A system and process for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge.
The system addresses the issue of pollutant accumulation in industrial furnace products by using exhaust gas to treat sludge and ASC/HAP-S adsorbents, achieving high-efficiency pollutant removal and resource recovery.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
- Filing Date
- 2025-02-24
- Publication Date
- 2026-05-01
AI Technical Summary
Current methods for treating urban sludge in industrial furnaces, such as cement and brick kilns, result in the accumulation of harmful elements like heavy metals and chlorine in products, affecting quality and increasing disposal costs due to incomplete exhaust gas purification.
A system and process that utilizes the exhaust gas from industrial furnaces as a heat source and oxidation medium to treat sludge, involving sequential drying, pyrolysis, and activation stages, followed by the use of an adsorbent prepared from activated sludge coal to remove pollutants, using hydroxyapatite-supported adsorbents (ASC/HAP-S) for multi-contaminant removal.
Achieves over 90% removal of pollutants like particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, and dioxins, reducing carbon emissions and media pollution while recycling heat energy and materials, with low energy consumption and cost.
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Figure 2026073915000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to the field of environmental engineering, and more specifically to a system and process for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge. [Background technology]
[0002] Urban sludge is a by-product generated during the treatment of wastewater from urban life. It has a complex composition, high water and organic matter content, and contains contaminants such as heavy metals, toxic substances, and pathogenic microorganisms. If not treated properly, it can lead to serious environmental pollution. With the increasing volume of wastewater discharged from urban areas, the amount of sludge discharged is constantly rising, and the problem of safe treatment and disposal of sludge is becoming increasingly prominent.
[0003] Currently, most urban sludge treatment methods employ landfill, aerobic composting, anaerobic digestion, incineration, and coordinated treatment using industrial furnaces. Landfill sites are large, their capacity is decreasing daily, sludge dewatering costs are high, and environmental risks exist, making the landfill process unable to meet the need for sludge detoxification. While aerobic composting and anaerobic digestion can effectively utilize the organic matter and nutrients contained in sludge, their long operating cycles and inability to reduce or remove toxic heavy metals and persistent organic pollutants result in low resource utilization, limiting the development of these technologies. Sludge incineration alone requires the construction of specialized incinerators, resulting in large inputs, high operating costs, and the problem of secondary treatment of residues. In recent years, the coordinated treatment of solid waste such as sludge using industrial furnaces has become an important sludge treatment method. Sludge can replace part of the fuel, and industrial furnaces can sufficiently incinerate the organic matter in the sludge. They also have relatively complete exhaust gas purification systems, and compared to sludge incineration alone, input and operating costs have been significantly reduced. However, because sludge has a complex composition and contains harmful elements such as heavy metals and chlorine, when it is directly treated in a coordinated industrial furnace such as a cement kiln or brick kiln, it can accumulate in products such as cement and bricks, affecting product quality and leading to difficulties and increased costs in the disposal of exhaust gas pollutants. [Overview of the project] [Means for solving the problem]
[0004] In response to the technical challenges of the prior art, the object of the present invention is to provide a system and process for reducing combined media contamination and carbon emissions used in the treatment of industrial furnace sludge. This is because sludge components are complex and contain harmful elements such as heavy metals and chlorine. When directly treated in industrial furnaces such as cement kilns and brick kilns, these contaminants can accumulate in products such as cement and bricks, affecting product quality and potentially leading to difficulties and increased costs in the disposal of exhaust gas pollutants.
[0005] To achieve the above objective, the present invention employs the following technical means: A system for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, The industrial furnace and kiln manufacturing unit is included, and the exhaust gas from the industrial furnace and kiln manufacturing unit enters the sludge treatment unit as a heat source and oxidation medium, while the remaining exhaust gas is transported to the dust removal unit. The system includes a sludge treatment unit, which is used to receive sludge. The sludge flows from the top to the bottom of the sludge treatment unit, and the heat source and oxidation medium transported from the industrial furnace preparation unit flow from the bottom to the top of the sludge treatment unit. By flowing the exhaust gas and sludge in opposite directions, the sludge undergoes sequential drying, pyrolysis, and activation stages during the flow to obtain activated sludge coal. The sludge treatment unit also includes an adsorbent preparation unit, which prepares an adsorbent using activated sludge coal. It includes a dust removal unit, which is connected to the industrial furnace / kettle manufacturing unit, and the dust removal unit can remove exhaust gas transported from the industrial furnace / kettle manufacturing unit. The system includes a multi-contamination coordinated control unit, which includes a filling device, a spraying device, a defog section, an adsorption section, an absorbent liquid circulation unit, a compounding unit, and a tailwater treatment unit, with the filling device, spraying device, defog section, and adsorption section arranged in sequence, and the exhaust gas transported from the dust removal unit flowing sequentially through the filling device, spraying device, defog section, and adsorption section. Both the compounding unit and the tailwater treatment unit are connected to the absorbent liquid circulation unit. The compounding unit is used to prepare the absorbent liquid and supply it to the absorbent liquid circulation unit. The absorbent liquid circulation unit is used to supply the absorbent liquid to the spraying device for circulation. The spraying device is used to spray the absorbent liquid to remove particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. The taillime processing unit is used to receive saturated adsorbent taillime sprayed from the spraying device, and the adsorbent preparation unit supplies the adsorbent to the taillime processing unit, and F in the saturated adsorbent taillime. - Cl - SO4 2- NO3 - It adsorbs heavy metal ions and organic matter, and the absorbent liquid adsorbed by the adsorbent is transported to an absorbent liquid circulation unit for reuse. The adsorbent preparation unit supplies the adsorbent to the adsorption section, and through the adsorbent, adsorbs fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. The adsorbent preparation unit supplies the adsorbent to the industrial furnace manufacturing unit, where some fluorides, HCl, heavy metals, and dioxins are removed on-site. Includes an exhaust unit for discharging exhaust gas that has passed through an adsorption segment,
[0006] Preferably, the sludge treatment unit is provided with a sludge inlet, a first exhaust gas inlet, a pyrolysis gas outlet, and a sludge coal outlet, and the industrial furnace kiln manufacturing unit is provided with an exhaust pipe and an inlet pipe, the first exhaust gas inlet is connected to the exhaust pipe and the pyrolysis gas outlet is connected to the inlet pipe, sludge enters the sludge treatment unit from the sludge inlet, the sludge undergoes pyrolysis to generate CO, CH4 and tar, CO, CH4 and tar are transported as fuel to the industrial furnace kiln manufacturing unit from the pyrolysis gas outlet, and the exhaust gas generated in the industrial furnace kiln manufacturing unit is transported from the exhaust pipe to the sludge treatment unit and the dust removal unit, respectively.
