Multi-media synergistic pollution reduction and carbon reduction system and process for industrial furnace sludge disposal

Abstract

The present invention relates to a multi-media collaborative pollution reduction and carbon reduction system and process for treating sludge in industrial furnaces. The flue gas produced by the industrial furnace production unit is used as a heat source and an oxidizing medium. The sludge is dried, pyrolyzed, and activated in stages. The sludge pyrolysis gas, tar, and gaseous products of the activation stage replace part of the furnace fuel. While the sludge is being treated, an adsorbent is prepared for flue gas and tail liquid purification. The system is absorbed and adsorbed by a multi-pollutant collaborative control unit to achieve deep treatment of multiple pollutants in flue gas and purification and recycling of tail liquid, thereby achieving solid-gas-water multi-media collaborative pollution reduction and carbon reduction. The system and process of the present invention have the following effects: recycling of flue gas heat and materials, harmlessness, reduction, and resource utilization of sludge, achieving waste treatment with waste, with interconnected treatment functions and a compact structure. It has low energy consumption, low investment and operating costs, simple and easy-to-control process, stable and reliable operation, high purification efficiency, and synergistic effect of pollution reduction and carbon reduction. It belongs to the field of environmental engineering technology.

Description

Technical Field

[0001] The present invention relates to the field of environmental engineering technology, and in particular to a multi-media collaborative pollution reduction and carbon reduction system and process for treating sludge from industrial furnaces. Background Art

[0002] Municipal sludge is a by-product of urban domestic sewage treatment. It has a complex composition, high water and organic matter content, and contains pollutants such as heavy metals, toxic substances, and pathogenic microorganisms. If improperly handled, it will cause serious environmental pollution.

[0003] Currently, municipal sludge is mostly disposed of through landfill, aerobic composting, anaerobic digestion, incineration, and co-processing in industrial furnaces. Landfills occupy large areas, their capacity is increasingly depleted, sludge dewatering is costly, and there are environmental risks. Landfill processes no longer meet the requirements for harmless sludge disposal. While aerobic composting and anaerobic digestion can fully utilize the organic matter and nutrients contained in sludge, their long operation cycles and the inability to reduce or eliminate toxic heavy metals and persistent organic pollutants limit their resource utilization, hindering their development. Single sludge incineration requires the construction of a dedicated incinerator, which is costly, expensive, and poses the problem of secondary disposal of the residue. In recent years, the coordinated disposal of sludge and other solid wastes in industrial furnaces has become one of the important sludge disposal methods. Sludge can replace part of the fuel. Industrial furnaces can fully incinerate the organic matter in the sludge and have a relatively complete flue gas purification system. Compared with the incineration of sludge alone, the investment and operating costs are greatly reduced. However, due to the complex composition of sludge and the presence of heavy metals, chlorine and other harmful elements, when it is directly co-treated in industrial furnaces such as cement kilns and brick kilns, it will be enriched in cement, bricks and tiles and other products, affecting product quality, and also making the control of flue gas pollutants more difficult and costly. Summary of the Invention

[0004] In response to the technical problems existing in the prior art, the purpose of the present invention is to provide a multi-media collaborative pollution reduction and carbon reduction system and process for the treatment of sludge in industrial furnaces and kilns, so as to solve the problem that due to the complex composition of sludge and the presence of harmful elements such as heavy metals and chlorine, sludge and other solid wastes will be enriched in cement, bricks and tiles and other products when they are collaboratively treated in industrial furnaces such as cement kilns or brick kilns alone, affecting product quality and making the treatment of flue gas pollutants more difficult and costly.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-media collaborative pollution and carbon reduction system for industrial furnace sludge disposal, comprising:

[0007] Industrial furnace production unit: the flue gas from the industrial furnace production unit is used as a heat source and oxidizing medium to enter the sludge disposal unit, and the remaining flue gas is transported to the dust removal unit;

[0008] The sludge disposal unit is used to receive sludge, which flows from the top to the bottom of the sludge disposal unit. The heat source and oxidizing medium transmitted by the industrial furnace production unit flow from the bottom to the top of the sludge disposal unit. The flue gas and the sludge flow in the opposite direction, so that the sludge undergoes a drying stage, a pyrolysis stage and an activation stage in sequence during the flow process to obtain activated sludge carbon. The sludge disposal unit has an adsorbent preparation unit, which uses the activated sludge carbon to prepare adsorbent.

[0009] The dust removal unit is connected to the industrial furnace production unit and can remove dust from the flue gas transported by the industrial furnace production unit;

[0010] The multi-pollutant collaborative control unit includes a filler, a spray device, a demisting section, an adsorption section, an absorption liquid circulation unit, a dispensing unit, and a tail liquid treatment unit. The filler, spray device, demisting section, and adsorption section are arranged in sequence. The flue gas transported by the dust removal unit flows to the filler, spray device, demisting section, and adsorption section in sequence.

[0011] The dispensing unit and the tail liquid treatment unit are both connected to the absorption liquid circulation unit. The dispensing unit is used to manufacture absorbent and supply it to the absorption liquid circulation unit. The absorption liquid circulation unit is used to supply the absorption liquid to the spraying device for recycling. The spraying device sprays the absorption liquid to remove particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins and odorous substances in the flue gas;

[0012] The tail liquid treatment unit is used to receive the saturated absorption tail liquid sprayed by the spray device, and the adsorbent preparation unit supplies adsorbent to the tail liquid treatment unit to adsorb the F - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions and organic matter, and the absorption liquid after adsorption by the adsorbent is transported to the absorption liquid circulation unit for recycling;

[0013] The adsorbent preparation unit supplies adsorbent to the adsorption section, which adsorbs fluoride, HCl, heavy metals, VOCs, dioxins and odorous substances in the flue gas;

[0014] The adsorbent preparation unit supplies adsorbent to the industrial furnace production unit to remove some fluorides, HCl, heavy metals and dioxins in situ;

[0015] The exhaust unit is used to discharge the flue gas after passing through the adsorption section.

[0016] As a preferred embodiment, the sludge disposal unit is provided with a sludge inlet, a first flue gas inlet, a pyrolysis gas outlet and a sludge charcoal outlet, and the industrial furnace production unit is provided with an outlet pipe and an inlet pipe, the first flue gas inlet is connected to the outlet pipe; the pyrolysis gas outlet is connected to the inlet pipe; the sludge enters the sludge disposal unit from the sludge inlet, and the sludge produces CO, CH4 and tar when undergoing pyrolysis, and the CO, CH4 and tar are transported from the pyrolysis gas outlet to the industrial furnace production unit as fuel; the flue gas produced by the industrial furnace production unit is transported from the outlet pipe to the sludge disposal unit and the dust removal unit respectively.

