Flame path opening structure of calcining furnace

Abstract

The utility model discloses a calcining furnace flame path opening structure which comprises a large wall, a flame path and a preheating air channel are arranged in the large wall, a volatile component channel communicated with the flame path and a collecting channel used for collecting volatile components are further arranged in the large wall, and the top of the first layer of the flame path is connected with a cold air pipeline through a cold air door. The cold air pipeline is connected with a cold air source pipeline through an air cooler, a pull plate valve is arranged at the communication position of the volatile component channel and the flame path, the preheating air channel is provided with an air source pipeline and an air output pipeline, the output end of the air output pipeline is communicated with a combustion-supporting pipeline and a temperature control pipeline, and the output end of the temperature control pipeline is communicated with the cold air pipeline. According to the calcining furnace flame path opening structure, the air cooling system is additionally arranged on the flame path, the internal temperature of the flame path is controlled, and the proportion of the preheated air and the valve for inputting cold air is controlled, so that the purpose of controlling the internal temperature of the flame path is achieved, the flame path is prevented from being burnt through, air is supplemented into the flame path, and the quality of calcined coke is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a calcining furnace, in particular to a fire channel and a fire channel opening structure of a calcining furnace. Background Art

[0002] The calcining furnace is an important equipment for the production of calcined coke. It adds petroleum coke into the calcining furnace tank through the feeding device, and calcines at a high temperature of 1300℃ under air-tight conditions to produce qualified calcined coke. Four tanks form a group of downstream tank calcining furnaces, and each group has four fire channels. Each fire channel is divided into 8 layers from top to bottom. The front and rear tanks share 2 fire channels, and each layer of fire channels is connected end to end. The flame and high-temperature flue gas move from top to bottom and enter the smoke collecting duct after being adjusted by the negative pressure pull plate. The height of the 8-layer downstream tank calcining furnace is 6728cm, of which the furnace The bottom height is 1020cm, the tank silicon brick body height is 4488cm, the furnace top height is 1220cm, the fire channel height of each layer is 250*544mm, and the lower burner size of the volatile matter in the first layer of fire channel is 214*260mm. The 8-layer downstream pot calcining furnace used by our company has a furnace body height of 7680, of which the furnace bottom height is 1020cm, the tank silicon brick body height is 5440cm, the furnace top height is 1220cm, the fire channel height of each layer is 250*680mm, and the lower burner size of the volatile matter in the first layer of fire channel is 214*260mm.

[0003] Due to the small cross-sectional area of ​​the lower burner of the first-layer fire channel with a height of 680, the air supply is insufficient, and the volatile matter needs to be sent back to the fire channel mouth for combustion, resulting in the local high temperature burning through the fire channel of the first-layer fire channel wall of the calcining furnace, the calcination zone fire channel temperature is low and the qualified rate is less than 50%, and the quality of the calcined coke fluctuates greatly. Therefore, this application is proposed to improve the fire channel and the fire channel mouth structure to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a calcining furnace flue structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A calcining furnace fire channel structure comprises a large wall, in which a fire channel and a preheating air channel are arranged, a volatile matter channel connected to the fire channel and a collecting channel for collecting volatile matters are also arranged in the large wall, the top of the first floor of the fire channel is connected to a cold air pipeline through a cold air door, the cold air pipeline is connected to a cold air source pipeline through a cold air blower, and a pull plate valve is arranged at the connection between the volatile matter channel and the fire channel.

[0007] As a further solution of the utility model: the preheating air channel is provided with an air source pipeline and an air output pipeline, the output ends of the air output pipeline are respectively connected to the combustion-supporting pipeline and the temperature control pipeline, and the output end of the temperature control pipeline is connected to the cold air pipeline.

[0008] As a further solution of the utility model: valves are arranged on the cold air source pipeline, the temperature control pipeline and the combustion-supporting pipeline.

[0009] As a further solution of the utility model: a hole which opens upward is provided on the top of the first floor of the fire channel and extends one meter upward, and a cold air door is located in the hole, and there are multiple cold air doors.

[0010] As a further solution of the utility model: a heating channel connected with the fire channel is arranged in the large wall, and a fuel port is arranged on the heating channel.

