46 results about "Cement manufacturing" patented technology

The invention discloses a cement manufacturing equipment knowledge graph construction method and system based on a large language model, relates to the technical field of artificial intelligence, and solves the problems that the prior art is lack of dynamic knowledge updating capability, cannot integrate new knowledge generated by equipment transformation and process optimization in time, and improves the construction efficiency. And the accuracy of the knowledge graph of the cement manufacturing equipment is relatively low. A field data set is generated based on historical multi-source heterogeneous data; generating a tuple generation model and a cement manufacturing equipment knowledge graph based on the field data set; dynamically updating and complementing the knowledge graph of the cement manufacturing equipment based on the multi-source heterogeneous data to obtain a newest knowledge graph of the cement manufacturing equipment; according to the method, the updating and complementing evaluation result is generated based on the newest cement manufacturing equipment knowledge graph, and the existing cement manufacturing equipment knowledge graph is dynamically updated and complemented after new knowledge is obtained each time, so that the accuracy and timeliness of the knowledge graph are improved, and the completeness and decision support capability of the knowledge graph are improved at the same time.

The present disclosure provides a method and apparatus for predicting direct carbon emissions in cement production. It relates to the field of control technology for cement production and is primarily aimed at solving the problem that existing methods for predicting direct carbon emissions cannot effectively intervene in manufacturing processes to ensure that direct carbon emissions comply with the standard. The main technical solutions of the present disclosure include: obtaining a set of target parameters in a current target manufacturing element; inputting an actual parameter value corresponding to each of the target parameters in the set of target parameters into a direct carbon emission prediction model to obtain a predicted value for direct carbon emissions; and estimating...whether the predicted value for direct carbon emissions exceeds a standard value for direct carbon emissions, and determining a parameter value according to each of the target parameters in a subsequent target manufacturing step according to a predefined setting rule when the predicted value for direct carbon emissions exceeds the standard value for direct carbon emissions, so that a direct carbon emissions value output in an entire cement manufacturing process is controlled to correspond to a standard value for direct carbon emissions. The present disclosure is used for predicting direct carbon emissions in cement manufacturing.

The application relates to the technical field of cement manufacturing, and discloses a grinding system which comprises a roller pressing system, a vertical mill system and a ball mill system, the discharge port of the roller pressing system and the discharge port of the vertical mill system are both connected to the feed port of the ball mill system; the roller pressing system is used for grinding first material, and the vertical mill system is used for grinding second material; the ball mill system is used for receiving the ground first material and the ground second material, and mixing the ground first material and the ground second material to obtain required third material; wherein the roller pressing system is further used for distributing a part of the ground first material to the ball mill system and returning another part of the ground first material to the roller pressing system for regrinding; and / or the vertical mill system is further used for distributing a part of the ground second material to the ball mill system and returning another part of the ground second material to the vertical mill system for regrinding, so that the appearance grading of the third material can be improved, and the energy consumption of the grinding system can be reduced.

A combustion method using a fuel combustion device, a cement manufacturing method, and a cement calcination facility including a fuel combustion device, in which while the amount of a fossil fuel used as a fuel supplied to a fuel combustion device provided in various facilities such as a cement calcination facility is reduced, the radiation heat transfer amounts of various burners are maintained, whereby the amount of heat transferred to a heating target such as a powder raw material of cement clinker is maintained to maintain a state suitable for calcination, the amount of carbon dioxide emitted from the various facilities is reduced, and the various facilities can be operated at a low cost, and a fuel combustion device including a fuel supply mechanism having a mechanism that supplies a flammable powder, a mechanism that supplies a fuel gas, and a mechanism that supplies a non-flammable powder are used.

