On-line automatic ash removal system for kiln

Abstract

The utility model discloses an on-line automatic ash removal system of a kiln, which comprises a dust collection module, a purging module and a control system, the dust collection module further comprises a dust collection funnel, an L-shaped dust suction pipe, a three-way joint A, a cooling pipe, a dust suction fan and a dust collection bin, and the purging module further comprises a gas storage tank, a gas pump, a gas delivery pipe, an electromagnetic pulse valve and a purging pipeline. The control system further comprises a PLC control cabinet, a computer and an air pressure sensor. The device has the functions that the device can set regular ash removal according to the dust amount of the field working condition, the electromagnetic pulse valve is controlled through the PLC control cabinet to further set the blowing interval and the cycle period time, regular ash removal is carried out in cycles, and therefore the ash removal efficiency can be improved, the compressed nitrogen loss amount is reduced, and the purposes of reducing cost and improving efficiency of enterprises are achieved; the dust collecting cloth bag can be prevented from being bonded due to the fact that dust is not cleaned for a long time, large-particle dust is prevented from being accumulated in the L-shaped pipeline, and meanwhile automatic control of dust cleaning is achieved.

Description

Technical Field

[0001] This utility model patent belongs to the technical field of kiln cleaning equipment, and specifically relates to an online automatic kiln cleaning system. Background Art

[0002] In the current atmosphere roller furnace sintering process, about 20%-35% of the materials will be mixed in the atmosphere or settle in the furnace due to reaction splashing, volatilization, etc., mainly settled in the furnace heating section and the transition section between heating and constant temperature, and the heating zone can be divided into multiple sections. The settled materials will adhere to the heating rod, causing the heating rod to be drastically reduced in effectiveness, increasing electricity costs and affecting the sintering quality of the product; they will also condense into blocks and get stuck between the rollers, causing large-scale breakage of the rollers, resulting in shutdown for maintenance; they will also cause the grouting of the air intake pipe at the bottom of the furnace to be unable to supply air, destroying the sintering atmosphere; therefore, it is necessary to regularly clean the ash accumulation, splashing and other materials that affect the kiln transmission inside the furnace, and the current conventional cleaning method is to use manual cleaning, but this method has the risk of scalding and air pollution, and is time-consuming and labor-intensive. Therefore, how to efficiently clean and recycle the materials settled in the furnace to achieve the purpose of reducing costs and increasing efficiency is currently a difficult problem.

[0003] Therefore, the utility model designs an online dust cleaning system which is automated, efficient, safe and environmentally friendly. Utility Model Content

[0004] In order to solve the technical problem that the dust accumulation, splashing materials, broken quartz tubes, resistance wires and silicon carbide square beams in the atmosphere roller furnace used in the sintering process cannot be effectively cleaned and recycled, resulting in a short continuous service life of the kiln and a surge in production costs, the utility model provides an online automatic ash cleaning system for the kiln, which can efficiently recover about 20%-35% of the materials that settle inside the furnace due to splashing and volatilization during the kiln sintering process, so that the recycled materials can be sold as high-priced solid waste, achieving the purpose of reducing costs and increasing efficiency for enterprises. As for the amount of material recovery, it depends on the production capacity of the workshop production line and the process formula.

[0005] In order to achieve the above technical effects, the utility model is implemented through the following technical solutions: an online automatic dust cleaning system for a kiln, including a dust collection module, a purge module, and a control system. The dust collection module is installed at the bottom of the furnace, and the purge module is installed in the dust collection module. The dust collection module, the purge module and the control system are connected by telecommunication. The dust collection module also includes a dust collection funnel, an L-shaped dust extraction pipe, a three-way joint A, a cooling pipe, a dust extraction fan, and a dust collection bin. The dust collection funnel is installed at the bottom of the furnace, the L-shaped dust extraction pipe is installed at the bottom of the dust collection funnel and its top is connected to the bottom of the dust collection funnel. The right side of the L-shaped dust extraction pipe is connected to the cooling pipe through the three-way joint A, the dust extraction fan is installed on the right side of the cooling pipe, and the end of the cooling pipe is connected to the dust collection bin; The purge module also includes an air storage tank, an air pump, an air pipe, an electromagnetic pulse valve, and a purge pipeline. The air storage tank is arranged on the left side of the dust collecting funnel. The exhaust port of the air storage tank is connected to the air pipe, and an air pump is installed on the air pipe. An air filter is installed on the front side of the air pump. The end of the air pipe is connected to the purge pipeline through a three-way joint B. The purge pipelines are respectively arranged on the upper side of the dust collecting funnel and in the L-shaped dust extraction pipe, and an electromagnetic pulse valve is installed at the front end of the purge pipeline; the control system also includes a PLC control cabinet, a computer, and an air pressure sensor. The PLC control cabinet is connected to the dust extraction fan, air pump, electromagnetic pulse valve, computer, and air pressure sensor by telecommunication. The air pressure sensors are respectively installed in the L-shaped dust extraction pipe, the air storage tank, the air pipe, and the purge pipeline.

