System and method for co-processing slurry solid waste and desulfurization wastewater

Abstract

The invention provides a system and a method for co-processing slurry solid waste and desulfurization wastewater. The system comprises a storage tank, a pumping system, a pulverizing system and a boiler, the storage tank is used for stirring the to-be-treated slurry solid waste or the slurry solid waste and desulfurization wastewater to obtain a slurry material and outputting the slurry material to the pumping system; the pumping system is used for conveying the slurry material to the pulverizing system; and the coal pulverizing system is used for mixing the slurry material and the solid fuel to obtain a mixed material, drying and grinding the mixed material to obtain a ground material, and conveying the ground material to the boiler, so that the boiler combusts the ground material as fuel. By means of the system, incineration disposal of the slurry solid waste and the desulfurization waste water can be achieved, the waste utilization rate is increased, the slurry solid waste and the solid fuel can be prevented from making contact and caking in the conveying pipeline, then local accumulation or blockage of materials can be avoided, and production safety can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of waste treatment, and in particular to a system and method for the coordinated treatment of slurry solid waste and desulfurization wastewater. Background Art

[0002] In various industrial production activities, a large amount of slurry solid waste, that is, solid waste with slurry characteristics, is usually generated. For example, in production scenarios where coal is used, such as coal-fired power plants, the coal combustion and gasification process of coal-fired equipment will produce a large amount of slurry solid waste such as coal gasification ash. For another example, a large amount of slurry solid waste such as municipal sludge will be generated in municipal activities, and a large amount of slurry solid waste such as industrial sludge will be generated in industrial activities. In the waste treatment process, slurry solid waste needs to be treated.

[0003] With the development of waste treatment technology, the disposal of slurry solid waste has gradually changed from the original landfill method to incineration. In the relevant disposal methods of slurry solid waste, the slurry solid waste is usually transported to the coal yard, where it is mixed with coal, and the mixture of slurry solid waste and coal is used as the raw material of the coal-fired boiler, and then the slurry solid waste is incinerated.

[0004] The inventors have found through research that due to the high water content of slurry solid waste, when the slurry solid waste is mixed with coal, the slurry material adheres to the coal particles, and the mixture is prone to agglomeration. During the transportation of the mixture, it is easy to cause local accumulation or blockage of materials in the material transportation pipeline, which poses a major hidden danger to production safety and is not conducive to ensuring the normal operation of the production system, resulting in poor stability and safety of the production system. In addition, some slurry solid waste has odor or volatility. When mixed with coal in the coal yard, it will cause the surrounding area to be affected by the odor, causing environmental pollution. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a system and method for the coordinated disposal of slurry solid waste and desulfurization wastewater to solve the problem that related disposal technologies for slurry solid waste easily cause local accumulation or blockage of materials in the material conveying pipeline, causing adverse effects on production safety.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] A system for co-disposing slurry solid waste and desulfurization wastewater, comprising:

[0008] Storage tanks, pumping systems, milling systems and boilers;

[0009] The discharge end of the storage tank is connected to the feed end of the pumping system;

[0010] The pulverizing system is provided with a first feed end and a second feed end, the discharge end of the pumping system is connected to the first feed end of the pulverizing system, the second feed end of the pulverizing system is connected to the solid fuel conveying system, and the discharge end of the pulverizing system is connected to the burner of the boiler;

[0011] In the system for the coordinated disposal of slurry solid waste and desulfurization wastewater, each conveying pipeline for conveying materials is a closed pipeline;

[0012] The storage tank is used to receive the waste materials to be disposed, stir the waste materials to obtain slurry materials, and output the slurry materials to the pumping system; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater;

[0013] The pumping system is used to transport the slurry material to the milling system;

[0014] The pulverizing system is used to mix the slurry material and the solid fuel to obtain a mixed material, dry-grind the mixed material to obtain a ground material, and transport the ground material to the boiler so that the boiler burns the ground material as fuel.

[0015] In the above-mentioned system for coordinated disposal of slurry solid waste and desulfurization wastewater, optionally, a stirring device is provided in the storage tank.

[0016] In the above-mentioned system for coordinated disposal of slurry solid waste and desulfurization wastewater, optionally, an arch-breaking slide is further provided in the storage tank.

