One-button intelligent powder injection control model

Abstract

The utility model discloses a one-key intelligent powder making and blowing control model, comprising a coal mill, a coal feeding system, a bag powder collector, an exhaust fan, an exhaust pipe, an exhaust fan and a flue gas furnace, the exhaust outlet of the exhaust pipe connected to the high-temperature exhaust gas outlet is connected to the air inlet of the exhaust fan, the exhaust outlet of the exhaust fan is connected to the inside of the flue gas furnace, the dry gas outlet of the flue gas furnace is connected to the air inlet of the coal mill through a dry gas delivery pipe, one end of the exhaust gas connecting pipe close to the exhaust gas fan outlet is connected to an exhaust gas bypass pipe, and the end of the exhaust gas bypass pipe away from the exhaust gas connecting pipe is connected to the dry gas delivery pipe; in the utility model, the exhaust gas bypass pipe and the exhaust gas bypass regulating valve arranged can directly provide the coal mill with dry exhaust gas with a certain high temperature and low oxygen content across the flue gas furnace, thereby reducing the oxygen content in the coal mill when the system is started or in an emergency, and making the temperature of the system stable and controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of coal powder preparation, in particular to a one-button intelligent pulverizing and injection control model. Background Art

[0002] The coal injection system is an important part of the iron-making production process. The pulverized coal injection in the blast furnace is an important measure to replace coke with coal to provide heat and reducing agent in the blast furnace smelting process, thereby saving energy costs and coke resources.

[0003] The existing pulverizing system is mainly composed of a flue gas furnace, a coal mill, a feeding system, a coal feeder, a bag powder collector, a main exhaust fan and other auxiliary systems.

[0004] The start-up and shutdown and operation process of the powder making system have very high requirements for stable and adjustable temperature. The diameter of the gas pipeline currently used is large, and the normal opening of the regulating valve is within 15%, which is not conducive to high-precision regulation in system control.

[0005] At the same time, waste gas is particularly critical in the powder making system, especially in the allocation stability, adjusting the micro-negative pressure of the flue gas furnace, controlling the oxygen and carbon monoxide concentrations, increasing the system air volume, and controlling the system temperature and the oxygen and carbon monoxide values ​​during the start-up and shutdown process. However, at present, the waste gas needs to enter the flue gas furnace and then enter the grinder, which is not conducive to the data control of the system start-up and shutdown.

[0006] Therefore, a one-button intelligent powder blowing control model is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a one-key intelligent powder making and blowing control model, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] The one-button intelligent pulverizing injection control model includes a coal mill, a coal feeding system, a bag powder collector, an exhaust fan, an exhaust pipe, an exhaust fan and a flue gas furnace. The discharge port of the coal feeding system is connected to the feed port of the coal mill through a coal block conveying pipe, the coal powder outlet of the coal mill is connected to the coal powder inlet of the bag powder collector through a coal powder conveying pipe, the negative pressure port of the bag powder collector is connected to the air inlet of the exhaust fan through a negative pressure pipe, and the exhaust port of the exhaust fan is connected to the discharge pipe, which is connected to the high-temperature exhaust gas outlet. The outlet of the exhaust pipe connected to the exhaust port is connected to the air inlet of the exhaust gas fan, the outlet of the exhaust gas fan is connected to the inside of the flue gas furnace, the dry gas outlet of the flue gas furnace is connected to the air inlet of the coal mill through a dry gas delivery pipe, one end of the exhaust gas connecting pipe close to the exhaust gas fan outlet is connected to a waste gas bypass pipe, one end of the exhaust gas bypass pipe away from the exhaust gas connecting pipe is connected to the dry gas delivery pipe, and a waste gas bypass regulating valve is installed on the exhaust gas bypass pipe.

[0010] In the one-button intelligent powder making and blowing control model according to the utility model, an exhaust gas regulating valve is installed on the exhaust gas connecting pipe, and the exhaust gas bypass pipe is arranged away from the exhaust gas connecting pipe. The exhaust gas regulating valve will not close the exhaust gas bypass pipe after closing.

[0011] In the one-button intelligent powder making and blowing control model according to the utility model, a dry gas regulating valve is installed at the dry gas outlet of the flue gas furnace, one end of the dry gas delivery pipe away from the air inlet of the coal mill is connected to the air outlet of the dry gas regulating valve, and the air outlet of the exhaust gas bypass pipe is arranged away from the air inlet of the dry gas regulating valve, so that the exhaust gas bypass pipe will not be closed after the dry gas regulating valve is closed.

