Steam heating bin pretreatment device suitable for semi-solid hazardous waste

Abstract

The utility model provides a steam heating bin pretreatment device suitable for semi-solid hazardous waste, which comprises a steam generator, a steam output pipe, a steam chamber, an SMP mixing bin and a steam loop pipe, one end of the steam output pipe is connected with the steam generator, the other end of the steam output pipe is connected with the steam chamber, the steam chamber is positioned between the inner wall of the SMP mixing bin and a stirring shaft of the SMP mixing bin, and the steam loop pipe is connected with the steam chamber. The steam output pipe is arranged in the steam chamber and is arranged on the inner wall of the SMP mixing bin, one end of the steam loop pipe is connected with the steam chamber, the other end of the steam loop pipe is connected with the steam generator, the steam output pipe electric control valve is arranged on the steam output pipe, and the loop pipe electric control valve is arranged on the steam loop pipe. According to the device, through combination of steam heating and mechanical stirring, the problem that the semi-solid hazardous waste cannot be stirred and mixed uniformly due to high-temperature melting or low-temperature solidification in the pretreatment stage can be effectively solved, so that efficient pretreatment of the semi-solid hazardous waste with high temperature sensitivity is achieved, and the fluidity and uniformity of the semi-solid hazardous waste are improved.

Description

Technical Field

[0001] This utility model pertains to hazardous waste pretreatment devices in the environmental protection field, specifically relating to a steam-heated chamber pretreatment device suitable for semi-solid hazardous waste. Background Technology

[0002] In the hazardous waste disposal industry, the proportion of semi-solid hazardous waste is increasing year by year. Some semi-solid hazardous waste contains a large amount of organic matter, and some even has flammable characteristics. Currently, hazardous waste disposal companies mainly use the following methods to dispose of semi-solid hazardous waste: comprehensive utilization, solidification and landfill, specialized incineration, and co-processing in cement kilns. In the co-processing of hazardous waste in cement kilns, semi-solid hazardous waste is further divided into SMP (Separation-Mechanical Processing) and three-state separation systems. In SMP, the pretreatment of semi-solid hazardous waste involves filling a sealed space with nitrogen before dispersing and mixing the hazardous waste. In the three-state separation system, the pretreatment involves directly feeding the mixed hazardous waste into a semi-solid sludge silo, where it is mixed by an internal stirring device before being transported to the kiln for disposal.

[0003] In existing pretreatment methods for co-processing semi-solid hazardous waste in cement kilns, the SMP system requires nitrogen injection into a closed space. Mixing is then performed using a stirrer under nitrogen protection. Its advantage is its ability to handle solid waste with flammable characteristics. The three-state separation system uses a semi-solid sludge silo for mixing. Hazardous waste has a complex physical state, and while the semi-solid sludge silo is suitable for handling conventional sludge-like semi-solid materials, it is insufficient for materials with high temperature sensitivity, such as those that melt at high temperatures and solidify at low temperatures. Therefore, there is an urgent need for equipment that can safely heat and simultaneously mix and stir, capable of handling both conventional semi-solid materials and materials that melt at high temperatures and solidify at low temperatures to meet the needs of disposal companies. Utility Model Content

[0004] To address the problem of the inability to handle temperature-sensitive materials in the pretreatment process of semi-solid hazardous waste in the aforementioned prior art, this utility model provides a steam-heated chamber pretreatment device suitable for semi-solid hazardous waste. Its purpose is to effectively address the problem of semi-solid hazardous waste being unable to be stirred and mixed evenly due to high-temperature melting or low-temperature solidification during the pretreatment stage by combining steam heating and mechanical stirring. This achieves efficient pretreatment of semi-solid hazardous waste, improves its fluidity and uniformity, and thus solves the problem of the inability to handle temperature-sensitive materials in the pretreatment process of semi-solid hazardous waste, ensuring the smooth progress of subsequent treatment procedures.