[0007] Preferably, a carbonization chamber is provided inside the sludge treatment unit, and the carbonization chamber is connected to a sludge inlet, a first exhaust gas inlet, a pyrolysis gas outlet, and a sludge coal outlet. Multiple rotating grates are provided in the center of the carbonization chamber, distributed at intervals from the bottom to the top of the sludge treatment unit, and multiple fixed grates are provided on the inner wall of the sludge treatment unit, distributed at intervals from the bottom to the top of the sludge treatment unit. The areas of both the fixed grates and the rotating grates are smaller than the cross-sectional area inside the sludge treatment unit, and they are distributed alternately with intervals between them, and both the fixed grates and the rotating grates are provided to be inclined.
[0008] Preferably, the adsorbent preparation unit is connected to the sludge outlet and used to receive activated sludge, the industrial furnace kiln manufacturing unit is provided with a combustion section and an adsorbent injection port, the combustion section is connected to an exhaust pipe and an inlet pipe, the adsorbent injection port corresponds to the combustion section, the adsorption section is provided with a first adsorbent inlet, the taillime treatment unit is provided with a second adsorbent inlet, and the adsorbent preparation unit is connected to the adsorbent injection port, the first adsorbent inlet and the second adsorbent inlet, respectively.
[0009] Preferably, the method for producing the adsorbent involves producing hydroxyapatite, surface-treating the hydroxyapatite, and supporting the surface-treated hydroxyapatite on activated sludge to obtain the adsorbent. Here, hydroxyapatite is produced by chemical precipitation, hydrothermal synthesis, solid-phase reaction, or mechanical chemical ball milling. Here, the surface treatment method for hydroxyapatite involves using a composite material of citric acid and sodium dodecylbenzenesulfonate, with a mass ratio of citric acid to sodium dodecylbenzenesulfonate of 1-5:5-12, and surface modification is performed on the hydroxyapatite using the composite material. In this case, the method for supporting surface-treated hydroxyapatite on activated sludge involves using an infiltration method or a mechanical chemical ball mill to support surface-modified hydroxyapatite on activated sludge to obtain granular adsorbent, or by preparing activated sludge into a honeycomb, columnar, or plate-shaped activated sludge, and then supporting surface-modified hydroxyapatite on the activated sludge by an immersion method to obtain adsorbent.
[0010] Preferably, the filling device is provided with a dust removal exhaust gas inlet, the dust removal exhaust gas inlet is connected to a dust removal unit, and the filling material is a ceramic filling material or a stainless steel filling material. The spraying device includes a spraying pipe positioned laterally and a nozzle attached to the spraying pipe, and the spraying pipe is connected to an absorbent liquid circulation unit. The defog removal section includes a defog device and an adsorbent. The defog device is shaped like a corrugated plate, and the adsorbent is placed on the surface of the defog device. The adsorbent is activated sludge coal. The adsorption section employs an adsorbent, with a residence time of 0.5 to 10 seconds for the exhaust gas and an adsorption reaction temperature of 30 to 60°C.
[0011] Preferably, the dust removal unit has a tower or box structure, and removes exhaust gas flowing through the dust removal unit using an electrostatic dust collection or cyclone dust collection method. A second exhaust gas inlet and exhaust gas outlet are symmetrically provided on the side wall of the dust removal unit, the second exhaust gas inlet is connected to an exhaust pipe, and the exhaust gas outlet is connected to the dust removal exhaust gas inlet.
[0012] Preferably, the adsorbent contains the following components in mass percentage: 0.3-8% alkali, 0.2-6% oxidizing agent, 0.01-2% activating additive, 0.01-1% auxiliary agent, 0.01-1% electrolyte, and the remainder water.
[0013] Preferably, the alkali is one of calcium hydroxide, sodium hydroxide, or sodium carbonate; the oxidizing agent is one of sodium persulfate, potassium permanganate, or hydrogen peroxide solution; the activating additive is one or more of potassium palmitate, sodium dodecylbenzenesulfonate, and the active ingredient; the auxiliary agent is one or more of p-toluenesulfonate sodium, xylenesulfonate sodium, 4-propan-2-ylbenzenesulfonate sodium, 1-hydroxy-2-naphthoate, or sodium sulfate 2-ethylhexyl; and the electrolyte is one of calcium sulfate, potassium sulfate, or sodium acetate.
[0014] A process for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, employing a system for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, and comprising the following steps: The exhaust gas from the industrial furnace manufacturing unit is introduced into the sludge treatment unit as a heat source and oxidation medium. The sludge treatment unit dries, thermally decomposes, and activates the sludge using exhaust gas to obtain combustible gas, tar, and activated sludge coal. The process involves returning the combustible gas and tar to the industrial furnace as fuel, and simultaneously sending the activated sludge to the adsorbent preparation unit. The adsorbent preparation unit uses activated sludge coal as a carrier, and the adsorbent is prepared by supporting surface-treated hydroxyapatite on the sludge coal. The adsorbent is blown into the industrial furnace and kiln manufacturing unit or directly mixed into the products of the industrial furnace and kiln manufacturing unit, and the adsorbent is further transported to the adsorption section and tailwater purification unit of the multi-contaminant cooperative control unit, where the adsorbent removes some fluorides, HCl, heavy metals and dioxins in situ within the industrial furnace and kiln manufacturing unit. The exhaust gas pollutants generated in industrial furnaces are transported to a multi-pollutant collaborative control unit. First, dust is removed. The filling device, spraying device, dispensing unit, absorption liquid circulation unit, and tail liquid treatment unit constitute a thermally induced phase separation adsorption section. Through the thermally induced phase separation adsorption section, thermally induced phase separation adsorption is carried out. Specifically, the absorption liquid is sprayed using the spraying device to remove particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances in the exhaust gas. After removing the water vapor in the exhaust gas through the demisting section, it enters the adsorption section, and the adsorbent in the adsorption section is used to further remove fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances. The saturated adsorption tail liquid by thermally induced phase separation adsorption enters the tail liquid treatment unit. Under the action of the adsorbent, F in the saturated adsorption tail liquid - , Cl - , SO4 2- , NO3 - , heavy metal ions, and organic substances are removed. The purified absorption liquid re-enters the absorption liquid circulation unit for recycling.
[0015] The technical principle of the present invention is that in the sludge treatment unit, the sludge moves on the inclined fire grate with 6 layers from top to bottom. The high-temperature exhaust gas transported from the industrial furnace manufacturing unit flows in the opposite direction to the sludge from bottom to top. The temperature of the high-temperature exhaust gas is 700 - 900 °C. The sludge undergoes sequential drying (100 - 250 °C), thermal decomposition (250 - 700 °C), and activation stage (700 - 900 °C) during the movement. The high-temperature incineration exhaust gas contains oxidation media such as O2, H2O, and CO2, which can effectively activate the sludge carbon generated in the thermal decomposition stage. Combustible gases such as CO and CH4 generated in the thermal decomposition stage, tar, and combustible gases such as H2 and CO generated in the activation stage enter the industrial furnace manufacturing unit and replace part of the fuel in the industrial furnace manufacturing unit.
