sulfur dioxide methanol absorption liquid is pressed out from the bottom of the liquid storage tank 2.

[0042] For the embodiments of the present application, it should be noted that the embodiments and the features in the embodiments of the present application can be combined with each other to obtain new embodiments without conflict.

[0043] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. The protection scope of the present application should be subject to the protection scope of the claims. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution range of the present application to obtain equivalent embodiments with equivalent changes. Any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the technical solution range of the present application.

Claims

1. A device for the preparation of sodium hydrosulfite, characterized in that it comprises: The device comprises a reaction tank (1), a liquid storage tank (2) and a heater (3); the heater (3) is used for controlling the temperature of the reaction tank (1); the liquid storage tank (2) is used for storing sulfur dioxide methanol absorption liquid, and is provided with a discharge pipeline (21); the reaction tank (1) is provided with a feeding pipeline (11) and a sampling pipeline (12); the discharge pipeline (21) is communicated with the feeding pipeline (11) and used for inputting sulfur dioxide methanol absorption liquid into the reaction tank (1); and a valve body (22) is arranged between the discharge pipeline (21) and the feeding pipeline (11).

2. The sodium hydrosulfite preparation device according to claim 1, characterized by: The reaction tank (1) is further provided with a stirring mechanism, which comprises a motor (13), a double-blade stirring paddle (14) and a U-shaped stirring paddle (15); the motor (13) is used for driving the double-blade stirring paddle (14) and the U-shaped stirring paddle (15) to rotate; the double-blade stirring paddle (14) is arranged at the middle part of the inner cavity of the reaction tank (1); and the U-shaped stirring paddle (15) is arranged at the lower part of the inner cavity of the reaction tank (1).

3. The sodium hydrosulfite producing device according to claim 1, characterized by: The reaction tank (1) is further provided with a temperature detection device (16).

4. The sodium hydrosulfite producing device according to claim 1, wherein: The reaction tank (1) is further provided with an exhaust pipeline (17), a pressurizing pipeline (18) and a pressure gauge.

5. The sodium hydrosulfite producing device according to claim 1, wherein: The liquid storage tank (2) is further provided with an emptying pipeline (23) and a pressure gauge.

6. The sodium hydrosulfite producing device according to claim 1, wherein: The liquid storage tank (2) is further provided with a liquid level meter (24).

7. The sodium hydrosulfite producing device according to claim 1, characterized by: The lower end of the discharge pipeline (21) is inserted into the lower part of the inner cavity of the liquid storage tank (2).

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