Alkaline deacidification system and method suitable for solid waste treatment

Abstract

The invention discloses an alkaline deacidification system and method suitable for solid waste disposal, an outlet of a quicklime storage bin is connected with an inlet of a weighing and feeding system, an outlet of the weighing and feeding system is connected with a material inlet of a reaction tank, an outlet of an automatic water replenishing system is connected with a solution inlet of the reaction tank, and an outlet of the automatic water replenishing system is connected with an outlet of the reaction tank. An outlet of the cooling water tank is connected with a cooling water inlet of the stirring device, and a cooling water outlet of the stirring device is connected with an inlet of the cooling water tank; and a turbid liquid outlet of the reaction tank is connected with a deacidification solution inlet of the solid waste treatment device through the atomization device. The system and the method can solve the problems of large acid gas concentration change, low deacidification agent activity and unstable deacidification agent concentration in an acid gas removal process.

Description

Technical Field

[0001] The invention belongs to the field of solid waste disposal and relates to an alkaline deacidification system and method suitable for solid waste disposal. Background Art

[0002] Comprehensive utilization of solid waste refers to the process of reducing, recycling and harmlessly treating waste by physical, chemical or biological means. In recent years, with the acceleration of urbanization and the sustained development of the economy, the amount of solid waste generated has continued to increase, which has promoted the development of comprehensive waste utilization technologies and facilities. In terms of technology, some emerging technologies have been developed in recent years, such as high-temperature treatment technologies such as gasification and pyrolysis, which can effectively treat various types of solid waste and reduce environmental pollution. At the same time, waste sorting and resource recovery systems are also constantly upgrading, which has improved the efficiency of waste sorting and treatment. In terms of facilities, many cities and regions have established complete waste treatment and resource recovery facilities, such as garbage sorting centers, waste treatment plants and recycling centers.

[0003] However, there are many types of waste, and most solid wastes have high contents of Cl, S and other elements. If incineration is used, a large amount of HCl and SO2 gas will be produced during the process, which will cause serious corrosion to subsequent equipment and pipelines, affecting the safety of the original system operation. What's more, if these acidic gases are directly discharged into the atmosphere without treatment, they will have a serious impact on the environment and human health.

[0004] At present, there are common problems in the acid gas removal process, such as overspray and low utilization rate of deacidification agent, and the deacidification equipment is large and inflexible. Research on the acid gas removal process found that there are problems such as large changes in acid gas concentration, low activity of deacidification agent, and unstable deacidification agent concentration. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an alkaline deacidification system and method suitable for solid waste disposal. The system and method can solve the problems of large changes in acid gas concentration, low deacidification agent activity and unstable deacidification agent concentration in the acid gas removal process.

[0006] To achieve the above object, the present invention discloses an alkaline deacidification system suitable for solid waste disposal, comprising a quicklime storage bin, a weighing and feeding system, a reaction tank, an automatic water replenishment system, a cooling water tank, a stirring device and a solid waste disposal device;

[0007] The outlet of the quicklime storage bin is connected to the inlet of the weighing and feeding system, the outlet of the weighing and feeding system is connected to the material inlet of the reaction tank, the outlet of the automatic water replenishment system is connected to the solution inlet of the reaction tank, the outlet of the cooling water tank is connected to the cooling water inlet of the stirring device, and the cooling water outlet of the stirring device is connected to the inlet of the cooling water tank; the suspension outlet of the reaction tank is connected to the deacidification solution inlet of the solid waste disposal device through the atomization device.

[0008] Furthermore, the outlet of the weighing and feeding system is connected to the material inlet of the reaction tank via a feed valve.

[0009] Furthermore, the outlet of the automatic water replenishment system is connected to the solution inlet of the reaction tank via a weighing water tank and a water supply pump.

[0010] Furthermore, a water inlet valve and a flow meter are provided between the outlet of the water supply pump and the solution inlet of the reaction tank.

[0011] Furthermore, a stirring device, a temperature measuring device and a discharge valve are arranged in the reaction tank.

[0012] Furthermore, the outlet of the cooling water tank is connected to the cooling water inlet of the stirring device via a circulating water pump.

[0013] Furthermore, the suspension outlet of the reaction tank is connected to the inlet of the atomization device via a mud pump.

[0014] Furthermore, a discharge valve is provided between the suspension outlet of the reaction tank and the inlet of the mud pump.

