Preparation device of compound furnace shutdown protective agent

Abstract

The utility model provides a preparation device of a compound furnace shutdown protective agent, and belongs to the field of thermal power plant thermal equipment maintenance. The preparation device of the compound furnace shutdown protective agent comprises a grinding machine, a material pump, an alkyl glycoside solution pipeline, a mixing and stirring barrel and a storage tank. The preparation device of the compound furnace shutdown protective agent is reasonable in structure, and the prepared compound furnace shutdown protective agent taking octadecylamine as a main component is good in flowability, not easy to layer and stable in performance by utilizing the unique design in the preparation device and the excellent solubility of the alkyl glycoside surfactant. According to the preparation device of the compound furnace shutdown protective agent, the proportion of the added alkyl glycoside is small, but the dissolving property of the alkyl glycoside to octadecylamine is good, and the alkyl glycoside has a certain corrosion inhibition effect on metal.

Description

Technical Field

[0001] The utility model belongs to the field of thermal equipment maintenance in thermal power plants, and in particular relates to a preparation device for a composite shutdown protective agent. Background Art

[0002] During the shutdown process of thermal power plant thermal equipment, octadecylamine is often added to the pipeline system as a shutdown protective agent to form a layer of hydrophobic film-forming amine under high temperature and high pressure, thereby slowing down the corrosion rate of the inner surface of the unit. Octadecylamine is a white waxy organic substance that is insoluble in water and can form an emulsion in warm water at 35℃ to 45℃. However, after the thermal equipment is shut down for protection and the hot furnace is drained, as the temperature drops to room temperature, the octadecylamine remaining on the inner surface of the thermal equipment re-solidifies into a solid substance that is difficult to dissolve in water and cannot be completely discharged, resulting in the hydrogen conductivity of the water vapor quality being difficult to meet the standards in a short time when the thermal equipment is restarted, affecting the qualified rate of the water vapor quality, causing the unit to increase the water replenishment amount and water replenishment rate, especially remaining in places such as the liquid level gauge, causing the liquid level gauge to be stuck or inaccurate, thereby affecting the safe and economical operation of the equipment. In order to reduce the impact of residual octadecylamine in thermal equipment after shutdown protection on the normal production of thermal power units after startup, it is urgently necessary to adopt certain devices and methods to prepare shutdown protection agent solution so that octadecylamine still has good fluidity at room temperature and reduces the residual octadecylamine on the inner surface of thermal equipment after shutdown protection.

[0003] The Chinese patent CN206356144U in the prior art discloses a preparation device for an octadecylamine flotation reagent. However, when the temperature of the octadecylamine solution in the solution drops to room temperature, there is still a risk of re-precipitation from water. In addition, in order to promote the dissolution of octadecylamine, hydrochloric acid is added through a hydrochloric acid pipe. However, hydrochloric acid is a strong acid. Adding it to the flotation equipment system will cause potential acid corrosion to the metal equipment, affecting the safe production and life of the equipment. Utility Model Content

[0004] The utility model is developed to solve the above problems and aims to provide a preparation device for a compound shutdown protective agent.

[0005] The utility model provides a preparation device for a compound shutdown protective agent, which has the following characteristics: a grinder, which is used for grinding a dispersion of octadecylamine; a material pump, which is connected and communicated with the grinder and is used for conveying the ground dispersion of octadecylamine; an alkyl glycoside solution pipeline, which is used for conveying the alkyl glycoside solution; a mixing and stirring barrel, which is connected and communicated with the material pump and the alkyl glycoside solution pipeline and is used for receiving the dispersion of octadecylamine and the alkyl glycoside solution and mixing the two uniformly to obtain the compound shutdown protective agent; and a storage tank, which is connected and communicated with the mixing and stirring barrel and receives and stores the compound shutdown protective agent.

[0006] The preparation device of the compound shutdown protective agent provided by the utility model may also have the following characteristics: wherein, the preparation device of the compound shutdown protective agent also includes a flow module, which is connected to the material pump and the alkyl glycoside solution pipeline to adjust the flow of the octadecylamine dispersion and the alkyl glycoside solution.

[0007] In the preparation device of the compound shutdown protective agent provided by the utility model, it can also have the following characteristics: wherein, the flow module includes: a flow adjustment device, which is connected to the material pump through a signal line, and is used to adjust the flow rate of the dispersion of octadecylamine after grinding transported by the material pump; a flow valve, which is arranged on the alkyl glycoside solution pipeline, and is used to adjust the flow rate of the alkyl glycoside solution; and an operation panel, which is connected to the flow adjustment device and the flow valve through a signal line, and is used to operate and adjust the flow adjustment device and the flow valve.

