A safe and energy-saving production device based on hot-process yellow phosphorus furnace

Abstract

The utility model provides a kind of based on the safe energy-saving production device of hot-process phosphoric acid yellow phosphorus into furnace, it is related to yellow phosphorus technical field. Including yellow phosphorus measuring tank, liquid seal water input component and yellow phosphorus output component, the quantity of yellow phosphorus measuring tank is at least two, liquid seal water input component includes liquid seal water input main pipe and liquid seal water input branch pipe, and liquid seal water input main pipe is equipped with flowmeter;Liquid seal water input branch pipe is communicated with yellow phosphorus measuring tank, and liquid seal water input branch pipe is equipped with liquid seal water input valve;Yellow phosphorus output component includes yellow phosphorus output main pipe and yellow phosphorus output branch pipe, and yellow phosphorus output branch pipe is communicated with yellow phosphorus measuring tank, and yellow phosphorus output branch pipe is equipped with yellow phosphorus output valve.Using the utility model, it can be equal-volume replacement liquid yellow phosphorus by the way of accurate measurement hot water, and liquid yellow phosphorus is pressed to burn in phosphorus furnace, and the flow of yellow phosphorus can be accurately obtained;And by at least two yellow phosphorus measuring tanks are used in cooperation, yellow phosphorus can be continuously transported to phosphorus furnace, and production progress is improved.

Description

Technical Field

[0001] This utility model relates to the field of yellow phosphorus technology, and more specifically, to a safe and energy-saving production device based on thermal yellow phosphoric acid furnace feeding. Background Technology

[0002] In existing technologies, solid yellow phosphorus is melted into liquid yellow phosphorus by heating with hot water. The liquid yellow phosphorus is then stored in a large yellow phosphorus storage tank. Currently, thermal phosphoric acid production enterprises mainly use submersible pumps from the large yellow phosphorus storage tank to directly feed the liquid yellow phosphorus into the spray gun of the phosphorus combustion furnace. The liquid yellow phosphorus and compressed air enter the spray gun separately, atomize at the end of the spray gun, and then enter the phosphorus combustion furnace for combustion. Secondary air is naturally supplemented through air pipes for combustion. Inside the phosphorus combustion furnace, yellow phosphorus burns to generate bimolecular phosphoric acid pentoxide (phosphorus tetradecoxide) gas. The phosphorus pentoxide-containing gas enters the hydration tower, where it is absorbed by circulating phosphoric acid to form phosphoric acid. Due to the easily solidified and flammable physical properties of yellow phosphorus, the flow rate of yellow phosphorus entering the phosphorus combustion furnace cannot be accurately measured. Therefore, the amount of atomizing air and the amount of circulating acid in the downstream phosphorus pentoxide absorption tower cannot be adjusted by flow rate regulation. This results in incomplete combustion of yellow phosphorus in the phosphorus combustion furnace, causing phosphides to splash onto the furnace wall surface, adhere, and continue to burn, leading to localized overheating, penetration, scaling, and other phosphide corrosion damage to the phosphorus combustion furnace.

[0003] A Chinese utility model patent with authorization announcement number CN202369396U discloses a water-pressure phosphorus addition device, specifically: hot water is first transported from the hot water inlet of a high-level tank to a high-level hot water tank for storage, and then enters a flow meter through the hot water outlet of the high-level tank. The hot water flow rate is regulated by the flow meter, and after the flow rate is regulated, it flows from the hot water inlet into the yellow phosphorus metering tank. Under the action of hot water pressure, the yellow phosphorus flows from the phosphorus pressing pipe through the phosphorus conveying port to the next stage, thus completing the process of adding the metered yellow phosphorus to the next stage, such as the chlorination reactor. Although this prior art can measure the flow rate of yellow phosphorus by water pressure, it only has one yellow phosphorus metering tank. When the yellow phosphorus in the yellow phosphorus metering tank is used up, the phosphorus combustion furnace needs to be shut down and yellow phosphorus needs to be added through the phosphorus inlet before it can be used again, affecting the production schedule. Utility Model Content

[0004] The purpose of this invention is to provide a safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus entering the furnace. It can not only replace liquid yellow phosphorus with an equal volume by accurately metering hot water and press the liquid yellow phosphorus into the phosphorus combustion furnace for combustion, thus accurately obtaining the flow rate of yellow phosphorus; but also, by using at least two yellow phosphorus metering tanks in cooperation with each other, yellow phosphorus can be continuously delivered to the phosphorus combustion furnace, thereby improving the production progress.