[0015] The present invention discloses an alkaline deacidification method suitable for solid waste disposal, comprising the following steps:

[0016] 1) Turn on the automatic water replenishment system, add water to the weighing water tank and the cooling water tank, turn on the circulating water pump, then turn on the stirring device, and adjust the speed of the stirring device to the preset speed;

[0017] 2) Open the water inlet valve, turn on the water supply pump, and control the amount of water entering the reaction tank through the flow meter and weighing water tank;

[0018] 3) Open the feed valve, and the quicklime in the quicklime storage bin enters the reaction tank;

[0019] 4) After the lime milk reaches a uniform state, open the discharge valve, turn on the mud pump, and send the lime milk to the atomization device through the mud pump, and then disperse it into tiny droplets or particles through the atomization device, and then spray it into the solid waste disposal device for solid waste disposal.

[0020] The present invention has the following beneficial effects:

[0021] The alkaline deacidification system and method suitable for solid waste disposal described in the present invention, in specific operation, utilizes the reaction of CaO+H2O→Ca(OH)2, and can configure the total amount and concentration of lime milk required for different solid waste disposal by accurately controlling the amount of water and calcium oxide, so as to achieve the best deacidification effect, and also can control the cost to the minimum. In addition, the present invention can increase the contact area between calcium oxide and water and accelerate the reaction speed by setting a stirring device, and at the same time, since the solubility of calcium hydroxide generated by the reaction is not high, the solid-liquid mixture (lime milk) after the reaction can be kept in a uniform suspension state. In addition, the present invention can disperse the lime milk slurry into tiny droplets or particles by setting an atomizing device, and after spraying into the solid waste disposal device, the contact area with acidic gases such as HCl, HF and SO2 can be increased, so that stable substances such as calcium chloride, calcium fluoride and calcium sulfate can be generated faster and more completely, thereby being able to solve the problems of large changes in acidic gas concentration, low activity of deacidifying agent and unstable concentration of deacidifying agent in the acidic gas removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural diagram of the present invention.

[0024] Among them, 1 is the quicklime storage silo, 2 is the weighing feeding system, 3 is the feed valve, 4 is the reaction tank, 5 is the stirring device, 6 is the temperature measuring device, 7 is the water inlet valve, 8 is the flow meter, 9 is the water supply pump, 10 is the weighing water tank, 11 is the cooling water tank, 12 is the circulating water pump, 13 is the discharge valve, 14 is the mud pump, 15 is the atomizing device, 16 is the automatic water replenishing system, 17 is the safety valve, and 18 is the solid waste disposal device. DETAILED DESCRIPTION

[0025] 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 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.

[0026] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0028] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0029] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0030] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0033] Embodiment 1

[0034] refer to Figure 1 The alkaline deacidification system suitable for solid waste disposal of the present invention includes a quicklime storage bin 1, a weighing and feeding system 2, a reaction tank 4, an automatic water replenishment system 16, a cooling water tank 11, a stirring device 5 and a solid waste disposal device 18; the outlet of the quicklime storage bin 1 is connected to the inlet of the weighing and feeding system 2, the outlet of the weighing and feeding system 2 is connected to the material inlet of the reaction tank 4, the outlet of the automatic water replenishment system 16 is connected to the solution inlet of the reaction tank 4, the outlet of the cooling water tank 11 is connected to the cooling water inlet of the stirring device 5, and the cooling water outlet of the stirring device 5 is connected to the inlet of the cooling water tank 11; the suspension outlet of the reaction tank 4 is connected to the deacidification solution inlet of the solid waste disposal device 18 via the atomizing device 15.

[0035] The invention has the characteristics of simple process, good flexibility, uniform and stable deacidifying agent, high utilization rate and low cost, thereby helping to achieve proper treatment of solid waste, alleviate system corrosion and reduce environmental pollution.

[0036] Embodiment 2

[0037] refer to Figure 1 The alkaline deacidification system suitable for solid waste disposal of the present invention comprises a quicklime storage bin 1, a weighing and feeding system 2, a feed valve 3, a reaction tank 4, a stirring device 5, a temperature measuring device 6, a water inlet valve 7, a flow meter 8, a water supply pump 9, a weighing water tank 10, a cooling water tank 11, a circulating water pump 12, a discharge valve 13, a mud pump 14, an atomizing device 15, an automatic water replenishment system 16, a safety valve 17 and a solid waste disposal device 18;