[0008] The preparation device of the compound shutdown protective agent provided by the utility model may also have the following characteristics: wherein, the preparation device of the compound shutdown protective agent also includes a hopper, and the hopper includes: a feeding port, which is a wide-mouthed round table structure that is wide at the top and narrow at the bottom and is connected from top to bottom, and is used to feed the dispersion of octadecylamine; and a discharging port, which is an original cylindrical structure that is connected from top to bottom, and its top is connected and communicated with the bottom of the feeding port, and its bottom is connected and communicated with the grinder, and is used to introduce the dispersion of octadecylamine into the grinder.

[0009] The preparation device of the compound shutdown protective agent provided by the utility model may also have the following characteristics: wherein, the grinder includes: a grinding body, used to grind the dispersion of octadecylamine; a grinding inlet, which is opened on the grinding body and detachably connected to the discharge port, and is used to supply the dispersion of octadecylamine flowing out of the discharge port to flow into the grinding body; and a grinding outlet, which is opened on the grinding body and is used to export the dispersion of octadecylamine after grinding.

[0010] The preparation device of the compound shutdown protective agent provided by the utility model can also have the following characteristics: wherein, the mixing and stirring barrel comprises: a stirring barrel main body, which is an open barrel, and a plurality of semicircular protrusions are convexly arranged around the inside of the stirring barrel, and the plurality of protrusions are evenly distributed up and down, and the inner wall of the stirring barrel main body is wavy; a stirring barrel cover plate, which is sealedly arranged on the stirring barrel main body; a first feed port, which is opened on the stirring barrel cover plate, and is connected and communicated with the grinding outlet through a pipeline, and is used to receive the dispersion of octadecylamine, wherein the material pump is arranged on the pipeline between the first feed port and the grinding outlet; a second feed port, which is opened on the stirring barrel cover plate, and is connected and communicated with the alkyl glycoside solution pipeline; a first stirring device, which can be rotatably passed through the stirring barrel cover plate and penetrated into the stirring barrel main body, and is used to stir and mix the dispersion of octadecylamine and the alkyl glycoside solution; and a guide port, which is opened on the stirring barrel main body, and is used to guide out the compound shutdown protective agent.

[0011] The preparation device of the compound shutdown protective agent provided by the utility model may also have the following characteristics: wherein, the storage tank includes: a tank body, which is an open barrel structure, used to store the compound shutdown protective agent; a tank cover, which is sealed on the tank body; a protective agent inlet, which is opened on the tank cover and is connected and communicated with the outlet through a pipeline, so as to introduce the compound shutdown protective agent into the interior of the tank body; and a second stirring device, which can be rotatably passed through the tank cover and penetrated into the interior of the tank body, so as to stir the compound shutdown protective agent.

[0012] The device for preparing the compound shutdown protective agent provided by the utility model may also have the following feature: a gravity breathing valve is provided on the stirring barrel cover and / or the storage tank cover.

[0013] The preparation device of the compound shutdown protective agent provided by the utility model may also have the following characteristics: wherein, the first stirring device is eccentrically installed, and the first stirring device is not located at the central axis position of the stirring barrel body; the second stirring device is eccentrically installed, and the second stirring device is not located at the central axis position of the storage tank body.

[0014] The compound shutdown protective agent preparation device provided by the utility model may also have the following characteristics: wherein the horizontal position of the first feed port is located below the horizontal position of the grinding outlet, and the horizontal position of the protective agent inlet is located below the horizontal position of the outlet.

[0015] Functions and effects of utility models

[0016] According to the preparation device of a compound shutdown protective agent involved in the utility model, it comprises: a grinder, used for grinding the dispersion of octadecylamine; a material pump, connected and communicated with the grinder, used for conveying the dispersion of octadecylamine after grinding; an alkyl glycoside solution pipeline, used for conveying the alkyl glycoside solution; a mixing and stirring barrel, connected and communicated with the material pump and the alkyl glycoside solution pipeline, used for receiving the dispersion of octadecylamine and the alkyl glycoside solution and mixing the two uniformly to obtain the compound shutdown protective agent; and a storage tank, connected and communicated with the mixing and stirring barrel, receiving and storing the compound shutdown protective agent.