[0011] As a further solution of the utility model: the top of the collecting channel is connected to the volatile outlet, and a receiving cover is provided on the volatile outlet. The receiving cover sends the volatiles into the heating channel through a volatile recovery pipeline, and a volatile recovery fan is installed on the volatile recovery pipeline.

[0012] As a further solution of the utility model: the air cooler is equipped with a fan inverter to control the air volume.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The calcining furnace flue port structure adds an air cooling system through the flue to control the internal temperature of the flue. The temperature in the flue is controlled by proportional control of the valves for preheating air and inputting cold air to avoid burning through. At the same time, air is added into the flue to improve the quality of calcined coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the structure of a calcining furnace fire mouth.

[0016] In the figure: 1. large wall; 2. fire channel; 3. preheating air channel; 4. volatile matter channel; 5. collecting channel; 6. volatile matter outlet; 7. receiving hood; 8. volatile matter recovery pipeline; 9. fuel port; 10. volatile matter recovery fan; 11. heating channel; 12. air source pipeline; 13. air output pipeline; 14. combustion-supporting pipeline; 15. temperature control pipeline; 16. cold air pipeline; 17. cold air source pipeline; 18. cold air fan; 19. valve; 20. cold air door. DETAILED DESCRIPTION

[0017] See also Figure 1In the embodiment of the utility model, a calcining furnace fire channel structure includes a large wall 1, a fire channel 2 and a preheating air channel 3 are arranged in the large wall 1, a volatile channel 4 connected to the fire channel 2 and a collecting channel 5 for collecting volatiles are also arranged in the large wall 1, the top of the first floor of the fire channel 2 is connected to the cold air pipeline 16 through a cold air door 20, and the cold air pipeline 16 is connected to the cold air source pipeline 17 through a cold air fan 18, and a pull plate valve is arranged at the connection between the volatile channel 4 and the fire channel 2, and the volatiles need to be sent back to the fire channel for combustion. The combustion of volatiles is mainly concentrated in the fire channel 2 of the first floor, resulting in the local high temperature burning through the fire channel of the first floor of the calcining furnace. Therefore, a cold air door 20 is installed on the top of the first floor fire channel 2, and a wind cooling system composed of a cold air fan 18 and a cold air source pipeline 17 is installed. The material tanks are arranged in pairs in the vertical and horizontal directions, and together with the four fire channels 2 on both sides, they form a group. A furnace has 6 groups, and the fire channels 2 are divided into 8 at the height of the material tanks. The flue gas takes a long zigzag route in the fire channel 2. The middle part of the furnace body is composed of six groups of material tanks and the fire channel 2. The outside is surrounded by a large wall 1. The large wall 1 is provided with a volatile channel 4 and a preheating air channel 3. The volatiles discharged during the calcination process flow out from the overflow port at the top of the tank. The volatiles in the same group are collected by the collecting channel 5 at the top of the furnace. Then, the volatiles in the large wall are sent to the heating channel 11 through the volatile recovery pipeline 8 for combustion. The air control at the bottom of the fire channel is controlled by the volatile pull plate at the top of the first-layer fire channel 2. In order to control the amount of volatile matter and preheated air, a cold air door 20 is set on the wall of the first-layer fire channel 2. The amount of air added is controlled by adjusting the size of the cold air door 20. When adjusting, the flame of the first-layer fire channel 2 is controlled to be 1-2 cm away from the bottom of the first-layer fire channel. The situation of the lower fire port behind the furnace can be seen from the fire channel opening in front of the furnace, so that air and volatile matter can be mixed and burned, the fire channel temperature is increased while the flame is prolonged, and the calcination zone temperature is lengthened. The calcining furnace is simple to operate and adjust, and the temperature control is more stable, which can effectively avoid the local high temperature of the first-layer fire channel wall of the calcining furnace burning through the fire channel and improve the quality of calcined coke.

[0018] In a preferred embodiment, the preheating air channel 3 is provided with an air source pipeline 12 and an air output pipeline 13. The output ends of the air output pipeline 13 are respectively connected to the combustion-supporting pipeline 14 and the temperature control pipeline 15. The output end of the temperature control pipeline 15 is connected to the cold air pipeline 16. The preheated air enters the preheating air channel 3 through the air source pipeline 12, and is discharged through the air output pipeline 13 after preheating. The preheated air is divided into two paths, one path is sent to the combustion-supporting pipeline 14, and the other path is sent to the cold air pipeline 16 through the temperature control pipeline 15, and finally enters the first-floor fire channel 2 for air replenishment.