[0038] The outlet of the quicklime storage bin 1 is connected to the inlet of the weighing and feeding system 2, the outlet of the weighing and feeding system 2 is connected to the material inlet of the reaction tank 4 through the feed valve 3, the outlet of the automatic water replenishment system 16 is connected to the inlet of the weighing water tank 10, the outlet of the weighing water tank 10 is connected to the inlet of the water supply pump 9, the outlet of the water supply pump 9 is connected to the solution inlet of the reaction tank 4, and a water inlet valve 7 and a flow meter 8 are arranged between the outlet of the water supply pump 9 and the solution inlet of the reaction tank 4; a stirring device 5, a temperature measuring device 6 and a discharge valve 1 are arranged in the reaction tank 4 3; the outlet of the cooling water tank 11 is connected to the inlet of the circulating water pump 12, the outlet of the circulating water pump 12 is connected to the cooling water inlet of the stirring device 5, and the cooling water outlet of the stirring device 5 is connected to the inlet of the cooling water tank 11; the suspension outlet of the reaction tank 4 is connected to the inlet of the mud pump 14, a discharge valve 13 is provided between the suspension outlet of the reaction tank 4 and the inlet of the mud pump 14, the outlet of the mud pump 14 is connected to the inlet of the atomizing device 15, and the outlet of the atomizing device 15 is connected to the deacidification solution inlet of the solid waste disposal device 18.

[0039] The alkaline deacidification method suitable for solid waste disposal of the present invention comprises the following steps:

[0040] 1) Turn on the automatic water replenishment system 16, add water to the weighing water tank 10 and the cooling water tank 11, turn on the circulating water pump 12, and then turn on the stirring device 5, and adjust the speed of the stirring device 5 to 80-120 r / min. The stirring device 5 can increase the contact area and accelerate the reaction speed. At the same time, since the solubility of calcium hydroxide is not high, the solid-liquid mixture (lime milk) after the reaction can be kept in a uniform suspension state.

[0041] 2) Open the water inlet valve 7, turn on the water supply pump 9, and control the amount of water entering the reaction tank 4 through the flow meter 8 and the weighing water tank 10.

[0042] 3) Open the feed valve 3, and the quicklime (CaO) in the quicklime storage bin 1 is weighed by the weighing feeding system 2 and then enters the reaction tank 4. By accurately proportioning the amount of water and the amount of quicklime, the optimal concentration of lime milk can be configured to achieve the best deacidification effect. In addition, according to the different sulfur and chlorine contents of the solid waste disposed by the solid waste disposal device 18, the amount of material and water can be adjusted to achieve complete deacidification while also minimizing the cost.

[0043] 4) After the lime milk reaches a uniform state, the discharge valve 13 is opened, the mud pump 14 is turned on, and the lime milk is sent to the atomizing device 15 through the mud pump 14, and then dispersed into tiny droplets or particles through the atomizing device 15, and then sprayed into the solid waste disposal device 18 for solid waste disposal, and the gases such as HCl, HF and SO2 generated in the solid waste disposal process are removed to generate stable substances such as calcium chloride, calcium fluoride and calcium sulfate. Among them, whether the system is put into operation and the amount of operation are determined according to the physical and chemical characteristics of the solid waste and the amount of acid gas generated in the disposal process.

[0044] 5) The reaction tank 4 is provided with a temperature measuring device 6 and a safety valve 17. Since the reaction process of calcium oxide and water releases heat, the pressure in the reaction tank 4 may increase. When a safety hazard occurs, the pressure is released through the safety valve 17 to eliminate the hazard. At the same time, it is also possible to judge whether the reaction is completed based on the feedback of the temperature measuring device 6, thereby accelerating the entire process.

[0045] The present invention has the following characteristics:

[0046] The present invention utilizes the reaction of CaO+H2O→Ca(OH)2 and precisely controls the amount of water and calcium oxide to configure the total amount and concentration of lime milk required for different solid waste disposals, thereby achieving the optimal deacidification effect and also controlling the cost to the lowest.

[0047] By providing the stirring device 5, the contact area between calcium oxide and water can be increased and the reaction speed can be accelerated. At the same time, since the solubility of calcium hydroxide generated by the reaction is not high, the solid-liquid mixture (lime milk) after the reaction can be kept in a uniform suspension state.

[0048] By providing an atomizing device 15, the lime milk slurry delivered from the mud pump 14 can be dispersed into tiny droplets or particles. After being sprayed into the solid waste disposal device 18, the contact area with acidic gases such as HCl, HF and SO2 can be increased, so that stable substances such as calcium chloride, calcium fluoride and calcium sulfate can be generated faster and more completely.