[0005] To achieve the above objectives, the specific solution of this utility model is as follows:

[0006] A steam-heated chamber pretreatment device suitable for semi-solid hazardous waste includes a steam generator, a steam output pipe, a steam chamber, an SMP mixing silo, and a steam return pipe. One end of the steam output pipe is connected to the steam generator, and the other end is connected to the steam chamber. The steam chamber is located between the inner wall of the SMP mixing silo and the stirring shaft of the SMP mixing silo, and is installed on the inner wall of the SMP mixing silo. One end of the steam return pipe is connected to the steam chamber, and the other end is connected to the steam generator. An electric control valve for the steam output pipe is installed on the steam output pipe, and an electric control valve for the return pipe is installed on the steam return pipe.

[0007] Furthermore, the outer wall of the SMP mixing hopper is wrapped with an insulation layer made of rubber and plastic sponge, and the outside of the insulation layer is coated with a waterproof coating layer.

[0008] Furthermore, the thickness of the insulation layer is 50mm to 100mm.

[0009] Furthermore, the inner wall of the steam chamber is coated with a Teflon coating.

[0010] Furthermore, the inside of the steam output pipe is coated with an anti-scaling coating.

[0011] Advantages of this utility model

[0012] 1. Significantly Improved Pretreatment Efficiency: The steam generator of this utility model, suitable for a steam-heated chamber pretreatment device for semi-solid hazardous waste, delivers high-temperature steam to the steam chamber through a steam output pipe to heat the materials in the SMP mixing chamber. The combination of steam heating and mechanical stirring can quickly heat the semi-solid hazardous waste to the required temperature, and achieve uniform mixing through stirring, avoiding local overheating or uneven melting. This significantly improves pretreatment efficiency, solves the technical bottleneck of the difficulty in treating semi-solid hazardous waste under different temperature conditions, and has significant technical advantages and application prospects.

[0013] 2. Energy saving, easy maintenance and cleaning: The steam chamber of this device has a detachable structure, facilitating regular cleaning and maintenance. The inner wall of the steam chamber is mirror-polished, reducing material adhesion and residue during heating, further improving the cleanliness and efficiency of the equipment. This ensures effective heat transfer while preventing heat loss. Incompletely condensed steam returns to the steam generator through the steam loop pipe, forming a steam circulation loop and realizing steam recycling, thereby improving energy efficiency and reducing operating costs. An insulation layer surrounds the outside of the device, further reducing heat loss and enhancing overall thermal efficiency.

[0014] 3. Excellent thermal insulation performance: The insulation layer of this device is made of porous closed-cell rubber and plastic foam, which contains a large number of independent closed-cell air bubbles. These air bubbles can effectively block heat conduction while maintaining a low density to reduce the overall weight. The thickness of the insulation layer can be flexibly adjusted according to changes in ambient temperature.

[0015] 4. Simple structure, low cost, and wide applicability: The device has a compact structure, is easy to install, and facilitates later maintenance and upgrades. Furthermore, its reasonable design effectively reduces manufacturing and operating costs, and it is suitable for the pretreatment of various semi-solid hazardous wastes, meeting the needs of different hazardous waste disposal companies and possessing broad application prospects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the steam-heated chamber pretreatment device suitable for semi-solid hazardous waste according to this utility model.

[0017] 1. Steam generator; 2. Steam output pipe; 3. Steam output pipe solenoid valve; 4. Steam chamber; 5. SMP mixing silo; 6. Agitator shaft; 7. Steam return pipe; 8. Return pipe solenoid valve; 9. Insulation layer. Detailed Implementation

[0018] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be noted that the specific embodiments are not intended to limit the scope of the present invention.

[0019] like Figure 1 As shown, a steam-heated chamber pretreatment device suitable for semi-solid hazardous waste in this specific embodiment includes a steam generator 1, a steam output pipe 2, a steam output pipe electric control valve 3, a steam chamber 4, an SMP mixing chamber 5, a stirring shaft 6, a steam return pipe 7, and a return pipe electric control valve 8.

