A yellow phosphorus electric furnace gas electric heating device

Abstract

This application provides an electric heating device for yellow phosphorus electric furnace gas, including a heating device cylinder. The heating device cylinder includes a shell and an internal heating chamber. An air inlet is provided at the bottom of the shell, and an air outlet is provided on the side. Electric heating tubes are arranged along the height direction inside the heating chamber, and a first nozzle is provided inside the shell to spray nitrogen onto the electric heating tubes. By using the nitrogen blowing nozzle, dust adhering to the electric heating tubes can be cleaned in a timely manner, ensuring that the surface of the electric heating tubes remains clean, thereby ensuring the heating efficiency of the entire electric heating device. This device can heat the phosphorus furnace gas entering the electric heating device from the yellow phosphorus electric furnace to a set temperature, effectively preventing the condensation of phosphorus vapor in the phosphorus furnace gas to form phosphorus mud, creating conditions for subsequent dry dust removal of the furnace gas.

Description

Technical Field

[0001] This application relates to the field of yellow phosphorus electric furnace gas purification and dust removal technology, and more specifically, to an electric heating device for yellow phosphorus electric furnace gas. Background Technology

[0002] Currently, the main production process for yellow phosphorus electric furnaces in my country involves direct water spraying to condense and recover the furnace gas. During this process, dust in the furnace gas is simultaneously removed, resulting in a large amount of phosphorus mud. This phosphorus mud causes product loss and potential environmental pollution risks. With increasing national environmental regulations and increasingly stringent environmental standards in the yellow phosphorus industry, yellow phosphorus enterprises face enormous environmental pressure. One way to solve these problems is to separate the phosphorus recovery and dust removal processes, i.e., adding pre-dust removal equipment before the condensation tower, which will effectively reduce the generation of phosphorus mud.

[0003] Currently, wet dust removal is the most commonly used method. Dust removal can be done in two forms: wet and dry. Wet dust removal still produces mud and phosphorus. Dry dust removal commonly uses fiber filter media dust collectors. In the field of filter media, filter media are divided into four categories: medium and low temperature filter media (90-140℃), medium and high temperature filter media (140-200℃), high temperature filter media (200-300℃), and ultra-high temperature filter media (above 300℃). However, the temperature in the production conditions of yellow phosphorus is 180 degrees or above, so high temperature or ultra-high temperature filter media must be selected. These two types of filter media are expensive, which increases the production cost of yellow phosphorus. Utility Model Content

[0004] To address the aforementioned issues, this application provides an electric heating device for yellow phosphorus electric furnace gas, which solves the problems of mud phosphorus generated by wet dust removal and high costs of dry dust removal using fiber filter media in the existing yellow phosphorus production dust removal process.

[0005] This application provides an electric heating device for yellow phosphorus electric furnace gas, including an electric heating device cylinder. The electric heating device cylinder includes a shell and a heating chamber inside it. An air inlet is provided at the bottom of the shell and an air outlet is provided on the side. An electric heating tube is provided in the heating chamber along the height direction. A first nozzle is provided in the shell to spray the electric heating tube.

[0006] As an optional embodiment, multiple electric heating tubes are arranged in a circular array and evenly distributed within the heating cavity.

[0007] As an optional embodiment, multiple first nozzles are provided, which are distributed in a circular pattern on the inner wall of the housing, and the spray range of the multiple first nozzles covers all electric heating tubes.

[0008] As an optional embodiment, the first nozzle is a nitrogen nozzle.

[0009] As an optional embodiment, the top of the electric heating device cylinder is provided with a top wiring chamber and a power supply, and the top of the electric heating tube is connected to an electric heating tube terminal. The top of the electric heating tube terminal is located in the top wiring chamber and is powered by the power supply.

[0010] As an optional embodiment, a nitrogen pipe is provided at the top of the electric heating device cylinder to supply nitrogen to the top wiring chamber.

[0011] As an optional embodiment, a second nozzle is provided at the top of the heating chamber, and the spray range of the second nozzle covers all the electric heating tubes in the heating chamber.

[0012] As an optional embodiment, the second nozzle can be configured as one or more. When configured as one, it is installed at the top center of the heating chamber; when configured as multiple, the multiple second nozzles are distributed in a ring array along the top of the heating chamber.

[0013] As an optional embodiment, the second nozzle is a liquid nozzle.

[0014] As an optional embodiment, an air inlet temperature sensor, an air outlet temperature sensor, and a heating chamber temperature sensor are respectively installed in the air inlet, air outlet, and heating chamber.