The present invention concerns an industrial chemical process (400f) and an apparatus for carrying out that process. The chemical process integrates into a single, combined method: (i) a method (303, 304) of producing iron and / or manganese from their ores, and (ii) a method (205a, 205b, 207, 208, 209) of producing an oxide or hydroxide of at least one of calcium, magnesium and iron from another ore respectively comprising a carbonate mineral of at least one of calcium, magnesium and iron. This combined method has the iron and / or manganese ore and the other ore comprising the carbonate mineral as its only essential ingredients, with common salt and / or water as optional extra ingredients. The combined method produces iron and / or manganese in elemental form, an oxide or hydroxide derived from the carbonate mineral, and oxygen as its corresponding products. If the iron and / or manganese ore also comprises a siliceous mineral, the method may also produce an alkaline mixture comprising sodium silicate as a co-product. Salt and water act as intermediaries to produce these end-products, but are only consumed if supplied in excess. An amount of sodium oxide, hydroxide and / or carbonate determined by the amount of salt consumed may be produced as a co-product, along with a corresponding amount of at least one of chlorine and hydrochloric acid. An amount of hydrogen determined by the amount of water consumed may also be produced as a co-product, along with an increased amount of oxygen. The iron, manganese and oxygen produced may all be used in steelmaking. Any excess oxygen may be safely vented to atmosphere. The oxide or hydroxide derived from the carbonate mineral may be used in cement manufacture, as a flux in steelmaking and / or as an ingredient in the manufacture of soda-lime glass. The alkaline mixture comprising sodium silicate may be used as an alkaline activator for an alkaline activated or geopolymer cement. The sodium carbonate may be used in the manufacture of soda-lime and / or borosilicate glass, for example. The chlorine and / or hydrochloric acid may be used in the manufacture of chlorinated organic compounds, for example. The hydrogen may be used as a fuel in a hydrogen economy. The method of the invention requires no nett input of heat because the chemical reactions it involves are exothermic overall. It also consumes no fossil fuels and has electricity as its only energy requirement. Thus if the electricity is produced from a source of renewable energy, this method produces no greenhouse gas emissions. In some embodiments, the method can even have a negative carbon footprint overall. The invention is intended to replace existing techniques for producing iron and / or manganese from their ores, including hydrogen-DRI, the calcination of limestone and other carbonate minerals, both in cement manufacture and in the production of lime for other purposes, and the ammonia-soda, or Solvay, process for the production of sodium carbonate. The invention therefore has the potential to eliminate up to about 20% of anthropogenic carbon dioxide emissions. [Fig. 9B]

The disclosure relates to the technical field of cement manufacturing, and specifically relates to a calcination system and method for low-carbon cement clinker. The calcination system includes: a kaolin calcination assembly including a preheater and a decomposition furnace, where the preheater is provided with a multi-stage cyclone cylinder; the preheater is provided with a feed port and a discharge port; the decomposition furnace is provided with a fuel adding port and a raw material inlet; the raw material inlet is connected to the discharge port; activated kaolin is generated by the decomposition furnace through calcination; and the decomposition furnace has a calcination temperature of 700° C. to 850° C. and calcination time of 0 h to 1.5 h, and a calcination atmosphere in the decomposition furnace is an oxygen-enriched atmosphere or a CO reducing atmosphere; and a cement calcination assembly configured to generate cement clinker through calcination, where the activated kaolin is added to a discharge side of the cement calcination assembly according to a predetermined ratio of the activated kaolin to the cement clinker. Use of carbon-containing raw materials in clinker production and carbon emissions of clinker are reduced, and a hydration rate of the cement clinker is adjusted.

To provide a use device of a liquefied combustible gas capable of easily and inexpensively gasifying a liquefied combustible gas especially in a cement production facility.SOLUTION: There is provided, a use device of a liquefied combustible gas, the use device can be attached to a cement production facility comprising: a calcination furnace; a cement kiln; and a clinker cooler which is coupled to a part in front of a furnace of the cement kiln. The use device comprises: a tank storing the liquefied combustible gas in a liquid state; and a combustible gas pipeline which communicates the clinker cooler with a blowing part which is provided on at least one part belonging to a group formed of a calcination furnace extraction pipeline through which an extraction gas extracted from the clinker cooler is distributed to the calcination furnace. The combustible gas pipeline supplies the liquefied combustible gas or, the combustible gas obtained by being gasified during circulation of the liquefied combustible gas to the blowing part.SELECTED DRAWING: Figure 3