[0005] The technical solution adopted in this utility model is as follows:

[0006] This application provides a safe and energy-saving production device for thermally produced yellow phosphoric acid, including a yellow phosphorus metering tank, a liquid-sealed water input component, and a yellow phosphorus output component. The number of yellow phosphorus metering tanks is at least two. The liquid-sealed water input component includes a main liquid-sealed water input pipe and multiple liquid-sealed water input branch pipes connected to the main liquid-sealed water input pipe. The main liquid-sealed water input pipe is equipped with a flow meter. Each liquid-sealed water input branch pipe corresponds to and is connected to a yellow phosphorus metering tank. Each liquid-sealed water input branch pipe is equipped with a liquid-sealed water input valve.

[0007] The yellow phosphorus output assembly includes a yellow phosphorus output main pipe and multiple yellow phosphorus output branch pipes connected to the yellow phosphorus output main pipe. Each yellow phosphorus output branch pipe corresponds to and is connected to a yellow phosphorus metering tank. Each yellow phosphorus output branch pipe is equipped with a yellow phosphorus output valve. The height of the end of the yellow phosphorus output branch pipe connected to the yellow phosphorus metering tank is lower than the height of the end of the liquid seal water input branch pipe connected to the yellow phosphorus metering tank.

[0008] Furthermore, in some embodiments of this utility model, a yellow phosphorus input component is also included. The yellow phosphorus input component includes a yellow phosphorus input main pipe and a plurality of yellow phosphorus input branch pipes connected to the yellow phosphorus input main pipe. Each yellow phosphorus input branch pipe corresponds to and is connected to a yellow phosphorus metering tank. Each yellow phosphorus input branch pipe is equipped with a yellow phosphorus input valve.

[0009] Furthermore, in some embodiments of this utility model, a liquid-sealed water overflow assembly is also included. The liquid-sealed water overflow assembly includes a liquid-sealed water overflow output main pipe and multiple liquid-sealed water overflow output branch pipes connected to the liquid-sealed water overflow output main pipe. Each liquid-sealed water overflow output branch pipe corresponds to a yellow phosphorus metering tank and is connected to the top of the yellow phosphorus metering tank. Each liquid-sealed water overflow output branch pipe is equipped with a liquid-sealed water overflow output valve.

[0010] Furthermore, in some embodiments of this utility model, the liquid-sealed water input assembly further includes a hot water tank and a liquid-sealed water input pipe, the liquid-sealed water input pipe being connected to the hot water tank; the end of the liquid-sealed water input main pipe away from the yellow phosphorus metering tank is connected to the hot water tank, and the liquid-sealed water input main pipe is equipped with a phosphorus-pressing water pump.

[0011] Furthermore, in some embodiments of this utility model, the hot water tank is provided with a first steam inlet.

[0012] Furthermore, in some embodiments of this utility model, both the liquid seal water inlet main pipe and the liquid seal water inlet pipe are equipped with flow regulating valves.

[0013] Furthermore, in some embodiments of this utility model, a heating outer liner is provided outside the yellow phosphorus metering tank, and a heating chamber is formed between the heating outer liner and the yellow phosphorus metering tank. The heating outer liner has a second steam inlet and a condensate outlet that communicate with the heating chamber.

[0014] Furthermore, in some embodiments of this utility model, the yellow phosphorus metering tank is equipped with a thermometer, a level gauge, and a pressure gauge.

[0015] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0016] This application can replace liquid yellow phosphorus by accurately metering hot water to pressurize the liquid yellow phosphorus into the phosphorus combustion furnace for combustion, and can accurately obtain the flow rate of yellow phosphorus; moreover, by using at least two yellow phosphorus metering tanks in cooperation, yellow phosphorus can be continuously delivered to the phosphorus combustion furnace, thereby improving the production progress. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the safe and energy-saving production device provided in the embodiments of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation structure of the safe and energy-saving production device provided in this embodiment of the utility model.