[0019] In a preferred embodiment, valves 19 are provided on the cold air source pipeline 17, the temperature control pipeline 15 and the combustion-supporting pipeline 14. The valve 19 is used to control the ratio of the cold air source pipeline 17 and the temperature control pipeline 15, and the preheated air and the air at normal temperature are mixed to achieve the temperature control of the replenished air, so that its temperature can meet the air replenishment demand without affecting the combustion temperature in the fire channel 2. At the same time, the combustion temperature can be controlled by the temperature of the replenished air and maintained within a certain range.

[0020] In a preferred embodiment, a hole that opens wide upward is provided on the top of the first floor of the fire channel 2 and extends upward by one meter. A cold air door 20 is located in the hole. There are multiple cold air doors 20. The cold air door 20 is mostly made of metal, which may cause deformation and damage if it is in a high temperature environment for a long time. Therefore, the hole is extended to keep the cold air door 20 away from the high combustion area to avoid damage.

[0021] In a preferred embodiment, a heating channel 11 connected to the fire channel 2 is provided in the large wall 1, and a fuel port 9 is provided on the heating channel 11. The top of the collecting channel 5 is connected to the volatile outlet 6, and a receiving cover 7 is provided on the volatile outlet 6. The receiving cover 7 sends the volatiles into the heating channel 11 through the volatile recovery pipeline 8. The volatile recovery pipeline 8 is installed with a volatile recovery fan 10 to recover and burn the volatiles so that the volatiles are utilized.

[0022] In a preferred embodiment, the air cooler 18 is equipped with a fan inverter to control the air volume. The air cooler 18 relies on the input mechanical energy to increase the gas pressure and discharge the gas mechanically. The frequency conversion speed control device is used to change the speed of the air cooler 18, thereby changing the output air volume of the air cooler 18 and adjusting the air supply amount in the fire channel 2.

[0023] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0024] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A calcining furnace flue opening structure, comprising a large wall (1), a flue (2) and a preheating air passage (3) being arranged in the large wall (1), a volatile matter passage (4) communicating with the flue (2) and a collecting passage (5) for collecting volatile matter being also arranged in the large wall (1), characterized in that: The top of the first floor of the fire channel (2) is connected to a cold air pipeline (16) via a cold air door (20), the cold air pipeline (16) is connected to a cold air source pipeline (17) via a cold air fan (18), and a pull plate valve is provided at the connection between the volatile component channel (4) and the fire channel (2).

2. A calcining furnace flue opening structure according to claim 1, characterized in that: The preheating air channel (3) is provided with an air source pipeline (12) and an air output pipeline (13); the output end of the air output pipeline (13) is respectively connected to the combustion-supporting pipeline (14) and the temperature control pipeline (15); and the output end of the temperature control pipeline (15) is connected to the cold air pipeline (16).

3. A calcining furnace flue opening structure according to claim 2, characterized in that: Valves (19) are provided on the cold air source pipeline (17), the temperature control pipeline (15) and the combustion-supporting pipeline (14).

4. The calcining furnace flue opening structure according to claim 1, characterized in that: The top of the first floor of the fire channel (2) is provided with a hole that opens upward and extends one meter upward. A cold air door (20) is located in the hole. The number of the cold air doors (20) is multiple.

5. The calcining furnace flue opening structure according to claim 1, characterized in that: A heating channel (11) communicating with the fire channel (2) is provided in the large wall (1), and a fuel port (9) is provided on the heating channel (11).

6. The calcining furnace flue opening structure according to claim 5, characterized in that: The top of the collecting channel (5) is connected to the volatile component outlet (6), and a receiving cover (7) is provided on the volatile component outlet (6). The receiving cover (7) sends the volatile component into the heating channel (11) through the volatile component recovery pipeline (8), and the volatile component recovery pipeline (8) is installed with a volatile component recovery fan (10).

7. The calcining furnace flue opening structure according to claim 1, characterized in that: The cooling air fan (18) is equipped with a fan frequency converter to control the air volume.

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