CN214148875U

CN214148875U - External compressed air supply type pot-type calcining furnace temperature control system

Info

Publication number: CN214148875U
Application number: CN202022913659.XU
Authority: CN
Inventors: 陈景顺; 陈景民
Original assignee: Zhengzhou Chengkai Kiln Technology Co ltd
Current assignee: Zhengzhou Chengkai Kiln Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-09-07
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses an external compressed air supply type pot-type calcining furnace temperature control system, which comprises a compressed air supply device and a temperature control device, wherein the temperature control device comprises a control valve element, a temperature measurement element and a control cabinet, a pipeline at the air outlet side of the control valve element extends into a temperature adjusting port of a flame path, and a spray head assembly is arranged at the end of the pipeline positioned in the temperature adjusting port; the temperature measuring element is arranged at the fire path of the calcining furnace and used for acquiring the temperature of the fire path and sending data to the control cabinet; the control valve element is used for adjusting the air inflow of the compressed air according to the instruction of the control cabinet, a pressure reducing valve is arranged at the outlet end of the compressed air supply device, and the outlet end of the pressure reducing valve is connected with an air inlet side pipeline of the control valve element; the temperature regulation of the system is not influenced by the total negative pressure of the furnace body, and is more stable and reliable; because the gas in the flame path at the lower flame port is rotary, the temperature in the flame path can be more uniform, the generation of nitrogen oxides is reduced, and the environmental protection pressure and the denitration cost are reduced.

Description

External compressed air supply type pot-type calcining furnace temperature control system

Technical Field

The utility model belongs to the technical field of forge burning furnace accuse temperature, concretely relates to burning furnace temperature control system is forged to external compressed air formula pot-type.

Background

The traditional automatic temperature regulating device of the aluminum carbon calciner mainly realizes temperature regulation by sucking cold air by the negative pressure of the calciner, and the temperature regulating mode has the following defects: on the one hand, the negative pressure of the calciner is not constant and is often changed, which affects the stability and reliability of the thermostat. For example, the negative pressure of the calciner needs to be correspondingly adjusted for increasing and reducing the output, and sometimes the negative pressure needs to be changed and suspended for overhauling and cleaning volatile channels. At this time, if the conventional automatic temperature adjusting device of the type of sucking cold air by using negative pressure cannot work normally. Therefore, the automatic temperature adjusting mode operated at present is not widely popularized. On the other hand, in the combustion system of the traditional furnace body, volatile components, combustion-supporting preheated air and temperature-adjusting cold air are all drawn into the flame path for combustion by the aid of the negative pressure fan, and the process of stirring and mixing is omitted, so that the temperature at the flame path lower flame opening is not uniform enough. At local temperatures above 1500 c, the nitrogen oxide increases exponentially with increasing temperature if the temperature is higher. The normal temperature of the first flame path is between 1200-1300 ℃, the local temperature of the central area of the flame burning at the lower burner port is often more than 1500 ℃, and the high temperature of the area is the main reason of exceeding the standard of oxynitride.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that exists on the above-mentioned prior art, the utility model provides an external compressed air formula pot-type calciner temperature control system supplies is provided, the single fire channel temperature adjustment and negative pressure unhook have been considered to this device, be provided with the device that the air current stirring mixes in addition, give down rotatory driving force of gas in burner combustion area region in the accuse temperature, let down the rotatory play of gas in the burner combustion area, let volatile and air quick homogeneous mixing, let the diffuse grow in flame combustion area, the local high temperature in flame area has just so been reduced, reduction oxynitrides's that can be great production. In addition, the rotating airflow in the flame path can also increase the heat absorption effect of the charging bucket.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the temperature control system of the external compressed air supply type pot calciner comprises a compressed air supply device and a temperature control device, wherein the temperature control device comprises a control valve element, a temperature measurement element and a control cabinet, a pipeline at the air outlet side of the control valve element extends into a temperature adjusting port of a fire path of the calciner, and a spray head assembly is arranged at the tail end of a pipeline positioned in the temperature adjusting port; the temperature measuring element is arranged at the fire path of the calcining furnace and used for acquiring the temperature of the fire path and sending data to the control cabinet; the control valve element is used for adjusting the air inflow of the compressed air according to the instruction of the control cabinet, a pressure reducing valve is arranged at the outlet end of the compressed air supply device, and the outlet end of the pressure reducing valve is connected with an air inlet side pipeline of the control valve element; the sprayer assembly comprises a sprayer connecting pipe, a sprayer sleeve pipe and a cyclone part, the sprayer connecting pipe and the sprayer sleeve pipe are both of tubular structures, two ports of the sprayer sleeve pipe are respectively and fixedly connected with the sprayer connecting pipe and the cyclone part, the ends of the sprayer connecting pipe and the cyclone part are embedded in the sprayer connecting pipe, and a gas distribution chamber is formed between the sprayer connecting pipe and the cyclone part; the air inlet end of the spray head connecting pipe is connected with the control valve element through a pipeline, more than two air passages are arranged on the cyclone part, and air flow is mixed and spins on the exhaust side of the air passages.