[0012] In the one-button intelligent powder making and blowing control model according to the utility model, the gas inlet of the internal combustion chamber of the flue gas furnace is connected with a gas pipe, the gas pipe is provided with a gas regulating valve, the gas pipe is connected with a gas bypass pipe, the gas bypass pipe is installed with a gas bypass regulating valve, one end of the gas bypass pipe is connected with the air inlet of the gas regulating valve, and the air outlet of the gas bypass pipe is connected with the air outlet of the gas regulating valve.

[0013] In the one-button intelligent powder making and blowing control model according to the utility model, a gas pressure stabilizing valve is installed at one end of the gas pipe away from the gas inlet of the flue gas furnace.

[0014] In the one-button intelligent powder making and blowing control model according to the utility model, it also includes an induced draft fan, the air outlet of the induced draft fan is connected with the air inlet of the internal combustion chamber of the flue gas furnace through an air delivery pipe, a first air regulating valve is installed on the air delivery pipe, an air bypass pipe is connected to the air delivery pipe, an air bypass regulating valve is installed on the air bypass pipe, the air inlet of the air bypass pipe is connected with the air inlet of the first air regulating valve, and the air outlet of the air bypass pipe is connected with the air outlet of the first air regulating valve.

[0015] The utility model has at least the following beneficial effects:

[0016] The exhaust gas bypass pipe and exhaust gas bypass regulating valve can directly provide the coal mill with a certain high temperature and low oxygen content dry exhaust gas across the flue gas furnace, thereby reducing the oxygen content in the coal mill when the system is started or in an emergency, and making the system temperature stable and controllable;

[0017] Since the gas flow directly affects the temperature inside the flue gas furnace, and further affects the temperature at the coal mill inlet, the gas bypass pipe and gas bypass regulating valve can be used in conjunction with the original gas regulating valve to accurately control the gas flow, and further more accurately control the temperature inside the flue gas furnace.

[0018] Gas pressure fluctuations will directly affect the temperature inside the flue gas furnace. The gas pressure stabilizing valve can be used to stabilize the gas pressure in advance, making it easier for the post-placed gas regulating valve and gas bypass regulating valve to adjust the temperature inside the flue gas furnace.

[0019] The ratio of combustion-supporting air volume and gas flow rate needs to be in the optimal state to make the flue gas furnace achieve the best efficiency, so that gas is not wasted and the oxygen content is at the lowest value. The newly added air bypass regulating valve is combined with the original first air regulating valve, gas regulating valve and gas bypass regulating valve to further ensure the stability of the internal temperature of the flue gas furnace and further reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Description of Figure Numbers:

[0023] 1. Coal mill; 101. Coal powder conveying pipe; 2. Coal feeding system; 201. Coal block conveying pipe; 3. Bag powder collector; 301. Negative pressure pipe; 4. Exhaust fan; 5. Discharge pipe; 6. Waste gas pipe; 7. Waste gas fan; 8. Flue gas furnace; 9. Waste gas connecting pipe; 901. Waste gas regulating valve; 10. Waste gas bypass pipe; 1001. Waste gas bypass regulating valve; 11. Gas pipe; 1101. Gas pressure stabilizing valve; 1102. Gas regulating valve; 12. Gas bypass pipe; 1201. Gas bypass regulating valve; 13. Draft fan; 1301. Air conveying pipe; 1302. First air regulating valve; 14. Air bypass pipe; 1401. Air bypass regulating valve; 15. Dry gas conveying pipe; 1501. Dry gas regulating valve. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] Please refer to Figure 1 As shown, the present embodiment provides a one-key intelligent pulverizing injection control model, comprising a coal mill 1, a coal feeding system 2, a bag powder collector 3, an exhaust fan 4, an exhaust pipe 6, an exhaust gas fan 7 and a flue gas furnace 8. The discharge port of the coal feeding system 2 is connected to the feed port of the coal mill 1 through a coal block conveying pipe 201, the pulverized coal outlet of the coal mill 1 is connected to the pulverized coal inlet of the bag powder collector 3 through a coal powder conveying pipe 101, the negative pressure port of the bag powder collector 3 is connected to the air inlet of the exhaust fan 4 through a negative pressure pipe 301, the exhaust port of the exhaust fan 4 is connected to a discharge pipe 5, the air outlet of the exhaust pipe 6 connected to the high-temperature exhaust gas outlet is connected to the air inlet of the exhaust gas fan 7, the air outlet of the exhaust gas fan 7 is connected to the inside of the flue gas furnace 8, the dry gas outlet of the flue gas furnace 8 is connected to the air inlet of the coal mill 1 through a dry gas conveying pipe 15, and the exhaust gas connecting pipe 9 is connected to the exhaust gas outlet of the high-temperature exhaust gas outlet. An end near the exhaust gas blower 7 is connected to an exhaust gas bypass pipe 10, and an end of the exhaust gas bypass pipe 10 away from the exhaust gas connecting pipe 9 is connected to a dry gas delivery pipe 15. An exhaust gas bypass regulating valve 1001 is installed on the exhaust gas bypass pipe 10, and an exhaust gas regulating valve 901 is installed on the exhaust gas connecting pipe 9. The exhaust outlet of the exhaust gas bypass pipe 10 is arranged away from the air inlet of the exhaust gas connecting pipe 9, so that the exhaust gas bypass pipe 10 will not be closed after the exhaust gas regulating valve 901 is closed. A dry gas regulating valve 1501 is installed at the dry gas outlet of the flue gas furnace 8, and an end of the dry gas delivery pipe 15 away from the air inlet of the coal mill 1 is connected to the exhaust outlet of the dry gas regulating valve 1501. The exhaust outlet of the exhaust gas bypass pipe 10 is arranged away from the air inlet of the dry gas regulating valve 1501, so that the exhaust gas bypass pipe 10 will not be closed after the dry gas regulating valve 1501 is closed.