[0015] This utility model discloses an electric heating device for yellow phosphorus electric furnace gas, comprising an electric heating device cylinder, which includes a shell and an internal heating chamber. An air inlet is located at the bottom of the shell, and an air outlet is located on the side. Electric heating tubes are arranged along the height direction inside the heating chamber. A first nozzle is located inside the shell to spray nitrogen onto the electric heating tubes. The nitrogen-blowing nozzles can promptly clean dust adhering to the electric heating tubes, ensuring the surface of the electric heating tubes remains clean and thus guaranteeing the heating efficiency of the entire electric heating device. This device can heat the phosphorus furnace gas entering the electric heating device from the yellow phosphorus electric furnace to a set temperature, effectively preventing the condensation of phosphorus vapor in the furnace gas to form phosphorus mud, thus creating conditions for subsequent dry dust removal of the furnace gas. Furthermore, it eliminates the need for expensive filter media, resulting in low cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a yellow phosphorus electric furnace gas electric heating device according to the present invention;

[0018] Figure 2This is a cross-sectional view at position A of the electric heating device for yellow phosphorus electric furnace gas according to the present invention.

[0019] Wherein: 1-Electric heating device, 2-Air inlet, 3-Electric heating tube, 4-First nozzle, 5-Heating chamber, 6-Housing, 7-Second nozzle, 8-Electric heating tube terminal, 9-Top wiring chamber, 10-Power supply, 11-Air outlet, 12-Air outlet temperature sensor, 13-Heating chamber temperature sensor, 14-Air inlet temperature sensor, 15-Nitrogen pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Currently, the wet dust removal process for yellow phosphorus furnace gas widely used in domestic production generates a large amount of phosphorus mud, which has high post-treatment costs, high energy consumption, and potential environmental risks. Therefore, the embodiment provided in this application performs dry dust removal before the furnace gas enters the condensation tower to collect the solid dust in the furnace gas, which is a new green and low-carbon technology process encouraged by the state. Using the solution provided by this utility model, the yellow phosphorus furnace gas can be heated to a set temperature to prevent the phosphorus vapor in the furnace gas from condensing, thus creating conditions for dry dust removal of the yellow phosphorus furnace gas.

[0022] like Figure 1 As shown in the embodiment of this application, an electric heating device for yellow phosphorus furnace gas is provided. The device heats the yellow phosphorus furnace gas through an electric heating tube, thereby effectively preventing the yellow phosphorus vapor from condensing below the dew point and creating conditions for subsequent dry dust removal of the yellow phosphorus furnace gas.

[0023] As is understandable, the gas dew point is the temperature at which the water vapor contained in a gas begins to condense into a liquid or solid state when the gas is cooled, and it is measured in degrees Celsius (°C). The dew point temperature directly reflects the moisture content of the gas.

[0024] This application provides an embodiment of a yellow phosphorus electric furnace gas electric heating device, see [link to relevant documentation]. Figure 1 The device includes an electric heating device cylinder 1, which includes a housing 6 and a heating chamber 5 inside it. The housing 6 has an air inlet 2 at the bottom and an air outlet 11 on the side. An electric heating tube 3 is arranged in the heating chamber 5 along the height direction. A first nozzle 4 is provided in the housing 6 to spray the electric heating tube 3.

[0025] In one embodiment of this application, the electric heating tubes 3 are configured as multiple tubes, which are evenly distributed in a circular array within the heating cavity 5.

[0026] In one embodiment of this application, the first nozzle 4 is configured as a plurality of nozzles, which are distributed in a circular pattern on the inner wall of the housing 6, and the spray range of the plurality of first nozzles 4 covers all electric heating tubes 3.

[0027] In one embodiment of this application, the first nozzle 4 is a nitrogen nozzle.

[0028] In one embodiment of this application, the top of the electric heating device cylinder 1 is provided with a top wiring chamber 9 and a power supply 10, the top of the electric heating tube 3 is connected to an electric heating tube terminal 8, the top of the electric heating tube terminal 8 is located in the top wiring chamber 9, and is powered by the power supply 10.

[0029] In one embodiment of this application, a nitrogen pipe 15 is provided at the top of the electric heating device cylinder 1 to supply nitrogen to the top wiring chamber 9.

[0030] In one embodiment of this application, a second nozzle 7 is provided at the top of the heating chamber 5, and the spray range of the second nozzle 7 covers all the electric heating tubes 3 in the heating chamber 5.

[0031] In one embodiment of this application, the second nozzle 7 is configured as one or more. When configured as one, it is installed at the top center of the heating chamber 5; when configured as multiple, the multiple second nozzles 7 are distributed in a ring array along the top of the heating chamber 5.

[0032] In one embodiment of this application, the second nozzle 7 is a liquid nozzle.

[0033] In one embodiment of this application, an air inlet temperature sensor 14, an air outlet temperature sensor 12, and a heating chamber temperature sensor 13 are respectively provided in the air inlet 2, the air outlet 11, and the heating chamber 5.