[0017] Therefore, the preparation device of the utility model has a reasonable structure. By utilizing the unique design inside the preparation device and the excellent solubility of the alkyl glycoside surfactant, the prepared compound shutdown protective agent mainly based on octadecylamine has good fluidity, is not easy to stratify, and has stable performance.

[0018] The preparation device of the composite shutdown protective agent of the utility model adds a small proportion of alkyl glycoside, but has good dissolution performance for octadecylamine, and the alkyl glycoside also has a certain corrosion inhibition effect on metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a preparation device for a compound shutdown protective agent in an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the utility model easy to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate a preparation device for a composite shutdown protective agent of the utility model.

[0021] <Example>

[0022] Figure 1 It is a structural schematic diagram of a preparation device for a compound shutdown protective agent in an embodiment of the utility model.

[0023] like Figure 1 As shown, this embodiment provides a preparation device 100 for a compound shutdown protective agent, including a hopper 10, a grinder 20, an alkyl glycoside solution pipeline 30, a mixing and stirring barrel 40, a material pump 50, a flow module 60 and a storage tank 70.

[0024] The hopper 10 includes a feeding port 11 and a discharging port 12 .

[0025] The feeding port 11 is a wide-mouthed round table structure that is wide at the top and narrow at the bottom and is connected from top to bottom, and is used for feeding the dispersion of octadecylamine.

[0026] The discharge port 12 is a cylindrical structure that is connected from top to bottom. The top of the discharge port 12 is connected and communicated with the bottom of the feed port 11, and the dispersion of octadecylamine flows out from the bottom.

[0027] The grinder 20 includes a grinding body 21 , a grinding inlet 22 , and a grinding outlet 23 .

[0028] The grinding body 21 is used for grinding the dispersion of octadecylamine.

[0029] The grinding inlet 22 is provided on the grinding body 21 and is detachably connected to the discharge port 12 , so as to allow the dispersion of octadecylamine flowing out of the discharge port 12 to flow into the grinding body 21 .

[0030] The grinding outlet 23 is provided at the bottom of the grinding body 21 and is used to discharge the dispersion of the ground octadecylamine.

[0031] The alkyl glycoside solution pipeline 30 is an output pipeline for the existing 2% concentration alkyl glycoside solution.

[0032] The mixing and stirring barrel 40 includes a stirring barrel body 41, a stirring barrel cover plate 42, a first feed port (not shown in the figure), a second feed port (not shown in the figure), a first stirring device 43 and a guide port (not shown in the figure).

[0033] The mixing barrel body 41 is an open barrel, and a plurality of semicircular protrusions are arranged around the inside of the mixing barrel body 41, and the plurality of protrusions are evenly distributed up and down so that the inner wall of the mixing barrel body 41 is wavy. Preferably, the mixing barrel body 41 in this embodiment is made of 304 stainless steel.

[0034] The mixing barrel cover plate 42 is sealingly disposed on the mixing barrel body 41 , and a gravity-type breathing valve 1 is disposed thereon.

[0035] The first feed inlet is provided on the stirring barrel cover 42 and is connected to the grinding outlet 23 through a pipeline for receiving the dispersion of octadecylamine. The horizontal position of the first feed inlet is below the horizontal position of the grinding outlet 23 .

[0036] The second feed port is provided on the stirring barrel cover plate 42 and is connected to and communicated with the alkyl glycoside solution pipeline 30 to receive the alkyl glycoside solution.

[0037] The first stirring device 43 can be rotatably installed through the stirring barrel cover 42 and penetrate into the stirring barrel body 41 to stir and mix the dispersion of octadecylamine and the alkyl glycoside solution to obtain a compounded shutdown protective agent; the first stirring device 43 is eccentrically installed and is not located at the central axis position of the stirring barrel body 41.

[0038] The outlet is provided at the bottom of the side wall of the mixing barrel body 41 and is used for outlet of the compounded furnace shutdown protective agent.

[0039] The material pump 50 is disposed on the pipeline connecting the first feed port and the grinding outlet 23, and is used to adjust the outflow rate of the dispersion of octadecylamine.

[0040] The flow module 60 includes a flow adjustment device 61 , a flow valve 62 and an operation panel 63 .

[0041] The flow rate adjustment device 61 is connected to the material pump 50 via a signal line, and is used to adjust the flow rate of the dispersion of the ground octadecylamine delivered by the material pump 50 .