According to the scheme, the cyclone part is of a cylindrical structure integrally, more than two spiral groove-shaped air passages are formed in the outer cylindrical surface of the cyclone part, and air inlets and air outlets of the air passages are symmetrically distributed along the central axis of the cyclone part.

According to the further improved scheme, the length of the cyclone part is smaller than that of the nozzle sleeve, and the cyclone part is integrally arranged in the nozzle sleeve.

According to the scheme, 2-4 air passages are arranged.

According to the scheme, the cyclone unit is integrally of a cylinder structure, more than 2 inclined hole-shaped air passages are arranged in the length direction of the cylinder of the cyclone unit, and the air passages are integrally inclined at equal angles in the same counterclockwise or clockwise direction.

According to the scheme, one end of the cyclone part is embedded in the nozzle sleeve, and the other end of the cyclone part extends out of the nozzle sleeve.

According to the scheme, 2-4 air passages are arranged.

According to the scheme, the control valve element comprises an electric control valve and a manual valve located in a bypass of the electric control valve.

This scheme is further improved, temperature regulation port department is provided with the air door arm-tie, the air door arm-tie is made for transparent material.

Advantageous effects

1. This device has improved the mode of admitting air of compressed cold air through the innovation, and the device's principle utilizes plus compressed cold air to lower the temperature to the flame path to realize intelligent temperature regulation under the control of switch board. The compressed air sprayed by the spray head component forms a self-rotating airflow, and gives a rotating driving force to the gas in the lower flame port combustion area while controlling the temperature, so that the gas in the flame path at the lower flame port is rotated, the volatile component and the air are quickly and uniformly mixed, and further the flame combustion area is dispersed and enlarged, thereby reducing the local high temperature of the flame area and greatly reducing the generation of oxynitride. In addition, the rotating airflow in the flame path can also increase the heat absorption effect of the charging bucket. Compared with the traditional intelligent temperature regulation, the temperature regulation mode is more reliable, because the temperature regulation mode is not influenced by negative pressure change, the generated nitrogen oxides can be reduced, the overhigh temperature of a local area is avoided, and the manufacturing cost of the device is correspondingly low.

2. The device considers that the temperature control system is convenient to adjust, and a pressure reducing valve, an electric control valve and a manual valve are arranged on the compressed air pipeline. The manual valve is used for assisting, and when the electric control valve fails, the manual valve can be opened for manually adjusting the temperature. The electric control valve can control the air input by two modes of an electric control valve controlled by a switching value and a proportional valve controlled by an analog value. The compressed air pipeline enters the cold air door through the control valve, the pipeline is fixed on the cold air door, and the cold air is sprayed into the combustion flame path through the spray head. Meanwhile, the air door pulling plate can be made of transparent materials such as glass and the like, so that the combustion condition in the flame path can be observed conveniently.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a structural diagram of a temperature control system of a calcining furnace of the utility model;

FIG. 2 is a structural diagram of the temperature adjusting port of the present invention;

FIG. 3 is a schematic view of the nozzle assembly of the present invention; a spiral groove-shaped air passage;

FIG. 4 is a view showing the structure of the cyclone unit of the present invention; a spiral groove-shaped air passage;

FIG. 5 is a diagram of the distribution of the air inlets of the middle air passage according to the present invention; a spiral groove shape;

FIG. 6 is a schematic view of a showerhead assembly of the present invention; an inclined hole-shaped air passage;

FIG. 7 is a diagram of the distribution of the air inlets of the middle air passage according to the present invention; an inclined hole-shaped air passage;

FIG. 8 is a cross-sectional view taken at A-A of FIG. 7;

FIG. 9 is a structural diagram of the layout of the air passage in clockwise skew direction according to the present invention; an inclined hole-shaped air passage;