[0017] As a preferred embodiment, a carbonization chamber is provided inside the sludge disposal unit, which is respectively connected to the sludge inlet, the first flue gas inlet, the pyrolysis gas outlet and the sludge charcoal outlet. A plurality of rotating grates are provided in the center of the carbonization chamber and are spaced apart from the bottom to the top of the sludge disposal unit. A plurality of fixed grates are provided on the inner wall of the sludge disposal unit and are spaced apart from the bottom to the top of the sludge disposal unit. The areas of the fixed grates and the rotating grates are both smaller than the cross-sectional area inside the sludge disposal unit. The fixed grates and the rotating grates are alternately and staggeredly distributed, and the fixed grates and the rotating grates are both inclined.

[0018] As a preference, the adsorbent preparation unit is connected to the sludge charcoal outlet to receive activated sludge charcoal; the industrial furnace production unit is provided with a combustion section and an adsorbent injection port, the combustion section is respectively connected to the air inlet pipe and the air outlet pipe, the adsorbent injection port corresponds to the combustion section, the adsorption section is provided with a first adsorbent inlet, the tail liquid treatment unit is provided with a second adsorbent inlet, and the adsorbent preparation unit is respectively connected to the adsorbent injection port, the first adsorbent inlet and the second adsorbent inlet.

[0019] As a preferred method, the preparation method of the adsorbent is: preparing hydroxyapatite, surface-treating the hydroxyapatite, and loading the surface-treated hydroxyapatite on activated sludge carbon to obtain the adsorbent;

[0020] The preparation method of hydroxyapatite is: chemical precipitation method, hydrothermal synthesis method, solid phase reaction method or mechanochemical ball milling method;

[0021] The method for treating the surface of hydroxyapatite is as follows: using a compound substance of citric acid and sodium dodecylbenzene sulfonate, wherein the mass ratio of citric acid to sodium dodecylbenzene sulfonate is 1-5:5-12, and modifying the surface of hydroxyapatite by the compound substance;

[0022] Among them, the method of loading the surface-treated hydroxyapatite on the activated sludge carbon is: using the impregnation method or mechanical ball milling method to load the surface-modified hydroxyapatite on the activated sludge carbon to obtain a granular adsorbent; or preparing the activated sludge carbon into honeycomb, columnar or plate-shaped activated sludge carbon, and then loading the surface-modified hydroxyapatite on the activated sludge carbon by the impregnation method to obtain the adsorbent.

[0023] As a preferred embodiment, the filler is provided with a dust removal fume inlet, the dust removal fume inlet is connected to the dust removal unit, and the filler is a ceramic filler or a stainless steel filler;

[0024] The spraying device includes a horizontally arranged spraying pipe and a spray head arranged on the spraying pipe, and the spraying pipe is connected to the absorption liquid circulation unit;

[0025] The demisting section includes a demister and adsorption material. The demister is a corrugated plate type. The adsorption material is arranged on the surface of the demister. The adsorption material is activated sludge carbon.

[0026] The adsorption section uses adsorbent, the residence time of flue gas in the adsorption section is 0.5-10 s, and the adsorption reaction temperature is 30-60℃.

[0027] As a preferred embodiment, the dust removal unit is a tower or box structure, and electrostatic dust removal or cyclone dust removal is used to remove dust from the flue gas flowing through the dust removal unit. The dust removal unit is provided with a symmetrically distributed second flue gas inlet and flue gas outlet on the side wall. The second flue gas inlet is connected to the exhaust pipe, and the flue gas outlet is connected to the dust removal flue gas inlet.

[0028] As a preference, the absorbent is composed of the following components in percentage by mass: 0.3-8% alkali, 0.2-6% oxidant, 0.01-2% active additive, 0.01-1% auxiliary agent, 0.01-1% electrolyte and the balance water.

[0029] As a preferred embodiment, the base is any one of calcium hydroxide, sodium hydroxide, and sodium carbonate; the oxidant is any one of sodium persulfate, potassium permanganate, and hydrogen peroxide; the active additive is one or more of potassium hexadecanoate, sodium dodecylbenzenesulfonate, and active ingredients; the auxiliary agent is one or more of sodium toluenesulfonate, sodium xylenesulfonate, sodium isopropylbenzenesulfonate, sodium p-methylisopropylbenzenesulfonate, 1-hydroxy-2-naphthoate, 2-hydroxy-1-naphthalenesulfonate, and sodium 2-ethylhexyl sulfate; and the electrolyte is any one of calcium sulfate, potassium sulfate, and sodium acetate.

[0030] A multi-media collaborative pollution reduction and carbon reduction process for treating sludge from industrial furnaces and kilns, using a multi-media collaborative pollution reduction and carbon reduction system for treating sludge from industrial furnaces and kilns, comprising the following steps:

[0031] The flue gas from the industrial furnace production unit is used as a heat source and oxidizing medium to enter the sludge disposal unit;

[0032] The sludge disposal unit dries, pyrolyzes and activates the sludge through flue gas to obtain combustible gas, tar and activated sludge charcoal;

[0033] The combustible gas and tar are returned to the industrial kiln as fuel, while the activated sludge carbon is sent to the adsorbent preparation unit;

[0034] The adsorbent preparation unit uses activated sludge carbon as a carrier and loads surface-treated hydroxyapatite on the sludge carbon to prepare the adsorbent;

[0035] The adsorbent is sprayed into the industrial furnace production unit or directly mixed into the product of the industrial furnace production unit. The adsorbent is also transported to the adsorption section of the multi-pollutant coordinated control unit and the tail liquid purification unit. The adsorbent removes some fluoride, HCl, heavy metals and dioxins in situ within the industrial furnace production unit;

[0036] The flue gas pollutants generated by the industrial furnace are transported to the multi-pollutant coordinated control unit for dust removal. The wet absorption section is composed of a filler, a spraying device, a dispensing unit, an absorption liquid circulation unit and a tail liquid treatment unit. The wet absorption section is used for wet absorption. Specifically, the absorption liquid is sprayed by the spraying device to remove particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances in the flue gas. The water vapor in the flue gas is removed by the demisting section. The flue gas then enters the adsorption section, and the adsorbent in the adsorption section is used to further remove fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances.

[0037] The saturated absorption tail liquid produced by wet absorption enters the tail liquid treatment unit, where the F in the saturated absorption tail liquid is removed under the action of the adsorbent. - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions and organic matter, and the purified absorption liquid re-enters the absorption liquid circulation unit for recycling.