[0020] icon:

[0021] 10-Yellow phosphorus metering tank; 11-Heating outer liner; 12-Heating chamber; 13-Second steam inlet; 14-Thermometer; 15-Level gauge; 16-Pressure gauge; 17-Weight sensor; 18-Condensate outlet;

[0022] 20-Liquid seal water inlet assembly; 21-Liquid seal water inlet main pipe; 22-Liquid seal water inlet branch pipe; 23-Liquid seal water inlet valve; 24-Flow meter; 25-Hot water tank; 26-Liquid seal water inlet pipe; 27-Phosphorus-pressing water pump; 28-Flow regulating valve; 29-First steam inlet;

[0023] 30 - Yellow phosphorus output assembly; 31 - Yellow phosphorus output main pipe; 32 - Yellow phosphorus output branch pipe; 33 - Yellow phosphorus output valve;

[0024] 40 - Yellow phosphorus inlet assembly; 41 - Yellow phosphorus inlet main pipe; 42 - Yellow phosphorus inlet branch pipe; 43 - Yellow phosphorus inlet valve;

[0025] 50 - Liquid seal water overflow assembly; 51 - Liquid seal water overflow main pipe; 52 - Liquid seal water overflow branch pipe; 53 - Liquid seal water overflow valve;

[0026] 60 - Phosphorus-burning furnace; 61 - Spray gun;

[0027] 70-Hydration Tower. Detailed Implementation

[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0029] Example

[0030] Please refer to Figures 1-2 This embodiment provides a safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus furnace feeding, including a yellow phosphorus metering tank 10, a liquid seal water input component 20, and a yellow phosphorus output component 30. The number of yellow phosphorus metering tanks 10 is at least two. The liquid seal water input component 20 includes a liquid seal water input main pipe 21 and multiple liquid seal water input branch pipes 22 connected to the liquid seal water input main pipe 21. The liquid seal water input main pipe 21 is equipped with a flow meter 24. The liquid seal water input branch pipes 22 correspond one-to-one with the yellow phosphorus metering tanks 10 and are connected to the yellow phosphorus metering tanks 10. Each liquid seal water input branch pipe 22 is equipped with a liquid seal water input valve 23.

[0031] The yellow phosphorus output assembly 30 includes a yellow phosphorus output main pipe 31 and a plurality of yellow phosphorus output branch pipes 32 connected to the yellow phosphorus output main pipe 31. Each yellow phosphorus output branch pipe 32 corresponds to and is connected to the yellow phosphorus metering tank 10. Each yellow phosphorus output branch pipe 32 is equipped with a yellow phosphorus output valve 33. The height of the end of the yellow phosphorus output branch pipe 32 connected to the yellow phosphorus metering tank 10 is lower than the height of the end of the liquid seal water input branch pipe 22 connected to the yellow phosphorus metering tank 10.

[0032] This embodiment also includes a yellow phosphorus input component 40, which includes a yellow phosphorus input main pipe 41 and a plurality of yellow phosphorus input branch pipes 42 connected to the yellow phosphorus input main pipe 41. Each yellow phosphorus input branch pipe 42 corresponds to and is connected to the yellow phosphorus metering tank 10. Each yellow phosphorus input branch pipe 42 is equipped with a yellow phosphorus input valve 43.

[0033] This embodiment also includes a liquid seal water overflow assembly 50, which includes a liquid seal water overflow output main pipe 51 and a plurality of liquid seal water overflow output branch pipes 52 connected to the liquid seal water overflow output main pipe 51. Each liquid seal water overflow output branch pipe 52 corresponds to a yellow phosphorus metering tank 10 and is connected to the top of the yellow phosphorus metering tank 10. Each liquid seal water overflow output branch pipe 52 is provided with a liquid seal water overflow output valve 53.