[0034] In one specific embodiment of this application, the electric heating device for yellow phosphorus electric furnace gas includes an electric heating device cylinder 1, an air inlet 2, an electric heating tube 3, a first nozzle 4, a heating chamber 5, a shell 6, a second nozzle 7, an electric heating tube terminal block 8, a top wiring chamber 9, a power supply 10, an air outlet 11, an air outlet temperature sensor 12, a heating chamber temperature sensor 13, an air inlet temperature sensor 14, and a nitrogen pipe 15.

[0035] See Figure 1 The electric heating tubes 3 are vertically arranged inside the heating chamber 5, and their diameter, length, and number are determined according to the flow rate of the furnace gas and the power of the electric heating tubes 3; for example, Figure 1 The diagram shows two cross-sectional locations, in Figure 2 Nine heating elements are shown in the sectional view. The number and arrangement are for illustrative purposes only and will be determined based on the actual yellow phosphorus electric furnace design. For example, the electric heating tube 3 is a U-shaped tube, and the positive and negative terminals are connected to the power supply 10 through the electric heating tube terminals 8 in the top wiring chamber 9.

[0036] The first nozzles 4 are evenly arranged on the inner circumference of the shell 6 of the electric heating device cylinder 1, and spray nitrogen gas onto the electric heating tube 3 in the heating chamber 5 along the circumference to remove dust adhering to the electric heating tube; wherein the pressure of the nitrogen gas supplied to the first nozzles 4 is not less than 0.2 MPa. For example, see Figure 1 , 2 Multiple first nozzles 4 can be arranged circumferentially. Figure 2 The illustration shows four, but other numbers are also possible; multiple layers can be arranged vertically. Figure 1 This is an illustration of 3 floors, but it could also be any other number.

[0037] The second nozzle 7 is installed at the top center of the heating chamber 5, and its spray range covers all the electric heating tubes 3 inside the heating chamber 5. The second nozzle 7 sprays water onto the electric heating tubes 3 below, covering all the electric heating tubes 3, and cleaning the dust, coal tar and other sticky deposits attached to the electric heating tubes 3. The pressure of the water source supplied by the second nozzle 7 is not less than 0.2 MPa.

[0038] The first nozzle 4 and the second nozzle 7 can be spiral nozzles, which can ensure atomization effect and have good adaptability to water quality, preventing clogging. Other nozzles with similar functions can also be selected.

[0039] In this application, the electric heating device cylinder 1 is divided into two independent parts: heating chamber 5 and top wiring chamber 9. The furnace gas is heated in the heating chamber 5, and the terminal of the electric heating tube 3 is located in the top wiring chamber 9, and is not affected by water spray or high temperature.

[0040] Furthermore, the top terminal 8 of the electric heating tube is located inside the top wiring chamber 9. Nitrogen gas is introduced into the top wiring chamber 9 during operation. The nitrogen gas introduction path is shown below. Figure 1 The arrow at position B ensures a slight positive pressure, providing nitrogen protection for the top wiring chamber 9.

[0041] The electric heating tube 3 is powered by a cable that connects the power supply 10 and the electric heating tube terminal 8. An external power supply is connected to the power supply 10 for power supply.

[0042] In this application, the furnace gas generated by the yellow phosphorus electric furnace enters the cylinder 1 of the electric heating device through the gas inlet 2. The furnace gas entry path is shown below. Figure 1The arrow at position C indicates that within the heating chamber 5 of the electric heating device cylinder 1, the furnace gas is heated to 180°C or above a specified temperature via the electric heating tube 3. The heated furnace gas then enters the next process through the gas outlet 11. The furnace gas discharge path is shown in [reference needed]. Figure 1 Arrow at position D. A specific application method provided in this application embodiment is as follows:

[0043] Step (1): Before powering on, nitrogen gas should be introduced into the top wiring chamber 9 through nitrogen pipe 15 for protection;

[0044] Step (2): Turn on the power, the electric heating tube 3 starts to heat up, the temperature inside the heating chamber 5 is detected by the heating chamber temperature sensor 13, and after heating to the set temperature, the air inlet 2 is opened to introduce furnace gas for heating.

[0045] Step (3): During the heating process, the temperature of the inlet and outlet furnace gas is monitored by the inlet temperature sensor 14 arranged at the inlet 2 and the outlet temperature sensor 12 arranged at the outlet 11. At the same time, the temperature inside the heating chamber 5 is detected by the heating chamber temperature sensor 13. The temperature values ​​at the three locations are fed back to the central control system. The overall power of the electric heating device cylinder 1 is adjusted by the control relationship preset by the central control system, thereby controlling the furnace gas temperature at the outlet 12 after heating.

