CN111306948A - Yellow phosphorus electric furnace gas temperature control device, system and method - Google Patents

Abstract

The invention relates to a gas temperature control device for a yellow phosphorus electric furnace, a gas temperature control system for a yellow phosphorus electric furnace and a gas temperature control method for the yellow phosphorus electric furnace. The gas temperature control device of the yellow phosphorus electric furnace includes: a jacket tube, the jacket tube includes an inner tube and an insulating layer sheathed outside the inner tube, and the jacket tube is used for transmitting the furnace gas output from the yellow phosphorus electric furnace to the yellow phosphorus electric furnace. In the dry dust collector in the furnace gas dry dust removal system of the phosphorus electric furnace; the heat preservation medium circulation line, the heat preservation medium circulation line is connected with the heat preservation layer, and the heat preservation medium circulation line is provided with the heat preservation medium for making the heat preservation medium in the heat preservation layer and the heat preservation medium. The heat preservation medium driving device circulating between the circulation pipes and the heat tracing heater used to control the temperature of the heat preservation medium; the heat preservation medium circulation line is provided with a valve. By arranging the above-mentioned yellow phosphorus electric furnace gas temperature control device, the yellow phosphorus vapor in the furnace gas is prevented from being phase-transformed and precipitated during the gas conduction process.

Description

Yellow phosphorus electric furnace gas temperature control device, system and method

technical field

The invention relates to a gas temperature control device for a yellow phosphorus electric furnace, a gas temperature control system for a yellow phosphorus electric furnace and a gas temperature control method for the yellow phosphorus electric furnace.

Background technique

At present, the production process of electrothermal yellow phosphorus is to wet the yellow phosphorus furnace gas containing dust, phosphorus steam and coal gas with a scrubber for wet dust removal and yellow phosphorus condensation. The crude phosphorus obtained by condensation needs to be refined to obtain qualified yellow phosphorus. In view of the existing electrothermal yellow phosphorus production process, the electrothermal yellow phosphorus electrostatic precipitator production process is that the yellow phosphorus furnace gas containing dust, phosphorus steam and gas from the yellow phosphorus electric furnace uses electrostatic precipitator to remove most of the dust in the furnace gas. To remove and reduce the furnace gas dust, a scrubber is used for wet dust removal and yellow phosphorus condensation. The crude phosphorus obtained by condensation needs to be refined to obtain qualified yellow phosphorus. However, during the current dedusting process, the yellow phosphorus furnace gas may undergo a phase change due to heat loss, resulting in damage to the dedusting equipment or subsequent equipment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a yellow phosphorus electric furnace gas temperature control device for preventing the phase change of the furnace gas in the process of conveying and dedusting the yellow phosphorus electric furnace gas.

In order to achieve the above purpose, the technical solution adopted in the present application is a yellow phosphorus electric furnace gas temperature control device, which is configured in a yellow phosphorus electric furnace gas dry dust removal system, and is used to control the temperature of the conveying furnace gas. The above-mentioned yellow phosphorus electric furnace gas The temperature control device includes:

A jacketed tube, the jacketed tube includes an inner tube and an insulating layer sheathed outside the inner tube, and the jacketed tube is used for feeding the furnace gas output from the yellow phosphorus electric furnace into the furnace gas of the yellow phosphorus electric furnace gas dry dust removal system. In dry dust collectors;

The heat preservation medium circulation pipeline, the heat preservation medium circulation line is communicated with the above-mentioned heat preservation layer, and the heat preservation medium driving device and the device for circulating the heat preservation medium between the heat preservation layer and the heat preservation medium circulation line are arranged on the above heat preservation medium circulation line. It is a heat tracing heater used to control the temperature of the heat preservation medium; a valve is provided on the above-mentioned heat preservation medium circulation pipeline.

By setting the above-mentioned yellow phosphorus electric furnace gas temperature control device, the furnace gas output from the yellow phosphorus electric furnace is transported to the dry dust collector through the inner pipe of the jacket tube for dust removal, wherein, during the transportation process, the inner pipe circulates outside The thermal insulation medium in the thermal insulation layer (controlling the temperature of the thermal insulation medium) keeps the furnace gas in the inner tube insulated to prevent the precipitation of yellow phosphorus vapor and other phase changes in the furnace gas during the gas conduction process. The road temperature control is carried out with the circulating thermal insulation medium as the carrier, and the jacket method is used to meet the requirements of the temperature control facilities for the high temperature of the electric furnace gas under individual conditions.

