Deacidification system and method for solid waste treatment for realizing continuous production

Abstract

The invention discloses a deacidification system and method for solid waste disposal for realizing continuous production, an outlet of a bucket elevator is communicated with an inlet of a reaction tank through a weighing feeder, an outlet of a water tank is communicated with the inlet of the reaction tank through a water supply pump in sequence, an outlet of the reaction tank is divided into two paths, wherein one path is communicated with the inlet of the storage tank through a fourth electric ball valve, and the other path is communicated with the inlet of the reaction tank through a third electric ball valve; an outlet of the storage tank is divided into two paths, one path is communicated with an inlet of the storage tank through a second pressure measuring device, a second check valve and a sixth electric ball valve, the other path is communicated with the atomization device through a seventh electric ball valve, and the system and the method have the advantages of being simple in process, good in flexibility, even and stable in deacidification agent, high in utilization rate and low in cost.

Description

Technical Field

[0001] The present invention belongs to the field of solid waste disposal, and relates to an acid removal system and method for solid waste disposal that realizes continuous production. 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 such as overspray and low utilization rate of deacidification agent in the removal process of acid gas, and the deacidification equipment is large and inflexible. Research on the acid gas removal process has found that there are problems such as large changes in acid gas concentration, low activity of deacidification agent, and unstable concentration of deacidification agent. In view of these problems, it is urgent to overcome the shortcomings of the above-mentioned prior art and propose a deacidification system and method with simple process, good flexibility, uniform and stable deacidification agent, high utilization rate, and low cost, so as to help achieve proper treatment of solid waste, reduce system corrosion, and reduce environmental pollution. 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 acid removal system and method for solid waste disposal that realizes continuous production. The system and method have the characteristics of simple process, good flexibility, uniform and stable deacidifying agent, high utilization rate and low cost.

[0006] To achieve the above-mentioned purpose, the present invention discloses an acid removal system for solid waste disposal that realizes continuous production, including a bucket elevator, a reaction tank, a water tank, a storage tank and an atomizing device;

[0007] The outlet of the bucket elevator is connected to the inlet of the reaction tank via the weighing feeder, and the outlet of the water tank is connected to the inlet of the reaction tank via the water supply pump in turn. The outlet of the reaction tank is divided into two routes, one of which is connected to the inlet of the storage tank via the fourth electric ball valve, and the other is connected to the inlet of the reaction tank via the third electric ball valve;

[0008] The outlet of the storage tank is divided into two routes, one of which is connected to the inlet of the storage tank through the second pressure measuring device, the second check valve and the sixth electric ball valve, and the other is connected to the atomizing device through the seventh electric ball valve.

[0009] Furthermore, the outlet of the reaction tank is divided into two paths after passing through the second electric ball valve, the first mud pump, the first pressure measuring device and the first check valve in sequence.

[0010] Furthermore, the outlet of the storage tank is divided into two paths after passing through the fifth electric ball valve and the second mud pump in sequence.

[0011] Furthermore, the outlet of the bucket elevator is connected to the inlet of the reaction tank via the quicklime storage bin, the hydraulic plug door and the weighing feeder in sequence.

[0012] Furthermore, the outlet of the water tank is connected to the inlet of the reaction tank via a water supply pump, a flow meter and a first electric ball valve in sequence.

[0013] Furthermore, it also includes a sewage pipe, the first overflow hole of the reaction tank is connected to the sewage pipe, and the first sewage hole at the bottom of the reaction tank is connected to the sewage pipe via a first manual stop valve.

[0014] Furthermore, the second overflow hole of the storage tank is connected to the sewage pipe, and the second sewage hole at the bottom of the storage tank is connected to the sewage pipe via a second manual stop valve.

[0015] Furthermore, the reaction tank is provided with a first stirring device, a first air permeable pipe, a first temperature measuring device and a first magnetic flap level gauge.

