CN100594792C - A kind of production method of disinfectant - Google Patents

Abstract

The invention discloses a production method of a disinfectant. The production method of the disinfectant is special in that it includes the following steps: (1) chlorination reaction; (2) centrifugal drying; (3) neutralization section; (4) granulation section; (5) drying The working section: the raw materials adopt the following proportions by weight: 0.585-0.715 parts of cyanuric acid, 0.459-0.561 parts of calcium carbonate, 0.648-0.792 parts of liquid chlorine, 5.4-6.6 parts of water, and 0.156-0.191 parts of sodium carbonate. The present invention first granulates (wet granulation) after the new technological improvement, and then dries..., and its advantages are: 1. The production environment is good. ② It not only saves the amount of coal used, but also conforms to the national policy of reducing energy consumption. ③The appearance of the product is spherical, cylindrical or pearl-like. Make the product more smooth, beautiful, strong hardness and other advantages.

Description

A kind of production method of disinfectant

(1) Technical field

The invention relates to a production method of a disinfectant.

(2) Background technology

The main chemical reactions used in the original old process are:

①2NaOH+CL ₂ ＝NaCLO+NaCL+H ₂ O

②C ₃ H ₃ N ₃ O ₃ +2NaCLO＝C ₃ HN ₃ O ₃ CL ₂ +2NaOH

③2C ₃ HN ₃ O ₃ CL ₂ +Na ₂ CO ₃ ＝2C ₃ N ₃ O ₃ CL ₂ Na+H ₂ O+CO ₂ ↑

Due to the use of NaoH solution, the cost of NaoH solution is higher.

It adopts the following process:

1. Chlorination reaction

Put 500-700kg of cyanuric acid powder and 796-930kg of NaOH solution into the reaction tank to form a mixed liquid, then open the mouth of the liquid chlorine steel bottle, enter the liquid chlorine buffer tank, spray the buffer tank with water, and discharge the liquid chlorine in the tank Vaporize, put the gas into the reaction tank through the pipeline, and react with the mixed liquid until the reaction time is about 5 to 8 hours, stop the chlorine flow, and start discharging.

2. Suction and filtration section

Put the chlorinated material into the suction filtration tank, turn on the vacuum filtration system, wait for 1 to 2 hours and stop the vacuum filtration system after the water content of about 3% to 5% is qualified, and start digging. to the next process.

3. Neutralization section

According to regulations, transport the filtered material in the suction filtration section to the mixer, start the mixer, add about 10-25kg of sodium carbonate per part (about 50kg) according to the process requirements, and pour it into the mixer for mixing. After mixing for a certain period of time, stop stirring, and unscrew the gate at the bottom of the mixer to discharge.

4. Drying section

Pour the neutralized material in the neutralization section into the screw feeder, and the screw feed starts to feed the material into the dryer, heat the hot air stove to about 160-360 °C, turn on the blower, and send the hot air to the air flow through the pipe for drying to start drying. After laboratory testing, the water content is controlled between 1.0% and 1.5%, and when the content is controlled between 60% and 62%, it is considered qualified. Also according to customer requirements, the water content is about 12%, and the content is also considered qualified at 50% to 55%.

5. Granulation section

Transport qualified products to this section for granulation. According to the customer's requirements for mesh packaging.

In the old process, after the neutralization reaction, it is first dried and then granulated (dry granulation). Disadvantages of dry granulation:

① The product smell and dust in the granulation section are relatively large, causing air pollution to the surroundings.

② The temperature required for drying is relatively high (160°C ~ 360°C), and the coal consumption is relatively large.

3. the outer surface of the produced grain is surrounded by a layer of powder, with uneven particle size, unattractive appearance, smoothness and feel.

(3) Contents of the invention

In order to make up for the deficiencies of the prior art, the invention provides a low-cost, environmentally friendly and beautiful disinfectant and a production method thereof.