[0034] In this specific implementation, two yellow phosphorus metering tanks 10 are used, and two liquid seal water inlet branch pipes 22, 32, 42, and 52 are also used. The end of the yellow phosphorus inlet main pipe 41 furthest from the yellow phosphorus metering tank 10 is connected to a yellow phosphorus submersible pump in the large yellow phosphorus storage tank. The liquid yellow phosphorus stored in the large yellow phosphorus storage tank is pumped into the yellow phosphorus inlet main pipe 41 by the submersible pump. The end of the yellow phosphorus outlet main pipe 31 furthest from the yellow phosphorus metering tank 10 is connected to the spray gun 61 of the phosphorus combustion furnace 60. The pressed-out liquid yellow phosphorus is transported to the spray gun 61 for combustion through the yellow phosphorus outlet main pipe 31. The liquid seal water inlet pipe 21 is used to input liquid seal water into the yellow phosphorus metering tank 10. It should be noted that the liquid seal water is generally industrial water, which has a lower density than liquid yellow phosphorus. When liquid seal water and liquid yellow phosphorus are both in the yellow phosphorus metering tank 10, the liquid seal water is on top of the liquid yellow phosphorus. Furthermore, liquid yellow phosphorus is only slightly soluble in water, and this amount of dissolution does not affect the metering of the liquid yellow phosphorus. The liquid seal water overflow assembly 50 is used for the liquid seal water to overflow from the yellow phosphorus metering tank 10. The end of the liquid seal water overflow outlet pipe 51, away from the yellow phosphorus metering tank 10, is connected to the liquid seal water at the location of the large yellow phosphorus storage tank, allowing the liquid seal water to overflow back to the large yellow phosphorus storage tank.

[0035] In actual use, the two yellow phosphorus metering tanks 10 work together. While the first yellow phosphorus metering tank 10 supplies liquid yellow phosphorus to the spray gun 61 of the phosphorus combustion furnace 60, the second yellow phosphorus metering tank 10 is used to input liquid yellow phosphorus pumped from the yellow phosphorus liquid submersible pump. When the liquid yellow phosphorus in the first yellow phosphorus metering tank 10 is used up, the system can be switched immediately so that the second yellow phosphorus metering tank 10 supplies liquid yellow phosphorus to the spray gun 61 of the phosphorus combustion furnace 60, while the first yellow phosphorus metering tank 10 inputs liquid yellow phosphorus pumped from the yellow phosphorus liquid submersible pump. This cross-cycle operation can avoid downtime of the phosphorus combustion furnace 60 and improve production progress.

[0036] The specific operating principle is as follows:

[0037] When the first yellow phosphorus metering tank 10 supplies liquid yellow phosphorus to the spray gun 61 of the phosphorus combustion furnace 60, the second yellow phosphorus metering tank 10 receives liquid yellow phosphorus pumped from the yellow phosphorus liquid submersible pump. At this time, the yellow phosphorus output valve 33 corresponding to the first yellow phosphorus metering tank 10 opens, the liquid seal water input valve 23 opens, the yellow phosphorus input valve 43 closes, and the liquid seal water overflow output valve 53 closes. Simultaneously, the yellow phosphorus output valve 33 corresponding to the second yellow phosphorus metering tank 10 closes, the liquid seal water input valve 23 closes, the yellow phosphorus input valve 43 opens, and the liquid seal water overflow output valve 53 opens. At this time, as the liquid-sealed water enters the liquid-sealed water input branch pipe 22 through the liquid-sealed water input main pipe 21, the liquid-sealed water can enter the first yellow phosphorus metering tank 10 through the liquid-sealed water input valve 23 corresponding to the first yellow phosphorus metering tank 10. Under the pressure of the liquid-sealed water, the liquid yellow phosphorus at the bottom of the liquid-sealed water will flow into the yellow phosphorus output branch pipe 32 corresponding to the first yellow phosphorus metering tank 10, and enter the yellow phosphorus output main pipe 31 through the corresponding yellow phosphorus output valve 33. At this time, the liquid yellow phosphorus can be input into the spray gun 61 of the phosphorus combustion furnace 60 for combustion. Since the liquid yellow phosphorus is replaced by the same volume, that is, the volume of liquid-sealed water in the yellow phosphorus metering tank 10 is equal to the volume of liquid yellow phosphorus in the output yellow phosphorus metering tank 10, the flow rate of the liquid-sealed water can be measured by the flow meter 24 of the liquid-sealed water input main pipe 21 to indirectly obtain the output liquid yellow phosphorus flow rate, thereby indirectly obtaining the accurate flow rate of yellow phosphorus entering the spray gun 61 of the phosphorus combustion furnace 60. The flow rate can be measured to adjust the atomized air entering the spray gun 61, as well as the circulation volume of the circulating acid in the subsequent hydration tower 70, thereby reducing the circulation volume, saving energy, and improving the absorption efficiency of the hydration tower 70.