[0017] In the above-mentioned system for coordinated disposal of slurry solid waste and desulfurization wastewater, optionally, the pulverizing equipment in the pulverizing system is a coal mill.

[0018] In the above-mentioned system for coordinated treatment of slurry solid waste and desulfurization wastewater, optionally, the boiler is a coal-fired boiler and the solid fuel is coal.

[0019] The above-mentioned system for coordinated treatment of slurry solid waste and desulfurization wastewater may optionally further include: a hot air heating system;

[0020] The hot air heating system is arranged on the hot primary air duct of the powder making system;

[0021] The hot air heating system is used to heat the hot primary air of the powder making system.

[0022] The above-mentioned system for coordinated treatment of slurry solid waste and desulfurization wastewater can optionally use the smoke emitted by the boiler as a drying heat source for the pulverizing system.

[0023] In the above-mentioned system for coordinated disposal of slurry solid waste and desulfurization wastewater, optionally, the second feed end in the pulverizing system is also connected to a delivery pipeline of an auxiliary fuel so as to mix the auxiliary fuel into the mixed material.

[0024] A method for co-disposing slurry solid waste and desulfurization wastewater, comprising:

[0025] Stirring the waste materials to be disposed of to obtain slurry materials; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater;

[0026] The slurry material is transported to a powder making system by means of closed conveying, the slurry material and a solid fuel are mixed by the powder making system to obtain a mixed material, and the mixed material is dry-ground to obtain a ground material;

[0027] The ground material is transported to the boiler in a closed transport manner, so that the boiler burns the ground material as fuel.

[0028] In the above method, optionally, if the waste material is slurry-like solid waste, the method further comprises:

[0029] During the process of mixing the slurry material and the solid fuel, an auxiliary fuel is added for mixing.

[0030] A system for coordinated treatment of slurry solid waste and desulfurization wastewater based on the above-mentioned embodiment of the present invention includes: a storage tank, a pumping system, a pulverizing system and a boiler; the discharge end of the storage tank is connected to the feed end of the pumping system; the pulverizing system is provided with a first feed end and a second feed end, the discharge end of the pumping system is connected to the first feed end of the pulverizing system, the second feed end of the pulverizing system is connected to the solid fuel conveying system, and the discharge end of the pulverizing system is connected to the burner of the boiler; each conveying pipeline for conveying materials is a closed pipeline; the storage tank , used to receive the waste materials to be disposed of, stir the waste materials to obtain slurry materials, and output the slurry materials to the pumping system; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater; the pumping system is used to transport the slurry materials to the pulverizing system; the pulverizing system is used to mix the slurry materials and the solid fuel to obtain a mixed material, dry and grind the mixed material to obtain a ground material, and transport the ground material to the boiler so that the boiler burns the ground material as fuel. The system for the coordinated disposal of slurry solid waste and desulfurization wastewater provided by the embodiment of the present invention can first mix the slurry solid waste with desulfurization wastewater during the disposal of the slurry solid waste, and use the mixture of the two as a slurry material, or use the slurry solid waste alone as a slurry material, and then transport the material to the pulverizing system through the pumping system to mix with the solid fuel, and the pulverizing system performs dry grinding, and finally achieves incineration disposal. Before the material enters the pulverizing system, the slurry solid waste and solid fuel are transported independently, and a mixture of slurry solid waste and solid fuel will not be formed, nor does it need to be transported. This can avoid the agglomeration of materials during material transportation, effectively avoid local accumulation or blockage of materials, and help ensure the normal operation of the production system and improve production stability and safety. In addition, the system can achieve the coordinated disposal of slurry solid waste and desulfurization wastewater, achieve zero discharge and waste recycling of slurry solid waste and desulfurization wastewater, and simultaneously improve the utilization rate of slurry solid waste and desulfurization wastewater. In addition, all the conveying pipelines used to transport materials in the system are closed pipelines, which can prevent the release of odor from the material from affecting the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0032] Figure 1A schematic diagram of the structure of a system for coordinated treatment of slurry solid waste and desulfurization wastewater provided in an embodiment of the present invention;

[0033] Figure 2 Another structural schematic diagram of a system for coordinated treatment of slurry solid waste and desulfurization wastewater provided by an embodiment of the present invention;

[0034] Figure 3 Another structural schematic diagram of a system for coordinated treatment of slurry solid waste and desulfurization wastewater provided by an embodiment of the present invention;

[0035] Figure 4 A method flow chart of a method for coordinated disposal of slurry solid waste and desulfurization wastewater provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0038] An embodiment of the present invention provides a system for the coordinated disposal of slurry solid waste and desulfurization wastewater. The system can be applied to waste disposal scenarios of slurry solid waste. The slurry solid waste can be gasification ash generated during coal combustion or sludge generated in municipal / industrial activities, and can coordinate the disposal of desulfurization wastewater generated during coal combustion.