[0046] Step (4): During the heating process, nitrogen gas is periodically sprayed into the electric heating tube 3 through the first nozzle 4 according to the set cycle to remove the dust attached to the electric heating tube 3. The pressure of the nitrogen gas provided to the first nozzle 4 is not less than 0.2 MPa.

[0047] Step (5): According to the system settings, after the set cycle, cut off the air inlet 2 and the power supply 10. After the heating chamber 5 detects that the temperature is below 50℃ (or other specified temperature) through the heating chamber temperature sensor 13, spray water onto the electric heating tube 3 through the second nozzle 7 to clean the dust, coal tar and other sticky deposits attached to the electric heating tube 3. The pressure of the water supply source for the second nozzle 7 is not less than 0.2MPa. Since the air inlet 2 is cut off when spraying water and the device is turned off until the temperature drops to the specified temperature, that is, the reaction inside the electric heating device cylinder 1 no longer occurs. Therefore, although a water spray structure is used for cleaning, it is isolated from the heating reaction and will not produce mud or phosphorus.

[0048] After cleaning, the air inlet 2 can be shut off and the process can be returned to step (2). The power supply 10 is turned on to heat the furnace. After the temperature is heated to the set temperature, the water will be evaporated. Then the air inlet 2 is opened and furnace gas is introduced for heating, thereby further preventing the formation of mud and phosphorus.

[0049] In this invention, the number of electric heating tubes can be flexibly configured according to the amount of yellow phosphorus furnace gas to heat the yellow phosphorus furnace gas to a set temperature.

[0050] In this invention, nitrogen gas nozzles are arranged inside the vertical housing of the electric heating device to promptly clean dust adhering to the electric heating tubes; water nozzles are arranged at the top of the electric heating device to promptly clean dust, coal tar, and other sticky substances adhering to the electric heating tubes; these two measures ensure that the surface of the electric heating tubes remains clean, thereby ensuring the heating efficiency of the entire electric heating device.

[0051] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A gas-electric heating device for a yellow phosphorus electric furnace, characterized in that, The device includes an electric heating device cylinder (1), which includes a shell (6) and a heating chamber (5) inside it. The shell (6) has an air inlet (2) at the bottom and an air outlet (11) on the side. An electric heating tube (3) is arranged in the heating chamber (5) along the height direction. A first nozzle (4) is arranged in the shell (6) to spray the electric heating tube (3).

2. The electric heating device for yellow phosphorus electric furnace gas according to claim 1, characterized in that, The electric heating tubes (3) are arranged in multiple units, forming a circular array evenly distributed within the heating cavity (5).

3. The electric heating device for yellow phosphorus electric furnace gas according to claim 2, characterized in that, The first nozzle (4) is configured as a plurality of them, which are distributed in a circular pattern on the inner wall of the housing (6), and the spray range of the plurality of first nozzles (4) covers all electric heating tubes (3).

4. The electric heating device for yellow phosphorus electric furnace gas according to claim 1, characterized in that, The first nozzle (4) is a nitrogen nozzle.

5. The electric heating device for yellow phosphorus electric furnace gas according to claim 1, characterized in that, The top of the electric heating device cylinder (1) is provided with a top wiring chamber (9) and a power supply (10). The top of the electric heating tube (3) is connected to an electric heating tube terminal (8). The top of the electric heating tube terminal (8) is located in the top wiring chamber (9) and is powered by the power supply (10).

6. The electric heating device for yellow phosphorus electric furnace gas according to claim 5, characterized in that, The top of the electric heating device cylinder (1) is equipped with a nitrogen pipe (15) to supply nitrogen to the top wiring chamber (9).

7. The electric heating device for yellow phosphorus electric furnace gas according to claim 1, characterized in that, A second nozzle (7) is provided at the top of the heating chamber (5), and the spray range of the second nozzle (7) covers all the electric heating tubes (3) in the heating chamber (5).

8. The electric heating device for yellow phosphorus electric furnace gas according to claim 7, characterized in that, The second nozzle (7) is configured as one or more. When configured as one, it is installed at the top center of the heating chamber (5); when configured as multiple, the multiple second nozzles (7) are distributed in a ring array along the top of the heating chamber (5).

9. The electric heating device for yellow phosphorus electric furnace gas according to claim 7, characterized in that, The second nozzle (7) is a liquid nozzle.

10. The electric heating device for yellow phosphorus electric furnace gas according to claim 1, characterized in that, An air inlet temperature sensor (14), an air outlet temperature sensor (12), and a heating chamber temperature sensor (13) are respectively installed in the air inlet (2), the air outlet (11), and the heating chamber (5).

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