[0042] The flow valve 62 is disposed on the alkyl glycoside solution pipeline 30 to adjust the flow of the alkyl glycoside solution.

[0043] The operation panel 63 is connected to the flow control device 61 and the flow valve 62 through signal lines, respectively, and is used to operate and adjust the flow control device 61 and the flow valve 62 .

[0044] The storage tank 70 includes a storage tank body 71 , a storage tank cover 72 , a protective agent inlet (not shown in the figure) and a second stirring device 73 .

[0045] The storage tank body 71 is an open barrel structure, which is used to store the compound shutdown protective agent.

[0046] The tank cover plate 72 is sealingly disposed on the tank body 71 , and a gravity-type breathing valve 1 is disposed thereon.

[0047] The protective agent inlet is provided on the tank cover plate 72 and is connected to the outlet through a pipeline for introducing the compounded shutdown protective agent into the tank body 71 ; the protective agent inlet is located at a level below the outlet.

[0048] The second stirring device 73 can be rotatably installed through the tank cover 72 and penetrate into the tank body 71 to stir the compounded shutdown protective agent; the second stirring device 73 is eccentrically installed and is not located at the central axis of the tank body 71.

[0049] Preferably, the pipelines in this embodiment are all made of silicone rubber tubes with good flexibility and aging resistance.

[0050] The use process of the compound shutdown protective agent preparation device 100 is as follows:

[0051] S01, a certain proportion of octadecylamine dispersion (octadecylamine and water are separated into layers) is put into the feeding port 11, and enters the grinding body 21 through the discharge port 12 and the grinding inlet 22 for grinding.

[0052] S02, the ground octadecylamine dispersion flows into the stirring barrel body 41 through the grinding outlet 23, the material pump 50 and the first feed port through the pipeline; the alkyl glycoside solution flows into the stirring barrel body 41 from the second feed port through the alkyl glycoside solution pipeline 30.

[0053] In this step, the mixing ratio and mixing time of the octadecylamine dispersion and the alkyl glycoside solution are adjusted through the operation panel 63 through the flow control device 61 and the flow valve 62 respectively.

[0054] S03, the octadecylamine dispersion and the alkyl polyglycoside solution are eccentrically stirred by the first stirring device 43 in the stirring barrel body 41 to form an aqueous solution with good fluidity (taking advantage of the excellent surface activity of the alkyl polyglycoside), and then introduced into the storage tank body 71 through the outlet and the protective agent inlet for storage.

[0055] Functions and Effects of the Embodiments

[0056] A preparation device for a compound shutdown protective agent provided in this embodiment includes: a grinder for grinding a dispersion of octadecylamine; a material pump connected and communicated with the grinder, for conveying the ground dispersion of octadecylamine; an alkyl glycoside solution pipeline, for conveying the alkyl glycoside solution; a mixing and stirring barrel, connected and communicated with the material pump and the alkyl glycoside solution pipeline, for receiving the dispersion of octadecylamine and the alkyl glycoside solution and mixing the two uniformly to obtain a compound shutdown protective agent; and a storage tank, connected and communicated with the mixing and stirring barrel, for receiving and storing the compound shutdown protective agent.

[0057] Therefore, the preparation device of the compound shutdown protective agent of the present embodiment has a reasonable structure. By utilizing the unique design inside the preparation device and the excellent solubility of the alkyl glycoside surfactant, the prepared compound shutdown protective agent mainly based on octadecylamine has good fluidity, is not easy to stratify, and has stable performance; the preparation device of the compound shutdown protective agent of the present embodiment adds a small proportion of alkyl glycoside, but has good solubility for octadecylamine, and the alkyl glycoside also has a certain corrosion inhibition effect on metals.

[0058] Furthermore, the preparation device of the compound shutdown protective agent also includes a flow module, which is connected to the material pump and the alkyl glycoside solution pipeline, and is used to adjust the flow of the octadecylamine dispersion and the alkyl glycoside solution. The flow module includes: a flow adjustment device, which is connected to the material pump through a signal line, and is used to adjust the flow of the octadecylamine dispersion after the material pump conveys the ground octadecylamine; a flow valve, which is arranged on the alkyl glycoside solution pipeline, and is used to adjust the flow of the alkyl glycoside solution; and an operation panel, which is connected to the flow adjustment device and the flow valve through a signal line, and is used to operate and adjust the flow adjustment device and the flow valve. The setting of the flow module allows the mixing ratio and mixing time of the octadecylamine dispersion and the alkyl glycoside solution to be effectively adjusted according to actual needs.