[0016] Furthermore, the storage tank is provided with a second stirring device, a second air permeable pipe, a second low-temperature device and a second magnetic flap liquid level gauge.

[0017] The present invention discloses a deacidification method for solid waste disposal that realizes continuous production, comprising the following steps:

[0018] 1) Calculate the amount of quicklime and water required to prepare the lime slurry according to the type of solid waste to be treated, add 1 / 2 of the required water into the reaction tank, and start the first stirring device;

[0019] 2) The quicklime is fed into the weighing feeder through a bucket elevator and then fed into the reaction tank for weighing, and 1 / 2 of the required amount of water is added;

[0020] 3) According to the reaction conditions in the reaction tank, the third electric ball valve, the second electric ball valve and the first mud pump are selectively opened to allow the solution in the reaction tank to circulate internally to promote the dissolution of quicklime;

[0021] 4) After the reaction is complete, the lime milk suspension in the reaction tank is sent to the storage tank. Before use, the sixth electric ball valve, the fifth electric ball valve and the second mud pump are selectively opened to allow the solution in the storage tank to circulate internally.

[0022] The present invention has the following beneficial effects:

[0023] The deacidification system and method for solid waste disposal that realizes continuous production described in the present invention calculates the amounts of quicklime and water required for preparing lime slurry according to the different types of solid waste to be disposed of during specific operation, adds 1 / 2 of the required water into the reaction tank, turns on the first stirring device, feeds the quicklime into the weighing feeder through a bucket elevator for weighing, and then feeds it into the reaction tank, adds 1 / 2 of the required water, utilizes the reaction of CaO+H2O→Ca(OH)2, and precisely controls the amounts of water and calcium oxide to configure the total amount and concentration of lime milk required for the disposal of different solid wastes, and simultaneously provides a stirring device to achieve the best deacidification effect, while also being able to control the cost to a minimum, and has the advantages of simple process, good flexibility, uniform and stable deacidifying agent, high utilization rate, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1 It is a structural diagram of the present invention.

[0026] Among them, 1 is a water tank, 2 is a water supply pump, 3 is a flow meter, 4 is a first electric ball valve, 5 is a bucket elevator, 6 is a quicklime storage bin, 7 is a hydraulic plug door, 8 is a weighing feeder, 9 is a reaction tank, 10 is a first stirring device, 11 is a first temperature measuring device, 12 is a first magnetic flap level gauge, 13 is a first air vent, 14 is a first overflow hole, 15 is a first sewage hole, 16 is a first manual stop valve, 17 is a second electric ball valve, 18 is a first mud pump, 19 is a first check valve, 20 is a first Three electric ball valves, 21 is the first pressure measuring device, 22 is the fourth electric ball valve, 23 is the storage tank, 24 is the second stirring device, 25 is the second temperature measuring device, 26 is the second magnetic flap level gauge, 27 is the second air vent, 28 is the second overflow hole, 29 is the second sewage hole, 30 is the second manual stop valve, 31 is the fifth electric ball valve, 32 is the second mud pump, 33 is the second check valve, 34 is the sixth electric ball valve, 35 is the second pressure measuring device, 36 is the seventh electric ball valve, and 37 is the atomization device. DETAILED DESCRIPTION

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Embodiment 1

[0036] refer to Figure 1 The acid removal system for solid waste disposal realizing continuous production of the present invention comprises a water tank 1, a water supply pump 2, a flow meter 3, a first electric ball valve 4, a bucket elevator 5, a quicklime storage bin 6, a hydraulic plug door 7, a weighing feeder 8, a reaction tank 9, a first stirring device 10, a first temperature measuring device 11, a first magnetic flap level gauge 12, a first air permeable pipe 13, a first overflow hole 14, a first sewage hole 15, a first manual stop valve 16, a second electric ball valve 17, a first mud pump 18, a first A check valve 19, a third electric ball valve 20, a first pressure measuring device 21, a fourth electric ball valve 22, a storage tank 23, a second stirring device 24, a second temperature measuring device 25, a second magnetic flap level gauge 26, a second air vent 27, a second overflow hole 28, a second sewage hole 29, a second manual stop valve 30, a fifth electric ball valve 31, a second mud pump 32, a second check valve 33, a sixth electric ball valve 34, a second pressure measuring device 35, a seventh electric ball valve 36 and an atomizing device 37;