[0038] The technical principle of the present invention is: in the sludge disposal unit, the sludge moves from top to bottom on the six-layer downward-inclined grate, and the high-temperature flue gas introduced from the industrial furnace production unit flows from bottom to top in the opposite direction to the sludge. The temperature of the high-temperature flue gas is 700-900°C. During the movement, the sludge will successively undergo drying (100-250°C), pyrolysis (250-700°C) and activation stages (700-900°C). The high-temperature incineration flue gas contains oxidizing media such as O2, H2O, CO2, etc., which can effectively activate the sludge charcoal produced in the pyrolysis stage, while the combustible gases such as CO, CH4 and tar produced in the pyrolysis stage, and the combustible gases such as H2 and CO produced in the activation stage enter the industrial furnace production unit, replacing part of the fuel in the industrial furnace production unit.

[0039] Since hydroxyapatite has a strong ion exchange capacity, the calcium ions on its surface are easily absorbed by Cd 2+ , Pb 2+ 、Hg 2+ Heavy metal ion replacement, OH - Easy to be F - 、Cl -、SO4 2- 、NO3 - Anion exchange, PO4 3- It can be replaced by trivalent anions. Phosphorus-based compounds can inhibit the formation of dioxins by passivating metal catalysts. Surface treatment can enhance the dispersibility of hydroxyapatite, increase the number of surface active functional groups, and improve compatibility with organic phases. The activated sludge carbon has a larger specific surface area and is rich in active functional groups. It is a good carrier material. Using activated sludge carbon to load surface-treated hydroxyapatite (forming ASC / HAP-S, ASC / HAP-S is the adsorbent) can avoid hydroxyapatite agglomeration, make it evenly distributed, and release more adsorption active sites. ASC / HAP-S can simultaneously remove heavy metals, fluorides, chlorides, VOCs, dioxins, odorous substances and other pollutants in the flue gas in the furnace of the industrial furnace production unit and in the adsorption section of the multi-pollutant coordinated control unit. In addition, ASC / HAP-S can simultaneously remove F in the saturated absorption tail liquid. - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions, organic matter and other major pollutants to achieve tail liquid purification and recycling; the absorbent reduces the interfacial tension between the pollutants and the absorption liquid, inhibits the formation of liquid crystal phase, and acts as a detergent through acid-base neutralization reaction, oxidation-reduction reaction, chemical precipitation, diffusion-dissolution process and the principle of like dissolves like, while removing pollutants such as sulfur dioxide, fluoride, HCl, nitrogen oxides, heavy metals, VOCs, dioxins, and odorous substances in the flue gas.

[0040] In general, the present invention has the following advantages:

[0041] The multi-media collaborative pollution reduction and carbon reduction system for industrial furnace sludge treatment provided by the present invention fully utilizes the heat of industrial furnace flue gas to achieve graded drying, pyrolysis and activation of sludge. The generated pyrolysis gas / tar and gaseous products of the activation stage enter the furnace as fuel, partially or completely replacing coal / natural gas fuel. The preparation and activation of sludge charcoal both use the heat of furnace flue gas and oxidizing components such as O2, CO2, and H2O, without the need for additional heat and activation medium. The activated sludge charcoal is fully used to prepare economical and efficient multifunctional carbon-based adsorbent ASC / HAP-S, and is used to simultaneously remove multiple pollutants in flue gas and saturated absorption tail liquid. The removal rate of flue gas particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins, and odorous substances reaches more than 90%, meeting emission standard requirements and achieving solid-gas-water multi-media collaborative pollution reduction and carbon reduction. The industrial furnace sludge treatment method of the present invention is adopted to recycle the heat / material of the flue gas, render the sludge harmless, reduce the amount and make it a resource, and treat pollutants with waste. The treatment functions are closely linked and the structure is compact. It has the advantages of low energy consumption, low investment and operation costs, simple and easy-to-control process, stable and reliable operation, high purification efficiency, synergistic effect of pollution reduction and carbon reduction, etc. In addition to being used in industrial furnaces to treat municipal sludge, it can also be used in industrial furnaces to treat printing and dyeing sludge, papermaking sludge, agricultural and forestry waste, livestock and poultry manure and other industrial organic solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of a multi-media synergistic pollution reduction and carbon reduction system for treating sludge from industrial furnaces.

[0043] In the figure, 1 is an industrial furnace production unit, 1-1 is an air inlet pipe, 1-2 is an air outlet pipe, 1-3 is a combustion section, 1-4 is an adsorbent injection port, and 1-5 is a flow control valve; 2 is a sludge disposal unit, 2-1 is a sludge inlet, 2-2 is a carbonization chamber, 2-3 is a rotary grate, 2-4 is a fixed grate, 2-5 is a sludge charcoal outlet, 2-6 is a first flue gas inlet, 2-7 is a pyrolysis gas outlet, 2-8 is a conveyor belt, and 2-9 is an adsorbent preparation unit; 3 is a dust removal unit, 3-1 is the second flue gas inlet, 3-2 is the dust removal chamber, 3-3 is the flue gas outlet; 4 is a multi-pollutant coordinated control unit, 4-1 is the dust removal flue gas inlet, 4-2 is the filler, 4-3 is the spray device, 4-4 is the demisting section, 4-5 is the adsorption section, 4-6 is the dispensing unit, 4-7 is the absorption liquid circulation unit, 4-8 is the tail liquid treatment unit, 4-9 is the first adsorbent inlet, 4-10 is the second adsorbent inlet, 4-11 is the purified flue gas outlet; 5 is the exhaust pipe, and 5-1 is the induced draft fan. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to specific implementation methods.

[0045] Example 1

[0046] like Figure 1 As shown, this embodiment provides a multi-media collaborative pollution reduction and carbon reduction system for industrial furnace sludge disposal, comprising:

[0047] Industrial furnace production unit 1, the industrial furnace production unit 1 is used to produce flue gas as a heat source and oxidizing medium to enter the sludge disposal unit 2, and the remaining flue gas is transported to the dust removal unit 3;

[0048] The sludge disposal unit 2 is used to receive sludge, which flows from the top to the bottom of the sludge disposal unit 2. The heat source and oxidizing medium transmitted by the industrial furnace production unit 1 flow from the bottom to the top of the sludge disposal unit 2. The flue gas and the sludge flow in the opposite direction, so that the sludge undergoes a drying stage, a pyrolysis stage, and an activation stage in sequence during the flow process to obtain activated sludge carbon. The sludge disposal unit 2 has an adsorbent preparation unit 2-9, which uses the activated sludge carbon to prepare adsorbent.