Further, the above-mentioned jacket tube includes a precipitator jacket used for covering or wrapping the dry-process precipitator for the circulation of the thermal insulation medium, the precipitator jacket is communicated with the thermal insulation layer, and the above-mentioned dust collector jacket, thermal insulation layer. It forms a loop with the heat preservation medium circulation pipeline.

In this way, by setting the above-mentioned dust collector jacket, the furnace gas can maintain a stable temperature during the whole process of conveying and dedusting, so as to prevent the precipitation of yellow phosphorus vapor and other phase changes in the furnace gas. The dust collector jacket here is provided with at least one inlet and outlet.

Further, the above-mentioned jacket tube includes at least two sections, which are respectively connected to the inlet end and the outlet end of the dry dust collector; each section of the above-mentioned jacket tube is provided with an inlet and an outlet that are communicated with the heat preservation medium circulation pipeline, and each section is The above-mentioned jacketed pipe units all form a loop with the heat preservation medium circulation pipeline.

Further, the above-mentioned jacket tube is provided with an electric heating device located at the inlet end of the dry precipitator.

Further, the above-mentioned jacket tube includes a first section, a second section and a third section, the above-mentioned first section is connected to the inlet of the electric heating device, and the two ends of the above-mentioned second section are respectively connected to the outlet of the electric heating device and the dry section. The inlet of the dust collector, and the above-mentioned third section is connected to the outlet of the dry dust collector.

Further, the above-mentioned thermal insulation medium circulation pipeline includes a first pipeline, and the two ends of the inlet and outlet of the first pipeline are respectively connected with the thermal insulation layer of the first section to form a loop; A precipitator jacket used for the circulation of thermal insulation medium in a dust collector; the first pipeline is provided with a first branch directly connected to the deduster jacket, and the outlet of the deduster jacket is directly connected to the first pipe through the output branch. road connection.

Further, the above-mentioned first branch is also communicated with the thermal insulation layer of the second stage and the thermal insulation layer of the third stage, respectively.

The yellow phosphorus electric furnace gas temperature control system includes a yellow phosphorus electric furnace and a dry dust collector, the above-mentioned yellow phosphorus electric furnace gas temperature control system also includes the above-mentioned yellow phosphorus electric furnace gas temperature control device, and the above-mentioned yellow phosphorus electric furnace passes through the yellow phosphorus electric furnace. The jacketed tube of the air temperature control device is communicated with the dry dust collector.

The gas temperature control method for a yellow phosphorus electric furnace includes the following steps:

Insulate the furnace gas output from the yellow phosphorus electric furnace to ensure that the furnace gas does not drop in temperature;

The furnace gas after heat preservation is heated to keep the furnace gas above 20 °C, and the furnace gas is kept in the state of unsaturated steam; the furnace gas that is in the state of unsaturated steam and above 20 °C is kept warm to ensure that the furnace gas does not drop in temperature;

Dry dedusting the furnace gas and use a jacket with an internal circulation insulation medium outside the dry dust collector to keep the furnace gas warm;

The furnace gas after dust removal is kept warm to ensure that the furnace gas does not drop in temperature and the furnace gas is discharged.

Specifically, when conveying furnace gas, the above-mentioned heat preservation is carried out by setting a jacket tube on the conveying channel, and setting a heat preservation medium that is circulated to the heat preservation layer in the jacket tube for heat preservation.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will, in part, be set forth in, and will become apparent from, the following description. or learned through the practice of the present invention.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to assist the understanding of the present invention, and the content provided in the drawings and their related descriptions in the present invention can be used to explain the present invention, but do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is a schematic diagram for explaining the gas temperature control system of this yellow phosphorus electric furnace;

Labels in the figure: yellow phosphorus electric furnace 1, jacket tube 2, first section 201 of jacket tube, second section 202 of jacket tube, third section 203 of jacket tube, inner tube 210, insulation layer 220, dust removal 221, electric heating device 3, dry dust collector 4, power fan 5, heat preservation medium circulation pipeline 6, first pipeline 601, second pipeline 602, third pipeline 603, bypass pipe 604, first pipeline 601 A branch 605 , a second branch 606 , a heat tracing circulating fan 610 , and a heat tracing heater 620 .

Detailed ways

The present invention will be clearly and completely described below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before the present invention is described in conjunction with the accompanying drawings, it should be particularly pointed out that:

The technical solutions and technical features provided in the various parts including the following description in the present invention can be combined with each other under the condition of no conflict.