[0037] The outlet of the bucket elevator 5 is connected to the inlet of the reaction tank 9 via the quicklime storage bin 6, the hydraulic plug gate 7 and the weighing feeder 8 in sequence. The outlet of the water tank 1 is connected to the inlet of the reaction tank 9 via the water supply pump 2, the flow meter 3 and the first electric ball valve 4 in sequence. The outlet of the reaction tank 9 is divided into two paths after passing through the second electric ball valve 17, the first mud pump 18, the first pressure measuring device 21 and the first check valve 19 in sequence. One path is connected to the inlet of the storage tank 23 via the fourth electric ball valve 22, and the other path is connected to the inlet of the reaction tank 9 via the third electric ball valve 20.

[0038] The outlet of the storage tank 23 is divided into two paths after passing through the fifth electric ball valve 31 and the second mud pump 32 in sequence. One path is connected to the inlet of the storage tank 23 through the second pressure measuring device 35, the second check valve 33 and the sixth electric ball valve 34, and the other path is connected to the atomization device 37 through the seventh electric ball valve 36.

[0039] The first overflow hole 14 of the reaction tank 9 is connected to the sewage pipe, the first sewage hole 15 at the bottom of the reaction tank 9 is connected to the sewage pipe via the first manual stop valve 16, the second overflow hole 28 of the storage tank 23 is connected to the sewage pipe, and the second sewage hole 29 at the bottom of the storage tank 23 is connected to the sewage pipe via the second manual stop valve 30.

[0040] The reaction tank 9 is provided with a first stirring device 10, a first air permeable pipe 13, a first temperature measuring device 11 and a first magnetic flap level gauge 12, and the storage tank 23 is provided with a second stirring device 24, a second air permeable pipe 27, a second low temperature device and a second magnetic flap level gauge 26.

[0041] Embodiment 2

[0042] refer to Figure 1The present embodiment discloses a deacidification method for solid waste disposal that realizes continuous production. The deacidification method for solid waste disposal that realizes continuous production is realized based on the deacidification system for solid waste disposal that realizes continuous production. The deacidification system for solid waste disposal that realizes continuous production includes a water tank 1, a water supply pump 2, a flow meter 3, a first electric ball valve 4, a bucket elevator 5, a quicklime storage bin 6, a hydraulic plug-in door 7, a weighing feeder 8, a reaction tank 9, a first stirring device 10, a first temperature measuring device 11, a first magnetic flap level gauge 12, a first air permeable pipe 13, a first overflow hole 14, a first A drain hole 15, a first manual stop valve 16, a second electric ball valve 17, a first mud pump 18, a first check valve 19, a third electric ball valve 20, a first pressure measuring device 21, a fourth electric ball valve 22, a storage tank 23, a second stirring device 24, a second temperature measuring device 25, a second magnetic flap level gauge 26, a second air vent 27, a second overflow hole 28, a second drain hole 29, a second manual stop valve 30, a fifth electric ball valve 31, a second mud pump 32, a second check valve 33, a sixth electric ball valve 34, a second pressure measuring device 35, a seventh electric ball valve 36 and an atomizing device 37;

[0043] Specifically, the acid removal method for solid waste disposal that realizes continuous production comprises the following steps:

[0044] 1) According to the different types of solid waste to be disposed, calculate the amount of quicklime and water required for the lime slurry, open the first electric ball valve 4 and then open the water supply pump 2, add 1 / 2 of the required water into the reaction tank 9, turn on the first stirring device 10, and adjust the speed of the first stirring device 10 (about 80-120r / min). The function of the first stirring device 10 is to 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.