[0049] The dust removal unit 3 is connected to the industrial furnace production unit 1 and can remove dust from the flue gas transported by the industrial furnace production unit 1;

[0050] The multi-pollutant coordinated control unit 4 includes a packing 4-2, a spray device 4-3, a demisting section 4-4, an adsorption section 4-5, an absorption liquid circulation unit 4-7, a dispensing unit 4-6, and a tail liquid treatment unit 4-8. The packing 4-2, the spray device 4-3, the demisting section 4-4, and the adsorption section 4-5 are arranged in sequence. The flue gas transported by the dust removal unit 3 flows to the packing 4-2, the spray device 4-3, the demisting section 4-4, and the adsorption section 4-5 in sequence.

[0051] The dispensing unit 4-6 and the tail liquid treatment unit 4-8 are both connected to the absorption liquid circulation unit 4-7. The dispensing unit 4-6 is used to produce absorbent and supply it to the absorption liquid circulation unit 4-7. The absorption liquid circulation unit 4-7 is used to supply the absorption liquid to the spraying device 4-3 for recycling. The spraying device 4-3 sprays the absorption liquid to remove particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins and odorous substances in the flue gas;

[0052] The tail liquid treatment unit 4-8 is used to receive the saturated absorption liquid sprayed by the spray device 4-3, and the adsorbent preparation unit 2-9 supplies the adsorbent to the tail liquid treatment unit 4-8 to adsorb the F of the absorption liquid. - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions and organic matter, and the liquid after adsorption by the adsorbent is transported to the absorption liquid circulation unit 4-7 for recycling;

[0053] Tail liquid treatment units 4-8 use granular ASC / HAP-S adsorbent as the treatment medium and are placed in a container. The adsorbent dosage is 100-2000 g / ton of water, the treatment temperature is 10-50°C, and the stirring speed is 60-300 rpm.

[0054] The adsorbent preparation unit 2-9 supplies adsorbent to the adsorption section 4-5, which adsorbs fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances in the flue gas;

[0055] The adsorbent preparation unit 2-9 supplies adsorbent to the industrial furnace production unit 1 to remove part of the fluoride, HCl, heavy metals and dioxins in situ;

[0056] The exhaust unit is used to discharge the flue gas after passing through the adsorption section 4-5.

[0057] The multi-pollutant coordinated control unit 4 is a tower structure, with the dust removal flue gas inlet 4-1 located at the lower side of the tower body. The absorption liquid circulation unit 4-7 is also located at the lower side of the tower body. The multi-pollutant coordinated control unit 4 is also provided with a purified flue gas outlet 4-11, which is located at the top of the tower body and corresponds to the adsorption section 4-5. The purified flue gas outlet 4-11 is connected to the exhaust unit. Specifically, the exhaust unit includes an exhaust pipe 5 and an induced draft fan 5-1. The purified flue gas outlet 4-11 is connected to the exhaust pipe 5, and the induced draft fan 5-1 is provided at the connection between the exhaust pipe 5 and the purified flue gas outlet 4-11.

[0058] By setting up the above system, the heat of the flue gas and the oxidizing medium of the industrial furnace production unit 1 are fully utilized. Through the countercurrent flow of flue gas and sludge, the sludge undergoes drying, pyrolysis and activation stages in sequence during the flow process, thereby achieving harmless, reduced and resource-based disposal of the sludge.

[0059] Sludge disposal unit 2 is equipped with a sludge inlet 2-1, a first flue gas inlet 2-6, a pyrolysis gas outlet 2-7, and a sludge charcoal outlet 2-5. Industrial furnace production unit 1 is equipped with an outlet pipe 1-2 and an inlet pipe 1-1. The first flue gas inlet 2-6 is connected to the outlet pipe 1-2; the pyrolysis gas outlet 2-7 is connected to the inlet pipe 1-1. Sludge enters sludge disposal unit 2 through sludge inlet 2-1. During pyrolysis, the sludge produces CO, CH4, and tar, which are transported from the pyrolysis gas outlet 2-7 to the industrial furnace production unit 1 as fuel. Flue gas generated by industrial furnace production unit 1 is transported from outlet pipe 1-2 to sludge disposal unit 2 and dust removal unit 3, respectively. Specifically, outlet pipe 1-2 is equipped with a flow control valve 1-5, which regulates the flue gas flow rate.

[0060] A carbonization chamber 2-2 is provided inside the sludge disposal unit 2, and the carbonization chamber 2-2 is respectively connected to the sludge inlet 2-1, the first flue gas inlet 2-6, the pyrolysis gas outlet 2-7 and the sludge charcoal outlet 2-5. A plurality of rotating grates 2-3 are provided in the center of the carbonization chamber 2-2 and are spaced apart from the bottom to the top of the sludge disposal unit 2. A plurality of fixed grates 2-4 are provided on the inner side wall of the sludge disposal unit 2 and are spaced apart from the bottom to the top of the sludge disposal unit 2. The areas of the fixed grates 2-4 and the rotating grates 2-3 are both smaller than the cross-sectional area inside the sludge disposal unit 2. The fixed grates 2-4 and the rotating grates 2-3 are alternately and staggeredly distributed, and the fixed grates 2-4 and the rotating grates 2-3 are both inclined. It should be noted that the sludge entering the sludge treatment unit 2 has a moisture content of 60-80%, a particle size of 1-20 mm, a flue gas temperature of 700-900°C, a residence time of sludge in the sludge treatment unit 2 of 1-10 hours, and a specific surface area of the generated activated sludge carbon of 60-600 m 2 / g. Specifically, the sludge disposal unit 2 is a tower structure, the flue gas inlet is arranged at the lower part of the tower side wall, the pyrolysis gas outlet 2-7 is arranged at the upper part of the tower side wall, a rotating shaft is arranged in the middle of the carbonization chamber 2-2, and there are three rotary grates 2-3, and the three rotary grates 2-3 are fixed on the rotating shaft at equal intervals. The connection position between the rotary grate 2-3 and the rotating shaft is higher than the position of the rotary grate 2-3 away from the rotating shaft, so that the sludge can slide along the rotary grate 2-3; there are three fixed grates 2-4, and the fixed grate 2-4 is an annular structure, one side of which is fixedly connected to the inner wall of the sludge disposal unit 2, and the other side is inclined downward. The rotary grate 2-3 and the fixed grate 2-4 are inclined downward at an angle of 5-30° to the horizontal plane, and the rotation speed of the rotary grate 2-3 is 10-300 revolutions per hour.