[0016] Since hydroxyapatite has strong ion exchange ability, the calcium ions on its surface are easily replaced by heavy metal ions such as Cd 2+ , Pb 2+ , Hg 2+ , etc. OH - is F- Cl - SO4 2- NO3 - It is easily replaced by anions such as PO4 3- It can be substituted with a trivalent anion, and the phosphorus compound can suppress the generation of dioxins by passivation metal catalysts. Surface treatment increases the dispersibility of hydroxyapatite, increases the number of surface-activated functional groups, and improves compatibility with the organic phase. After activation, the specific surface area of the sludge coal increases, it becomes rich in activated functional groups, and is a good material as a carrier. By supporting surface-treated hydroxyapatite (forming ASC / HAP-S, where ASC / HAP-S is an adsorbent) using activated sludge coal, aggregation of hydroxyapatite can be avoided, it can be distributed uniformly, and more adsorption active sites can be released. ASC / HAP-S simultaneously removes multiple contaminants such as heavy metals, fluorides, chlorides, VOCs, dioxins, and malodorous substances from exhaust gas in the furnace of industrial furnace manufacturing units and in the adsorption section of multi-pollutant cooperative control units. ASC / HAP-S also adsorbs F in saturated adsorption taillime. - Cl - SO4 2- NO3 - It can remove major contaminants such as heavy metal ions and organic matter, enabling the purification and recycling of tailwater. The adsorbent reduces the interfacial tension between contaminants and the absorbent through acid-base neutralization reactions, oxidation-reduction reactions, chemical precipitation, diffusion-dissolution processes, and the "like dissolves like" principle, suppressing the formation of liquid crystal phases and playing a role as a cleaning aid. At the same time, it can remove contaminants such as sulfur dioxide, fluoride, HCl, nitrogen oxides, heavy metals, VOCs, dioxins, and malodorous substances from exhaust gas. [Effects of the Invention]
[0017] In summary, the present invention has the following advantages: The present invention provides a system for reducing complex media coordinated pollution and carbon emissions used in the treatment of industrial furnace sludge. This system fully utilizes the heat energy of the exhaust gas from the industrial furnace to gradually dry, pyrolyze, and activate the sludge. The generated pyrolysis gas / tar and gaseous products from the activation stage are introduced into the furnace as fuel, replacing part or all of the coal / natural gas fuel. The production and activation of sludge coal are entirely based on the heat energy of the furnace exhaust gas and oxidizing components such as O2, CO2, and H2O, without requiring extra heat or activation media. The activated sludge coal is fully utilized in the production of an economical and highly efficient multi-functional carbon-based adsorbent ASC / HAP-S. It simultaneously removes multiple pollutants in the exhaust gas and saturated adsorption tailwater, achieving a removal rate of over 90% for exhaust gas particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances, meeting emission standards and achieving reductions in solid-gas-water complex media coordinated pollution and carbon emissions. By adopting the industrial furnace sludge treatment method of the present invention, it is possible to achieve the recycling of heat energy / materials from exhaust gas, detoxification and reduction of sludge volume and resource recovery, reuse of pollutants instead of waste, and interconnected environmental measures. The structure is compact, energy consumption is low, input costs are low, the technology is simple and easy to control, operation is stable and highly reliable, purification efficiency is high, and there is a synergistic effect in reducing pollution and carbon emissions. In addition to being usable for the treatment of municipal sludge in industrial furnaces, it can also be applied to the treatment of textile printing sludge, papermaking sludge, agricultural and forestry waste, livestock and poultry manure, and other industrial organic solid waste in industrial furnaces. [Brief explanation of the drawing]
[0018] [Figure 1] This is a schematic diagram of a system used in the treatment of industrial furnace sludge according to the present invention to reduce combined media pollution and carbon emissions. [Modes for carrying out the invention]
[0019] The present invention will be described in further detail below based on specific embodiments.
[0020] (Example 1) As shown in Figure 1, this is a system for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, The industrial furnace and kiln manufacturing unit 1 is used to produce exhaust gas and transport it to the sludge treatment unit 2 as a heat source and oxidation medium, and the remaining exhaust gas is transported to the dust removal unit 3. The system includes a sludge treatment unit 2, which is used to receive sludge. The sludge flows from the top to the bottom of the sludge treatment unit 2, and the heat source and oxidation medium transported from the industrial furnace preparation unit 1 flow from the bottom to the top of the sludge treatment unit 2. By flowing the exhaust gas and sludge in opposite directions, the sludge undergoes sequential drying, pyrolysis, and activation stages during the flow to obtain activated sludge coal. The sludge treatment unit 2 also has an adsorbent preparation unit 2-9, which prepares an adsorbent using activated sludge coal. It includes a dust removal unit 3, which is connected to the industrial furnace kiln manufacturing unit 1, and the dust removal unit 3 can remove exhaust gas transported from the industrial furnace kiln manufacturing unit 1. The multi-contamination coordinated control unit 4 includes a filling device 4-2, a spraying device 4-3, a de-fog section 4-4, an adsorption section 4-5, an absorbent liquid circulation unit 4-7, a compounding unit 4-6, and a tail liquid treatment unit 4-8. The filling device 4-2, spraying device 4-3, de-fog section 4-4, and adsorption section 4-5 are arranged in order, and the exhaust gas transported from the dust removal unit 3 flows sequentially to the filling device 4-2, spraying device 4-3, de-fog section 4-4, and adsorption section 4-5. Both the compounding unit 4-6 and the tail liquid treatment unit 4-8 are connected to the absorbent liquid circulation unit 4-7. The compounding unit 4-6 is used to prepare the absorbent liquid and supply it to the absorbent liquid circulation unit 4-7. The absorbent liquid circulation unit 4-7 is used to supply the absorbent liquid to the spraying device 4-3 for circulation. The spraying device 4-3 is used to spray the absorbent liquid to remove particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. The taillime processing unit 4-8 is used to receive the saturated adsorbent taillime sprayed from the spraying device 4-3, and the adsorbent preparation unit 2-9 supplies the adsorbent to the taillime processing unit 4-8, and F in the saturated adsorbent taillime. - Cl - SO4 2- NO3 - It adsorbs heavy metal ions and organic matter, and the absorbent liquid adsorbed by the adsorbent is transported to the absorbent liquid circulation unit 4-7 for circulation and reuse. The taillime treatment unit 4-8 uses granular ASC / HAP-S adsorbent, with the adsorbent placed in a single container as the treatment medium. The amount of adsorbent used is 100-2000 g / ton of water, the treatment temperature is 10-50°C, and the stirring speed is 60-300 revolutions per minute. The adsorbent preparation unit 2-9 supplies the adsorbent to the adsorption section 4-5, and adsorbs fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances in the exhaust gas through the adsorbent. The adsorbent preparation unit 2-9 supplies the adsorbent to the industrial furnace manufacturing unit 1, where some fluorides, HCl, heavy metals, and dioxins are removed. Includes an exhaust unit for discharging exhaust gas that has passed through adsorption segments 4-5,
[0021] The multi-pollutant cooperative control unit 4 has a tower structure, with a dust removal exhaust gas inlet 4-1 located at the bottom of the tower's side wall, and an absorbent liquid circulation unit 4-7 also provided at the bottom of the tower's side wall. The multi-pollutant cooperative control unit 4 is also provided with a purified exhaust gas outlet 4-11, which is located at the top of the tower and corresponds to the adsorption segment 4-5. The purified exhaust gas outlet 4-11 is connected to the exhaust gas unit. Specifically, the exhaust unit includes an exhaust duct 5 and a blower 5-1, the purified exhaust gas outlet 4-11 is connected to the exhaust duct 5, and the blower 5-1 is provided at the connection point between the exhaust duct 5 and the purified exhaust gas outlet 4-11.
