CN209791549U

CN209791549U - Neutralization drying device is used in surfactant production

Info

Publication number: CN209791549U
Application number: CN201920461623.7U
Authority: CN
Inventors: 祝红元; 汪家众; 贺迎; 马俊俊
Original assignee: Jiangsu Fengyi Chemical Technology Co Ltd
Current assignee: Jiangsu Youyang Pharmaceutical Co.,Ltd.
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2019-12-17
Anticipated expiration: 2029-04-08

Abstract

The utility model discloses a neutralization drying device for producing a surfactant, which comprises a cylinder, a motor and a rotor; the cylinder body is divided into three sections from top to bottom, namely a separation section, a neutralization section and a drying section in sequence, and the sections are connected through flanges; the rotor is fixed at the center of the cylinder through bearings positioned at the upper end and the lower end of the cylinder, the motor is connected with the rotor through a shaft, and the rotor is provided with a scraper; an air extraction opening, a neutralizer feeding opening and a sulfonic acid feeding opening are respectively formed in the separation section cylinder body; the upper end of the separation section cylinder is provided with a sealing cover, the lower end of the drying section cylinder is connected with the additive feeder together to form a mixing machine, an outlet of the mixing machine is connected with an extruder, and the extruder is connected with the vibrating fluidized bed. The utility model discloses in the device with, dry as an organic whole, reaction effect is good, safe energy-conservation.

Description

Neutralization drying device is used in surfactant production

Technical Field

The utility model relates to a neutralization drying device for surfactant production.

Background

Gaseous SO₃The production of sulfonated sulfated surfactants has two kinds of neutralization and drying techniques, one is that the raw material is firstly sulfonated, neutralized at low concentration and spray-dried by hot air flow. Firstly, 30% low-concentration product is produced, and the spray is directly contacted with hot air flow for dehydration and drying. In order to ensure good fluidity of the sprayed material, a large amount of water is required to be added during neutralization; the dry part is easy to bond due to the materials, the local high temperature is high, the production period is short, the energy consumption is high, and the product is easy to generate black spots. In another production process, the raw materials are firstly sulfonated, neutralized with high concentration, and indirectly heated by steam for dehydration and drying. That is, the surfactant monomer with the concentration of about 70% is produced and then conveyed to vacuum turbulence drying or a film scraping drying system for dehydration. This process also requires the use of good flow of the material for transport, and requires the addition of small amounts of water or the use of low concentrations of neutralizing agent for neutralization.

The production process is carried out separately because of neutralization reaction and drying dehydration, so that the neutralization process and material conveying need to ensure good fluidity, otherwise, the process cannot be realized. The transport of fluids has high requirements on viscosity: the low-viscosity material is conveyed by a centrifugal pump, and the viscosity is generally less than 500 CP; the high-viscosity materials are conveyed by using a gear pump, a rotor pump, a screw pump and the like, and the viscosity is generally less than 20000 cp. The material fluidity is extremely important because the sulfonated sulfated surfactant neutralization process is a neutralization loop reactor, which requires a large amount of material to be circulated to prevent overheating of the neutralization reaction. According to the colloid characteristic of the surfactant, the intermediate monomer with the concentration of 25-35% and the concentration of 65-75% has better fluidity generally; the concentration range of 35-65% and the concentration range of more than 75% basically have no fluidity, and the materials cannot be conveyed; a large amount of diluent is required to be added when the concentration is less than 25%, so that the transportation cost is greatly increased; the higher the concentration of the material to be dried and dehydrated, the better. So the acid, alkali and water from the sulfonation reaction are firstly controlled to be 25-35% or 65-75% of the product in the neutralization system, and then are conveyed by a pump for drying.

For products that need to be dried, the lower the water content the better for energy saving purposes, but too low a water content would make the material too viscous. For the ultrahigh-concentration materials with the concentration of more than 75%, the conveying in the neutralization process and the conveying in the drying process cannot be realized.

The product concentration is calculated by the diluent-neutralizer concentration and flow relationships of the neutralization process, as further illustrated by the calculations below.

TABLE 1 neutralization of production of K with 30% liquid caustic₁₂Compare with AES to illustrate:

As the AES is neutralized without adding diluent water, the concentration reaches 76 percent, so that neutralization can not be carried out without fluidity. Therefore, 300kg of water was added to control the dilution concentration to 70%.

Table 2 neutralization using 45% liquid caustic produces a comparative illustration of K12 and AES:

(1) K12 was neutralized without the addition of diluent water to a concentration of 80%, resulting in no flow for neutralization. 450kg of water is required to be added for dilution concentration control at 70%.