[0045] 2) Quicklime is fed into the quicklime storage bin 6 through the bucket elevator 5, the weighing feeder 8 is opened, and then the hydraulic plug door 7 is opened to feed an appropriate amount of quicklime (CaO) into the reaction tank 9, and then 1 / 2 of the required amount of water is added. By accurately proportioning the amount of water and the amount of quicklime, the best 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 of by the solid waste disposal device, the cost can be controlled to the minimum while achieving complete deacidification by adjusting the amount of material and water.

[0046] 3) According to the reaction conditions in the reaction tank 9, the third electric ball valve 20, the second electric ball valve 17 and the first mud pump 18 can be selectively opened to allow the solution in the reaction tank 9 to circulate internally to promote the dissolution of quicklime.

[0047] 4) After the reaction is complete, close the third electric ball valve 20, open the second stirring device 24, open the fourth electric ball valve 22, the second electric ball valve 17 and the first mud pump 18, so that the lime milk suspension enters the storage tank 23. Before the acid removal system is used, the sixth electric ball valve 34, the fifth electric ball valve 31 and the second mud pump 32 can be selectively opened to allow the solution in the storage tank 23 to circulate internally to avoid solid precipitation in the dissolved lime milk.

[0048] 5) Close the sixth electric ball valve 34, open the seventh electric ball valve 36, and pump the lime milk to the atomizing device 37 through the second mud pump 32. The atomizing device 37 disperses it into tiny droplets or particles, and then sprays it into the solid waste disposal device to remove the HCl, HF and SO2 gases generated during the solid waste disposal process, and generate highly stable calcium chloride, calcium fluoride and calcium sulfate. Among them, whether the system is put into operation and the size of the operation amount are determined according to the physical and chemical characteristics of the solid waste and the amount of acid gas generated during the disposal process.

[0049] In addition, the reaction tank 9 is provided with a first overflow hole 14 and a first sewage hole 15, and the storage tank 23 is provided with a second overflow hole 28 and a second sewage hole 29. After opening the first manual stop valve 16 and the second manual stop valve 30, the liquid exceeding the appropriate liquid level and the liquid for cleaning and sewage discharge can be sent to a nearby sewage pool through a pipeline.

[0050] The reaction tank 9 is provided with a first air permeable pipe 13, and the storage tank 23 is provided with a second air permeable pipe 27, which can maintain the pressure stability in the reaction tank 9 and the storage tank 23. At the same time, the reaction tank 9 and the storage tank 23 are respectively provided with a first temperature measuring device 11 and a second temperature measuring device 25, which can judge whether the reaction is completed according to the temperature feedback, thereby accelerating the whole process.

[0051] The present invention has the following characteristics:

[0052] 1. The present invention utilizes the reaction of CaO+H2O→Ca(OH)2 and accurately controls the amount of water and calcium oxide to configure the total amount and concentration of lime milk required for different solid waste disposal, thereby achieving the optimal deacidification effect and also controlling the cost to the minimum.

[0053] 2. The reaction tank 9 and the storage tank 23 are separately provided to overcome the problem that a complete reaction takes time, so that the entire deacidification system can achieve continuous and stable operation, and deacidification can be carried out uninterruptedly during solid waste disposal.

[0054] 3. The internal circulation and stirring device can increase the contact area between calcium oxide and water and accelerate the reaction speed. 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.

[0055] 4. An atomizing device 37 is provided to disperse the lime milk slurry delivered from the mud pump into tiny droplets or particles, which can increase the contact area with acidic gases such as HCl, HF and SO2 after being sprayed into the solid waste disposal device, so as to generate stable substances such as calcium chloride, calcium fluoride and calcium sulfate faster and more completely.

[0056] 5. The system is simple and independent of the solid waste disposal device. Whether the system should be put into operation and the amount of operation can be determined based on the physical and chemical properties of the solid waste and the amount of acid gas generated during the disposal process.