[0022] By installing the above system, the heat energy and oxidation medium of the exhaust gas from the industrial furnace manufacturing unit 1 are fully utilized, and the exhaust gas and sludge are made to flow in opposite directions. As a result, the sludge undergoes sequential drying, thermal decomposition, and activation stages during the flow process, thereby achieving detoxification, volume reduction, and resource recovery of the sludge.
[0023] The sludge treatment unit 2 is equipped with a sludge inlet 2-1, a first exhaust gas inlet 2-6, a pyrolysis gas outlet 2-7, and a sludge coal outlet 2-5. The industrial furnace kiln manufacturing unit 1 is equipped with an exhaust pipe 1-2 and an inlet pipe 1-1. The first exhaust gas inlet 2-6 is connected to the exhaust pipe 1-2, and the pyrolysis gas outlet 2-7 is connected to the inlet pipe 1-1. Sludge enters the sludge treatment unit 2 from the sludge inlet 2-1, where it undergoes pyrolysis to generate CO, CH4, and tar. The CO, CH4, and tar are transported as fuel to the industrial furnace kiln manufacturing unit 1 from the pyrolysis gas outlet 2-7. The exhaust gas generated in the industrial furnace kiln manufacturing unit 1 is transported from the exhaust pipe 1-2 to the sludge treatment unit 2 and the dust removal unit 3, respectively. Specifically, the exhaust pipe 1-2 is equipped with a flow control valve 1-5, which allows the flow rate of the exhaust gas to be adjusted.
[0024] A carbonization chamber 2-2 is provided inside the sludge treatment unit 2, and the carbonization chamber 2-2 is connected to a sludge inlet 2-1, a first exhaust gas inlet 2-6, a pyrolysis gas outlet 2-7, and a sludge coal outlet 2-5. Multiple rotating grates 2-3 are provided at intervals from the bottom to the top of the sludge treatment unit 2 in the center of the carbonization chamber 2-2, and multiple fixed grates 2-4 are provided on the inner wall of the sludge treatment unit 2, also at intervals from the bottom to the top of the sludge treatment unit 2. The areas of both the fixed grates 2-4 and the rotating grates 2-3 are smaller than the area of the cross-section inside the sludge treatment unit 2, and they are alternately distributed with intervals between them, and both the fixed grates 2-4 and the rotating grates 2-3 are provided to be inclined. The sludge entering sludge treatment unit 2 has a moisture content of 60-80%, a particle size of 1-20 mm, an exhaust gas temperature of 700-900°C, a residence time of 1-10 hours, and a specific surface area of 60-600 m² of the generated activated sludge coal. 2The ratio is / g. Specifically, the sludge treatment unit 2 has a tower structure, the exhaust gas inlet is located at the bottom of the tower's side wall, the pyrolysis gas outlet 2-7 is located at the top of the tower's side wall, a rotating shaft is installed in the center of the carbonization chamber 2-2, there are three rotating grates 2-3, the three rotating grates 2-3 are fixed to the rotating shaft at equal intervals, the connection point between the rotating grates 2-3 and the rotating shaft is higher than the position of the rotating grates 2-3 away from the rotating shaft, allowing the sludge to slide down along the rotating grates 2-3. There are three fixed grates 2-4, each fixed grate 2-4 has an annular structure, one side is fixedly connected to the inner wall of the sludge treatment unit 2, and the other side is angled downwards. The rotating grates 2-3 and fixed grates 2-4 are angled downwards at an inclination angle of 5-30° from the horizontal plane, and the rotation speed of the rotating grates 2-3 is 10-300 revolutions per hour.
[0025] The adsorbent preparation unit 2-9 is connected to the sludge outlet 2-5 and used to receive activated sludge. The industrial furnace kiln manufacturing unit 1 is equipped with a combustion section 1-3 and an adsorbent injection port 1-4. The combustion section 1-3 is connected to the exhaust pipe 1-2 and the inlet pipe 1-1, respectively. The adsorbent injection port 1-4 corresponds to the combustion section 1-3. The adsorption section 4-5 is equipped with a first adsorbent inlet 4-9. The taillime treatment unit 4-8 is equipped with a second adsorbent inlet 4-10. The adsorbent preparation unit 2-9 is connected to the adsorbent injection port 1-4, the first adsorbent inlet 4-9, and the second adsorbent inlet 4-10, respectively. Specifically, the adsorbent preparation unit 2-9 is connected to the sludge outlet 2-5 via a conveyor 2-8 and transports the sludge via the conveyor 2-8.
[0026] Specifically, the adsorbent is hydroxyapatite supported on activated sludge after surface treatment, with the chemical formula ASC / HAP-S, where the mass percentage of activated carbon is 60-90%. The adsorbent is manufactured by producing hydroxyapatite, surface treating the hydroxyapatite, and supporting the surface-treated hydroxyapatite on activated sludge to obtain the adsorbent. The molecular formula of hydroxyapatite is Ca 10-z (HPO4) z (PO4) 6-z (OH) 2-zHere, 0 ≤ z ≤ 1. The hydroxyapatite was produced by chemical precipitation, hydrothermal synthesis, solid-phase reaction, or mechanical chemical ball mill. The calcium salt precursors for producing hydroxyapatite by chemical precipitation are Ca(NO3)2·4H2O, Ca(OH)2, CaHPO4·2H2O, CaO, CaCl2, or Ca(OC2H5)2, and the phosphate precursors are (NH4)2HPO4, H3PO4, NaH2PO4, or (CH3O)3PO. The surface treatment method for hydroxyapatite involves using a composite material of citric acid and sodium dodecylbenzenesulfonate, with a mass ratio of citric acid to sodium dodecylbenzenesulfonate of 1-5:5-12, and surface modification is performed on the hydroxyapatite using the composite material. Granular ASC / HAP-S adsorbent can be obtained by supporting surface-modified hydroxyapatite on activated sludge using an infiltration method or a mechanical chemical ball mill, or by preparing activated sludge into a honeycomb, columnar, or plate-shaped activated sludge, and then supporting surface-modified hydroxyapatite on the activated sludge by an immersion method to obtain a one-piece ASC / HAP-S adsorbent.