[0061] Adsorbent preparation unit 2-9 is connected to sludge charcoal outlet 2-5 to receive activated sludge charcoal. Industrial furnace production unit 1 is equipped with a combustion section 1-3 and an adsorbent injection port 1-4. Combustion section 1-3 burns fuel and is connected to air inlet 1-1 and air outlet 1-2, respectively. Adsorbent injection port 1-4 corresponds to combustion section 1-3. Adsorption section 4-5 is equipped with a first adsorbent inlet 4-9. Tail liquid treatment unit 4-8 is equipped with a second adsorbent inlet 4-10. Adsorbent preparation unit 2-9 is connected to adsorbent injection port 1-4, first adsorbent inlet 4-9, and second adsorbent inlet 4-10, respectively. Specifically, adsorbent preparation unit 2-9 is connected to sludge charcoal outlet 2-5 via a conveyor belt 2-8, which transports the sludge charcoal.

[0062] Specifically, the adsorbent is surface-treated hydroxyapatite loaded on activated sludge carbon, with a chemical formula of ASC / HAP-S, wherein the mass percentage of activated carbon is 60-90%. The preparation method of the adsorbent is as follows: preparing hydroxyapatite, surface-treating the hydroxyapatite, and loading the surface-treated hydroxyapatite onto the sludge carbon to obtain the adsorbent. The molecular formula of hydroxyapatite is Ca 10-z (HPO4) z (PO4) 6-z (OH) 2-z , where 0≤z≤1. The preparation of the hydroxyapatite can be carried out by chemical precipitation, hydrothermal synthesis, solid phase reaction or mechanochemical ball milling. The calcium salt precursor for preparing hydroxyapatite by chemical precipitation is Ca(NO3)2·4H2O, Ca(OH)2, CaHPO4·2H2O, CaO, CaCl2 or Ca(OC2H5)2, and the phosphate precursor is (NH4)2HPO4, H3PO4, NaH2PO4 or (CH3O)3PO. The surface treatment uses a compound of citric acid and sodium dodecylbenzenesulfonate, and the mass ratio of citric acid and sodium dodecylbenzenesulfonate is 1-5:5-12. The surface of hydroxyapatite is modified by the compound. The surface-modified hydroxyapatite is loaded onto the sludge carbon by an impregnation method or a mechanical ball milling method to obtain a granular ASC / HAP-S adsorbent; or the sludge carbon is first prepared into a honeycomb, columnar or plate-shaped sludge carbon, and then the surface-modified hydroxyapatite is loaded onto the sludge carbon by an impregnation method to obtain a monolithic ASC / HAP-S adsorbent.

[0063] The adsorption section 4-5 uses monolithic or granular ASC / HAP-S adsorbent. The residence time of flue gas in the adsorption section 4-5 is 0.5-10 s, and the adsorption reaction temperature is 30-60°C.

[0064] The multi-pollutant collaborative control unit 4 is provided with a dust removal fume inlet 4-1, which corresponds to the filler 4-2. The dust removal fume inlet 4-1 is located at the lower part of the side wall of the multi-pollutant collaborative control unit 4 (tower body), and is connected to the dust removal unit 3. The filler 4-2 is a ceramic filler 4-2 or a stainless steel filler 4-2.

[0065] The spray device 4-3 includes a horizontally arranged spray pipe and a nozzle arranged on the spray pipe, and the spray pipe is connected to the absorption liquid circulation unit 4-7;

[0066] The demisting section 4-4 includes a demister and an adsorption material. The demister is a corrugated plate type and is made of polymer material or stainless steel. The adsorption material is arranged on the surface of the demister and the adsorption material is activated sludge carbon.

[0067] The dust removal unit 3 is a tower or box structure, which has a dust removal chamber 3-2. The second flue gas inlet 3-1 and the flue gas outlet 3-3 are both connected to the dust removal chamber 3-2. Electrostatic dust removal or cyclone dust removal is used in the dust removal chamber 3-2 to remove dust from the flue gas flowing through the dust removal unit 3. The dust removal unit 3 is provided with a symmetrically distributed second flue gas inlet 3-1 and a flue gas outlet 3-3 on the side wall. The second flue gas inlet 3-1 is connected to the outlet pipe 1-2, and the flue gas outlet 3-3 is connected to the dust removal flue gas inlet 4-1.

[0068] The absorbent consists of the following components in percentage by mass: 0.3-8% of alkali, 0.2-6% of oxidant, 0.01-2% of active additive, 0.01-1% of auxiliary agent, 0.01-1% of electrolyte and the balance of water.

[0069] The base is any one of calcium hydroxide, sodium hydroxide, and sodium carbonate; the oxidant is any one of sodium persulfate, potassium permanganate, and hydrogen peroxide; the active additive is one or more of potassium hexadecanoate, sodium dodecylbenzenesulfonate, and the active ingredients in CN 114210174 A; the auxiliary agent is one or more of sodium toluenesulfonate, sodium xylenesulfonate, sodium isopropylbenzenesulfonate, sodium p-methylisopropylbenzenesulfonate, 1-hydroxy-2-naphthoate, 2-hydroxy-1-naphthalenesulfonate, and sodium 2-ethylhexyl sulfate; and the electrolyte is any one of calcium sulfate, potassium sulfate, and sodium acetate.

[0070] Absorption liquid circulation unit 4-7: mainly includes a circulating water pump, which is used to transport the absorption liquid from the absorption liquid circulation unit to the spraying device 4-3.

[0071] Dispensing unit 4-6: The structure is the same as the absorbent preparation and storage system in invention patent CN111375300A, and is used for preparing absorbent.

[0072] Example 2

[0073] This embodiment provides a multi-media collaborative pollution reduction and carbon reduction process for treating sludge in industrial furnaces, which uses a multi-media collaborative pollution reduction and carbon reduction system for treating sludge in industrial furnaces, including the following steps:

[0074] The flue gas generated by the industrial furnace production unit is used as a heat source and oxidizing medium to enter the sludge disposal unit;

[0075] The sludge disposal unit dries, pyrolyzes and activates the sludge through flue gas to obtain combustible gas, tar and activated sludge charcoal;

[0076] The combustible gas and tar are introduced back into the industrial furnace as fuel, while the activated sludge carbon is sent to the adsorbent preparation unit;

[0077] The adsorbent preparation unit uses activated sludge carbon as a carrier and loads surface-treated hydroxyapatite on the sludge carbon to prepare the adsorbent;

[0078] The adsorbent is sprayed into the industrial furnace production unit or directly mixed into the product of the industrial furnace production unit. The adsorbent is also transported to the adsorption section of the multi-pollutant coordinated control unit and the tail liquid purification unit. The adsorbent removes some fluoride, HCl, heavy metals and dioxins in situ within the industrial furnace production unit;

[0079] The flue gas pollutants generated by industrial furnaces are transported to the multi-pollutant coordinated control unit, where dust is removed first. Then, a wet absorption section is formed through fillers, spray devices, dispensing units, absorption liquid circulation units and tail liquid treatment units. The liquid-gas ratio of the wet absorption section is 1-200L / m 3 , the absorption reaction temperature is 30-80℃; wet absorption is carried out through the wet absorption section, specifically: using a spray device to spray absorbent to remove particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances in the flue gas, and then removing water vapor in the flue gas through the demisting section, and then entering the adsorption section, using the adsorbent in the adsorption section to further remove fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances;

[0080] The saturated absorption tail liquid produced by wet absorption enters the tail liquid treatment unit, where the F in the saturated absorption tail liquid is removed under the action of the adsorbent. - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions and organic matter, and the purified absorption liquid re-enters the absorption liquid circulation unit for recycling.