FIG. 10 is a schematic diagram of the layout of the air passages in the counter-clockwise direction of the present invention; an inclined hole-shaped air passage;

FIG. 11 is a schematic diagram of the temperature control according to the present invention;

the labels in the figure are: 1. the device comprises a compressed air supply device, 2, a pressure reducing valve, 3, a temperature control device, 3-1, a control valve element, 311, an electric control valve, 312, a manual valve, 3-2, a temperature measuring element, 3-3, a control cabinet, 3-4, a nozzle assembly, 341, a nozzle connecting pipe, 342, a nozzle sleeve, 343, a cyclone part, 3431, an air passage, 4, a temperature adjusting port, 5 and an air door pulling plate.

Detailed Description

In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Example 1

As shown in the figure: this embodiment provides an external compressed air formula pot-type calciner temperature control system that supplies, including compressed air feeder 1 and temperature regulating device 3, temperature regulating device 3 includes: the device comprises a control valve element 3-1, a temperature measuring element 3-2 and a control cabinet 3-3, wherein a pressure reducing valve 2 is arranged at the outlet end of a compressed air supply device 1, the outlet end of the pressure reducing valve 2 is connected with an air inlet side pipeline of the control valve element 3-1, the air outlet side pipeline of the control valve element 3-1 extends into the inner side of a temperature adjusting port 4 of a flame path, and a spray head assembly 3-4 is arranged at the tail end of the pipeline positioned in the temperature adjusting port 4; the temperature measuring element 3-2 is arranged at the fire path of the calcining furnace and used for acquiring the temperature of the fire path and sending data to the control cabinet 3-3; according to the instruction of the control cabinet 3-3, the control valve element 3-1 adjusts the air inflow of the compressed air. The control valve element 3-1 comprises an electric control valve 311 and a manual valve 312 by-passing the electric control valve 311. An air door pulling plate 5 is arranged at the temperature adjusting port 4, and the air door pulling plate 5 is made of transparent materials.

In the scheme, a specific layout of a system schematic diagram is shown in the figure, the currently used calcining furnace is provided with four material tanks as a group, the number of the material tanks of the practically applied calcining furnace is n groups, and n is an integer. The simplest calciner is only a set of four buckets. The scheme takes the simplest group of four buckets as an example to briefly describe the system. The system comprises a compressed air supply device 1, a pressure reducing valve 2, a regulating port 4, a control valve element 3-1, a temperature measuring element 3-2 and a control cabinet 3-3. At present, each calcining workshop for the carbon for the aluminum is provided with a compressed air supply device 1 which is used for cleaning volatile components and is directly connected to a control system. If not, the compressed air supply device 1 may be added. The pressure reducing valve 2 is used to adjust the pressure of the compressed air to a suitable range.

The temperature adjusting port 4, namely an air door, is a fixing device entering the furnace body, and the upper side of the temperature adjusting port is provided with a spray head component 3-4 through which compressed air enters a flame path of the furnace body. The compressed air pipeline enters the cold air door through the control valve, and the pipeline is fixed on the cold air door. The cold air is sprayed into the combustion flue through the spray head. The damper pull plate 5 is preferably made of glass, so that the combustion in the flame path can be observed conveniently.

The electric control valve 311 can adopt two modes of an electromagnetic valve and an electric proportional valve, and the manual valve 312 plays an auxiliary role. For example, when the electric control valve 311 fails, the manual valve 312 can be opened to manually adjust the temperature. The electric control valve 311 can control the air input by using an electric control valve controlled by a switching value and a proportional valve controlled by an analog value, and is an element for controlling the size of the air input. The temperature measuring element 3-2 is the basis of temperature control, and transmits a signal to the control cabinet 3-3, and the control cabinet 3-3 sends an instruction to control the electric control valve 311 to realize temperature regulation. The control cabinet 3-3 is a control unit of the whole device and can adopt a traditional automatic control system or an internet of things control mode.

In order to better ensure the combustion effect of a furnace body and enable compressed air entering the furnace body to push gas in a lower fire hole combustion area to rotate, two compressed air nozzles are designed. One is a built-in spiral groove type spray head, and the other is a rotary inclined orifice plate type spray head.