[0027] Adsorption sections 4-5 employ either a single-piece or granular ASC / HAP-S adsorbent, with a residence time of 0.5-10 seconds for the exhaust gas in adsorption sections 4-5 and an adsorption reaction temperature of 30-60°C.
[0028] The multi-pollutant cooperative control unit 4 is provided with a dust removal exhaust gas inlet 4-1, which corresponds to the packing material 4-2. The dust removal exhaust gas inlet 4-1 is located at the bottom of the side wall of the multi-pollutant cooperative control unit 4 (tower body), and the dust removal exhaust gas inlet 4-1 is connected to the dust removal unit 3. The packing material 4-2 is either a ceramic packing material 4-2 or a stainless steel packing material 4-2.
[0029] The spraying device 4-3 includes a spraying pipe provided horizontally and a nozzle provided on the spraying pipe, and the spraying pipe is connected to the absorbent liquid circulation unit 4-7. The defog removal section 4-4 includes a defog unit and an adsorbent. The defog unit is in the shape of a corrugated plate and is made of polymer material or stainless steel. The adsorbent is provided on the surface of the defog unit and is made of activated sludge. The dust removal unit 3 has a tower or box structure and has a dust removal chamber 3-2. The second exhaust gas inlet 3-1 and exhaust gas outlet 3-3 are both connected to the dust removal chamber 3-2. Exhaust gas flowing through the dust removal unit 3 is removed from the dust removal chamber 3-2 using an electrostatic dust collection or cyclone dust collection method. The second exhaust gas inlet 3-1 and exhaust gas outlet 3-3 are symmetrically provided on the side wall of the dust removal unit 3. The second exhaust gas inlet 3-1 is connected to the exhaust pipe 1-2, and the exhaust gas outlet 3-3 is connected to the dust removal exhaust gas inlet 4-1.
[0030] The adsorbent contains the following components in mass percentage: 0.3-8% alkali, 0.2-6% oxidizing agent, 0.01-2% activating additive, 0.01-1% auxiliary agent, 0.01-1% electrolyte, and the remainder is water.
[0031] The alkali is one of calcium hydroxide, sodium hydroxide, or sodium carbonate; the oxidizing agent is one of sodium persulfate, potassium permanganate, or hydrogen peroxide solution; the activating additive is one or more of potassium palmitate, sodium dodecylbenzenesulfonate, and the active ingredient; the auxiliary agent is one or more of p-toluenesulfonate sodium, xylenesulfonate sodium, 4-propan-2-ylbenzenesulfonate sodium, 1-hydroxy-2-naphthoate, or sodium sulfate 2-ethylhexyl; and the electrolyte is one of calcium sulfate, potassium sulfate, or sodium acetate.
[0032] The absorbent liquid circulation unit 4-7 mainly includes a circulating water pump that supplies the absorbent liquid from the absorbent liquid circulation unit to the spraying device 4-3.
[0033] The structure of dispensing unit 4-6 is the same as the adsorbent preparation storage system described in patent document CN111375300A, and is used for the preparation of adsorbents.
[0034] (Example 2) This embodiment provides a process for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, employing a system for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, and includes the following steps: The exhaust gas from the industrial furnace manufacturing unit is introduced into the sludge treatment unit as a heat source and oxidation medium. The sludge treatment unit dries, thermally decomposes, and activates the sludge using exhaust gas to obtain combustible gas, tar, and activated sludge coal. The process involves returning the combustible gas and tar to the industrial furnace as fuel, and simultaneously sending the activated sludge to the adsorbent preparation unit. The adsorbent preparation unit uses activated sludge coal as a carrier, and the adsorbent is prepared by supporting surface-treated hydroxyapatite on the sludge coal. The adsorbent is blown into the industrial furnace and kiln manufacturing unit or directly mixed into the products of the industrial furnace and kiln manufacturing unit, and the adsorbent is further transported to the adsorption section and tailwater purification unit of the multi-contaminant cooperative control unit, where the adsorbent removes some fluorides, HCl, heavy metals and dioxins in situ within the industrial furnace and kiln manufacturing unit. The exhaust gas contaminants generated in the industrial furnace are transported to a multi-pollutant cooperative control unit, where dust is first removed. The filling unit, spraying unit, compounding unit, absorbent liquid circulation unit, and tailwater treatment unit constitute a thermally induced phase separation adsorption section. Thermally induced phase separation adsorption is performed through this section. Specifically, the absorbent liquid is sprayed using the spraying unit to remove particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. After removing water vapor from the exhaust gas via the defog section, the material enters the adsorption section, where adsorbents are used to further remove fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances. The saturated adsorbed taillime obtained by thermally induced phase separation adsorption enters the taillime processing unit, and under the action of the adsorbent, F in the saturated adsorbed taillime is released. - Cl - SO4 2- NO3 -The process includes the steps of removing heavy metal ions and organic matter, and then returning the purified absorbent solution to the absorbent solution circulation unit for reuse.
[0035] Some aspects of this embodiment that are not mentioned are the same as in Example 1.
[0036] (Application Example 1) In a brick kiln, sludge with a moisture content of 80% is processed, and high-temperature exhaust gas at 800°C is introduced into a sludge treatment unit. After 4 hours of sludge treatment, the specific surface area is 238 m². 2 / g of activated sludge is obtained, and the activated sludge is used to create a granular ASC / HAP-S adsorbent (using Ca(NO3)2·4H2O and (NH4)2HPO4 as precursors, hydroxyl apatite is prepared by the chemical precipitation method described in "The effect of the micromorphology of nano-hydroxyl apatite on the superhydrophobic layer performance and stability of wood surfaces" (https: / / doi.org / 10.13801 / j.cnki.fhclxb.20240722.001), the hydroxyl apatite is surface modified using a composite material of citric acid and sodium dodecylbenzenesulfonate in a mass ratio of 2:5, and the surface modified hydroxyl apatite is supported on activated sludge by a mechanical chemical ball mill method) and an integrated ASC / HAP-S adsorbent (activated sludge is formed into a columnar shape, and hydroxyl apatite surface modified by the immersion method is supported on the sludge). The initial concentration of industrial furnace exhaust gas pollutants was 488 mg / m³ of particulate matter. 3 , sulfur dioxide 290 mg / m³ 3 , nitrogen oxides 390 mg / m² 3 Fluoride 10 mg / m² 3 HCl 48 mg / m³ 3 , heavy metals 1.2mg / m 3 VOCs 8.2 mg / m² 3 , dioxin 0.16 ngTEQ / m 3The odor concentration was 4168 (dimensionless). The furnace was treated with granular ASC / HAP-S adsorbent (the adsorbent was mixed into the brick mixture as one of the raw materials), electrostatic dust removal, and then the adsorption section was treated in the order of adsorption of a multi-effect adsorbent consisting of "5% sodium hydroxide, 2% sodium persulfate, 0.05% sodium dodecylbenzenesulfonate, 0.05% sodium p-toluenesulfonate, 0.05% calcium sulfate, and 92.85% water" followed by adsorption of a honeycomb-shaped ASC / HAP-S adsorbent. The liquid-gas ratio in the adsorption section was 80 L / m³. 3 The adsorption reaction temperature was 60°C, the amount of ASC / HAP-S adsorbent used for tailwater treatment was 200 grams / ton of water, the treatment temperature was 40°C, the stirring speed was 60 revolutions / minute, the residence time in the adsorption section was 5 seconds, the adsorption reaction temperature was 40°C, and the exhaust gas emission concentration after purification was 25 mg / m³ of particulate matter. 3 , sulfur dioxide 12 mg / m³ 3 , nitrogen oxides 28 mg / m² 3 Fluoride 0.5 mg / m² 3 HCl 1 mg / m³ 3 , heavy metals 0.1mg / m 3 VOCs 0.8 mg / m² 3 , dioxin 0.01 ng TEQ / m 3 Odor concentration 309 (dimensionless), removal rate of each contaminant over 90%.