[0081] The parts not mentioned in this embodiment are the same as those in the first embodiment.

[0082] Specific application example 1

[0083] A brick kiln treated sludge with a moisture content of 80%. After 4 hours of treatment, the sludge obtained a specific surface area of 238 m 2 / g activated sludge carbon, and the activated sludge carbon was used to prepare granular ASC / HAP-S adsorbent (using Ca(NO3)2·4H2O and (NH4)2HPO4 as precursors, and the hydroxyapatite was prepared by the chemical precipitation method described in "Effects of the Micromorphology of Nanohydroxyapatite on the Performance and Stability of the Superhydrophobic Layer on the Wood Surface" (https: / / doi.org / 10.13801 / j.cnki.fhclxb.20240722.001), and the surface of the hydroxyapatite was modified by a mixture of citric acid and sodium dodecylbenzene sulfonate in a mass ratio of 2:5, and the surface-modified hydroxyapatite was loaded on the activated sludge carbon by mechanical ball milling) and a monolithic ASC / HAP-S adsorbent (the activated sludge carbon was made into a column, and the surface-modified hydroxyapatite was loaded on the sludge carbon by impregnation). The initial concentration of industrial furnace flue gas pollutants was 488 mg / m 3 , sulfur dioxide 290mg / m 3 , nitrogen oxides 390mg / m 3 , fluoride 10mg / m 3 HCl 48mg / m 3 , heavy metals 1.2mg / m 3 、VOCs8.2 mg / m 3 、Dioxin 0.16ng TEQ / m 3 The odor concentration was 4168 (dimensionless), which was treated in sequence by adsorption using the granular ASC / HAP-S adsorbent in the furnace (the adsorbent was mixed into the bricks as one of the raw materials), electrostatic dust removal, absorption using a multi-effect absorbent containing 5% sodium hydroxide, 2% sodium persulfate, 0.05% sodium dodecylbenzenesulfonate, 0.05% sodium toluenesulfonate, 0.05% calcium sulfate, and 92.85% water, and adsorption using the honeycomb ASC / HAP-S adsorbent. The liquid-to-gas ratio in the absorption section was 80 L / m 3 The absorption reaction temperature is 60°C, the amount of ASC / HAP-S adsorbent used in tail liquid treatment is 200 g / ton of water, the treatment temperature is 40°C, the stirring rate is 60 rpm, the residence time of the adsorption section is 5 s, the adsorption reaction temperature is 40°C, and the emission concentration of the flue gas after purification is 25 mg / m 3 , sulfur dioxide 12mg / m 3 , nitrogen oxides 28mg / m 3 , fluoride 0.5mg / m 3 HCl 1mg / m 3 , heavy metals 0.1mg / m 3 、VOCs0.8 mg / m 3 、Dioxin 0.01ng TEQ / m 3 , odor concentration 309 (dimensionless), and the removal rate of each pollutant is more than 90%.

[0084] Specific application example 2

[0085] A brick kiln treated sludge with a moisture content of 80%. After 6 hours of treatment, the sludge obtained a specific surface area of 398 m 2 / g activated sludge carbon, and the activated sludge carbon was used to prepare granular ASC / HAP-S adsorbent (using Ca(NO3)2·4H2O and (NH4)2HPO4 as precursors, and the hydroxyapatite was prepared by the chemical precipitation method described in "Effects of the Micromorphology of Nanohydroxyapatite on the Performance and Stability of the Superhydrophobic Layer on the Wood Surface" (https: / / doi.org / 10.13801 / j.cnki.fhclxb.20240722.001), and the surface of the hydroxyapatite was modified by a mixture of citric acid and sodium dodecylbenzene sulfonate in a mass ratio of 3:5, and the surface-modified hydroxyapatite was loaded on the activated sludge carbon by mechanical ball milling) and a monolithic ASC / HAP-S adsorbent (the activated sludge carbon was made into a column, and the surface-modified hydroxyapatite was loaded on the sludge carbon by impregnation). The initial concentration of industrial furnace flue gas pollutants was 379 mg / m 3 , sulfur dioxide 170mg / m 3 , nitrogen oxides 321mg / m 3 , fluoride 8mg / m 3 HCl 32mg / m 3 , heavy metals 0.8mg / m 3 、VOCs7.9 mg / m 3 、Dioxin 0.12ng TEQ / m 3 The odor concentration was 5495 (dimensionless), which was treated in sequence by adsorption using the granular ASC / HAP-S adsorbent in the furnace (the adsorbent was mixed into the bricks as one of the raw materials), electrostatic dust removal, absorption using a multi-effect absorbent of "6% sodium hydroxide, 3% hydrogen peroxide, 0.05% sodium dodecylbenzenesulfonate, 0.05% sodium xylenesulfonate, 0.05% sodium acetate and 90.85% water" in the absorption section, and adsorption using the honeycomb ASC / HAP-S adsorbent. The liquid-gas ratio in the absorption section was 80 L / m 3 The absorption reaction temperature is 60°C, the amount of ASC / HAP-S adsorbent used in tail liquid treatment is 200 g / ton of water, the treatment temperature is 40°C, the stirring rate is 60 rpm, the residence time of the adsorption section is 5 s, the adsorption reaction temperature is 40°C, and the emission concentration of the flue gas after purification is 17 mg / m 3 , sulfur dioxide 10mg / m 3 、Nitrogen oxides 30mg / m 3 、Fluoride 0mg / m 3 HCl 0mg / m3 , heavy metals 0.05mg / m 3 、VOCs0.5 mg / m 3 、Dioxin 0.01ng TEQ / m 3 , odor concentration 309 (dimensionless), and the removal rate of each pollutant is more than 90%.