[0039] The structural schematic diagram of the system for coordinated treatment of slurry solid waste and desulfurization wastewater provided by the embodiment of the present invention can be shown as follows: Figure 1 As shown, the system includes:

[0040] A material storage tank 101, a pumping system 102, a powder making system 103 and a boiler 104;

[0041] The discharge end of the storage tank 101 is connected to the feed end of the pumping system 102;

[0042] The pulverizing system 103 is provided with a first feed end and a second feed end, the discharge end of the pumping system 102 is connected to the first feed end of the pulverizing system 103, the second feed end of the pulverizing system 103 is connected to a solid fuel conveying system, and the discharge end of the pulverizing system 103 is connected to the burner of the boiler 104;

[0043] In the system for the coordinated disposal of slurry solid waste and desulfurization wastewater, each conveying pipeline for conveying materials is a closed pipeline;

[0044] The storage tank 101 is used to receive the waste materials to be disposed, stir the waste materials to obtain slurry materials, and output the slurry materials to the pumping system 102; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater;

[0045] The pumping system 102 is used to transport the slurry material to the powder making system 103;

[0046] The pulverizing system 103 is used to mix the slurry material and the solid fuel to obtain a mixed material, dry-grind the mixed material to obtain a ground material, and transport the ground material to the boiler 104 so that the boiler 104 burns the ground material as fuel.

[0047] In the system for coordinated disposal of slurry solid waste and desulfurization wastewater provided in the embodiment of the present invention, a storage tank, a pumping system, a pulverizing system and a boiler are provided.

[0048] The feed end of the storage tank is used to realize the feeding of waste materials to be disposed of, and the waste materials to be disposed of can be slurry solid waste, or can include slurry solid waste and desulfurization wastewater, that is, the system can only process slurry solid waste, or can simultaneously process slurry solid waste and desulfurization wastewater. The feeding method of the waste materials is related to the transportation method of the two types of waste. For example, if both types of waste are transported by pipeline, then the feed can be fed through the pipeline, and the feed end of the storage tank can be connected to the transportation pipeline of the two types of waste respectively, that is, the feed end of the storage tank is connected to the transportation pipeline of the slurry solid waste, and is connected to the transportation pipeline of the desulfurization wastewater. If the slurry solid waste is transported by vehicle and the desulfurization wastewater is transported by pipeline, then the feed end is connected to the transportation pipeline of the desulfurization wastewater on the one hand, and a feed port can be set on the other hand for feeding the slurry solid waste. The slurry solid waste in the embodiment of the present invention can be solid waste with slurry characteristics such as coal-based gasification slag.

[0049] In the embodiment of the present invention, the discharge end of the storage tank is connected to the feed end of the pumping system, that is, the material output from the storage tank after processing can enter the pumping system, and the pumping system can transport the material at its feed end to its discharge end.

[0050] The discharge end of the pumping system is connected to the first feed end of the pulverizing system, that is, the material transported by the pumping system will enter the pulverizing system. The second feed end of the pulverizing system is connected to the solid fuel delivery system. The pulverizing system will mix, dry and grind the materials entering the pulverizing system to achieve material pulverization, thereby outputting solid materials with relatively low particle size, usually powdered materials.

[0051] The discharge end of the pulverizing system is connected to the burner of the boiler, that is, the material produced by the pulverizing system will pass through the burner of the boiler and enter the furnace of the boiler as fuel for combustion. The boiler is an energy conversion device that uses the chemical energy in the fuel input into the boiler to output steam, high-temperature water or organic heat carrier with a certain amount of thermal energy.