[0037] (Application Example 2) A brick kiln processes sludge with a moisture content of 80%, and the high-temperature exhaust gas at 900°C is introduced into a sludge treatment unit. After 6 hours of sludge treatment, the specific surface area is 398 m². 2 / g of activated sludge is obtained, and the activated sludge is used to create a granular ASC / HAP-S adsorbent (using Ca(NO3)2·4H2O and (NH4)2HPO4 as precursors, hydroxyl apatite is prepared by the chemical precipitation method described in "The effect of the micromorphology of nanohydroxyl apatite on the superhydrophobic layer performance and stability of wood surfaces" (https: / / doi.org / 10.13801 / j.cnki.fhclxb.20240722.001), the hydroxyl apatite is surface modified using a composite material of citric acid and sodium dodecylbenzenesulfonate in a mass ratio of 3:5, and the surface modified hydroxyl apatite is supported on activated sludge by a mechanical chemical ball mill method) and an integrated ASC / HAP-S adsorbent (activated sludge is formed into a columnar shape, and hydroxyl apatite surface modified by the immersion method is supported on the sludge). The initial concentration of industrial furnace exhaust gas pollutants was 379 mg / m³ of particulate matter. 3 , sulfur dioxide 170 mg / m³ 3 , nitrogen oxides 321 mg / m² 3 Fluoride 8 mg / m² 3 HC32mg / m² 3 , heavy metals 0.8mg / m 3 VOCs 7.9 mg / m² 3 , dioxin 0.12 ngTEQ / m 3 The odor concentration was 5495 (dimensionless). The furnace was treated with granular ASC / HAP-S adsorbent (the adsorbent was mixed into the brick mixture as one of the raw materials), electrostatic dust removal, and then the adsorption section was treated in the order of adsorption of a multi-effect adsorbent consisting of "6% sodium hydroxide, 3% hydrogen peroxide, 0.05% sodium dodecylbenzenesulfonate, 0.05% sodium xylenesulfonate, 0.05% sodium acetate, and 90.85% water" followed by adsorption of a honeycomb-shaped ASC / HAP-S adsorbent. The liquid-to-gas ratio in the adsorption section was 80 L / m³. 3 The adsorption reaction temperature was 60°C, the amount of ASC / HAP-S adsorbent used for tailwater treatment was 200 grams / ton of water, the treatment temperature was 40°C, the stirring speed was 60 revolutions / minute, the residence time in the adsorption section was 5 seconds, the adsorption reaction temperature was 40°C, and the exhaust gas emission concentration after purification was 17 mg / m³ of particulate matter. 3 , sulfur dioxide 10 mg / m² 3 , nitrogen oxides 30 mg / m² 3 Fluoride 0 mg / m³ 3HCl 0 mg / m³ 3 , heavy metals 0.05mg / m 3 VOCs 0.5 mg / m² 3 , dioxin 0.01 ng TEQ / m 3 Odor concentration 309 (dimensionless), removal rate of each contaminant over 90%.
[0038] (Application Example 3) A brick kiln processes sludge with a moisture content of 80%, and the high-temperature exhaust gas at 900°C is introduced into a sludge treatment unit. After 8 hours of sludge treatment, the specific surface area is 366 m². 2 / g of activated sludge is obtained, and the activated sludge is used to create a granular ASC / HAP-S adsorbent (using Ca(NO3)2·4H2O and (NH4)2HPO4 as precursors, hydroxyl apatite is prepared by the chemical precipitation method described in "The effect of the micromorphology of nanohydroxyl apatite on the superhydrophobic layer performance and stability of wood surfaces" (https: / / doi.org / 10.13801 / j.cnki.fhclxb.20240722.001), the hydroxyl apatite is surface modified using a composite material of citric acid and sodium dodecylbenzenesulfonate in a mass ratio of 3:5, and the surface modified hydroxyl apatite is supported on activated sludge by a mechanical chemical ball mill method) and an integrated ASC / HAP-S adsorbent (activated sludge is formed into a columnar shape, and hydroxyl apatite surface modified by the immersion method is supported on the sludge). The initial concentration of industrial furnace exhaust gas pollutants was 358 mg / m³ of particulate matter. 3 , sulfur dioxide 206 mg / m³ 3 , nitrogen oxides 291 mg / m² 3 Fluoride 8 mg / m² 3 HC39mg / m² 3 , heavy metals 1mg / m 3 VOCs 10.3 mg / m² 3 , dioxin 0.22 ngTEQ / m 3, odor concentration 5495 (dimensionless), adsorption of granular ASC / HAP-S adsorbent in the furnace (the adsorbent is mixed into the brick blank as one of the raw materials), electrostatic dust removal, and treatment in the order of adsorption by the multi-effect adsorbent in the adsorption section of "4% calcium hydroxide + 4% sodium hydroxide, 3% hydrogen peroxide solution, 0.05% potassium palmitate, 0.05% sodium xylene sulfonate, 0.05% sodium acetate and 88.85% water" and adsorption by the honeycomb-shaped ASC / HAP-S adsorbent. The liquid-gas ratio in the adsorption section is 50 L / m 3 , the adsorption reaction temperature is 60 °C, the amount of ASC / HAP-S adsorbent used for tail liquid treatment is 200 grams / ton of water, the treatment temperature is 40 °C, the stirring speed is 100 revolutions per minute, the residence time in the adsorption section is 7 s, the adsorption reaction temperature is 40 °C, and the emission concentration of the purified exhaust gas is particulate matter 15 mg / m 3 , sulfur dioxide: 10 mg / m 3 , nitrogen oxides: 25 mg / m 3 , fluorides: 0 mg / m 3 , HCl: 0 mg / m 3 , heavy metals: 0.08 mg / m 3 , VOCs: 0.8 mg / m 3 , dioxin: 0.02 ng TEQ / m 3 , odor concentration 417 (dimensionless), removal rate of each pollutant is 90% or more.