[0026] By setting up the exhaust gas bypass pipe 10 and the exhaust gas bypass regulating valve 1001 in the original pulverizing system, the coal mill 1 can be directly provided with a certain high-temperature, low-oxygen dry exhaust gas by bypassing the flue gas furnace 8, thereby reducing the oxygen content in the coal mill 1 when the system is started or in an emergency, and making the temperature of the system stable and controllable.

[0027] Among them, the gas inlet of the internal combustion chamber of the flue gas furnace 8 is connected to the gas pipe 11, and a gas regulating valve 1102 is arranged on the gas pipe 11. The gas pipe 11 is connected to the gas bypass pipe 12, and a gas bypass regulating valve 1201 is installed on the gas bypass pipe 12. One end of the gas bypass pipe 12 is connected to the air inlet of the gas regulating valve 1102, and the air outlet of the gas bypass pipe 12 is connected to the air outlet of the gas regulating valve 1102. Since the size of the gas flow directly affects the temperature inside the flue gas furnace 8, and then affects the temperature of the air inlet of the coal mill 1, the gas bypass pipe 12 and the gas bypass regulating valve 1201 are arranged in conjunction with the original gas regulating valve 1102, the gas flow can be accurately controlled, and the temperature inside the flue gas furnace 8 can be more accurately controlled.

[0028] Among them, the gas pressure fluctuation will directly affect the temperature inside the flue gas furnace 8, so a gas pressure stabilizing valve 1101 is installed at one end of the gas pipe 11 away from the gas inlet of the flue gas furnace 8. The gas pressure stabilizing valve 1101 can be used to stabilize the gas pressure in advance, so that the post-placed gas regulating valve 1102 and the gas bypass regulating valve 1201 can more easily adjust the temperature inside the flue gas furnace 8. Among them, the combustion-supporting air volume and the gas flow ratio need to be in the optimal state to make the flue gas furnace 8 achieve the best efficiency, so that the gas is not wasted and the oxygen content is at the lowest value. Therefore, an induced draft fan 13 is provided, and the air outlet of the induced draft fan 13 is connected to the internal combustion engine of the flue gas furnace 8 through the air delivery pipe 1301. The air inlet of the chamber is connected, the first air regulating valve 1302 is installed on the air delivery pipe 1301, the air delivery pipe 1301 is connected with an air bypass pipe 14, the air bypass pipe 14 is installed with an air bypass regulating valve 1401, the air inlet of the air bypass pipe 14 is connected with the air inlet of the first air regulating valve 1302, the air outlet of the air bypass pipe 14 is connected with the air outlet of the first air regulating valve 1302, and the newly added air bypass regulating valve 1401 cooperates with the original first air regulating valve 1302 and the gas regulating valve 1102 and the gas bypass regulating valve 1201 to further ensure the stability of the internal temperature of the flue gas furnace 8 and further reduce energy consumption.