[0086] Specific application example 3

[0087] A brick kiln treated sludge with a moisture content of 80%. After 8 hours of treatment, the sludge obtained a specific surface area of 366 m 2 / g activated sludge carbon, and the activated sludge carbon was used to prepare granular ASC / HAP-S adsorbent (using Ca(NO3)2·4H2O and (NH4)2HPO4 as precursors, and the hydroxyapatite was prepared by the chemical precipitation method described in "Effects of the Micromorphology of Nanohydroxyapatite on the Performance and Stability of the Superhydrophobic Layer on the Wood Surface" (https: / / doi.org / 10.13801 / j.cnki.fhclxb.20240722.001), and the surface of the hydroxyapatite was modified by a mixture of citric acid and sodium dodecylbenzene sulfonate in a mass ratio of 3:5, and the surface-modified hydroxyapatite was loaded on the activated sludge carbon by mechanical ball milling) and a monolithic ASC / HAP-S adsorbent (the activated sludge carbon was made into a column, and the surface-modified hydroxyapatite was loaded on the sludge carbon by impregnation). The initial concentration of particulate matter in the flue gas of the industrial furnace was 358mg / m 3 , sulfur dioxide 206mg / m 3 , nitrogen oxides 291mg / m 3 , fluoride 8mg / m 3 HCl 39mg / m 3 、Heavy metals 1mg / m 3 、VOCs10.3mg / m 3 、Dioxin 0.22ng TEQ / m 3 The odor concentration was 5495 (dimensionless), which was treated in sequence by adsorption using the granular ASC / HAP-S adsorbent in the furnace (the adsorbent was mixed into the bricks as one of the raw materials), electrostatic dust removal, absorption using a multi-effect absorbent in the absorption section consisting of "4% calcium hydroxide + 4% sodium hydroxide, 3% hydrogen peroxide, 0.05% potassium hexadecanoate, 0.05% sodium xylene sulfonate, 0.05% sodium acetate and 88.85% water", and adsorption using the honeycomb ASC / HAP-S adsorbent. The liquid-gas ratio in the absorption section was 50 L / m 3The absorption reaction temperature is 60°C, the amount of ASC / HAP-S adsorbent used in tail liquid treatment is 200 g / ton of water, the treatment temperature is 40°C, the stirring rate is 100 rpm, the residence time of the adsorption section is 7 s, the adsorption reaction temperature is 40°C, and the emission concentration of the flue gas after purification is 15 mg / m 3 , sulfur dioxide 10mg / m 3 、Nitrogen oxides 25mg / m 3 、Fluoride 0mg / m 3 HCl 0mg / m 3 , heavy metals 0.08mg / m 3 、VOCs0.8 mg / m 3 、Dioxin 0.02ng TEQ / m 3 , odor concentration 417 (dimensionless), and the removal rate of each pollutant is more than 90%.

[0088] Comparative Example 1

[0089] A brick kiln treated sludge with a moisture content of 80%. After 6 hours of treatment, the sludge obtained a specific surface area of 398 m 2 / g activated sludge charcoal. The initial concentration of industrial furnace flue gas pollutants is 392mg / m 3 , sulfur dioxide 234mg / m 3 , nitrogen oxides 198mg / m 3 , fluoride 8mg / m 3 HCl 28mg / m 3 , heavy metals 1.3mg / m 3 、VOCs6.3 mg / m 3 、Dioxin 0.09ng TEQ / m 3 The odor concentration is 4168 (dimensionless), which is treated by electrostatic dust removal and absorption with an absorbent of "6% sodium hydroxide, 6% calcium hydroxide and 88% water" in the absorption section. The liquid-gas ratio in the absorption section is 80L / m 3 The absorption reaction temperature is 60℃, and the emission concentration of the flue gas after purification is 28mg / m 3 , sulfur dioxide 20mg / m 3 , nitrogen oxides 172mg / m 3 、Fluoride 0mg / m 3 、HCl 0mg / m 3 , heavy metals 0.1mg / m 3 、VOCs5.8 mg / m 3 、Dioxin 0.08ng TEQ / m 3, odor concentration 2344 (dimensionless), among which the removal rate of pollutants such as nitrogen oxides, VOCs, dioxins, and odor is less than 50%.

[0090] The tail liquid in the above embodiment refers to the liquid after the absorption liquid is sprayed by the spraying device to absorb pollutants in the flue gas, that is, the saturated absorption tail liquid; and the saturated absorption tail liquid is formed after the pollutants are adsorbed by the adsorbent to form an absorption liquid that is transmitted to the absorption liquid circulation unit for recycling.

[0091] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A multi-media collaborative pollution reduction and carbon reduction system for industrial furnace sludge disposal, characterized by: include: Industrial furnace production unit: the flue gas from the industrial furnace production unit is used as a heat source and oxidizing medium to enter the sludge disposal unit, and the remaining flue gas is transported to the dust removal unit; The sludge disposal unit is used to receive sludge, which flows from the top to the bottom of the sludge disposal unit. The heat source and oxidizing medium transmitted by the industrial furnace production unit flow from the bottom to the top of the sludge disposal unit. The flue gas and the sludge flow in the opposite direction, so that the sludge undergoes a drying stage, a pyrolysis stage and an activation stage in sequence during the flow process to obtain activated sludge carbon. The sludge disposal unit has an adsorbent preparation unit, which uses the activated sludge carbon to prepare adsorbent. The dust removal unit is connected to the industrial furnace production unit and can remove dust from the flue gas transported by the industrial furnace production unit; The multi-pollutant collaborative control unit includes a filler, a spray device, a demisting section, an adsorption section, an absorption liquid circulation unit, a dispensing unit, and a tail liquid treatment unit. The filler, spray device, demisting section, and adsorption section are arranged in sequence. The flue gas transported by the dust removal unit flows to the filler, spray device, demisting section, and adsorption section in sequence. The dispensing unit and the tail liquid treatment unit are both connected to the absorption liquid circulation unit. The dispensing unit is used to manufacture absorbent and supply it to the absorption liquid circulation unit. The absorption liquid circulation unit is used to supply the absorption liquid to the spraying device for recycling. The spraying device sprays the absorption liquid to remove particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins and odorous substances in the flue gas; The tail liquid treatment unit is used to receive the saturated absorption tail liquid sprayed by the spray device, and the adsorbent preparation unit supplies adsorbent to the tail liquid treatment unit to adsorb the F - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions and organic matter, and the absorption liquid after adsorption by the adsorbent is transported to the absorption liquid circulation unit for recycling; The adsorbent preparation unit supplies adsorbent to the adsorption section, which adsorbs fluoride, HCl, heavy metals, VOCs, dioxins and odorous substances in the flue gas; The adsorbent preparation unit supplies adsorbent to the industrial furnace production unit to remove some fluorides, HCl, heavy metals and dioxins in situ; The exhaust unit is used to discharge the flue gas after passing through the adsorption section.