[0039] (Comparative Example 1) Sludge with a moisture content of 80% is treated in a certain brick kiln, and high-temperature exhaust gas at 900 °C is introduced into the sludge treatment unit. After 6 hours of sludge treatment, activated sludge peat with a specific surface area of 398 m 2 / g is obtained. The initial concentration of industrial furnace kiln exhaust gas pollutants is particulate matter 392 mg / m 3 , sulfur dioxide: 234 mg / m 3 , nitrogen oxides: 198 mg / m 3 , fluorides: 8 mg / m 3 , HC: 28 mg / m 3 , heavy metals: 1.3 mg / m 3 , VOCs: 6.3 mg / m 3 , dioxin: 0.09 ng TEQ / m 3The odor concentration was 4168 (dimensionless), adsorption was performed on granular ASC / HAP-S adsorbent inside the furnace (the adsorbent was mixed into the brick mixture as one of the raw materials), electrostatic dust removal was performed, and the adsorption section was treated with an adsorbent of "6% calcium hydroxide, 6% sodium hydroxide, and 88% water," with a liquid-to-gas ratio of 80 L / m³. 3 The adsorption reaction temperature was 60°C, and the exhaust gas emission concentration after purification was 28 mg / m³ of particulate matter. 3 , sulfur dioxide 20 mg / m² 3 , nitrogen oxides 172 mg / m² 3 Fluoride 0 mg / m³ 3 HCl 0 mg / m³ 3 , heavy metals 0.1mg / m 3 VOCs 5.8 mg / m² 3 , dioxin 0.08 ng TEQ / m 3 Odor concentration 2344 (dimensionless), removal rate of each contaminant 50% or less.
[0040] While the embodiments described above are preferred embodiments of the present invention, the embodiments of the present invention are not limited to those described above. Any other modifications, alterations, substitutions, combinations, or simplifications made under the spirit and principles of the present invention must be equivalent substitutions that fall within the scope of protection of the present invention. [Explanation of Symbols]
[0041] 1. Industrial furnace kiln manufacturing unit; 1-1. Inlet pipe; 1-2. Exhaust pipe; 1-3. Combustion section; 1-4. Adsorbent injection port; 1-5. Flow control valve; 2. Sludge treatment unit; 2-1. Sludge inlet; 2-2. Carbonization chamber; 2-3. Rotating grate; 2-4. Fixed grate; 2-5. Sludge coal outlet; 2-6. First exhaust gas inlet; 2-7. Pyrolysis gas outlet; 2-8. Conveyor; 2-9. Adsorbent preparation unit; 3. Dust removal unit; 3-1. Second Exhaust gas inlet; 3-2, dust removal chamber; 3-3, exhaust gas outlet; 4, multi-contamination coordinated control unit; 4-1, dust removal exhaust gas inlet; 4-2, filling device; 4-3, spraying device; 4-4, misting section; 4-5, adsorption section; 4-6, compounding unit; 4-7, absorbent liquid circulation unit; 4-8, taillime treatment unit; 4-9, first adsorbent inlet; 4-10, second adsorbent inlet; 4-11, purified exhaust gas outlet; 5, exhaust duct; 5-1, blower.
Claims
1. A system for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, The industrial furnace and kiln manufacturing unit is included, and the exhaust gas from the industrial furnace and kiln manufacturing unit enters the sludge treatment unit as a heat source and oxidation medium, while the remaining exhaust gas is transported to the dust removal unit. The system includes a sludge treatment unit, which is used to receive sludge. The sludge flows from the top to the bottom of the sludge treatment unit, and the heat source and oxidation medium transported from the industrial furnace preparation unit flow from the bottom to the top of the sludge treatment unit. By flowing the exhaust gas and sludge in opposite directions, the sludge undergoes sequential drying, pyrolysis, and activation stages during the flow to obtain activated sludge coal. The sludge treatment unit also includes an adsorbent preparation unit, which prepares an adsorbent using activated sludge coal. It includes a dust removal unit, which is connected to the industrial furnace / kettle manufacturing unit, and the dust removal unit can remove exhaust gas transported from the industrial furnace / kettle manufacturing unit. The system includes a multi-contamination coordinated control unit, which includes a filling device, a spraying device, a defog section, an adsorption section, an absorbent liquid circulation unit, a compounding unit, and a tailwater treatment unit, with the filling device, spraying device, defog section, and adsorption section arranged in sequence, and the exhaust gas transported from the dust removal unit flowing sequentially through the filling device, spraying device, defog section, and adsorption section. Both the dispensing unit and the tailwater treatment unit are connected to the absorbent liquid circulation unit. The dispensing unit is used to prepare the absorbent liquid and supply it to the absorbent liquid circulation unit. The absorbent liquid circulation unit is used to supply the absorbent liquid to the spraying device for circulation. The spraying device is used to spray the absorbent liquid to remove particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. The taillime processing unit is used to receive saturated adsorbent taillime sprayed from the spraying device, and the adsorbent preparation unit supplies the adsorbent to the taillime processing unit, and F in the saturated adsorbent taillime. - , Cl - SO 4 2- NO 3 - It adsorbs heavy metal ions and organic matter, and the absorbent liquid adsorbed by the adsorbent is transported to an absorbent liquid circulation unit for reuse. The adsorbent preparation unit supplies the adsorbent to the adsorption section, and through the adsorbent, adsorbs fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. The adsorbent preparation unit supplies the adsorbent to the industrial furnace manufacturing unit, where some fluorides, HCl, heavy metals, and dioxins are removed on-site. A system for reducing combined media-mediated pollution and carbon emissions used in the treatment of industrial furnace sludge, characterized by comprising an exhaust unit for discharging exhaust gas that has passed through an adsorption segment.
2. The sludge treatment unit is equipped with a sludge inlet, a first exhaust gas inlet, a pyrolysis gas outlet, and a sludge coal outlet. The industrial furnace kiln manufacturing unit is equipped with an exhaust pipe and an inlet pipe. The first exhaust gas inlet is connected to the exhaust pipe, and the pyrolysis gas outlet is connected to the inlet pipe. Sludge enters the sludge treatment unit from the sludge inlet, and the sludge undergoes pyrolysis to produce CO and CH4. 4 It generates tar, CO, CH 4 A system for reducing combined media coordinated pollution and carbon emissions used in industrial furnace sludge treatment according to claim 1, characterized in that tar and other materials are transported as fuel from the pyrolysis gas outlet into the industrial furnace kiln manufacturing unit, and the exhaust gas generated in the industrial furnace kiln manufacturing unit is transported from the exhaust pipe to the sludge treatment unit and the dust removal unit, respectively.
