A 240 hb hazardous waste treatment method

Abstract

The present application relates to a kind of 240HB hazardous waste treatment methods, first by the way of distillation Chlorine-containing organic matter is separated from 240HB, and then the chlorine-containing overflow liquid and residual liquid are incinerated, so that the separation and treatment of chlorine and iron, phosphorus in 240HB are effectively realized, and the amount of chlorine does not need to be controlled in subsequent combustion process, thereby effectively solving the technical problems of small processing capacity and poor processing effect caused by the need to control the content of chlorine in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hazardous waste treatment, and particularly relates to a 240HB hazardous waste treatment method. BACKGROUND

[0002] The main elements contained in 240HB hazardous waste are 66% of chlorine, 23% of carbon, 2% of phosphorus, 3% of iron, 3% of hydrogen and 3% of oxygen. The existing treatment process is to burn the 240HB hazardous waste in a rotary kiln after being mixed with other hazardous waste. However, the content of chlorine needs to be controlled during the mixing process, and the HCL generated after the burning will produce 2-3 times more waste salt than itself. The waste salt needs to be landfilled, and the treatment cost is also very high. Therefore, a technical solution solving the above technical problems is needed. SUMMARY

[0003] The present application aims to provide a 240HB hazardous waste treatment method which can effectively solve the above technical problems.

[0004] To achieve the purpose of the present application, the following technical solutions are adopted:

[0005] A 240HB hazardous waste treatment method, comprising the following steps:

[0006] Step 1: Pretreatment of 240HB hazardous waste: Put the 240HB hazardous waste into an evaporator for distillation, then condense the steam using chilled water to obtain a distillate containing chlorine, and cool the liquid remaining after distillation to obtain a residue containing iron and phosphorus.

[0007] Step 2: Burn the distillate and the residue separately.

[0008] Preferably, in step 1, the temperature during distillation is controlled at 125-130 degrees, and the vacuum degree is controlled at 300-500 Pa.

[0009] Preferably, in step 2, the HCL generated after burning the distillate is absorbed by water to form hydrochloric acid, which is then used as a raw material for producing calcium chloride.

[0010] Preferably, in step 2, the burning temperature of the distillate is 800-1100 degrees.

[0011] Preferably, in step 2, the burning temperature of the residue is 800-1000 degrees.

[0012] Preferably, in step 2, the residue generated after burning the residue is landfilled.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] 1. The method employed in this invention first separates chlorine-containing organic matter from 240HB via distillation, and then incinerates the chlorine-containing eluent and residual liquid, thereby effectively achieving…

[0015] The 240HB solution separates chlorine from iron and phosphorus, and the amount of chlorine does not need to be controlled during subsequent combustion. This effectively solves the technical problem of small processing capacity and poor treatment effect caused by the need to control the chlorine content in the existing technology.

[0016] 2. The method used in this invention involves incinerating the distillate to produce HCl, which is then absorbed by water to form hydrochloric acid, and this hydrochloric acid is used as a raw material for the production of calcium chloride. Compared with existing treatment methods that use alkali to absorb HCl and require landfilling of the resulting waste residue, this method is less costly.

[0017] 3. The method adopted in this invention effectively reduces dioxin emissions, reduces environmental pollution, and saves energy and protects the environment by using an incinerator instead of the original rotary kiln to burn chlorinated organic compounds. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 A process flow diagram of a 240HB hazardous waste treatment method provided by the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0021] like Figure 1 As shown, the present invention provides a method for treating 240HB hazardous waste, comprising the following steps:

[0022] Step 1: Pretreatment of 240HB hazardous waste: The 240HB hazardous waste is placed in a chain scraper evaporator for distillation. The temperature is controlled at 125-130 degrees Celsius and the vacuum is controlled at 300-500 Pa. The organic materials that provide chlorine content in the 240HB hazardous waste are separated from the 240HB hazardous waste by simple distillation. Then, the distillate is condensed to below 20 degrees Celsius by chilled water and collected in a storage tank as distillate. The unevaporated iron and phosphorus-containing components are cooled to below 80 degrees Celsius and collected in another storage tank as residual liquid.

[0023] Step 2: Incinerate the distillate and residue separately; specifically:

[0024] The process of incineration of the distillate is as follows: the distillate is mainly chlorine-containing organic material, which is disposed by a high-chlorine incinerator on the market at 1100 degrees for incineration treatment. The HCL produced by incineration is absorbed by water to form hydrochloric acid, which is then used as a raw material for producing calcium chloride;

[0025] The process of incineration of the residual liquid is as follows: the residual liquid mainly contains phosphorus and iron, which is incinerated by a rotary kiln at 1000 degrees. The residue after incineration is treated by landfill by a qualified unit.

[0026] The treatment capacity of the above method for 240HB hazardous waste is as follows: 50 kg / hr, calculated at 300 days and 7200 hours, the treatment capacity can reach 3240 tons / year, which is 2-3 times higher than the existing direct incineration treatment method; the emission concentration of dioxin is reduced by 5 times, which is far lower than the national standard requirement.

[0027] Various modifications to the embodiments described herein will be readily apparent to those persons who are skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application.

Claims

1. A 240 HB hazardous waste treatment method characterized by: It comprises the following steps: Step 1: Pretreatment of 240HB hazardous waste: Put 240HB hazardous waste into the evaporator for distillation, then condense the steam using chilled water to obtain a distillate containing chlorine, and cool the liquid remaining after distillation to obtain a residual liquid containing iron and phosphorus; Step 2: Incineration of the distillate and the residual liquid respectively.

2. The 240 HB hazardous waste treatment method of claim 1, wherein: In step 1, the temperature during distillation is controlled at 125-130 degrees, and the vacuum degree is controlled at 300-500 Pa.

3. The 240 HB hazardous waste treatment method of claim 1, wherein: In step 2, the HCL produced after incineration of the distillate is absorbed by water to form hydrochloric acid, which is then used as a raw material for producing calcium chloride.

4. The 240 HB hazardous waste treatment method of claim 1, wherein: The incineration temperature of the distillate in step 2 is 800-1100 degrees.

5. A hazardous waste treatment method according to claim 1, characterized by: The incineration temperature of the residual liquid in step 2 is 800-1000 degrees.

6. The 240 HB hazardous waste treatment method of claim 1, wherein: The residue produced after incineration of the residual liquid in step 2 is landfilled.

Images