The present invention is achieved through the following technical solutions:

A disinfectant, which is special in that it is mainly made of the following raw materials in parts by weight:

Cyanuric acid 0.585～0.715 parts Calcium carbonate 0.459～0.561 parts

Liquid chlorine 0.648-0.792 parts Water 5.4-6.6 parts.

The disinfectant of the present invention is further improved in that it additionally contains the following raw materials in parts by weight: 0.156 to 0.191 parts of sodium carbonate.

The disinfectant of the present invention may contain the following auxiliary materials in percentage by weight of the total raw materials: 0.9-1.1% of auxiliary agent and 1.8-2.2% of catalyst. The auxiliary agent is citric acid; the catalyst is sodium dodecylbenzenesulfonate.

The production method of disinfectant of the present invention, comprises the steps:

(1) Chlorination reaction: Add cyanuric acid and calcium carbonate in proportion to the reaction tank, stir evenly to form a mixed liquid, pump the mixed liquid into the filter for filtration; then open the mouth of the liquid chlorine steel bottle, and the liquid enters In the liquid chlorine buffer tank sprayed with water, vaporize, enter the reaction tank through the pipeline, and react with the mixed liquid. The reaction time is 3 to 5 hours, stop the chlorine flow, and start discharging;

(2) Centrifugal drying: Put the reacted material in the chlorination section into the centrifuge, wait for 1.0 to 1.5 hours to stop, take samples for testing, start unloading, and go to the next process;

(3) Neutralization section: transport the dried material to the mixer according to the regulations, start the mixer, add sodium carbonate according to the process requirements, mix for 3 to 10 minutes, stop mixing, and discharge;

(4) Granulation section: the wet material is granulated through an extruder, and the extruded granules are granulated through a ball forming equipment to further shape the granules;

(5) Drying section: put the wet granules sent from the granulation section into the drum machine, turn on the hot air blower, send the hot air into the drum machine through the pipeline, start to rotate, and dry while further granulating. Sampling, after passing the standard, select grains for sub-packaging.

In the present invention, through research experiments, the new process uses _CaCO3 to replace the NaoH solution in the original old process, and then adds sodium dodecylbenzenesulfonate and other catalysts for reaction. The cost of _CaCO3 is lower and the cost of NaoH solution is higher, reducing the production cost.

Chemical equation of the present invention:

①C ₃ N ₃ O ₃ H ₃ +CaCO ₃ +2Cl ₂ ＝C ₃ N ₃ O ₃ HCl ₂ +CaCl ₂ +CO ₂ ↑+H ₂ O

②C ₃ N ₃ O ₃ HCl ₂ +Na ₂ CO ₃ ＝2C ₃ N ₃ O ₃ NaCl ₂ +CO ₂ ↑+H ₂ O

Reaction mechanism of the present invention: Calcium carbonate is generally stable in nature and weakly alkaline, but under acidic conditions, its solubility increases and it is easy to react. This characteristic is used to promote the completion of the reaction.

Among them, the role of additives: to facilitate separation; the role of catalysts: to promote the reaction.

After the new process improvement, first granulation (wet granulation), then drying..., its advantages are:

①Wet granulation avoids the phenomenon of more dust in the workshop and powder on the outside of the granules, and the production environment is better.

②The temperature has been reduced from 160°C-360°C of the old process to 60°C-120°C of the new process, which not only saves coal consumption, but also conforms to the national policy of reducing energy consumption.

③The particle size produced by wet screw extrusion granulation is further shaped by rotating and rolling in equipment such as disc machine and cylinder machine. The appearance of the product is spherical, cylindrical or pearl-like. Make the product more smooth and beautiful.

④The hardness of granules is better than that of granules produced by dry method.