2. The multi-media synergistic pollution and carbon reduction system for industrial furnace sludge treatment according to claim 1 is characterized by: The sludge disposal unit is provided with a sludge inlet, a first flue gas inlet, a pyrolysis gas outlet and a sludge charcoal outlet. The industrial furnace production unit is provided with an outlet pipe and an inlet pipe. The first flue gas inlet is connected to the outlet pipe; the pyrolysis gas outlet is connected to the inlet pipe; the sludge enters the sludge disposal unit from the sludge inlet, and the sludge produces CO, CH4 and tar when undergoing pyrolysis. The CO, CH4 and tar are transported from the pyrolysis gas outlet to the industrial furnace production unit as fuel; the flue gas generated by the industrial furnace production unit is transported from the outlet pipe to the sludge disposal unit and the dust removal unit respectively.

3. The multi-media synergistic pollution and carbon reduction system for industrial furnace sludge treatment according to claim 1 is characterized by: A carbonization chamber is provided inside the sludge disposal unit, which is respectively connected to the sludge inlet, the first flue gas inlet, the pyrolysis gas outlet and the sludge charcoal outlet. A plurality of rotating grates are provided in the center of the carbonization chamber and are spaced apart from the bottom to the top of the sludge disposal unit. A plurality of fixed grates are provided on the inner wall of the sludge disposal unit and are spaced apart from the bottom to the top of the sludge disposal unit. The areas of the fixed grates and the rotating grates are both smaller than the cross-sectional area inside the sludge disposal unit. The fixed grates and the rotating grates are alternately and staggeredly distributed, and the fixed grates and the rotating grates are both inclined.

4. The multi-media collaborative pollution reduction and carbon reduction system for industrial furnace sludge treatment according to claim 2 is characterized by: The adsorbent preparation unit is connected to the sludge charcoal outlet to receive activated sludge charcoal; the industrial furnace production unit is provided with a combustion section and an adsorbent injection port, the combustion section is respectively connected to the air inlet pipe and the air outlet pipe, the adsorbent injection port corresponds to the combustion section, the adsorption section is provided with a first adsorbent inlet, the tail liquid treatment unit is provided with a second adsorbent inlet, and the adsorbent preparation unit is respectively connected to the adsorbent injection port, the first adsorbent inlet and the second adsorbent inlet.

5. The multi-media collaborative pollution reduction and carbon reduction system for industrial furnace sludge disposal according to claim 4 is characterized in that: The preparation method of the adsorbent comprises: preparing hydroxyapatite, surface-treating the hydroxyapatite, and loading the surface-treated hydroxyapatite on activated sludge carbon to obtain the adsorbent; The preparation method of hydroxyapatite is: chemical precipitation method, hydrothermal synthesis method, solid phase reaction method or mechanochemical ball milling method; The method for treating the surface of hydroxyapatite is as follows: using a compound substance of citric acid and sodium dodecylbenzene sulfonate, wherein the mass ratio of citric acid to sodium dodecylbenzene sulfonate is 1-5:5-12, and modifying the surface of hydroxyapatite by the compound substance; Among them, the method of loading the surface-treated hydroxyapatite on the activated sludge carbon is: using the impregnation method or mechanical ball milling method to load the surface-modified hydroxyapatite on the activated sludge carbon to obtain a granular adsorbent; or preparing the activated sludge carbon into honeycomb, columnar or plate-shaped activated sludge carbon, and then loading the surface-modified hydroxyapatite on the activated sludge carbon by the impregnation method to obtain the adsorbent.

6. The multi-media synergistic pollution and carbon reduction system for industrial furnace sludge treatment according to claim 1 is characterized by: The filler is provided with a dust removal fume inlet, which is connected to the dust removal unit, and the filler is a ceramic filler or a stainless steel filler; The spraying device includes a horizontally arranged spraying pipe and a spray head arranged on the spraying pipe, and the spraying pipe is connected to the absorption liquid circulation unit; The demisting section includes a demister and adsorption material. The demister is a corrugated plate type. The adsorption material is arranged on the surface of the demister. The adsorption material is activated sludge carbon. The adsorption section uses adsorbent, the residence time of flue gas in the adsorption section is 0.5-10 s, and the adsorption reaction temperature is 30-60℃.

7. The multi-media synergistic pollution and carbon reduction system for industrial furnace sludge treatment according to claim 6 is characterized by: The dust removal unit is a tower or box structure, and adopts electrostatic dust removal or cyclone dust removal to remove dust from the flue gas flowing through the dust removal unit. The dust removal unit is provided with a symmetrically distributed second flue gas inlet and flue gas outlet on the side wall. The second flue gas inlet is connected to the outlet pipe, and the flue gas outlet is connected to the dust removal flue gas inlet.

8. A multi-media synergistic pollution reduction and carbon reduction process for industrial furnace sludge disposal, characterized by: The multi-media synergistic pollution reduction and carbon reduction system for treating sludge from industrial furnaces according to any one of claims 1 to 7 comprises the following steps: The flue gas from the industrial furnace production unit is used as a heat source and oxidizing medium to enter the sludge disposal unit; The sludge disposal unit dries, pyrolyzes and activates the sludge through flue gas to obtain combustible gas, tar and activated sludge charcoal; The combustible gas and tar are introduced back into the industrial furnace as fuel, while the activated sludge carbon is sent to the adsorbent preparation unit; The adsorbent preparation unit uses activated sludge carbon as a carrier and loads surface-treated hydroxyapatite on the sludge carbon to prepare the adsorbent; The adsorbent is sprayed into the industrial furnace production unit or directly mixed into the product of the industrial furnace production unit. The adsorbent is also transported to the adsorption section of the multi-pollutant coordinated control unit and the tail liquid purification unit. The adsorbent removes some fluoride, HCl, heavy metals and dioxins in situ within the industrial furnace production unit; The flue gas pollutants generated by the industrial furnace are transported to the multi-pollutant coordinated control unit for dust removal. The wet absorption section is composed of a filler, a spraying device, a dispensing unit, an absorption liquid circulation unit and a tail liquid treatment unit. The wet absorption section is used for wet absorption. Specifically, the absorbent is sprayed by the spraying device to remove particulate matter, sulfur dioxide, nitrogen oxides, fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances in the flue gas. The water vapor in the flue gas is removed by the demisting section. The flue gas then enters the adsorption section, and the adsorbent in the adsorption section is used to further remove fluoride, HCl, heavy metals, VOCs, dioxins and malodorous substances. The saturated absorption tail liquid produced by wet absorption enters the tail liquid treatment unit, where the F in the saturated absorption tail liquid is removed under the action of the adsorbent. - 、Cl - 、SO4 2- 、NO3 - , heavy metal ions and organic matter, and the purified absorption liquid re-enters the absorption liquid circulation unit for recycling.

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