[0052] In the system provided by the embodiment of the present invention, the conveying pipelines used to convey materials in each link are all closed pipelines. That is, the conveying pipeline for the slurry solid waste to be input to the storage tank, the conveying pipeline for the desulfurization wastewater to be input to the storage tank, the conveying pipeline for the solid fuel to be input to the pulverizing system, the conveying pipeline from the storage tank to the pumping system, the conveying pipeline from the pumping system to the pulverizing system, and the conveying pipeline from the pulverizing system to the boiler are all designed as closed pipelines.

[0053] During the operation of the system for coordinated disposal of slurry solid waste and desulfurization wastewater provided in an embodiment of the present invention, the slurry solid waste and desulfurization wastewater generated in the production process can be transported to the storage tank through their corresponding transportation methods, respectively. The storage tank can mix the slurry solid waste and desulfurization wastewater entering the storage tank to obtain a mixed slurry material. It can be understood that if only the slurry solid waste is processed, the storage tank only stirs the slurry solid waste, and the stirred slurry solid waste is the slurry material output by the storage tank. The slurry material is transported to the pumping system through the discharge end, and specifically can be transported to the feeding device (feeder) of the pumping system. The pumping system can transport the slurry material entering the pumping system to the pulverizing system, and at the same time, the solid fuel suitable for use as boiler fuel is transported to the pulverizing system through its corresponding transportation system.

[0054] The pulverizing system will mix, dry and grind the materials entering the system, that is, the pulverizing system will mix the slurry material and the solid fuel, dry the mixture, grind the dried mixture, so as to obtain a relatively low-size, dry mixture. The pulverizing system can transport the ground material to the burner of the boiler to burn the material as boiler fuel. It can be understood that the pulverizing system is provided with pulverizing equipment, which can be used to dry and grind the material, that is, it can realize the material pulverizing function.

[0055] After the above treatment, the slurry solid waste and desulfurization wastewater generated in the production process will be dried and ground along with the solid fuel. The powdered material formed by mixing the slurry solid waste, desulfurization wastewater and solid fuel will enter the boiler furnace for combustion, thereby realizing the incineration disposal of the slurry solid waste and desulfurization wastewater and recycling the slurry solid waste and desulfurization wastewater.

[0056] A system for coordinated treatment of slurry solid waste and desulfurization wastewater based on the above-mentioned embodiment of the present invention includes: a storage tank, a pumping system, a pulverizing system and a boiler; the discharge end of the storage tank is connected to the feed end of the pumping system; the pulverizing system is provided with a first feed end and a second feed end, the discharge end of the pumping system is connected to the first feed end of the pulverizing system, the second feed end of the pulverizing system is connected to the solid fuel conveying system, and the discharge end of the pulverizing system is connected to the burner of the boiler; each conveying pipeline for conveying materials is a closed pipeline; the storage tank , used to receive the waste materials to be disposed, stir the waste materials to obtain slurry materials, and output the slurry materials to the pumping system; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater; the pumping system is used to transport the slurry materials to the pulverizing system; the pulverizing system is used to mix the slurry materials and the solid fuel to obtain a mixed material, dry and grind the mixed material to obtain a ground material, and transport the ground material to the boiler so that the boiler burns the ground material as fuel. The system for the coordinated disposal of slurry solid waste and desulfurization wastewater provided by the embodiment of the present invention is used. During the disposal process of slurry solid waste, it is first mixed with desulfurization wastewater, and then transported to the pulverizing system through the pumping system to mix with solid fuel, and then dried and ground by the pulverizing system, and finally incineration disposal is achieved. The coordinated disposal of slurry solid waste and desulfurization wastewater can be achieved, and the zero discharge and waste recycling of slurry solid waste and desulfurization wastewater can be achieved, and the utilization rate of slurry solid waste and desulfurization wastewater can be improved simultaneously. Moreover, before the materials enter the pulverizing system, the slurry solid waste and solid fuel are transported independently, and a mixture of the slurry solid waste and solid fuel will not be formed, nor is there a need to transport the mixture. This can avoid material agglomeration during material transportation, and can effectively avoid local accumulation or blockage of materials, which is beneficial to ensuring the normal operation of the production system and improving production stability and safety.