The application discloses a cement cooling device. The cement cooling device comprises a shell, a crushing part capable of crushing materials into fine fragments, a cold air part connected with the shell below the crushing part, and a scattering part arranged below the crushing part. The materials enter the crushing part through a feeding port, and the fine fragments of the materials fall directly into the space below the crushing part due to gravity after being crushed by the crushing part. The fine fragments of the materials are scattered by the scattering part and contacted with the cold air blown by the cold air part, so that the fine fragments of the materials generate turbulent flow in the shell, the contact time of the materials and the cold air is prolonged, and the temperature of the materials is reduced. Meanwhile, the particle size of the materials is reduced and the contact area of the materials and the cold air is increased due to the crushing and scattering of the materials, which is beneficial to the cooling of the materials, guarantees the final cooling temperature of the materials, and improves the quality of the cooled materials. In addition, the application further discloses a cement manufacturing system, a cement cooling method and a manufacturing method.

The present invention relates to a cement production apparatus (10) comprising: - a preheater (12) for preheating raw meal; - a calcining furnace (14) for calcining the preheated raw meal; - a furnace (16) having a furnace burner (28) for calcining the raw meal to form cement clinker, wherein the furnace (16) has a combustion gas inlet for introducing combustion gas with an oxygen content of 30% to 75% into the furnace (16); and - a cooler (18) for cooling the cement clinker; wherein the calcining furnace (14) and the furnace (16) each have at least one fuel inlet (20) for introducing at least one fuel into the calcining furnace (14) and the furnace (16), wherein the calcining furnace (14) and the furnace (16) each have at least one inert gas inlet (64, 68) for introducing inert gas into the calcining furnace (14) and the furnace (16), respectively.

The utility model provides an efficient wear-resistant lining plate for a ball mill of a cement plant, which relates to the technical field of cement manufacturing and comprises a roller mechanism, the roller mechanism comprises an outer cylinder, a sealing plate is arranged in the outer cylinder, and an inlet pipe is arranged on the sealing plate. The butt joint frame between the inner cylinder and the outer cylinder is ensured to be fixed in place, and stable connection between the inner cylinder and the outer cylinder is ensured. The damping buffer is installed in the interlayer between the inner cylinder and the outer cylinder, and it is ensured that the two ends of the damping buffer are fixed between the inner cylinder and the outer cylinder respectively, so that effective buffering and damping are provided, preliminary testing is conducted, and it is ensured that all components are tightly connected and run smoothly. Starting the ball mill, observing the rotation condition of the roller mechanism, ensuring that the damping buffer between the inner cylinder and the outer cylinder works normally, and reducing abrasion and vibration, so that the efficient wear-resistant lining plate of the ball mill in the cement plant can reach the expected wear-resistant effect and performance standard in the using process through the implementation process; and the service life of the ball mill is prolonged.

Provided are a method and equipment for utilizing exhaust gas by which exhaust gas from a cement manufacturing plant can be efficiently utilized.　This method for utilizing cement exhaust gas comprises a step (step a) of adding nitric acid to CaCO3 to allow reaction and produce carbon dioxide and Ca(NO3)2 aqueous solution, and recovering the carbon dioxide; a step (step b) of heating and dehydrating the Ca(NO3)2 aqueous solution by utilizing the heat of the cement exhaust gas, producing CaO and NOx and discharging the NOx outside the system; a step (step c) of adding H2O to CaO to allow reaction and prepare Ca(OH)2; a step (step d) of bringing Ca(OH)2 into contact with the cement exhaust gas to allow reaction of carbon dioxide in the exhaust gas with Ca(OH)2 to prepare CaCO3 and recycling the CaCO3 as CaCO3 in the step a; and a step (step e) of bringing NOx produced in the step b into contact with water to prepare nitric acid and recycling the nitric acid as nitric acid in the (step a).