[0059] Furthermore, the preparation device of the compound shutdown protective agent also includes a hopper, which includes: a feeding port, which is a wide-top, narrow-bottom and through-through wide-mouthed round table structure, for feeding the dispersion of octadecylamine; and a discharge port, which is a through-through original cylindrical structure, the top of which is connected and communicated with the bottom of the feeding port, and the bottom is connected and communicated with the grinder, for introducing the dispersion of octadecylamine into the grinder. Such an arrangement reduces the splashing of the dispersion of octadecylamine caused by too fast feeding during feeding, and reduces losses and waste.

[0060] Furthermore, the grinder includes: a grinding body for grinding the dispersion of octadecylamine; a grinding inlet, which is provided on the grinding body and detachably connected to the discharge port, for supplying the dispersion of octadecylamine flowing out of the discharge port into the grinding body; and a grinding outlet, which is provided on the grinding body and is used to guide the dispersion of octadecylamine after grinding. Such an arrangement can fully grind octadecylamine into extremely fine particles.

[0061] Furthermore, the mixing and stirring barrel comprises: a stirring barrel body, which is an open barrel, and a plurality of semicircular protrusions are convexly arranged around the inside of the stirring barrel, and the plurality of protrusions are evenly distributed up and down, and the inner wall of the stirring barrel body is wavy; a stirring barrel cover plate, which is sealedly arranged on the stirring barrel body; a first feed port, which is opened on the stirring barrel cover plate, and is connected and communicated with the grinding outlet through a pipeline, and is used to receive the dispersion of octadecylamine, wherein the material pump is arranged on the pipeline between the first feed port and the grinding outlet; a second feed port, which is opened on the stirring barrel cover plate, and is connected and communicated with the alkyl glycoside solution pipeline; a first stirring device, which can be rotatably arranged through the stirring barrel cover plate and penetrate into the stirring barrel body, and is used to stir and mix the dispersion of octadecylamine and the alkyl glycoside solution; and a lead-out port, which is opened on the stirring barrel body, and is used to lead out the compound shutdown protective agent. The wavy design of the inner wall of the stirring barrel body makes the mixed liquid collide with the wavy inner wall during the stirring process, forming turbulence to increase the stirring effect.

[0062] Furthermore, the storage tank includes: a storage tank body, which is an open barrel structure, used to store the compound shutdown protective agent; a storage tank cover plate, which is sealed and arranged on the storage tank body; a protective agent inlet, which is opened on the storage tank cover plate, connected and communicated with the outlet through a pipeline, and is used to introduce the compound shutdown protective agent into the storage tank body; and a second stirring device, which can be rotatably passed through the storage tank cover plate and penetrated into the storage tank body, and is used to stir the compound shutdown protective agent. With such an arrangement, the dispersion of octadecylamine and the alkyl glycoside solution can maintain a uniform and stable state when they are mixed and stored.

[0063] Furthermore, a gravity breathing valve is provided on the mixing barrel cover and / or the storage tank cover. The gravity breathing valve works by balancing the weight of the valve disc itself with the lifting force generated by the pressure difference between the inside and outside of the tank, which can ensure the sealing of the pressure inside the tank and the outside of the tank without causing danger due to excessive pressure difference between the inside and outside.

[0064] Furthermore, the first stirring device is eccentrically installed, and the first stirring device is not located at the central axis position of the stirring barrel body, and the second stirring device is eccentrically installed, and the second stirring device is not located at the central axis position of the storage tank body. The eccentric installation can avoid the occurrence of vortices, increase the turbulence of the liquid material, and improve the stirring effect.

[0065] Furthermore, the first feed port is located at a level below the grinding outlet, and the protective agent inlet is located at a level below the outlet. This arrangement allows the liquid to flow by itself by utilizing gravity without applying external pressure, thereby reducing energy consumption.

[0066] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A preparation device for a composite shutdown protective agent, characterized in that: include: A grinder for grinding the dispersion of octadecylamine; A material pump, connected and communicated with the grinder, for conveying the dispersion of the ground octadecylamine; An alkyl glycoside solution pipeline, used for conveying the alkyl glycoside solution; A mixing and stirring barrel, connected and communicated with the material pump and the alkyl polyglycoside solution pipeline, for receiving the octadecylamine dispersion and the alkyl polyglycoside solution and mixing the two uniformly to obtain a composite shutdown protective agent; as well as The storage tank is connected and communicated with the mixing and stirring barrel to receive and store the compounded shutdown protective agent.