[0057] exist Figure 1 Based on the system for coordinated treatment of slurry solid waste and desulfurization wastewater shown, in the system provided by an embodiment of the present invention, a stirring device is provided in the storage tank.

[0058] In the system provided in the embodiment of the present invention, a stirring device is provided in the storage tank. During the operation of the system, the stirring device can stir the materials in the storage tank, such as stirring the mixture of slurry solid waste and desulfurization wastewater.

[0059] Based on the system provided by the embodiment of the present invention, the stirring device in the storage tank can stir the mixed materials, which is conducive to ensuring uniform mixing of slurry solid waste and desulfurization wastewater.

[0060] On the basis of the system for coordinated disposal of slurry solid waste and desulfurization wastewater provided in the above-mentioned embodiment, in the system provided in the embodiment of the present invention, an arch-breaking slide is further provided in the storage tank.

[0061] In the system provided by the embodiment of the present invention, a arch-breaking slide is further provided in the storage tank, and the arch-breaking slide is a type of arch-breaking device, which is used to break the material arch blockage. During the operation of the system, the arch-breaking slide can break the arch of the mixture of slurry solid waste and desulfurization wastewater.

[0062] Based on the system provided in the embodiment of the present invention, the arch-breaking slide can break the arch of the material in the storage tank, which is beneficial to ensure that the mixed material of slurry solid waste and desulfurization wastewater in the storage tank does not bridge, and is beneficial to ensure that the material smoothly enters the feeding device of the pumping system.

[0063] exist Figure 1 Based on the system for coordinated treatment of slurry solid waste and desulfurization wastewater shown, in the system provided by an embodiment of the present invention, the pulverizing equipment in the pulverizing system is a coal mill.

[0064] In the system provided by the embodiment of the present invention, the pulverizing equipment in the pulverizing system is a coal mill, which can grind the mixture of the slurry material and the solid fuel.

[0065] Based on the system provided by the embodiment of the present invention, a coal mill is used as a pulverizing device, which can effectively grind difficult-to-grind materials, is conducive to obtaining materials with lower particle sizes, and is conducive to improving the combustion rate of materials.

[0066] exist Figure 1 Based on the system for coordinated treatment of slurry solid waste and desulfurization wastewater shown, in the system provided by an embodiment of the present invention, the boiler is a coal-fired boiler and the solid fuel is coal.

[0067] In the system provided by the embodiment of the present invention, a coal-fired boiler is used as a boiler for burning materials, and coal is used as a solid fuel.

[0068] exist Figure 1 Based on the system of co-treatment of slurry solid waste and desulfurization wastewater, as shown in Figure 2 As shown, the system provided by the embodiment of the present invention further includes: a hot air heating system 105;

[0069] The hot air heating system 105 is arranged on the hot primary air duct of the powder making system;

[0070] The hot air heating system 105 is used to heat the hot primary air of the powder making system.

[0071] In the system provided in the embodiment of the present invention, a hot air heating system is further provided. The hot air heating system is provided on the hot primary air duct of the milling system. It can be understood that the hot primary air duct of the milling system is a duct for conveying hot primary air to the milling system, and the hot air heating system provided on the hot primary air duct will heat the hot primary air conveyed to the milling system to increase the temperature of the hot primary air.

[0072] Based on the method provided in the embodiment of the present invention, the hot primary air of the powder making system can be heated by the hot air heating system, so as to further increase the hot air temperature of the powder making system, thereby improving the drying output of the powder making system, which is beneficial to ensure that the powder making system can normally dry the material when the moisture content of the material is high.

[0073] exist Figure 1 On the basis of the system for coordinated treatment of slurry solid waste and desulfurization wastewater shown, in the system provided by an embodiment of the present invention, the flue gas discharged by the boiler is used as the drying heat source of the pulverizing system.

[0074] In the system provided by an embodiment of the present invention, the smoke emitted by the boiler is used as a drying heat source for the powder making system. Specifically, the smoke exhaust pipe of the boiler and the heat source pipe of the powder making system can be connected, that is, the high-temperature smoke of the boiler is introduced into the powder making system as the heat source of the powder making system.

[0075] Based on the system provided by the embodiment of the present invention, high-temperature furnace smoke can be introduced into the powder making system, which can be used to increase the hot air temperature of the powder making system, which is beneficial to improving the drying output of the powder making system.

