1. A residual liquid treatment process generated in the waste acrylic recovery production process is characterized by comprising the following steps:

s1, distilling and condensing the residual liquid;

s2, removing impurities and then recycling condensate;

s3, conveying the condensate to a cracking process to be used as fuel of the cracking furnace;

s4, oxidizing and roasting the condensate in a cracking furnace, and heating the cracking furnace by the generated heat to provide heat energy for cracking the waste acrylic acid;

and S5, dedusting and cooling the flue gas subjected to oxidizing roasting, and discharging the flue gas after reaching the standard.

2. The process for treating the residual liquid generated in the recycling production process of the waste acrylic acid as claimed in claim 1, wherein in the step S1, the residual liquid is generated in the steps of cracking and rectifying.

3. The process for treating the residual liquid generated in the recycling production process of the waste acrylic acid as claimed in claim 1, wherein in the step S2, the impurity removal is performed by a filtering device.

4. The process for treating the residual liquid generated in the recycling production process of the waste acrylic acid as claimed in claim 1, wherein in the step S5, the dedusting and cooling equipment is a deduster and a cooling device.

Background

Organic glass (acrylic) is widely applied to various fields, and waste organic glass can be cracked to obtain an MMA (methyl methacrylate) monomer again, so that reproduction and utilization can be realized. The existing organic glass cracking method is generally to crack by a cracking furnace in a mode of supplying energy by external electric energy or new fuel, namely, electric heating, heating by purchased fuel oil and fuel gas and the like are adopted; then, MMA monomers are obtained through cooling of a condenser, residual liquid generated by cracking and rectification belongs to dangerous waste, the existing process is not utilized, a qualified unit is required to process, enterprises need to pay higher disposal cost, or heavy oil is sold at low price through an underground market, and great potential safety hazards and environmental pollution problems exist.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Aiming at the technical problems in the related art, the invention provides a residual liquid treatment process generated in the waste acrylic recovery production process, which can effectively recover and treat residual liquid generated in the waste acrylic regeneration process and can be used as a raw material for energy supply in the cracking furnace production.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

a residual liquid treatment process generated in the waste acrylic recovery production process comprises the following steps:

s1, distilling and condensing the residual liquid;

s2, removing impurities and then recycling condensate;

s3, conveying the condensate to a cracking process to be used as fuel of the cracking furnace;

s4, oxidizing and roasting the condensate in a cracking furnace, and heating the cracking furnace by the generated heat to provide heat energy for cracking the waste acrylic acid;

and S5, dedusting and cooling the flue gas subjected to oxidizing roasting, and discharging the flue gas after reaching the standard.

Preferably, in the step S1, the raffinate is the raffinate produced in the cracking and rectifying step.

Preferably, in the step S2, the impurity removal is performed by a filtering device.

Preferably, in step S5, the dust removing and cooling device is a dust remover and a cooling device.

The invention has the beneficial effects that:

1. and after distillation and condensation of the cracking and rectification residual liquid, removing impurities by a filter device and recovering the condensate.

2. The condensate is conveyed to a cracking procedure to be used as fuel of the cracking furnace for safe and environment-friendly utilization, and the disposal cost of enterprises is saved.

3. The heat generated by oxidizing and roasting the condensate in the cracking furnace heats the cracking furnace, provides heat energy for cracking the waste acrylic, and saves the cost of purchasing new fuel by enterprises.

4. The condensed liquid enters a dust remover and a cooling device for dust removal and cooling after the flue gas subjected to oxidizing roasting in the cracking furnace, so that the dust content and the temperature of the flue gas are reduced, and the flue gas is discharged after reaching the standard.

5. The cracking and rectifying residual liquid is condensed, purified, recycled by secondary combustion and discharged after reaching the standard, so that the cost of enterprises is saved, and the pollution of the residual liquid to the environment is eliminated.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

The residual liquid treatment process generated in the waste acrylic recovery production process comprises the following steps:

step a: distilling and condensing the cracking and rectifying residual liquid, and then removing impurities by using a filtering device to recover condensate;

step b: the condensate is conveyed to a cracking process to be used as fuel of a cracking furnace for safe and environment-friendly utilization;

step c: the heat generated by the condensate in the cracking furnace heats the cracking furnace to provide heat energy for cracking the waste acrylic acid;

step d: the condensed liquid is oxidized and roasted in the cracking furnace, and the flue gas enters a dust remover and a cooling device for dust removal and cooling and then is discharged after reaching the standard.

In summary, the residual liquid treatment process generated in the waste acrylic acid recovery production process according to the invention comprises the following steps: distilling and condensing the cracked and rectified residual liquid; removing impurities from the condensate; the heat energy is supplied by oxidizing and roasting the condensate; dedusting and cooling the flue gas; discharging after reaching the standard. The invention realizes the purpose of safe and environment-friendly utilization of residual liquid generated in the cracking and rectifying processes, saves the disposal cost and the purchasing cost of new fuel of enterprises, improves the economic benefit of the enterprises, and also realizes good social and environment-friendly benefits.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.