The nozzle assembly 3-4 comprises a nozzle connecting pipe 341, a nozzle sleeve 342 and a cyclone part 343, the nozzle connecting pipe 341 and the nozzle sleeve 342 are both tubular structures, two ports of the nozzle sleeve 342 are respectively and fixedly connected with the nozzle connecting pipe 341 and the cyclone part 343, the ends of the nozzle connecting pipe 341 and the cyclone part 343 are embedded in the nozzle sleeve 342, and a gas distribution chamber is formed between the nozzle connecting pipe 341 and the cyclone part 343; the air inlet end of the nozzle connecting pipe 341 is connected to the control valve element 3-1 through a pipe, and the cyclone unit 343 is provided with two or more air passages 3431 for mixing and spinning the air flow on the exhaust side of the air passages 3431. The cyclone unit 343 has a cylindrical structure as a whole, and two or more spiral groove-shaped air passages 3431 are formed on the outer cylindrical surface of the cyclone unit 343, and the air inlets and the air outlets of the air passages 3431 are symmetrically distributed along the central axis of the cyclone unit 343. The length of the cyclone part 343 is less than that of the nozzle sleeve 342, and the whole body of the cyclone part 343 is completely embedded in the nozzle sleeve 342. The number of the gas passages 3431 is 2 to 4. The cyclone unit 343 is formed by forming a plurality of spiral air grooves on one cylinder in a shape similar to the thread of a multi-head screw. In order to make the ejected air flow rotate, at least two spiral air grooves are required to be opened and are uniformly distributed. So that the ejected air flow can rotate in the flame path. The gas in the combustion area of the lower fire hole of the flame path can be provided with a rotary driving force; preferably, a four-start helical air passage is selected.

Example 2

The present embodiment is different from embodiment 1 in the specific structure of the showerhead module 3-4, specifically in the specific structure of the cyclone part 343. In the scheme, the cyclone unit 343 is integrally a cylindrical structure, more than 2 inclined hole-shaped air passages 3431 are arranged along the length direction of the cylinder of the cyclone unit 343, the centers of the air inlets of the air passages 3431 are located on the same circle and symmetrically arranged along the center of the end face, the overall length direction of the air passages 3431 is inclined at equal angles towards the same counterclockwise or clockwise direction, and the inclined direction is the tangential direction of the circle located along the center of the inlet of the air passage 3431. One end of the cyclone part 343 is embedded in the nozzle sleeve 342, and the other end extends out of the nozzle sleeve 342; the number of the gas passages 3431 is 2 to 4.

The core component of the nozzle assembly 3-4 is a cyclone portion 343, the cyclone portion 343 of this embodiment is a nozzle guide plate, and four inclined holes are disposed on the nozzle guide plate, and are uniformly distributed on the same pitch circle, and the inclined direction is the tangential direction on the pitch circle, and the inclined directions of the four holes are the same, and a clockwise or counterclockwise direction can be adopted. Thus, the ejected airflow can form a rotary air mass in the flame path.

The sprayed compressed air can push the gas in the flame path to rotate according to the clockwise or anticlockwise oblique layout in the drawing, so that the volatile components in the lower flame port are stirred and rotated and mixed together, and the aim of quickly and uniformly mixing the volatile components and the air is fulfilled. Compare traditional mode that adjusts the temperature, great reduction manpower and materials.

In practical use, the temperature regulating system is provided with an existing compressed air source beside each furnace of the calcining workshop, and is mainly used for cleaning a large path of volatile matters, so that the temperature regulating system is connected to the device and is convenient to use. The principle of the device is that the temperature of the flame path is reduced by externally adding compressed cold air, and intelligent temperature adjustment is realized under the control of the control cabinet 3-3. Compressed air sprayed by the nozzle assemblies 3-4 has a self-rotation function, so that volatile components and preheated air in a flame path can be driven to rotate, stir and mix together, combustion is more uniform, a combustion area is enlarged, a flame area is dispersed to be larger, the relative temperature is reduced, the temperature adjusting mode is more reliable than the traditional intelligent temperature adjusting mode, the generated nitrogen oxides are reduced because the compressed air is not influenced by negative pressure change, and overhigh temperature of a local area is avoided. The cost is correspondingly low.