[0020] Steam generator 1 is a market-purchased product. The specific brand, model and parameters can be selected according to actual needs. It is used to generate high-temperature and high-pressure steam with a temperature of up to 120℃ to meet the heating needs of semi-solid hazardous waste.

[0021] One end of the steam output pipe 2 is connected to the steam generator 1 via a threaded connection or flange, and the other end is connected to the steam chamber 4 via a threaded connection or flange to ensure sealing and reliability. The steam output pipe 2 is used to transport high-temperature steam. The steam output pipe 2 is a commercially available product, with specifications selected according to system design requirements. It is made of high-temperature resistant and corrosion-resistant stainless steel to ensure long-term stable operation at high operating temperatures. An anti-scaling coating is applied inside the steam output pipe 2 to effectively resist corrosion and scaling problems that may occur during steam transmission, extending the service life of the equipment while ensuring the purity and transmission efficiency of the steam. Furthermore, the inner wall of the steam output pipe 2 is polished to effectively reduce steam flow resistance and improve energy transmission efficiency.

[0022] The steam output pipe solenoid valve 3 is installed on the steam output pipe 2 to control the steam flow rate, thereby achieving precise control of the flow rate in the steam output pipe 2. The steam output pipe solenoid valve 3 is a commercially available component.

[0023] The steam chamber 4 is nested between the inner wall of the SMP mixing chamber 5 and the stirring shaft 6 of the SMP mixing chamber 5, and is bolted detachably to the inner wall of the SMP mixing chamber 5 for easy regular cleaning and maintenance. The SMP mixing chamber 5 is used to store semi-solid hazardous waste to be treated. The outer wall of the SMP mixing chamber 5 is tightly fitted to the steam chamber 4, and the steam heat is efficiently transferred to the material inside the SMP mixing chamber 5 through heat conduction. The stirring shaft 6 adjusts its speed according to the state of the material to ensure that the material is fully mixed during the heating process and to avoid local overheating or uneven melting. The steam chamber 4 is a tubular structure welded from high-strength metal plates, and the material must have good heat resistance and sealing properties. The inner wall of the steam chamber 4 is mirror-polished and coated with a Teflon coating, which has excellent anti-stick properties and prevents scale deposition after high-temperature steam condensation. The design of the steam chamber 4 fully considers pressure balance to ensure safe operation under extreme conditions.

[0024] The outer wall of the SMP mixing chamber 5 is wrapped with an insulation layer 9, which is made of porous closed-cell rubber-plastic foam. This layer contains numerous independent, closed-cell air bubbles, effectively preventing heat transfer to the outside and ensuring that heat is primarily transferred to the mixing chamber through the steam chamber, thus achieving uniform heating of the hazardous waste inside. The thickness of the insulation layer is determined according to actual operating conditions, ranging from 50mm to 100mm. A waterproof coating is applied to the outside of the insulation layer to effectively prevent performance degradation caused by moisture penetration. The insulation layer is firmly attached to the outer wall of the steam chamber 4 using mechanical fixing or adhesive bonding, ensuring stability during long-term use.

[0025] One end of the steam loop pipe 7 is connected to the steam chamber 4, and the other end is connected to the steam generator 1. The steam loop pipe 7 has the same specifications as the steam output pipe 2, forming a complete steam circulation loop to improve energy efficiency. The end of the steam loop pipe 7 is connected to the condensate recovery device inside the steam generator 1, which can collect and reuse condensate, further reducing energy consumption. The inner wall of the steam loop pipe 7 is also polished to ensure smooth steam flow and reduce unnecessary energy loss.

[0026] The return pipe solenoid valve 8 is installed on the steam return pipe 7. The return pipe solenoid valve 8 is identical in specifications to the steam output pipe solenoid valve 10, and is used to control the opening and closing of the steam circuit and the flow rate of the return steam. The return pipe solenoid valve 8 is identical in specifications to the steam output pipe solenoid valve 3. Both the return pipe solenoid valve 8 and the steam output pipe solenoid valve 3 are purchased from the market and have integrated fault self-diagnosis functions, which can automatically close the circuit in abnormal situations to prevent condensate backflow from affecting the normal operation of the system.