In addition, the embodiments of the present invention referred to in the following description are generally only a part of the embodiments of the present invention, not all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Regarding the terms and units in the present invention. The term "comprising" and any variations thereof in the description and claims of the present invention and related parts are intended to cover the non-exclusive inclusion.

This embodiment adopts a gas temperature control method for a yellow phosphorus electric furnace, comprising the following steps:

The furnace gas output from the yellow phosphorus electric furnace 1 is kept warm to ensure that the furnace gas does not drop in temperature; here, the method of jacket tube 2 is used to keep the conveyed furnace gas warm;

Use the insulating layer of the jacketed tube 2 to heat up the heat-insulated furnace gas to keep the furnace gas above 20°C and keep the furnace gas in the state of unsaturated steam; Insulation to ensure that the furnace gas does not drop in temperature;

Dry dust removal is carried out on the furnace gas, and a jacket with an internal circulation insulation medium is arranged outside the dry dust collector 4 to keep the furnace gas warm;

The furnace gas after dust removal is kept warm to ensure that the furnace gas does not drop in temperature and the furnace gas is discharged.

As shown in Figure 1, the yellow phosphorus electric furnace gas temperature control device is configured in the yellow phosphorus electric furnace gas dry dust removal system to control the temperature of the conveying furnace gas. The above-mentioned yellow phosphorus electric furnace gas temperature control device includes:

Jacketed tube 2, the jacketed tube 2 includes an inner tube 210 and an insulating layer 220 sleeved outside the inner tube 210, and the jacketed tube 2 is used to transmit the furnace gas output from the yellow phosphorus electric furnace 1 to the yellow phosphorus electric furnace 1 in the dry dust collector 4 in the furnace gas dry dust removal system;

The thermal insulation medium circulation pipeline 6 is in communication with the above-mentioned thermal insulation layer 220. The thermal insulation medium circulating pipeline 6 is provided with a circuit for circulating the thermal insulation medium between the thermal insulation layer 220 and the thermal insulation medium circulating pipeline 6. The heat preservation medium driving device and the heat tracing heater 620 used to control the temperature of the heat preservation medium; the above heat preservation medium circulation pipeline 6 is provided with a valve. The heat preservation medium here can be nitrogen, and the drive device of the heat preservation medium is the heat tracing circulating fan 610 .

In the implementation, it is used in the gas temperature control system of the yellow phosphorus electric furnace, that is, this yellow phosphorus electric furnace gas temperature control system includes the yellow phosphorus electric furnace 1 and the dry dust collector 4, and the above-mentioned yellow phosphorus electric furnace gas temperature control system also includes the above-mentioned The yellow phosphorus electric furnace gas temperature control device, the above-mentioned yellow phosphorus electric furnace 1 is communicated with the dry dust collector 4 through the jacket tube 2 of the yellow phosphorus electric furnace gas temperature control device.

After the furnace gas is output from the yellow phosphorus electric furnace 1, it enters the above-mentioned jacket tube 2, and the furnace gas is transported from the inner pipe 210 in the jacket tube 2 to the dry dust collector 4 for dust removal, and the furnace gas enters the dry process dust collector 4 for filtration. Afterwards, it is discharged by the power fan 5, wherein the heat preservation medium circulation line 6 transports the heat preservation medium to the above-mentioned heat preservation layer 220 under the heating of the heat tracing heater 620, and the heat preservation medium is between the heat preservation layer 220 and the heat preservation medium circulation line 6. The circulating flow ensures that the conveying temperature of the furnace gas is within the preset range. To prevent the phase change and precipitation of yellow phosphorus vapor in the furnace gas during the gas conduction process, at the same time, the temperature of the heat preservation medium circulation pipeline 6 is used to control the temperature, and the circulating heat preservation medium is used as the carrier, and the jacket method is used to adapt to the electric furnace under individual conditions. The ultra-high furnace gas temperature requires the temperature resistance of the temperature control facilities.

The jacket tube 2 includes a precipitator jacket 221 for covering or wrapping the dry-process precipitator 4 and used for the circulation of the thermal insulation medium. The precipitator jacket 221 is communicated with the thermal insulation layer 220. The layer 220 and the heat preservation medium circulation line 6 form a loop. Here, the dust collector jacket 221 can be provided with an inlet and an outlet, the inlet can be the first branch 605 described below, and the outlet can be communicated with the bypass pipe 604 described below.

In this way, by arranging the above-mentioned dust collector jacket 221, the furnace gas can maintain a stable temperature during the whole process of conveying and dedusting, so as to prevent the precipitation of yellow phosphorus vapor and other phase changes in the furnace gas.