[0049] The system of the present invention is simple, independent of the solid waste disposal device 18, and can determine whether the system is put into operation and the amount of operation based on the physical and chemical properties of the solid waste and the amount of acid gas generated during the disposal process.

[0050] The present invention cooperates with a suitable solid waste disposal device 18, and the present invention does not generate additional waste.

[0051] Embodiment 3

[0052] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the alkaline deacidification method applicable to solid waste disposal are implemented. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc. The processor, the network interface, and the memory are interconnected through an internal bus. The internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard structure bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the program may include a program code, and the program code includes computer operation instructions. The memory may include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0053] Embodiment 4

[0054] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the alkaline deacidification method suitable for solid waste disposal are implemented. Specifically, the computer-readable storage medium includes, but is not limited to, for example, a volatile memory and / or a non-volatile memory. The volatile memory may include a random access memory (RAM) and / or a cache memory, etc. The non-volatile memory may include a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.

[0055] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0056] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0057] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0058] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0059] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention is indicated by the following claims.

[0060] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An alkaline deacidification system suitable for solid waste disposal, characterized in that: It comprises a quicklime storage bin (1), a weighing and feeding system (2), a reaction tank (4), an automatic water supply system (16), a cooling water tank (11), a stirring device (5) and a solid waste disposal device (18); The outlet of the quicklime storage bin (1) is connected to the inlet of the weighing and feeding system (2), the outlet of the weighing and feeding system (2) is connected to the material inlet of the reaction tank (4), the outlet of the automatic water replenishment system (16) is connected to the solution inlet of the reaction tank (4), the outlet of the cooling water tank (11) is connected to the cooling water inlet of the stirring device (5), and the cooling water outlet of the stirring device (5) is connected to the inlet of the cooling water tank (11); the suspension outlet of the reaction tank (4) is connected to the deacidification solution inlet of the solid waste disposal device (18) via the atomizing device (15).

2. The alkaline deacidification system suitable for solid waste disposal according to claim 1, characterized in that: The outlet of the weighing feeding system (2) is connected to the material inlet of the reaction tank (4) via the feed valve (3).

3. The alkaline deacidification system suitable for solid waste disposal according to claim 1, characterized in that: The outlet of the automatic water replenishment system (16) is connected to the solution inlet of the reaction tank (4) via a weighing water tank (10) and a water supply pump (9).

4. The alkaline deacidification system suitable for solid waste disposal according to claim 3, characterized in that: A water inlet valve (7) and a flow meter (8) are provided between the outlet of the water supply pump (9) and the solution inlet of the reaction tank (4).

5. The alkaline deacidification system suitable for solid waste disposal according to claim 1, characterized in that: A stirring device (5), a temperature measuring device (6) and a discharge valve (13) are arranged in the reaction tank (4).

6. The alkaline deacidification system suitable for solid waste disposal according to claim 1, characterized in that: The outlet of the cooling water tank (11) is connected to the cooling water inlet of the stirring device (5) via a circulating water pump (12).

7. The alkaline deacidification system suitable for solid waste disposal according to claim 1, characterized in that: The suspension outlet of the reaction tank (4) is connected to the inlet of the atomization device (15) via a mud pump (14).

8. The alkaline deacidification system suitable for solid waste disposal according to claim 1, characterized in that: A discharge valve (13) is provided between the suspension outlet of the reaction tank (4) and the inlet of the mud pump (14).

9. An alkaline deacidification method suitable for solid waste disposal, characterized in that: The alkaline deacidification system suitable for solid waste disposal according to claim 1 comprises the following steps: 1) turning on the automatic water replenishment system (16), adding water to the weighing water tank (10) and the cooling water tank (11), turning on the circulating water pump (12), and then turning on the stirring device (5), and adjusting the speed of the stirring device (5) to a preset speed; 2) Open the water inlet valve (7), turn on the water supply pump (9), and control the amount of water entering the reaction tank (4) through the flow meter (8) and the weighing water tank (10); 3) opening the feed valve (3), and the quicklime in the quicklime storage bin (1) enters the reaction tank (4); 4) After the lime milk reaches a uniform state, the discharge valve (13) is opened, the mud pump (14) is turned on, and the lime milk is sent to the atomizing device (15) through the mud pump (14), and then dispersed into tiny droplets or particles through the atomizing device (15), and then sprayed into the solid waste disposal device (18) for solid waste disposal.

10. The alkaline deacidification method suitable for solid waste disposal according to claim 9, characterized in that: A stirring device (5), a temperature measuring device (6) and a discharge valve (13) are arranged in the reaction tank (4).

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