The present disclosure includes a method of capturing CO2 gas from a cement manufacturing plant and purifying the CO2 gas to provide recycled CO2 gas, pelletizing recycled polymeric material, converting the captured CO2 gas to supercritical CO2 gas, contacting the supercritical CO2 gas with the recycled polymeric material in an extruder to provide a CO2-laden polymeric material; plasticizing and extruding the CO2-laden polymeric material; forming pellets of the plasticized and extruded CO2-laden polymeric material; and injecting the pellets into a mold to form a plastic article of manufacture.

The present disclosure teaches a method and system of optimizing fuel consumption in a cement manufacturing kiln. The method comprises determining one or more boundary ranges for one or more operational parameters of a plurality of operational parameters. Further, the method comprises determining that the one or more operational parameters, is outside of the one or more boundary ranges determined for the one or more operational parameters. The method further comprises predicting a fuel consumption of the cement manufacturing kiln during a time period during which the one or more operational parameters is outside of the one or more boundary ranges. The method further comprises generating a control signal based on the determination that the one or more operational parameters, is outside of the one or more boundary ranges, wherein the control signal is configured to optimize the fuel consumption of the cement manufacturing kiln.

To remove deposit while suppressing heat energy reduction when conveying an adhesive granular material including meat and bone meal or the like in cement production equipment or the like.SOLUTION: An adhesive granular material including meat and bone meal is conveyed into a pipe for conveying adhesive granular material, and in the middle of the conveyance, conveyance is switched to conveyance of adhesive granular material to convey dried sewage sludge for a predetermined period of time and remove the deposit in the pipe, and then, the adhesive granular material is conveyed again. Switching between the adhesive granular material and dried sewage sludge may be performed while detecting a pressure fluctuation inside the pipe for conveying adhesive granular material.SELECTED DRAWING: Figure 1

The invention provides a combustion method using a fuel combustion device, a cement manufacturing method, and a cement firing facility provided with the fuel combustion device, and the fuel combustion device is provided with a fuel supply mechanism. The fuel supply mechanism is provided with a combustible powder supply mechanism for supplying combustible powder, a fuel gas supply mechanism for supplying fuel gas, and a non-combustible powder supply mechanism for supplying non-combustible powder. The present invention provides a combustion method using a fuel combustion device, a method for manufacturing cement, and a cement firing facility provided with the fuel combustion device, which can reduce the amount of fossil fuel (as fuel supplied to the fuel combustion device provided in various facilities such as the cement firing facility), and maintain the amount of radiant heat transfer from various burners, thereby reducing the amount of fossil fuel used as fuel supplied to the fuel combustion device provided in the various facilities such as the cement firing facility. As a result, the amount of heat transferred to a heated object such as a powder raw material of cement clinker is maintained so as to maintain a state suitable for firing the heated object, the amount of carbon dioxide discharged from the various devices is reduced, and the various devices can be operated at low cost.

The utility model relates to cement manufacturing technical field, concretely relates to a bulk cement loading device, including support frame, steel sheet storehouse, support plate, drainage main pipe and drainage branch pipe, the number of steel sheet storehouse is three, three steel sheet storehouse is fixedly connected with support frame respectively, and is passed through support frame respectively, support plate is fixedly connected with support frame, and is located the middle of support frame, the number of drainage main pipe is a plurality, a plurality of drainage main pipe is fixedly connected with support plate respectively, and is passed through support plate respectively, the number of drainage branch pipe is two, two drainage branch pipes are fixedly connected with the steel sheet storehouse in the middle respectively, and are located the top of drainage main pipe respectively, solved the problem that the cement management variety increases, leads to the problem that the shipment channel is short of and influences shipment efficiency.