[0038] As the first yellow phosphorus metering tank 10 supplies liquid yellow phosphorus to the spray gun 61 of the phosphorus combustion furnace 60, the liquid yellow phosphorus pumped by the submersible yellow phosphorus pump is delivered to the yellow phosphorus input main pipe 41. The liquid yellow phosphorus then enters the second yellow phosphorus metering tank 10 through the yellow phosphorus input branch pipe 42 and the yellow phosphorus input valve 43. The input liquid yellow phosphorus settles at the bottom of the liquid seal water in the second yellow phosphorus metering tank 10. At this time, the liquid seal water in the second yellow phosphorus metering tank 10 is squeezed into the liquid seal water overflow output branch pipe 52. The liquid seal water flows into the large yellow phosphorus storage tank through the liquid seal water overflow output valve 53 and the liquid seal water overflow output main pipe 51 for circulation. At this time, the second yellow phosphorus metering tank 10 gradually fills with liquid yellow phosphorus and is ready for use.

[0039] When the liquid yellow phosphorus in the first yellow phosphorus metering tank 10 is used up and the liquid yellow phosphorus in the second yellow phosphorus metering tank 10 is full, a switchover is required. During the switchover, the yellow phosphorus output valve 33 corresponding to the first yellow phosphorus metering tank 10 is closed, the liquid seal water input valve 23 is closed, the yellow phosphorus input valve 43 is opened, and the liquid seal water overflow output valve 53 is opened; at the same time, the yellow phosphorus output valve 33 corresponding to the second yellow phosphorus metering tank 10 is opened, the liquid seal water input valve 23 is opened, the yellow phosphorus input valve 43 is closed, and the liquid seal water overflow output valve 53 is closed.

[0040] Optionally, all the yellow phosphorus output valves 33, liquid seal water input valves 23, 43, and 53 of the liquid seal water overflow output valve in this embodiment can be electrically controlled valves, which can be connected to an existing distributed control system for control. The flow meter 24 is connected to the distributed control system to transmit the detected flow information to the distributed control system. A distributed control system (DCS) is a control system in the field of industrial automation, also known as a centralized control system, and is widely used in industries such as power, metallurgy, and petrochemicals. In this embodiment, the yellow phosphorus input valve 43 and yellow phosphorus output valve 33 are normally immersed in a hot water tank to prevent yellow phosphorus from splashing out, as a safety measure.

[0041] like Figures 1-2 As shown, in some embodiments, the liquid-sealed water input assembly 20 further includes a hot water tank 25 and a liquid-sealed water input pipe 26, with the liquid-sealed water input pipe 26 connected to the hot water tank 25; the end of the liquid-sealed water input main pipe 21 away from the yellow phosphorus metering tank 10 is connected to the hot water tank 25, and the liquid-sealed water input main pipe 21 is equipped with a phosphorus-pressing water pump 27, while the hot water tank 25 is equipped with a first steam inlet 29. Since liquid yellow phosphorus gradually solidifies when the temperature is below its melting point, this invention, by setting up a hot water tank 25 and a first steam inlet 29, allows the liquid-sealed water from the large yellow phosphorus storage tank to be temporarily stored in the hot water tank 25 through the liquid-sealed water input pipe 26. Hot steam can then be introduced into the hot water tank 25 through the first steam inlet 29 to heat the liquid-sealed water (generally heated to a set temperature of 60°C with steam). Then, the heated liquid-sealed water is transported to the yellow phosphorus metering tank 10 through the phosphorus-pressing water pump 27. This ensures that the liquid-sealed water entering the yellow phosphorus metering tank 10 maintains a relatively high temperature, preventing the liquid yellow phosphorus from solidifying due to excessively low temperatures.