[0076] exist Figure 1 Based on the system for coordinated disposal of slurry solid waste and desulfurization wastewater shown, in the system provided by an embodiment of the present invention, the second feed end of the pulverizing system is also connected to the delivery pipeline of the auxiliary fuel to mix the auxiliary fuel into the mixed material.

[0077] In the system provided by the embodiment of the present invention, the second feed end of the pulverizing system is also connected to the delivery pipeline of the auxiliary fuel, that is, during the operation of the pulverizing system, the auxiliary fuel can enter the pulverizing system through its corresponding delivery pipeline to assist combustion. When the pulverizing system mixes the slurry material and the solid fuel, it will also mix the auxiliary fuel. The auxiliary fuel can be a high-calorie fuel. Usually, when the slurry material is only slurry solid waste, the high-calorie fuel is added to assist combustion.

[0078] Based on the system provided in the embodiment of the present invention, when the pulverizing system mixes the slurry material and the solid fuel, auxiliary fuel may be further added to increase the calorific value of the ground material, which is beneficial to enhance the ignition of the material.

[0079] In order to better illustrate the system for the coordinated treatment of slurry solid waste and desulfurization wastewater provided by the embodiment of the present invention, based on the systems provided in the above embodiments and in combination with actual application scenarios, the embodiment of the present invention provides another system for the coordinated treatment of slurry solid waste and desulfurization wastewater. Figure 3 The system provided in the embodiment of the present invention mainly includes:

[0080] The material storage tank 201 , the arch breaking slide 202 , the pumping system 203 , the coal mill (pulverizing system) 204 , the hot air heating system 205 , the boiler burner 206 and the boiler furnace 207 .

[0081] In general, the system provided by the embodiment of the present invention is used to achieve the coordinated disposal of slurry solid waste and desulfurization wastewater. After the waste is evenly mixed by a stirring device, it is pumped to the pulverizing system of the coal-fired boiler, which realizes the transportation of slurry solid waste and the coordinated disposal of desulfurization wastewater.

[0082] Next, the structure of the system of the embodiment of the present invention is briefly described.

[0083] In the system provided by the embodiment of the present invention, a stirring device and an arch-breaking slide are arranged in the storage tank. The stirring device can be used to achieve uniform mixing of materials in the storage tank, and the arch-breaking slide can be used to achieve no bridging of materials in the storage tank, and the two together ensure that the materials can enter the feeding device of the pumping system uniformly and smoothly.

[0084] In the system provided by the embodiment of the present invention, a slurry material inlet pipeline is arranged above the coal mill, and the slurry material is directly transported to the mill through a pumping system and does not contact with the coal (solid fuel) before entering the coal mill.

[0085] Since the slurry material contains a large amount of moisture, when a large amount of slurry material is mixed into the powder making system, it will affect the drying output of the powder making system. In the system provided by the embodiment of the present invention, a hot air heating system is added to the hot primary air duct of the powder making system, which can increase the inlet temperature of the coal mill by 20°C to 50°C, thereby improving the drying output of the powder making system.

[0086] In the system provided by the embodiment of the present invention, each material conveying pipeline adopts a closed pipeline.

[0087] like Figure 3As shown in the figure, during the waste disposal process, the slurry solid waste and desulfurization wastewater are transported to the storage tank separately, and are evenly mixed by the stirring device in the storage tank to become a slurry material with good fluidity. The slurry material in the storage tank is sent to the pulverizing system through the pumping system, and after being mixed with the coal, it is dried, heated and ground into powder by the pulverizing system, and then sent to the furnace of the coal-fired boiler for combustion. Desulfurization wastewater, as a carrier for slurry solid waste, enters the furnace of the coal-fired boiler for high-temperature incineration, which can decompose and transform the harmful substances in it, and realize zero-emission disposal of desulfurization wastewater.

[0088] Furthermore, high-temperature furnace smoke can be extracted and introduced into the powder making system to further improve the drying output of the powder making system.

[0089] For difficult-to-grind and difficult-to-burn slurry solid waste, such as coal gasification slag, a newly added ultra-fine powder grinding device can be used for grinding, so that the particle size of the export material is lower, in order to improve the combustion rate of the material.