To provide a method and equipment for effectively utilizing exhaust gas from cement manufacturing equipment.SOLUTION: The method for utilizing the cement exhaust gas comprises a step (a step) of adding nitric acids to CaCO3 and reacting them to form carbon dioxide and a Ca (NO3) 2 aqueous solution and recovering the carbon dioxide, and a step (b step) of heating and dehydrating the Ca (NO3) 2 aqueous solution. A step (b step) of generating CaO and NOx and discharging the NOx to the outside of the system, a step (c step) of adding H2O to CaO and reacting them to prepare Ca (OH) 2, and a step (d step) of bringing cement exhaust gas into contact with Ca (OH) 2 and reacting it with carbon dioxide in the Ca (OH) 2 exhaust gas; The method includes a step (d step) of preparing CaCO3 and circulating and using the CaCO3 as the CaCO3 in the step (a), and a step (e step) of bringing NOx produced in the step (b) into contact with water to prepare nitrate and circulating and using the nitrate as the nitrate in the step (a).SELECTED DRAWING: Figure 1

The present disclosure relates to a system and method of carbon-neutral cement production, which can be achieved by incorporating an electro-synthesizer system, an acid leaching system, and an alkalinization / precipitation system into the cement manufacturing process. The system and method enables the robust processing of various serpentine-containing materials, while mitigating emissions associated with cement production. The Mg cement produced can be incorporated into building materials.

The utility model relates to the technical field of cement manufacturing, and provides a powder concentrator of a roller press of a cement grinding mill. The inner grinding cylinder is arranged in the shell, and a fine powder outlet is formed in one end of the inner grinding cylinder; the two cement particle inlets are formed in the surfaces of the symmetrical positions of the inner grinding cylinder, and limiting grooves are formed in the symmetrical positions of the inner wall of the inner grinding cylinder; and the hydraulic cylinder is fixedly arranged on the inner wall of the inner grinding cylinder. According to the cement raw material grinding device, materials are put into the inner grinding cylinder through the raw material putting pipe, the driving motor is started to work, the grinding roller is driven to rotate and is matched with the grinding part on the inner wall to grind the cement raw materials, and when the ground granularity cannot meet the requirement, the hydraulic cylinder is started to work, the output end mounting frame is driven to move along the limiting groove, and the cement raw materials are ground. And a driving motor on the surface of the mounting frame is driven to move upwards to be better attached to the grinding part, finer grinding is completed, and therefore the applicability of the device is improved.

The application discloses a composite functional additive suitable for cement kiln collaborative disposal of heavy metal-containing waste and belongs to the technical field of cement manufacturing. According to mass fractions, the composite functional additive comprises the following components: mineralization components 30-50 parts, heavy metal adsorption components 30-50 parts and high-temperature-resistant components 10-20 parts. The mineralization components comprise CaF2, SrO, ZnO and MgO; the heavy metal adsorption components comprise attapulgite, bauxite and calcium oxide; and the high-temperature-resistant components comprise aluminum oxide and fly ash. Through scientific research and practice test, the composite functional additive with heavy metal solidification and mineralization functions is successfully prepared, and the process safety of the cement kiln collaborative disposal of the heavy metal-containing waste and the clinker product quality can be improved.

The invention provides a method for recycling waste from a cement manufacturing process and effectively utilizing the waste and a useful system for implementing the method. According to the method, calcium carbonate generated by waste from a cement manufacturing process and hydrochloric acid generated in the middle process are effectively utilized and used for preparing vinyl chloride resin and the like. A method for recycling waste generated from a cement manufacturing process, in which an aqueous solution containing potassium chloride, which is obtained by washing chlorine bypass dust generated from the cement manufacturing process, is subjected to electrodialysis treatment, thereby producing hydrochloric acid water and an aqueous solution containing potassium hydroxide; a portion of hydrochloric acid water is added to calcium-containing waste to produce an aqueous solution containing calcium ions, the pH of the aqueous solution containing calcium ions is adjusted and impurities are separated, carbon dioxide from a cement manufacturing process is brought into contact with an aqueous solution containing potassium hydroxide obtained by electrodialysis treatment to produce an aqueous solution containing potassium carbonate, and the aqueous solution containing potassium carbonate is separated from the aqueous solution containing potassium carbonate. The aqueous solution containing calcium ions and potassium carbonate that have been subjected to the separation step are used to generate calcium carbonate and an aqueous solution containing potassium chloride, and a portion of the hydrochloric acid water obtained by the electrodialysis or the generated calcium carbonate is used in the production of a vinyl chloride resin or the like.