[0042] like Figures 1-2 As shown, in some embodiments, both the liquid-sealed water inlet main pipe 21 and the liquid-sealed water inlet pipe 26 are equipped with flow regulating valves 28. The flow regulating valve 28 of the liquid-sealed water inlet pipe 26 can regulate the flow rate of liquid-sealed water entering the hot water tank 25, and the flow regulating valve 28 of the liquid-sealed water inlet main pipe 21 can control the liquid yellow phosphorus entering the yellow phosphorus metering tank 10 by adjusting its opening. The production load can be adjusted according to market needs to achieve flexible production of the device.

[0043] like Figures 1-2 As shown, in some embodiments, the yellow phosphorus metering tank 10 is provided with a heating outer liner 11, and a heating chamber 12 is formed between the heating outer liner 11 and the yellow phosphorus metering tank 10. The heating outer liner 11 has a second steam inlet 13 and a condensate outlet 18 that connect to the heating chamber 12. By providing a heating outer liner 11 and a second steam inlet 13, this invention allows hot steam to be input into the heating chamber 12 through the second steam inlet 13 during use. The steam heats the yellow phosphorus metering tank 10, thus heating the liquid yellow phosphorus inside and preventing it from solidifying. The resulting condensate can flow out from the condensate outlet 18.

[0044] like Figures 1-2 As shown, in some embodiments, the yellow phosphorus metering tank 10 is equipped with a thermometer 14, a level gauge 15, and a pressure gauge 16. In this embodiment, the thermometer 14, level gauge 15, and pressure gauge 16 can all be connected to an existing distributed control system for control. The detection end of the thermometer 14 is located inside the yellow phosphorus metering tank 10, and it is used to detect the temperature inside the yellow phosphorus metering tank 10 and transmit the temperature information to the distributed control system. The amount of steam input can be controlled by the temperature information detected by the thermometer 14.

[0045] The level gauge 15 is a float level gauge located inside the yellow phosphorus metering tank 10. The float density of the level gauge is set to be greater than the density of the liquid seal water but less than the density of the liquid yellow phosphorus. Thus, the float level gauge floats on top of the liquid yellow phosphorus and at the bottom of the liquid seal water. The level gauge 15 can detect the liquid yellow phosphorus level and transmit this information to the distributed control system. The level gauge 15 can detect the liquid yellow phosphorus level to determine the operating status of the corresponding yellow phosphorus metering tank 10, and the distributed control system can automatically switch and replenish the liquid yellow phosphorus in a timely manner to ensure normal and continuous production.

[0046] Pressure gauge 16 is used to detect the pressure inside the yellow phosphorus metering tank 10 and transmit the pressure information to the distributed control system. Thus, if an abnormal situation occurs during production, such as pressure gauge 16 detecting excessively high pressure inside the yellow phosphorus metering tank 10, the distributed control system can control the liquid seal water input valve 23 to close and cut off the liquid seal water input, control the yellow phosphorus input valve 43 to close and cut off the liquid yellow phosphorus input, and control the liquid seal water overflow output valve 53 to open and reduce pressure.

[0047] Optionally, a weight sensor 17 can be installed at the bottom of the yellow phosphorus metering tank 10 in this embodiment. In this case, the connection between each pipe and the yellow phosphorus metering tank 10 is a soft connection to prevent each pipe from affecting the weighing weight of the yellow phosphorus metering tank 10. The weight sensor 17 is connected to the distributed control system, and the weight of the yellow phosphorus metering tank 10 as a whole can be weighed through the weight sensor 17 and the weight information can be transmitted to the distributed control system.

[0048] Furthermore, this application employs a distributed control system for automatic control. After measuring the flow rate of the phosphorus-pressing liquid seal water using flow meter 24, the amount of liquid yellow phosphorus injected into the phosphorus combustion furnace 60 is calculated. The distributed control system automatically adjusts the amount of atomizing air from the compressed air storage tank to ensure the atomization effect of the yellow phosphorus. By measuring the flow rate of the phosphorus-pressing hot water, the amount of yellow phosphorus injected into the phosphorus combustion furnace is calculated, thereby determining the flow rate of phosphorus pentoxide produced during combustion. The distributed control system automatically adjusts the output frequency of the frequency converter of the circulating acid pump in the hydration tower 70 according to the required flow rate of absorbed phosphorus pentoxide, ensuring sufficient absorption of phosphorus pentoxide entering the hydration tower 70. The hydration tower 70 can also maintain normal production even under low load conditions by reducing the operating load of the circulating acid pump, thus saving operating costs.