The above-mentioned jacketed tube 2 includes at least two sections, which are respectively connected to the inlet end and the outlet end of the dry dust collector 4; each section of the above-mentioned jacketed tube 2 is provided with an inlet and an outlet communicated with the thermal insulation medium circulation pipeline 6, and each section is The above-mentioned jacketed pipe 2 units all form a loop with the heat preservation medium circulation pipeline 6 .

In this way, the jacket tube 2 is arranged in multiple sections, and each section has an inlet and an outlet that communicate with the heat preservation medium circulation pipeline 6, so as to ensure that the furnace gas will not be transported due to a long distance and cause a large temperature difference of the heat preservation medium during the conveying process. .

The above-mentioned jacket tube 2 is provided with an electric heating device 3 located at the inlet end of the dry dust collector 4 . The installation of the electric heating device 3 means that the furnace gas is kept warm by direct heating, and the direct heat preservation and the indirect heat preservation through the jacket tube 2 are used for heat preservation work together, and the operation is more flexible. That is, whether to control the temperature or increase the temperature of the furnace gas, a targeted and differentiated process plan can be carried out according to the process requirements and functional settings. That is, the temperature parameters are set according to the dew point temperature of the furnace gas, and the dew point temperature can be 30-70°C.

The above-mentioned jacket tube 2 includes a first section 201, a second section 202 and a third section 203. The above-mentioned first section 201 is connected to the inlet of the electric heating device 3, and both ends of the above-mentioned second section 202 are respectively connected to the electric heating device 3. The outlet of the dry dust collector 4 and the inlet of the dry dust collector 4 , and the third section 203 is connected to the outlet of the dry dust collector 4 .

The above-mentioned thermal insulation medium circulation pipeline 6 includes a first pipeline 601, and the inlet and outlet ends of the first pipeline 601 are respectively connected with the thermal insulation layer 220 of the first section 201 to form a loop; The dust collector jacket 221 used for the circulation of the thermal insulation medium of the dry dust collector 4; the above-mentioned first pipeline 601 is provided with a first branch 605 that directly communicates with the dust collector jacket 221, and the outlet of the above-mentioned dust collector jacket 221 is provided It is directly communicated with the first pipeline 601 through the output branch 605 .

The heat preservation medium circulation pipeline 6 also includes a second pipeline 602 and a third pipeline 603. The inlet of the second pipeline 602 is connected to the third section 203, and the outlet of the second pipeline 602 is connected to the second section 202. The inlet of the third pipeline 603 is connected to the second section 202 , and the outlet of the third pipeline 603 is connected to the third section 203 . The third pipeline 603 is further provided with a bypass pipe 604 , and the bypass pipe 604 is connected with the third section 203 .

In this way, the insulation layers of the second section 202 and the third section 203 may have inlets and outlets that communicate with the insulation medium circulation pipeline 6, and the insulation layers of the second section 202 and the third section 203 are also directly connected to each other, which ensures the insulation layer. Equilibrium of nitrogen temperature within. The third section 203 is provided with a second branch 606 directly connected to the first pipeline 601 , so that the thermal insulation medium or nitrogen at the end of the third section 203 can directly return to the first pipeline 601 and continue to pass through the heat tracing heater 620 heating.

The first branch 605 is further communicated with the thermal insulation layer 220 of the second section 202 and the thermal insulation layer 220 of the third section 203, respectively.

Specifically, when conveying furnace gas, the above-mentioned heat preservation is carried out by disposing a jacket tube 2 on the conveying passage and conveying a circulating heat preservation medium to the heat insulating layer 220 in the jacket tube 2 for heat preservation.

The content of the present invention has been described above. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Based on the above content of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Claims (10)

1. Yellow phosphorus electric furnace burner gas temperature regulating device disposes in yellow phosphorus electric furnace burner gas dry dedusting system for control the temperature to conveying burner gas, its characterized in that, yellow phosphorus electric furnace burner gas temperature regulating device includes:

the device comprises a jacketed pipe (2), wherein the jacketed pipe (2) comprises an inner pipe (210) and a heat insulation layer (220) sleeved outside the inner pipe (210), and the jacketed pipe (2) is used for conveying furnace gas output from the yellow phosphorus electric furnace (1) into a dry dust collector (4) in a furnace gas dry dust collection system of the yellow phosphorus electric furnace;

the heat preservation medium circulation pipeline (6), the heat preservation medium circulation pipeline (6) is communicated with the heat preservation layer (220), and the heat preservation medium circulation pipeline (6) is provided with a heat preservation medium driving device and a heat tracing heater (620) (620) for controlling the temperature of the heat preservation medium, wherein the heat preservation medium driving device is used for enabling the heat preservation medium to circularly flow between the heat preservation layer (220) and the heat preservation medium circulation pipeline (6); and a valve is arranged on the heat preservation medium circulating pipeline (6).