3. The system for reducing combined media cooperative pollution and carbon emissions used in industrial furnace sludge treatment according to claim 1 is characterized in that a carbonization chamber is provided inside the sludge treatment unit, the carbonization chamber is connected to a sludge inlet, a first exhaust gas inlet, a pyrolysis gas outlet and a sludge coal outlet, multiple rotating grates are provided in the center of the carbonization chamber, distributed at intervals from the bottom to the top of the sludge treatment unit, multiple fixed grates are provided on the inner wall of the sludge treatment unit, distributed at intervals from the bottom to the top of the sludge treatment unit, the areas of both the fixed grates and the rotating grates are smaller than the area of the cross-section inside the sludge treatment unit, they are distributed alternately with intervals between them, and both the fixed grates and the rotating grates are provided to be inclined.
4. The system for reducing composite media coordinated pollution and carbon emissions used in industrial furnace sludge treatment according to claim 2, characterized in that an adsorbent preparation unit is used to receive activated sludge by connecting to a sludge outlet, the industrial furnace kiln manufacturing unit is provided with a combustion section and an adsorbent injection port, the combustion section is connected to an exhaust pipe and an inlet pipe, the adsorbent injection port corresponds to the combustion section, the adsorption section is provided with a first adsorbent inlet, the taillime treatment unit is provided with a second adsorbent inlet, and the adsorbent preparation unit is connected to an adsorbent injection port, a first adsorbent inlet and a second adsorbent inlet, respectively.
5. The method for producing the adsorbent involves producing hydroxyapatite, surface-treating the hydroxyapatite, and supporting the surface-treated hydroxyapatite on activated sludge to obtain the adsorbent. Here, hydroxyapatite is produced by chemical precipitation, hydrothermal synthesis, solid-phase reaction, or mechanical chemical ball milling. Here, the surface treatment method for hydroxyapatite involves using a composite material of citric acid and sodium dodecylbenzenesulfonate, with a mass ratio of citric acid to sodium dodecylbenzenesulfonate of 1 to 5:5 to 12, and surface modification is performed on the hydroxyapatite using the composite material. The method for supporting surface-treated hydroxyapatite on activated sludge is characterized in that a granular adsorbent is obtained by supporting surface-modified hydroxyapatite on activated sludge using an infiltration method or a mechanical chemical ball mill, or by preparing activated sludge into a honeycomb, columnar, or plate-shaped activated sludge, and then supporting surface-modified hydroxyapatite on the activated sludge by an immersion method to obtain an adsorbent, as described in 4, for use in the treatment of industrial furnace sludge, which reduces combined media-mediated pollution and carbon emissions.
6. The filling device is equipped with a dust removal exhaust gas inlet, which is connected to a dust removal unit, and the filling material is either ceramic or stainless steel. The spraying device includes a spraying pipe positioned laterally and a nozzle attached to the spraying pipe, and the spraying pipe is connected to an absorbent liquid circulation unit. The defog removal section includes a defog device and an adsorbent. The defog device is shaped like a corrugated plate, and the adsorbent is placed on the surface of the defog device. The adsorbent is activated sludge coal. The system for reducing combined media cooperative pollution and carbon emissions used in the treatment of industrial furnace sludge according to claim 1, characterized in that the adsorption section employs an adsorbent, the residence time of the exhaust gas in the adsorption section is 0.5 to 10 s, and the adsorption reaction temperature is 30 to 60°C.
7. The dust removal unit has a tower or box structure, removes exhaust gas flowing through the dust removal unit using an electrostatic dust collection or cyclone dust collection method, and a second exhaust gas inlet and exhaust gas outlet are symmetrically provided on the side wall of the dust removal unit, the second exhaust gas inlet is connected to an exhaust pipe, and the exhaust gas outlet is connected to the dust removal exhaust gas inlet, characterized in that it is a system for reducing combined media coordinated pollution and carbon emissions used in the treatment of industrial furnace sludge according to claim 6.
8. The adsorbent contains the following components in mass percentage: 0.3 to 8% alkali, 0.2 to 6% oxidizing agent, 0.01 to 2% activating additive, 0.01 to 1% auxiliary agent, 0.01 to 1% electrolyte, and the remainder is water, characterized in that it is a system for reducing combined media cooperative pollution and carbon emissions used in the treatment of industrial furnace sludge according to claim 1.
9. A system for reducing combined media coordinated pollution and carbon emissions used in the treatment of industrial furnace sludge according to claim 8, characterized in that the alkali is one of calcium hydroxide, sodium hydroxide, or sodium carbonate; the oxidizing agent is one of sodium persulfate, potassium permanganate, or hydrogen peroxide solution; the activating additive is one or more of potassium palmitate, sodium dodecylbenzenesulfonate, and an active ingredient; the auxiliary agent is one or more of p-toluenesulfonate sodium, xylenesulfonate sodium, 4-propan-2-ylbenzenesulfonate sodium, 1-hydroxy-2-naphthoate, or sodium sulfate 2-ethylhexyl; and the electrolyte is one of calcium sulfate, potassium sulfate, or sodium acetate.
10. A process for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge, A system for reducing combined media pollution and carbon emissions used in the treatment of industrial furnace sludge according to any one of claims 1 to 9 is employed, and includes the following steps: The exhaust gas from the industrial furnace manufacturing unit is introduced into the sludge treatment unit as a heat source and oxidation medium. The sludge treatment unit dries, thermally decomposes, and activates the sludge using exhaust gas to obtain combustible gas, tar, and activated sludge coal. The process involves returning the combustible gas and tar to the industrial furnace as fuel, and simultaneously sending the activated sludge to the adsorbent preparation unit. The adsorbent preparation unit uses activated sludge coal as a carrier, and the adsorbent is prepared by supporting surface-treated hydroxyapatite on the sludge coal. The process involves blowing the adsorbent into the industrial furnace manufacturing unit or directly mixing it into the products of the industrial furnace manufacturing unit, and then transporting the adsorbent to the adsorption section and tailwater purification unit of the multi-contaminant cooperative control unit, where the adsorbent removes some fluorides, HCl, heavy metals, and dioxins in situ within the industrial furnace manufacturing unit. The exhaust gas contaminants generated in the industrial furnace are transported to a multi-pollutant cooperative control unit, where dust is first removed. The filling unit, spraying unit, compounding unit, absorbent liquid circulation unit, and tailwater treatment unit constitute a thermally induced phase separation adsorption section. Thermally induced phase separation adsorption is performed through this section. Specifically, the absorbent liquid is sprayed using the spraying unit to remove particulate matter, sulfur dioxide, nitrogen oxides, fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances from the exhaust gas. After removing water vapor from the exhaust gas via the defog section, the material enters the adsorption section, where adsorbents are used to further remove fluorides, HCl, heavy metals, VOCs, dioxins, and malodorous substances. The saturated adsorption tail liquid by thermally induced phase separation adsorption enters the tail liquid treatment unit, and under the action of the adsorbent, F in the saturated adsorption tail liquid - , Cl - , SO 4 2- , NO 3 - , heavy metal ions and organic substances are removed, and the purified absorption liquid enters the absorption liquid circulation unit again for recycling. The process for reducing the composite medium coordinated pollution and carbon emission used in the industrial furnace kiln sludge treatment is characterized by including the above steps.