Applied technology for realizing circular economy industrial chain in benzoic acid purification production process

An application technology and production process technology, which is applied in the field of application technology to realize the industrial chain of circular economy in the production process of refined benzoic acid, to achieve the effects of saving funds, saving production funds, and saving water resources

Inactive Publication Date: 2009-08-19
TIANJIN DONGDA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 2. During the dissolution process, there are solid residues and a small amount of dust entrained by the hot air flow to be discharged to the outside

Method used

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  • Applied technology for realizing circular economy industrial chain in benzoic acid purification production process
  • Applied technology for realizing circular economy industrial chain in benzoic acid purification production process
  • Applied technology for realizing circular economy industrial chain in benzoic acid purification production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as image 3 As shown, the exhaust steam comprehensive utilization process is composed of exhaust steam trap-dissolving tank-dryer. In the dissolution process and drying process of the refined benzoic acid production process, the steam required for heating is collected by the exhaust steam Provided by the steam boiler instead of the saturated steam provided by the steam boiler. Add industrial benzoic acid into the dissolving tank, open the water inlet valve of the dissolving tank, and add the condensed water from the powdered sodium benzoate dryer. Close the water inlet valve after the water level reaches the scale required by the production operation. Open the steam inlet valve of the dissolution tank, feed the steam of the exhaust steam trap, and heat the industrial benzoic acid solution. When the temperature in the dissolution tank reaches the requirements of the production process, stop heating and close the steam valve. After the solution settled in the tank...

Embodiment 2

[0046] Such as Figure 7 As shown, the comprehensive utilization process of condensed water is composed of powdery sodium benzoate dryer-dissolving tank. The solvent for dissolving industrial benzoic acid in the dissolving tank is the condensed water from the powdered sodium benzoate dryer.

[0047] During the production process, the condensed water from the powdered sodium benzoate dryer enters the dissolution tank through the pipeline. Since the industrial benzoic acid is dissolved by using the steam condensed water of the powdered sodium benzoate dryer, the dissolution tank can save 5m water for one dissolution process 3 . The dissolving tank can dissolve 25 times a day (24 hours), saving a total of 125m of water 3 (5m 3 / tank × 25 tanks = 125m 3 / day), one month water saving (125m 3 / day × 30 days = 3750m 3 / month), the annual water saving can be 41250m 3 (3750m 3 / month×November=41250m 3 ).

Embodiment 3

[0049] Such as Figure 4 As shown, the solid residue recycling process is composed of a dissolution tank-benzoic acid distillation tank-neutralization tank. The solid residue after static precipitation of the solution in the dissolution tank, that is, the undissolved substance, enters the benzoic acid distillation process through the discharge valve at the bottom of the dissolution tank, and enters the powdery sodium benzoate production after being purified into benzoic acid by the benzoic acid distillation kettle The neutralization tank in the system is used as the raw material for the production of powdery sodium benzoate products.

[0050] During the dissolution process, the solid residue that settles down after each dissolution process in the dissolution tank is 15kg of undissolved material, and the solid residue that settles down in one day is 375Kg (15Kg / tank×25 tanks=375Kg / day), and it settles down in one month The solid residue is (375Kg / day×30 days=11250Kg / month), an...

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Abstract

The invention is an application technique for realizing recycling economy industrial chains in production processes of refining benzoic acid, comprising a refining benzoic acid production system and a powdery sodium benzoate production system. The invention comprises the procedures of dissolution, cooling crystallization, separation and dehydration, drying and product package; water in a dissolving tank is generated by condensing vapor after a powdery sodium benzoate drier dries sodium benzoate products; industrial benzoic acid dusts entrained by the generated smoke gas and dusts entrained byhot air flows in the process of drying are fed into the powdery sodium benzoate production system; deposited solid residues enter into the procedure of distilling the benzoic acid, and after one morepurification, enter into the neutralization procedure in the powdery sodium benzoate production system as production raw material of the powdery sodium benzoate products. In the invention, the raw material and materials as well as waste materials, waste liquids and waste gases generated in the process of producing the products are reasonably and efficiently recycled, which prevents the external exhaust of waste residue, waste gas and waster water, and realizes energy-saving and emission-reduction, sufficient utilization of production resources and environmental protection.

Description

technical field [0001] The present invention recycles the raw materials and materials used in the production of products in the chemical production process, especially in the production process of refined benzoic acid products, and realizes the economic industrial chain; it is an innovative technology in the field of energy-saving and emission-reduction technologies, and relates to refined benzoic acid products. The application technology of benzoic acid production process to realize the industrial chain of circular economy. Background technique [0002] In the production process of using industrial benzoic acid to produce refined benzoic acid products, there are external discharges of "three wastes" (waste residue, waste gas, and waste water), which not only pollute the environment but also make limited production resources not fully utilized. For the original production process we used in the production process of refined benzoic acid products, see figure 1 . [0003] Su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C63/06C07C63/08C07C51/41C07C51/43
Inventor 赵富贵
Owner TIANJIN DONGDA CHEM GRP
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