(4) Specific implementation methods

Example 1:

Adopt the proportion of ingredients by weight as follows:

Cyanuric acid: Calcium carbonate: Liquid chlorine: Water:

0.585kg 0.459kg 0.648kg 5.4kg

Citric acid: Sodium dodecylbenzenesulfonate: Sodium carbonate

0.064kg 0.128kg 0.156kg

The following process steps are adopted:

(1), chlorination reaction

Add cyanuric acid and calcium carbonate into the reaction tank in proportion, stir evenly to form a mixed liquid, pump the mixed liquid into the filter for filtration. Then open the mouth of the liquid chlorine cylinder, the liquid enters the liquid chlorine buffer tank sprayed with water, vaporizes, enters the reaction tank through the pipeline, and reacts with the mixed liquid. The reaction time is about 3 to 5 hours, stop the chlorine flow, and start discharging .

(2), centrifugal drying

Put the reacted material in the chlorination section into the centrifuge, wait for about 1.0 to 1.5 hours to stop, notify the laboratory to take samples for testing, start unloading, and go to the next process.

(3), neutralization section

Transport the dried material to the mixer according to the regulations, start the mixer, add sodium carbonate according to the process requirements, mix for about 3 to 10 minutes, stop mixing, and start discharging.

(4), granulation section

The wet material is granulated through the extruder, and the extruded granules are passed through the ball forming equipment, and then granulated inside to further shape the granules, which has the advantages of good smoothness and beautiful appearance of the product.

(5), drying section

Put the wet granules sent from the granulation section into the cylinder machine, turn on the hot air blower, transport the hot air to the cylinder machine through the pipeline, start to rotate, and dry while further granulating, notify the laboratory to take samples, after passing the test, Subcontract according to customer requirements.

Example 2:

Adopt the proportion of ingredients by weight as follows:

Cyanuric acid: Calcium carbonate: Liquid chlorine: Water:

0.715kg 0.561kg 0.792kg 6.6kg

Citric acid: Sodium Dialkylbenzene Sulfonate : Sodium Carbonate

0.095kg 0.191kg 0.191kg.

Others are the same as in Example 1.

Claims (2)

1. the production method of a disinfectant is characterized in that: comprise the steps:

(1), chlorination reaction: cyanuric acid and calcium carbonate are added in the retort in proportion, stir, become mixing material, mixed liquor is squeezed in the filter by pump filtered; Open the liquid chlorine cylinder mouthpiece then, liquid enters in the liquid chlorine surge tank of water spray, vaporizes, and enters in the retort by pipeline, reacts with mixing material, in 3～5 hours reaction time, stops logical chlorine, the beginning blowing;

(2), centrifuge dripping: the material that chlorination workshop section reacts good is put into centrifuge, waits to be thrown to 1.0～1.5 hours and to stop, sample examination, the beginning discharging is to next procedure;

(3), in and workshop section: in accordance with regulations the material that dries is transported in the mixer, started mixer, add sodium carbonate again, mixed 3～10 minutes, stop to mix, carry out blowing by technological requirement;

(4), granulation workshop section: wet feed is carried out granulation by extruder, and the grain that extruding is come out carries out whole grain by pan-pelletizer equipment, makes a further moulding;

(5), oven dry workshop section: the wet grain that granulation workshop section sends here, add in the cylindrical machine, open air-heater, hot blast is transported in the cylindrical machine by pipeline, begin to rotate, limit further whole grain limit oven dry, sampling, qualified after, the choosing grain carries out subpackage;

Described raw material adopts the proportioning of following parts by weight:

0.459～0.561 part in 0.585～0.715 part of calcium carbonate of cyanuric acid

5.4～6.6 parts in 0.648～0.792 part of water of liquid chlorine

0.156～0.191 part in sodium carbonate.

2. the production method of disinfectant according to claim 1 is characterized in that: also contain the following auxiliary material that accounts for the total raw material percentage by weight: 0.9～1.1% auxiliary agent and 1.8～2.2% catalyzer; Described auxiliary agent is a citric acid, and catalyzer is a neopelex.