[0027] Working principle

[0028] 1. Steam generation and transportation

[0029] For semi-solid hazardous waste with a melting point in the range of 60℃ to 120℃, high-temperature steam is generated by steam generator 1, with a maximum steam temperature of 120℃. The high-temperature steam is introduced into steam chamber 4 through steam output pipe 2. Steam output pipe 2 is made of high-temperature resistant and corrosion-resistant materials to ensure long-term stable operation at high operating temperatures.

[0030] 2. Heat conduction and material heating

[0031] The steam chamber 4 is embedded in the inner wall of the SMP mixing chamber 5, which is made of metal and can efficiently conduct heat to the semi-solid hazardous waste inside the SMP mixing chamber 5. The outer wall of the SMP mixing chamber 5 is covered with an insulation layer 9, and heat can only be conducted to the interior of the mixing chamber through the steam chamber, thereby achieving uniform heating of the hazardous waste inside the chamber.

[0032] 3. Stir and mix

[0033] Once the hazardous waste in the silo reaches the required melting temperature, the stirring shaft 6 of the SMP mixing silo 5 is activated to thoroughly mix the material, ensuring uniform mixing during the heating and melting process and avoiding localized overheating or uneven melting. The melted waste can then proceed to the next processing stage.

[0034] 4. Steam recovery and recycling

[0035] After heat exchange, the steam returns to the steam generator 1 through the steam loop pipe 7. The inner wall of the steam loop pipe 7 is polished to ensure smooth steam flow and reduce energy loss. The loop pipe solenoid valve 8 controls the opening and closing of the steam loop. A loop pipe solenoid valve 8 with integrated fault self-diagnosis function is selected from the market; it can automatically close the loop in abnormal situations to prevent condensate backflow from affecting the normal operation of the system. Incompletely condensed steam is collected and reused in the condensate recovery device inside the steam generator 1, further reducing energy consumption.

[0036] 5. System Startup and Safe Operation

[0037] Before starting steam generator 1 each time, the steam output pipe solenoid valve 3 and the return pipe solenoid valve 8 should be opened to ensure the normal operation and safe operation of the system. By precisely controlling the steam flow rate and the total amount of return steam, the device can efficiently complete the pretreatment of semi-solid hazardous waste.

[0038] Through the above workflow, this device can effectively solve the technical bottleneck of semi-solid hazardous waste being difficult to process under different temperature conditions, and significantly improve the stability and efficiency of waste pretreatment.

Claims

1. A steam heated bin pre-treatment device suitable for semi-solid hazardous waste, characterised in that, It comprises a steam generator, a steam output pipe, a steam chamber, an SMP mixing bin and a steam loop pipe, one end of the steam output pipe is connected with the steam generator, the other end is connected with the steam chamber, the steam chamber is located between the inner wall of the SMP mixing bin and the stirring shaft of the SMP mixing bin and is installed on the inner wall of the SMP mixing bin, one end of the steam loop pipe is connected with the steam chamber, the other end is connected with the steam generator, a steam output pipe electric control valve is installed on the steam output pipe and a loop pipe electric control valve is installed on the steam loop pipe.

2. The apparatus of claim 1, wherein, The outer wall of the SMP mixing bin is wrapped with a thermal insulation layer made of rubber-plastic sponge material, and the outer part of the thermal insulation layer is coated with a waterproof paint layer.

3. The apparatus of claim 2, wherein, The thickness of the thermal insulation layer is 50-100 mm.

4. The apparatus of claim 1, wherein, The inner wall of the steam chamber is coated with a Teflon coating.

5. The apparatus of claim 1, wherein, The inner part of the steam output pipe is coated with an anti-fouling coating.

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