2. The furnace gas temperature control device of the yellow phosphorus electric furnace according to claim 1, wherein the jacketed pipe (2) comprises a dust collector jacket (221) for circulation of a heat preservation medium for sheathing or wrapping the dry dust collector (4), the dust collector jacket (221) is communicated with the heat preservation layer (220), and the dust collector jacket (221), the heat preservation layer (220) and the heat preservation medium circulation pipeline (6) form a loop.

3. The furnace gas temperature control device of the yellow phosphorus electric furnace according to claim 1, wherein the jacketed pipe (2) comprises at least two sections which are respectively communicated with the inlet end and the outlet end of the dry dust collector (4); an inlet and an outlet which are communicated with a heat preservation medium circulation pipeline (6) are arranged on each section of the jacket pipe (2), and a loop is formed by each section of the jacket pipe (2) unit and the heat preservation medium circulation pipeline (6).

4. The furnace gas temperature control device of the yellow phosphorus electric furnace according to claim 1, characterized in that the jacketed pipe (2) is provided with an electric heating device (3) at the inlet end of the dry dust collector (4).

5. The furnace gas temperature control device of the yellow phosphorus electric furnace according to claim 4, characterized in that the jacketed pipe (2) comprises a first section (201), a second section (202) and a third section (203), wherein the first section (201) is communicated with an inlet of the electric heating device (3), two ends of the second section (202) are respectively communicated with an outlet of the electric heating device (3) and an inlet of the dry dust collector (4), and the third section (203) is communicated with an outlet of the dry dust collector (4).

6. The furnace gas temperature control device of the yellow phosphorus electric furnace according to claim 5, wherein the heat preservation medium circulation pipeline (6) comprises a first pipeline, and the inlet and outlet ends of the first pipeline are respectively communicated with the heat preservation layer (220) of the first section (201) to form a loop; the jacketed pipe (2) comprises a dust collector jacket (221) for sleeving or wrapping the dry dust collector (4) and used for circulating a heat preservation medium; the first pipeline is provided with a first branch which is directly communicated with the dust remover jacket (221), and an outlet of the dust remover jacket (221) is directly communicated with the first pipeline through the first branch.

7. The furnace gas temperature control device of the yellow phosphorus electric furnace according to claim 6, wherein the first branch is further communicated with the insulating layer (220) of the second section (202) and the insulating layer (220) of the third section (203), respectively.

8. The furnace gas temperature control system of the yellow phosphorus electric furnace comprises the yellow phosphorus electric furnace (1) and the dry dust collector (4), and is characterized by further comprising the furnace gas temperature control device of the yellow phosphorus electric furnace according to any one of claims 1 to 6, wherein the yellow phosphorus electric furnace (1) is communicated with the dry dust collector (4) through a jacket pipe (2) of the furnace gas temperature control device of the yellow phosphorus electric furnace.

9. The temperature control method of furnace gas of the yellow phosphorus electric furnace is characterized by comprising the following steps:

the furnace gas output from the yellow phosphorus electric furnace (1) is insulated, so that the temperature drop of the furnace gas is avoided;

heating the furnace gas after heat preservation to enable the temperature of the furnace gas to be above 20 ℃, and keeping the furnace gas in an unsaturated steam state; the furnace gas at the temperature of more than 20 ℃ in the unsaturated steam state is subjected to heat preservation, so that the temperature drop of the furnace gas is avoided;

performing dry dust removal on the furnace gas and preserving the heat of the furnace gas by arranging a jacket which is internally circulated with a heat preservation medium outside the dry dust remover (4);

and preserving the heat of the furnace gas after dust removal to ensure that the temperature of the furnace gas does not drop and the furnace gas is discharged.

10. The furnace gas temperature control method of the yellow phosphorus electric furnace according to claim 9, characterized in that the heat preservation is carried out by arranging the jacketed pipe (2) on the conveying passage and conveying a circulating heat preservation medium to the heat preservation layer (220) in the jacketed pipe (2) during the conveying of the furnace gas.

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