[0057] 6. In combination with appropriate solid waste disposal equipment, this system does not generate additional waste.

[0058] 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 are indicated by the following claims.

[0059] 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.

[0060] 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. A deacidification system for solid waste disposal that realizes continuous production, characterized in that: It comprises a bucket elevator (5), a reaction tank (9), a water tank (1), a storage tank (23) and an atomizing device (37); The outlet of the bucket elevator (5) is connected to the inlet of the reaction tank (9) via the weighing feeder (8), the outlet of the water tank (1) is connected to the inlet of the reaction tank (9) via the water supply pump (2), and the outlet of the reaction tank (9) is divided into two paths, one of which is connected to the inlet of the storage tank (23) via the fourth electric ball valve (22), and the other is connected to the inlet of the reaction tank (9) via the third electric ball valve (20); The outlet of the storage tank (23) is divided into two paths, one of which is connected to the inlet of the storage tank (23) via the second pressure measuring device (35), the second check valve (33) and the sixth electric ball valve (34), and the other is connected to the atomizing device (37) via the seventh electric ball valve (36).

2. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The outlet of the reaction tank (9) is divided into two paths after passing through the second electric ball valve (17), the first mud pump (18), the first pressure measuring device (21) and the first check valve (19) in sequence.

3. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The outlet of the storage tank (23) is divided into two paths after passing through the fifth electric ball valve (31) and the second mud pump (32) in sequence.

4. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The outlet of the bucket elevator (5) is connected to the inlet of the reaction tank (9) through the quicklime storage bin (6), the hydraulic plug-in door (7) and the weighing feeder (8) in sequence.

5. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The outlet of the water tank (1) is connected to the inlet of the reaction tank (9) via the water supply pump (2), the flow meter (3) and the first electric ball valve (4) in sequence.

6. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: It also includes a sewage discharge pipeline, wherein the first overflow hole (14) of the reaction tank (9) is connected to the sewage discharge pipeline, and the first sewage discharge hole (15) at the bottom of the reaction tank (9) is connected to the sewage discharge pipeline via a first manual stop valve (16).

7. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The second overflow hole (28) of the storage tank (23) is connected to the sewage pipe, and the second sewage hole (29) at the bottom of the storage tank (23) is connected to the sewage pipe via a second manual stop valve (30).

8. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The reaction tank (9) is provided with a first stirring device (10), a first air permeable pipe (13), a first temperature measuring device (11) and a first magnetic flap liquid level gauge (12).

9. The acid removal system for solid waste disposal realizing continuous production according to claim 1, characterized in that: The storage tank (23) is provided with a second stirring device (24), a second air permeable pipe (27), a second low-temperature device and a second magnetic flap liquid level gauge (26).

10. A method for deacidification for solid waste disposal that realizes continuous production, characterized in that: The acid removal system for solid waste disposal realizing continuous production according to any one of claims 1 to 9 comprises the following steps: 1) Calculate the amount of quicklime and water required to prepare lime slurry according to the type of solid waste to be treated, add 1 / 2 of the required amount of water into the reaction tank (9), and start the first stirring device (10); 2) The quicklime is fed into a weighing feeder (8) through a bucket elevator (5) and then fed into a reaction tank (9) after being weighed, and 1 / 2 of the required amount of water is added; 3) According to the reaction conditions in the reaction tank (9), the third electric ball valve (20), the second electric ball valve (17) and the first mud pump (18) are selectively opened to allow the solution in the reaction tank (9) to circulate internally, thereby promoting the dissolution of quicklime; 4) After the reaction is complete, the lime milk suspension in the reaction tank (9) is sent to the storage tank (23). Before use, the sixth electric ball valve (34), the fifth electric ball valve (31) and the second mud pump (32) are selectively opened to allow the solution in the storage tank (23) to circulate internally.

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