[0049] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0050] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A safe and energy-saving production device for thermally produced yellow phosphoric acid, comprising a yellow phosphorus metering tank (10), a liquid-sealed water input component (20), and a yellow phosphorus output component (30), characterized in that, The number of yellow phosphorus metering tanks (10) is at least two. The liquid seal water input assembly (20) includes a liquid seal water input main pipe (21) and a plurality of liquid seal water input branch pipes (22) connected to the liquid seal water input main pipe (21). The liquid seal water input main pipe (21) is equipped with a flow meter (24). The liquid seal water input branch pipes (22) correspond one-to-one with the yellow phosphorus metering tanks (10) and are connected to the yellow phosphorus metering tanks (10). Each of the liquid seal water input branch pipes (22) is equipped with a liquid seal water input valve (23). The yellow phosphorus output assembly (30) includes a yellow phosphorus output main pipe (31) and a plurality of yellow phosphorus output branch pipes (32) connected to the yellow phosphorus output main pipe (31). Each yellow phosphorus output branch pipe (32) corresponds to and is connected to the yellow phosphorus metering tank (10). Each yellow phosphorus output branch pipe (32) is provided with a yellow phosphorus output valve (33). The height of the end of the yellow phosphorus output branch pipe (32) connected to the yellow phosphorus metering tank (10) is lower than the height of the end of the liquid seal water input branch pipe (22) connected to the yellow phosphorus metering tank (10).

2. The safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus furnace according to claim 1, characterized in that, It also includes a yellow phosphorus input assembly (40), which includes a yellow phosphorus input main pipe (41) and a plurality of yellow phosphorus input branch pipes (42) connected to the yellow phosphorus input main pipe (41). Each yellow phosphorus input branch pipe (42) corresponds to and is connected to the yellow phosphorus metering tank (10). Each of the yellow phosphorus input branch pipes (42) is provided with a yellow phosphorus input valve (43).

3. The safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus furnace according to claim 1, characterized in that, It also includes a liquid seal water overflow assembly (50), which includes a liquid seal water overflow main pipe (51) and a plurality of liquid seal water overflow branch pipes (52) connected to the liquid seal water overflow main pipe (51). The liquid seal water overflow branch pipes (52) correspond one-to-one with the yellow phosphorus metering tank (10) and are connected to the top of the yellow phosphorus metering tank (10). Each of the liquid seal water overflow branch pipes (52) is provided with a liquid seal water overflow valve (53).

4. The safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus furnace according to claim 1, characterized in that, The liquid-sealed water input assembly (20) also includes a hot water tank (25) and a liquid-sealed water input pipe (26), the liquid-sealed water input pipe (26) being connected to the hot water tank (25); the end of the liquid-sealed water input main pipe (21) away from the yellow phosphorus metering tank (10) is connected to the hot water tank (25), and the liquid-sealed water input main pipe (21) is equipped with a phosphorus-pressing water pump (27).

5. A safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus in a furnace according to claim 4, characterized in that, The hot water tank (25) is provided with a first steam inlet (29).

6. A safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus in a furnace according to claim 4, characterized in that, Both the liquid seal water inlet main pipe (21) and the liquid seal water inlet pipe (26) are equipped with flow regulating valves (28).

7. A safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus in a furnace according to claim 1, characterized in that, The yellow phosphorus metering tank (10) is provided with a heating outer liner (11) on the outside. The heating outer liner (11) and the yellow phosphorus metering tank (10) are connected to a heating chamber (12). The heating outer liner (11) has a second steam inlet (13) and a condensate outlet (18) that connect to the heating chamber (12).

8. A safe and energy-saving production device based on thermal phosphoric acid yellow phosphorus in a furnace according to claim 1, characterized in that, The yellow phosphorus metering tank (10) is equipped with a thermometer (14), a level gauge (15), and a pressure gauge (16).

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