The specific implementation steps are that the amount of preheated combustion-supporting air of the calcining furnace entering the flame path is adjusted to a proper state, so that the preheated air amount can support the complete combustion of volatile components, and then the intelligent temperature regulating system is started. Each fire channel of the control system is provided with a temperature measuring element 3-2, and the compressed air inlet system is provided with a manual valve 312 and an electric control valve 311. The temperature measuring element 3-2 transmits data back to the control cabinet 3-3, and if the temperature is too high, the entering amount of compressed air is increased by control to cool; if the measured temperature is too low, the amount of compressed cold air entering is reduced. Setting the periodic temperature measurement once. The control cabinet 3-3 can realize intelligent control by using an internet of things control mode and can also select a common automatic mode for control, and the temperature regulation of the system is not influenced by the total negative pressure of the furnace body and is more stable and reliable; because the gas in the flame path at the lower flame port is rotary, the temperature in the flame path can be more uniform, the generation of nitrogen oxides is reduced, and the environmental protection pressure and the denitration cost are reduced.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. External compressed air supply type pot calciner temperature control system, which comprises a compressed air supply device (1) and a temperature control device (3), and is characterized in that: the temperature control device (3) comprises a control valve element (3-1), a temperature measuring element (3-2) and a control cabinet (3-3), a pipeline at the gas outlet side of the control valve element (3-1) extends into a temperature adjusting port (4) of a fire path of the calcining furnace, and a nozzle assembly (3-4) is arranged at the tail end of a pipeline positioned in the temperature adjusting port (4); the temperature measuring element (3-2) is arranged at the fire flue of the calcining furnace and used for acquiring the temperature of the fire flue and sending data to the control cabinet (3-3); the control valve element (3-1) is used for adjusting the air inflow of the compressed air according to the instruction of the control cabinet (3-3); a pressure reducing valve (2) is arranged at the outlet end of the compressed air supply device (1), and the outlet end of the pressure reducing valve (2) is connected with an air inlet side pipeline of the control valve element (3-1);

the sprayer assembly (3-4) comprises a sprayer connecting pipe (341), a sprayer sleeve (342) and a cyclone part (343), the sprayer connecting pipe (341) and the sprayer sleeve (342) are both of tubular structures, two ports of the sprayer sleeve (342) are respectively fixedly connected with the sprayer connecting pipe (341) and the cyclone part (343), the end heads of the sprayer connecting pipe (341) and the cyclone part (343) are embedded in the sprayer sleeve (342), and a gas distribution chamber is formed between the sprayer connecting pipe (341) and the cyclone part (343); the air inlet end of the spray head connecting pipe (341) is connected with the control valve element (3-1) through a pipeline, and more than two air passages (3431) are arranged on the cyclone part (343), so that the air flows are mixed at the air exhaust side of the air passages (3431) and spin.

2. The external compressed air supply type pot calciner temperature control system according to claim 1, characterized in that: the cyclone unit (343) is a cylindrical structure as a whole, more than two spiral groove-shaped air passages (3431) are formed on the outer cylindrical surface of the cyclone unit (343), and the air inlets and the air outlets of the air passages (3431) are symmetrically distributed along the central axis of the cyclone unit (343).

3. The external compressed air supply type temperature control system for the pot calciner as claimed in claim 2, wherein: the length of the cyclone part (343) is less than that of the spray head sleeve (342), and the cyclone part (343) is integrally arranged in the spray head sleeve (342).

4. The external compressed air supply type temperature control system for the pot calciner as claimed in claim 2, wherein: the number of the air passages (3431) is 2-4.

5. The external compressed air supply type pot calciner temperature control system according to claim 1, characterized in that: the cyclone unit (343) is integrally in a cylindrical structure, more than 2 inclined hole-shaped air passages (3431) are arranged along the length direction of the cylinder of the cyclone unit (343), and the air passages (3431) are integrally inclined at equal angles along the same counterclockwise or clockwise direction.

6. The external compressed air supply type temperature control system for the pot calciner as claimed in claim 5, wherein: one end of the cyclone part (343) is embedded in the nozzle sleeve (342), and the other end extends out of the nozzle sleeve (342).

7. The external compressed air supply type temperature control system for the pot calciner as claimed in claim 5, wherein: the number of the air passages (3431) is 2-4.

8. The external compressed air supply type pot calciner temperature control system according to claim 1, characterized in that: the control valve element (3-1) comprises an electric control valve (311) and a manual valve (312) which is positioned by-pass of the electric control valve (311).

9. The external compressed air supply type pot calciner temperature control system according to claim 1, characterized in that: an air door pulling plate (5) is arranged at the temperature adjusting port (4), and the air door pulling plate (5) is made of transparent materials.