[0090] Since the slurry material has a low calorific value, high-calorie fuel can be mixed into the pulverizing system to increase the ignition intensity of the slurry material after it is ground and enters the furnace, thereby strengthening the combustion of the material.

[0091] The system provided by the embodiment of the present invention has no direct contact with the original coal transportation system, and can solve the problem of blockage caused by the high viscosity of slurry solid waste and easy adhesion when mixed with coal. At the same time, the system provided by the embodiment of the present invention adopts a closed transportation method, which can solve the problem of gas release from slurry solid waste polluting the environment.

[0092] Based on the system provided by the embodiment of the present invention, the coordinated disposal of slurry solid waste and desulfurization wastewater can be achieved. Liquid waste is used as a carrier for solid waste transportation, which solves the problem of solid waste transportation and liquid waste disposal at the same time. A pumping system is used to transport slurry materials, so that the slurry materials and coal are not in contact before entering the coal mill, which can solve the problem that the mixture of slurry materials and coal easily causes blockage of the transportation pipeline. A closed transportation method is used to solve the impact of gas release in slurry solid waste on the environment. In addition, the system architecture provided by the embodiment of the present invention is simple, and the investment and operation costs of the system are low.

[0093] The embodiment of the present invention also provides a method for the coordinated treatment of slurry solid waste and desulfurization wastewater. The method flow chart of the method can be Figure 4 As shown, the method provided by the embodiment of the present invention includes:

[0094] S301: stirring the waste material to be disposed to obtain a slurry material; the waste material is slurry solid waste or slurry solid waste and desulfurization wastewater;

[0095] In the method provided in the embodiment of the present invention, during the waste treatment process, the slurry solid waste and the desulfurization wastewater may be mixed to obtain a slurry material formed after the mixture. Specifically, the material mixing may be achieved through a storage tank or other material mixing device. The slurry solid waste may also be stirred separately and treated as a slurry material.

[0096] S302: transporting the slurry material to a powder making system by means of closed conveying, mixing the slurry material and a solid fuel by the powder making system to obtain a mixed material, and dry-grinding the mixed material to obtain a ground material;

[0097] In the method provided in the embodiment of the present invention, the slurry material can be transported to the pre-deployed milling system by pumping or other material conveying methods, and the material conveying method adopts a closed conveying method, that is, all kinds of pipes, containers and other objects in the conveying path are closed. At the same time, the solid fuel can be transported to the milling system through its corresponding material conveying pipeline. In the milling system, the slurry material and the solid fuel are mixed to obtain a mixed material, and the mixed material is dried, and the dried mixed material is ground to obtain a ground material.

[0098] S303: transporting the ground material to the boiler in a closed transport manner, so that the boiler burns the ground material as fuel.

[0099] In the method provided in the embodiment of the present invention, the ground material can be transported to the burner of the boiler by a closed conveying method, so that the ground material can be burned as boiler fuel, thereby realizing the incineration disposal of slurry solid waste and desulfurization wastewater.

[0100] Based on the method provided by the embodiment of the present invention, in the process of disposing slurry solid waste, the slurry solid waste to be disposed can be stirred, or the slurry solid waste and desulfurization wastewater can be mixed to obtain a slurry material; the slurry material and solid fuel are mixed through a pulverizing system to obtain a mixed material, and the mixed material is dried and ground to obtain a ground material; the ground material is transported to a boiler so that the boiler burns the ground material as fuel. Using the method provided by the embodiment of the present invention, in the process of disposing slurry solid waste, it can be first mixed with desulfurization wastewater to use the mixture as a slurry material, or the slurry solid waste can be used as a slurry material alone, and then the slurry solid waste or its mixture with desulfurization wastewater is mixed with solid fuel through a pulverizing system, and the pulverizing system is used to dry and grind, and finally incineration disposal is achieved. Before the material enters the pulverizing system, a mixture of slurry solid waste and solid fuel will not be formed, and the mixture does not need to be transported, which can avoid the material agglomeration phenomenon during the material transportation process, and can effectively avoid local accumulation or blockage of materials, which is conducive to ensuring the normal operation of the production system and improving the stability and safety of production. At the same time, it can be used to achieve the coordinated disposal of slurry solid waste and desulfurization wastewater, realize zero discharge and waste recycling of slurry solid waste and desulfurization wastewater, and simultaneously improve the utilization rate of slurry solid waste and desulfurization wastewater. In addition, the transportation of materials adopts a closed transportation method to avoid the release of odor from the materials affecting the external environment.