The utility model discloses a dust collection device for a cement manufacturing production line, which comprises a first supporting seat, a second supporting seat and a first suction assembly for sucking waste raised dust and available raised dust, and further comprises a mounting box, a recycling box, a cleaning assembly, a second suction assembly and a third suction assembly, the outer wall of the mounting box is fixedly connected with the first suction assembly, a net partition plate is arranged in the mounting box, so that a first inner cavity and a second inner cavity are formed in the mounting box, and the first inner cavity communicates with the first suction assembly; the first supporting seat and the second supporting seat are fixed to the recycling box, a filtering assembly is arranged in the recycling box, so that a plurality of recycling cavities are formed in the recycling box, and the recycling cavities communicate with the first inner cavity; the cleaning assembly is arranged on the recycling box and used for removing waste flying dust. The second suction assembly is arranged on the cleaning assembly, communicates with the second inner cavity and the cleaning assembly and is used for sucking the waste poplar dust into the cleaning assembly.

A method of operating a cement manufacturing plant, the plant comprising a preheater (2) for preheating cement raw meal, a cement kiln (1) for calcining preheated raw meal coming from the preheater (2), a flue gas treatment installation (4) for treating flue gas (19) coming from the cement kiln (1) by means of selective catalytic reduction, and a gasifier (6) for carrying out a gasification process that produces syngas (10) from a waste material (7), the method comprising: - separating ammonia (11) from the syngas (10), - introducing at least a partial amount of the ammonia (11) into the flue gas treatment installation (4) as a reductant in the selective catalytic reduction process and / or introducing at least a partial amount of the ammonia (11) into the preheater (2) as a reductant for a selective non- catalytic reduction process, - recovering thermal energy (12) from the gasification process by means of a heat exchanger (27,28) and feeding said thermal energy (12) to the flue gas treatment installation (4).

The utility model relates to the field of cement raw material conveying, and discloses a raw material conveying device for cement manufacturing, which comprises a surge bin, the surge bin is fixed on the inner wall of a mounting frame, a bearing plate is fixed on the bottom surface of the mounting frame, a fixing frame is fixed on the inner wall of the surge bin, and a driving motor is fixed on the inner wall of the fixing frame. And a plurality of stirring blades are fixed to the outer wall of an output shaft of the driving motor and symmetrically distributed on the outer wall of the output shaft of the driving motor, a limiting disc is rotatably arranged on the inner wall of the buffering bin, and a rotating hole is formed in the top face of the limiting disc. According to the utility model, the driving motor is matched with the limiting disc and the buffer plate, so that the blanking speed of raw materials in the buffer bin can be controlled, and overload or blockage of conveying equipment caused by one-time massive blanking of the raw materials is effectively prevented, so that the stability and continuity of the conveying process are ensured, and the conveying efficiency of the conveying device is further improved; and equipment faults are reduced.

Method of producing a reactive material in a cement manufacturing plant comprising a cement kiln (1) and a clinker cooler (2), a head region (20) of the clinker cooler (2) being connected to an outlet end of the cement kiln (1) for cooling cement clinker coming from the cement kiln, the method comprising: - providing a calcium silicate mineral material susceptible of becoming reactive upon thermal treatment, - introducing the calcium silicate mineral material into the clinker cooler (2) and thermally activating the calcium silicate mineral material in the clinker cooler (2) at a temperature of 600-900°C, in order to obtain said reactive material.