[0029] In this system, a PLC intelligent controller is also provided. The PLC intelligent controller monitors the operating data of all temperature sensors, oxygen concentration sensors, air volume sensors, carbon monoxide concentration sensors and pressure sensors in the original system, and implements regulation and control according to the operating data to automatically control the operation of the coal mill 1, the coal feeding system 2, the exhaust fan 4, the exhaust gas fan 7, the exhaust gas regulating valve 901, the exhaust gas bypass regulating valve 1001, the dry gas regulating valve 1501, the flue gas furnace 8, the coal gas pressure stabilizing valve 1101, the coal gas bypass regulating valve 1201, the coal gas regulating valve 1102, the induced draft fan 13, and the air bypass regulating valve 1401, so as to achieve the function of automatic powder making and blowing with one button.

[0030] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A one-button intelligent pulverizing and injection control model, comprising a coal mill (1), a coal feeding system (2), a bag powder collector (3), an exhaust fan (4), an exhaust pipe (6), an exhaust fan (7) and a flue gas furnace (8), wherein the discharge port of the coal feeding system (2) is connected to the feed port of the coal mill (1) through a coal block conveying pipe (201), the pulverized coal outlet of the coal mill (1) is connected to the pulverized coal inlet of the bag powder collector (3) through a coal pulverized coal conveying pipe (101), and the bag powder collector (3) is connected to the feed port of the coal mill (1) through a coal pulverized coal conveying pipe (101). The negative pressure port is connected to the air inlet of the exhaust fan (4) through a negative pressure pipe (301), the exhaust port of the exhaust fan (4) is connected to a discharge pipe (5), the air outlet of the exhaust pipe (6) connected to the high-temperature exhaust gas outlet is connected to the air inlet of the exhaust gas fan (7), the air outlet of the exhaust gas fan (7) is connected to the inside of the flue gas furnace (8), the dry gas outlet of the flue gas furnace (8) is connected to the air inlet of the coal mill (1) through a dry gas delivery pipe (15), and is characterized in that: An end of the exhaust gas connecting pipe (9) close to the exhaust gas blower (7) outlet is connected to an exhaust gas bypass pipe (10), an end of the exhaust gas bypass pipe (10) away from the exhaust gas connecting pipe (9) is connected to the dry gas delivery pipe (15), and an exhaust gas bypass regulating valve (1001) is installed on the exhaust gas bypass pipe (10).

2. The one-key intelligent powder making and blowing control model according to claim 1 is characterized in that: An exhaust gas regulating valve (901) is installed on the exhaust gas connecting pipe (9), and the exhaust gas bypass pipe (10) has an exhaust outlet arranged away from an exhaust gas inlet of the exhaust gas connecting pipe (9), so that the exhaust gas bypass pipe (10) will not be closed after the exhaust gas regulating valve (901) is closed.

3. The one-key intelligent powder making and blowing control model according to claim 2 is characterized in that: A dry gas regulating valve (1501) is installed at the dry gas outlet of the flue gas furnace (8); one end of the dry gas delivery pipe (15) away from the air inlet of the coal mill (1) is connected to the air outlet of the dry gas regulating valve (1501); the air outlet of the exhaust gas bypass pipe (10) is arranged away from the air inlet of the dry gas regulating valve (1501), so that the exhaust gas bypass pipe (10) will not be closed after the dry gas regulating valve (1501) is closed.

4. The one-key intelligent powder making and blowing control model according to claim 3 is characterized in that: The gas inlet of the internal combustion chamber of the flue gas furnace (8) is connected to a gas pipe (11), on which a gas regulating valve (1102) is arranged, and the gas pipe (11) is connected to a gas bypass pipe (12), on which a gas bypass regulating valve (1201) is installed, one end of the gas bypass pipe (12) is connected to the gas inlet of the gas regulating valve (1102), and the gas outlet of the gas bypass pipe (12) is connected to the gas outlet of the gas regulating valve (1102).

5. The one-key intelligent powder making and blowing control model according to claim 4 is characterized in that: A gas pressure stabilizing valve (1101) is installed at one end of the gas pipe (11) away from the gas inlet of the flue gas furnace (8).

6. The one-key intelligent powder making and blowing control model according to claim 4 is characterized in that: The invention also comprises an induced draft fan (13), the air outlet of the induced draft fan (13) being connected to the air inlet of the internal combustion chamber of the flue gas furnace (8) through an air delivery pipe (1301), the air delivery pipe (1301) being provided with a first air regulating valve (1302), the air delivery pipe (1301) being connected to an air bypass pipe (14), the air bypass pipe (14) being provided with an air bypass regulating valve (1401), the air inlet of the air bypass pipe (14) being connected to the air inlet of the first air regulating valve (1302), and the air outlet of the air bypass pipe (14) being connected to the air outlet of the first air regulating valve (1302).

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