[0101] exist Figure 4 On the basis of the method shown, if the waste material is slurry solid waste, the method provided in the embodiment of the present invention further includes:

[0102] During the process of mixing the slurry material and the solid fuel, an auxiliary fuel is added for mixing.

[0103] In the method provided by the embodiment of the present invention, when the waste material to be disposed is only slurry solid waste (i.e., the slurry material is only slurry solid waste), when the slurry material and the solid fuel are mixed, an additional auxiliary fuel is also mixed, that is, the mixture of the slurry material, the solid fuel and the auxiliary fuel is used as a mixed material for subsequent treatment. The auxiliary fuel can be a high-calorie fuel.

[0104] Based on the method provided in the embodiment of the present invention, when the slurry material and the solid fuel are mixed, an auxiliary fuel may be further added to increase the calorific value of the ground material, which is beneficial to enhance the ignition of the material.

[0105] It should be noted that the disposal method adopted by the method for coordinated disposal of slurry solid waste and desulfurization wastewater provided in the embodiment of the present invention is similar to the disposal method implemented by the system for coordinated disposal of slurry solid waste and desulfurization wastewater provided in the previous embodiments. Therefore, the description of the method embodiment is relatively simple, and the implementation of the disposal method can refer to the description in the previous embodiments.

[0106] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.

[0107] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for the coordinated treatment of slurry solid waste and desulfurization wastewater, characterized in that: include: Storage tanks, pumping systems, milling systems and boilers; The discharge end of the storage tank is connected to the feed end of the pumping system; The pulverizing system is provided with a first feed end and a second feed end, the discharge end of the pumping system is connected to the first feed end of the pulverizing system, the second feed end of the pulverizing system is connected to the solid fuel conveying system, and the discharge end of the pulverizing system is connected to the burner of the boiler; In the system for the coordinated disposal of slurry solid waste and desulfurization wastewater, each conveying pipeline for conveying materials is a closed pipeline; The storage tank is used to receive the waste materials to be disposed, stir the waste materials to obtain slurry materials, and output the slurry materials to the pumping system; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater; The pumping system is used to transport the slurry material to the milling system; The pulverizing system is used to mix the slurry material and the solid fuel to obtain a mixed material, dry-grind the mixed material to obtain a ground material, and transport the ground material to the boiler so that the boiler burns the ground material as fuel.

2. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 1, characterized in that: A stirring device is arranged in the storage tank.

3. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 2 is characterized in that: An arch-breaking slide is also provided in the storage tank.

4. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 1, characterized in that: The pulverizing equipment in the pulverizing system is a coal mill.

5. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 1, characterized in that: The boiler is a coal-fired boiler, and the solid fuel is coal.

6. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 1, characterized in that: Also includes: Hot air heating system; The hot air heating system is arranged on the hot primary air duct of the powder making system; The hot air heating system is used to heat the hot primary air of the powder making system.

7. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 1, characterized in that: The smoke discharged from the boiler is used as a drying heat source for the pulverizing system.

8. The system for coordinated treatment of slurry solid waste and desulfurization wastewater according to claim 1, characterized in that: The second feed end in the pulverizing system is also connected to a delivery pipeline of an auxiliary fuel so as to mix the auxiliary fuel into the mixed material.

9. A method for co-disposal of slurry solid waste and desulfurization wastewater, characterized in that: include: Stirring the waste materials to be disposed of to obtain slurry materials; the waste materials are slurry solid waste or slurry solid waste and desulfurization wastewater; The slurry material is transported to a powder making system by means of closed conveying, the slurry material and a solid fuel are mixed by the powder making system to obtain a mixed material, and the mixed material is dry-ground to obtain a ground material; The ground material is transported to the boiler in a closed transport manner, so that the boiler burns the ground material as fuel.

10. The method for coordinated disposal of slurry solid waste and desulfurization wastewater according to claim 9, characterized in that: If the waste material is slurry-like solid waste, the method further comprises: During the process of mixing the slurry material and the solid fuel, an auxiliary fuel is added for mixing.

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