The present invention provides a method for recycling waste from a cement manufacturing process and effectively utilizing the waste, and a useful system for implementing the method, which effectively utilizes calcium carbonate generated using waste from a cement manufacturing process and hydrochloric acid generated in the middle of the process for the production of vinyl chloride resin and the like. A recycling method of waste generated from a cement manufacturing process, wherein an aqueous solution containing potassium chloride obtained by water washing of chlorine bypass dust generated from a cement manufacturing process is subjected to electrodialysis treatment to generate hydrochloric acid water and an aqueous solution containing potassium hydroxide, a part of the hydrochloric acid water is added to calcium-containing waste to generate an aqueous solution containing calcium ions, the pH of the aqueous solution containing calcium ions is adjusted and impurities are separated, carbon dioxide from a cement manufacturing process is contacted with the aqueous solution containing potassium hydroxide obtained by the electrodialysis treatment to generate an aqueous solution containing potassium carbonate, the aqueous solution containing calcium ions after the separation process and the potassium carbonate are used to generate calcium carbonate and an aqueous solution containing potassium chloride, and a part of the hydrochloric acid water obtained by the electrodialysis or the generated calcium carbonate is used for the production of vinyl chloride resin and the like.

The present invention relates to a method and system (100) for automated industrial process optimization of a cement manufacturing process based on historical operator actions. The system (100) includes sensors to monitor current parameters and a data storage unit to store historical data and operator actions. The processor (202) detects a first process disturbance by monitoring current parameters and comparing them with historical data to identify a second similar disturbance. The processor (202) determines historical operator actions preceding the second disturbance and analyzes their effectiveness in stabilizing the process. The system (100) then implements these actions to control and stabilize the current process disturbance. The method includes storing historical actions in a Digitized Database (408), training machine learning algorithms, and verifying action effectiveness. This approach ensures consistent product quality, operational efficiency, and reduced energy consumption by leveraging advanced AI models and historical data for process optimization.

The utility model relates to the technical field of cement manufacturing, and discloses a sewage mud-water separation mechanism which comprises a belt filter press, a cofferdam located above filter cloth, an angle-adjustable material distribution assembly arranged on the inner side of the cofferdam and used for distributing materials to be dewatered, and a height-limiting assembly used for conveying the materials to be dewatered in a height-limiting manner are arranged on a rack of the belt filter press; the angle-adjustable material distribution assembly comprises a material distribution plate and a connecting rod A fixedly arranged above the material distribution plate; the height-adjustable height limiting assembly comprises a height limiting plate and a connecting rod B fixedly arranged above the height limiting plate. Through the arrangement of the cofferdam, the material distribution assembly and the height limiting assembly, materials to be dehydrated can be more uniformly distributed, the distribution of the materials on the filter cloth is optimized, the solid-liquid separation effect is improved, and the height and distribution of the materials are effectively controlled, so that the friction force needing to be overcome when the materials are pushed is reduced, the energy consumption is reduced, and the energy efficiency ratio of equipment is improved.

A wastewater treatment system, including a wastewater phase-separation device, may be used to combine at least one primary treatment chemical and wastewater to produce cleaned water and a sludge byproduct. The wastewater treatment system may also include a wastewater dewatering device that may be used to combine the sludge byproduct and at least one secondary treatment chemical to produce a Medium to High Solids Content Sludge without excess water. A method for producing sludge for cement manufacturing may include combining wastewater and at least one primary treatment chemical to form a liquid phase and a solid phase, where the liquid phase includes clean water and the solid phase includes a sludge byproduct, separating the liquid phase from the solid phase, combining the solid phase with at least one secondary treatment chemical to form an intermediate that contains excess water, and removing the excess water from the intermediate to form a Medium to High Solids Content Sludge.

A method of operating a cement manufacturing plant, the plant comprising a preheater (2) for preheating cement raw meal, a cement kiln (1) for calcining preheated raw meal coming from the preheater (2), a flue gas treatment installation (4) for treating flue gas (19) coming from the cement kiln (1) by means of selective catalytic reduction, and a gasifier (6) for carrying out a gasification process that produces syngas (10) from a waste material (7), the method comprising: - separating ammonia (11) from the syngas (10), - introducing at least a partial amount of the ammonia (11) into the flue gas treatment installation (4) as a reductant in the selective catalytic reduction process and / or introducing at least a partial amount of the ammonia (11) into the preheater (2) as a reductant for a selective non-catalytic reduction process, - recovering thermal energy (12) from the gasification process by means of a heat exchanger (27,28) and feeding said thermal energy (12) to the flue gas treatment installation (4) .