(2) AES neutralization is not added with diluent water, the concentration reaches 84 percent, and the neutralization can not be carried out without fluidity. 600kg of water was added for dilution.

These added water drying processes all need to be stripped off, resulting in wasted energy. The material cannot be conveyed without adding a diluent, and the neutralization reaction cannot be completed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses a surfactant production is with neutralization drying device solves the neutralization of super high concentration material in the surfactant production to and in order to guarantee that the material is mobile to add some water, deviate from again at the drying process, the extravagant scheduling problem of energy.

The utility model relates to a neutralization drying device for producing a surfactant, which comprises a cylinder, a motor and a rotor; the cylinder body is divided into three sections from top to bottom, namely a separation section, a neutralization section and a drying section in sequence, and the sections are connected through flanges; the rotor is fixed at the center of the cylinder through bearings positioned at the upper end and the lower end of the cylinder, the motor is connected with the rotor through a shaft, and the rotor is provided with a scraper; an air extraction opening, a neutralizer feeding opening and a sulfonic acid feeding opening are respectively formed in the separation section cylinder body; the upper end of the separation section cylinder is provided with a sealing cover, the lower end of the drying section cylinder is connected with the additive feeder together to form a mixing machine, an outlet of the mixing machine is connected with an extruder, and the extruder is connected with the vibrating fluidized bed.

Further, the thickness of the material film of the drying section is less than 5 mm.

Furthermore, a heat-preservation jacket is arranged outside the cylinder at the middle section, and a heating jacket is arranged outside the cylinder at the dry section to preserve heat and dry the materials to transfer energy. The temperature of the neutralization section is 40-95 ℃, the temperature of the drying section is 80-120 ℃, and the system pressure is less than or equal to-10 KPa.

The mixing machine of the utility model comprises various solid-solid and solid-liquid mixing machines.

The beneficial effects of the utility model reside in that:

(1) The neutralization drying efficiency is improved, and no diluent is required in the neutralization reaction. The utility model discloses utilize the high-speed rotatory compulsory film-forming of rotor to mix, accomplish high-efficient the mixing to acid, alkali, the moisture evaporation that the reaction generated directly shifts to the device center and removes and take away the heat, and the control dehydration volume guarantees suitable temperature during neutralization, guarantees the film-forming and mixes, and after accomplishing super high concentration neutralizer and carrying on neutralization, further dehydration is dry. Various defects of neutralization and drying after ensuring good fluidity of the material are avoided.

(2) The equipment investment is simplified, the safety and the energy conservation are realized, the drying is carried out immediately after the neutralization, and a separate neutralization system, a homogenization system and a drying system are not needed; the energy-saving effect is obvious;

Table 3 electrical energy consumption comparison (1 t device):

(3) The pH controllability of the product is good, a mixer is equipped, and the stability of the product is ensured by adding additives through an additive feeder.

drawings

Fig. 1 is a schematic structural diagram of the neutralization and drying device of the present invention.

In the figure: 1-cylinder, 2-additive feeder, 3-mixer, 31-mixer feed hopper, 4-extruder, 5-vibrated fluidized bed, 11-separation section, 12-neutralization section, 13-drying section, 14-motor, 15-rotor, 111-air exhaust port, 112-neutralizer feed port, 113-sulfonic acid feed port, 16-upper bearing, 17-lower bearing, 121-heat preservation jacket, 131-heating jacket and 151-scraper.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

examples

As shown in fig. 1, a neutralization drying device for producing a surfactant comprises a cylinder body 1, a motor 14 and a rotor 15; the cylinder body 1 is divided into three sections from top to bottom, namely a separation section 11, a neutralization section 12 and a drying section 13 in sequence, and the sections are connected through flanges; the rotor 15 is fixed at the center of the cylinder through bearings positioned at the upper end and the lower end of the cylinder, the motor 14 is connected with the rotor 15 through a shaft, and the rotor 15 is provided with a scraper 151; the separation section cylinder body is respectively provided with an extraction opening 111, a neutralizer feeding opening 112 and a sulfonic acid feeding opening 113; the upper end of the separation section cylinder is provided with a sealing cover, the lower end of the drying section cylinder is connected with the outlet of the additive feeder 2 to form an inlet feed hopper of the mixer 3, the outlet of the mixer 3 is connected with the extruder 4, and the extruder 4 is connected with the vibrating fluidized bed 5.