2. The preparation device of the composite shutdown protective agent according to claim 1, characterized in that: in, The preparation device of the composite shutdown protective agent also includes a flow module, The flow module is connected to the material pump and the alkyl glycoside solution pipeline, and is used to adjust the flow of the octadecylamine dispersion and the alkyl glycoside solution.

3. The preparation device of the composite shutdown protective agent according to claim 2, Features: in, The flow module comprises: A flow rate adjustment device, connected to the material pump via a signal line, and used for adjusting the flow rate of the dispersion of the ground octadecylamine transported by the material pump; A flow valve, disposed on the pipeline of the alkyl glycoside solution, for adjusting the flow of the alkyl glycoside solution; as well as An operation panel is connected to the flow regulating device and the flow valve through a signal line, and is used to operate and adjust the flow regulating device and the flow valve.

4. The preparation device of the composite shutdown protective agent according to claim 1, Features: in, The compound shutdown protective agent preparation device also includes a hopper, The hopper comprises: The feeding port is a wide-mouthed round table structure that is wide at the top and narrow at the bottom and is connected from top to bottom, and is used to feed the dispersion of the octadecylamine; and The discharge port is a cylindrical structure that penetrates from top to bottom, the top of which is connected and communicated with the bottom of the feed port, and the bottom is connected and communicated with the grinder, and is used to introduce the dispersion of octadecylamine into the grinder.

5. The preparation device of the composite shutdown protective agent according to claim 4, Features: in, The grinding machine comprises: A grinding body, used for grinding the dispersion of the octadecylamine; A grinding inlet is provided on the grinding body and is detachably connected to the discharge port, so as to allow the dispersion of the octadecylamine flowing out of the discharge port to flow into the grinding body; as well as A grinding outlet is provided on the grinding body and is used for guiding out the dispersion of the octadecylamine after grinding.

6. The preparation device of the composite shutdown protective agent according to claim 5, Features: in, The mixing and stirring barrel comprises: The mixing barrel body is an open barrel, and a plurality of semicircular protrusions are arranged around the inside of the barrel, and the protrusions are evenly distributed up and down, and the inner wall of the mixing barrel body is wavy; A mixing barrel cover plate is sealingly arranged on the mixing barrel body; A first feed inlet is provided on the cover plate of the mixing barrel, connected and communicated with the grinding outlet through a pipeline, and is used to receive the dispersion of octadecylamine, wherein the feed pump is provided on the pipeline between the first feed inlet and the grinding outlet; A second feed port is provided on the cover plate of the stirring barrel and is connected and communicated with the alkyl glycoside solution pipeline; A first stirring device, rotatably disposed through the stirring barrel cover and extending into the stirring barrel body, for stirring and mixing the octadecylamine dispersion and the alkyl glycoside solution; and The outlet is provided on the stirring barrel body and is used for outletting the compound furnace shutdown protective agent.

7. The preparation device of the composite shutdown protective agent according to claim 6, Features: in, The storage tank comprises: The storage tank body is an open barrel structure and is used to store the compound shutdown protective agent; A storage tank cover plate, sealingly disposed on the storage tank body; A protective agent inlet is provided on the tank cover plate, connected and communicated with the outlet through a pipeline, and is used to introduce the compound shutdown protective agent into the tank body; and The second stirring device is rotatably arranged through the storage tank cover plate and penetrates into the interior of the storage tank body, and is used for stirring the compound shutdown protective agent.

8. The preparation device of the composite shutdown protective agent according to claim 7, characterized in that: in, The mixing barrel cover plate and / or the storage tank cover plate are both provided with a gravity breathing valve.

9. The preparation device of the composite shutdown protective agent according to claim 7, characterized in that: in, The first stirring device is eccentrically installed, and the first stirring device is not located at the central axis of the stirring barrel body. The second stirring device is eccentrically installed, and the second stirring device is not located at the central axis of the storage tank body.

10. The preparation device of the composite shutdown protective agent according to claim 7, characterized in that: in, The horizontal position of the first feed port is located below the horizontal position of the grinding outlet, and the horizontal position of the protective agent inlet is located below the horizontal position of the guide port.

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