and a heat-insulating jacket 121 is arranged outside the cylinder at the neutralization section, and a heating jacket 131 is arranged outside the cylinder at the drying section to transfer energy for heat-insulating and drying the materials.

the feed inlet of the utility model is divided into an upper layer and a lower layer, the upper layer is composed of 1 or more neutralizer feed inlets 112, and the neutralizer is immediately scraped into a film by a rotor after being fed and moves downwards in a spiral way; the lower layer is composed of 1 or more sulfonic acid feed inlets 113, the sulfonic acid is scraped into a film by a rotor immediately after being fed, the film moves downwards, a neutralizer and the sulfonic acid are mixed at the lower part of the separation section for neutralization reaction, two materials are forcibly and efficiently mixed due to the high-speed rotation of the rotor, part of the heat of reaction is taken away by intermediate stripping, and part of the heat of reaction is transferred to the heat-insulating jacket 121. Neutralization and high-speed mixing are completed in the separation section, and a large amount of heat is removed. In the process, the excessive amount of sulfonic acid is required to ensure the neutralization dosage, the neutralization monomer is mixed under a safer pH value, and the material is easily discolored and the equipment is easily corroded due to too low neutralization agent.

Then the material moves downwards to a neutralization section to complete the whole neutralization reaction of the high-viscosity material, most of heat is removed by steam stripping, a jacket provides a small amount of energy for the material, and the temperature of the material in the neutralization section is controlled by fluid in the jacket to prevent the water from evaporating too fast due to too high temperature, so that the neutralization reaction effect is poor; meanwhile, the phenomenon that the film cannot be formed because the temperature of the water evaporation heat absorption material is too low and the fluidity is lost is also prevented; because the concentration of the high-concentration neutralizing agent and the sulfonic acid reaction intermediate monomer is more than 80 percent, the water content in the heat release process of the neutralization reaction is further improved to more than 85 percent, the neutralization reaction belongs to a high-viscosity area, the temperature control is extremely important, the viscosity is too high when the temperature is too low, and the neutralization effect is poor when the temperature is too high.

The neutralized high-concentration material spirally moves downwards to the lower end drying section, is rapidly filmed by a rotor rotating at high speed, the film thickness is less than 5mm, water is vaporized by energy provided by a heating lower cylinder and a jacket heat source, 5-15% of volatile matters are removed, and drying is finished. The external heat source conducts heat to the materials through the wall of the cylinder, the volatile matter is vaporized after being heated and separated from the materials, and the volatile matter is uniformly discharged through the extraction opening 111 of the separation section. Compared with the drying of 70% of materials, the materials with the concentration of 75-85% have high viscosity and the worst drying efficiency; the neutralization reaction in the process is completed to reach the concentration of more than 85 percent, and the stage is avoided, so the drying speed is extremely high, and the drying time is greatly shortened.

In the process of neutralization and drying, because the excess of the neutralizing agent can cause the indexes of free alkali, pH and the like to be higher, a certain amount of additive is added into the mixer through the additive feeder, and the free alkali and the pH of the product are ensured to be qualified. And dispersing the mixed materials into small particles by using an extruder, and finally cooling by using a vibrating fluidized bed to obtain the required dry product.

Claims

1. A surfactant production is with neutralization drying device which characterized in that: comprises a cylinder, a motor and a rotor; the cylinder body is divided into three sections from top to bottom, namely a separation section, a neutralization section and a drying section in sequence, and the sections are connected through flanges; the rotor is fixed at the center of the cylinder through bearings positioned at the upper end and the lower end of the cylinder, the motor is connected with the rotor through a shaft, and the rotor is provided with a scraper; an air extraction opening, a neutralizer feeding opening and a sulfonic acid feeding opening are respectively formed in the separation section cylinder body; the upper end of the separation section cylinder is provided with a sealing cover, the lower end of the drying section cylinder is connected with the additive feeder together to form a mixing machine, an outlet of the mixing machine is connected with an extruder, and the extruder is connected with the vibrating fluidized bed.

2. The neutralization and drying apparatus for surfactant production according to claim 1, characterized in that: the thickness of the material film in the drying section is less than 5mm, the temperature in the neutralization section is 40-95 ℃, the temperature in the drying section is 80-120 ℃, and the system pressure is less than or equal to-10 KPa.

3. the neutralization and drying apparatus for surfactant production according to claim 1, characterized in that: and a heat-preservation jacket is arranged outside the cylinder at the middle section, and a heating jacket is arranged outside the cylinder at the dry section to preserve heat, dry and transfer energy for the materials.