[0006] Preferably, the dust collecting funnels are arranged in groups of two, and several groups of dust collecting funnels are arranged at the bottom of the furnace.

[0007] Preferably, a high temperature resistant dust collecting bag is provided at the end of the L-shaped dust extraction pipe.

[0008] Preferably, a valve is installed on the right end of the three-way connector A.

[0009] Preferably, a water cooling jacket is installed on the cooling pipe.

[0010] Preferably, an exhaust pipe connected to the kiln chimney is provided on the top of the dust collecting bin.

[0011] Preferably, nitrogen is stored in the gas storage tank.

[0012] Preferably, the purge pipe also includes a purge coil and a purge straight pipe. The purge coil is installed on the upper side of the dust collecting funnel. The purge straight pipe is installed in the L-shaped dust extraction pipe from the right side of the three-way joint A, and a joint C is provided on the purge straight pipe outside the three-way joint A.

[0013] Preferably, the purge coil is provided with air holes on the inner side surface facing the dust collecting funnel.

[0014] Preferably, a plurality of blowing holes are provided on the side of the straight purge pipe.

[0015] The beneficial effects of the utility model are:

[0016] The device can be set for regular cleaning according to the amount of dust in the on-site working conditions. The electromagnetic pulse valve is controlled by the PLC control cabinet to set the injection interval and cycle time. Regular cleaning is performed over and over again. This can improve the cleaning efficiency, reduce the loss of compressed nitrogen, and achieve the goal of reducing costs and increasing efficiency for enterprises. It can also ensure that the dust collecting bags will not stick due to long-term lack of cleaning, and avoid the accumulation of large particles of dust in the L-shaped pipe. At the same time, it also realizes real-time online automatic control of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for describing the embodiment will be briefly introduced below. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is the front view of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of the main view of the utility model;

[0021] Figure 4 For this utility model Figure 3 A partial schematic diagram of the middle part;

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Dust collecting funnel; 2. L-shaped dust extraction pipe; 3. Three-way connector A; 4. Cooling pipe; 5. Dust extraction fan; 6. Dust collecting bin; 7. Air storage tank; 8. Air pump; 9. Air filter; 10. Air supply pipe; 11. Electromagnetic pulse valve; 12. Three-way connector B; 13. Dust collecting bag; 14. Valve; 15. Water cooling jacket; 16. Exhaust pipe; 17. Purge coil; 18. Purge straight pipe; 19. Connector C; 20. Blowing hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. Example 1

[0025] like Figures 1 to 4As shown, the prior art in this embodiment has the following problems: the inventors found that in the prior art, it is necessary to regularly clean the accumulated ash, splashing and other materials that affect the transmission of the kiln inside the furnace, and the current conventional cleaning method is to use manual cleaning, but this method has the risk of scalding and air pollution, and is time-consuming and labor-intensive. Therefore, how to efficiently clean and recycle the materials settled in the furnace to achieve the purpose of reducing costs and increasing efficiency is a current problem.

[0026] Therefore, the inventor provides an online automatic dust cleaning system for a kiln, including a dust collecting module, a purge module, and a control system. The dust collecting module is installed at the bottom of the furnace, and the purge module is installed in the dust collecting module. The dust collecting module, the purge module and the control system are connected by telecommunication. The dust collecting module also includes a dust collecting funnel 1, an L-shaped dust extraction pipe 2, a three-way joint A3, a cooling pipe 4, a dust extraction fan 5, and a dust collecting bin 6. The dust collecting funnel 1 is installed at the bottom of the furnace, the L-shaped dust extraction pipe 2 is installed at the bottom of the dust collecting funnel 1 and its top is connected to the bottom of the dust collecting funnel 1, the right side of the L-shaped dust extraction pipe 2 is connected to the cooling pipe 4 through the three-way joint A3, the right side of the cooling pipe 4 is installed with a dust extraction fan 5, and the end of the cooling pipe 4 is connected to the dust collecting bin 6; the purge module also includes an air storage tank 7 and an air pump 8. , air pipe 10, electromagnetic pulse valve 11, purge pipe, the air storage tank 7 is arranged on the left side of the dust collecting funnel 1, the exhaust port of the air storage tank 7 is connected with the air pipe 10, the air pump 8 is installed on the air pipe 10, the air filter 9 is installed on the front side of the air pump 8, the end of the air pipe 10 is connected with the purge pipe through a three-way joint B12, the purge pipes are respectively arranged on the upper side of the dust collecting funnel 1 and in the L-shaped dust extraction pipe 2, and the front end of the purge pipe is installed with an electromagnetic pulse valve 11; the control system also includes a PLC control cabinet, a computer, and an air pressure sensor. The PLC control cabinet is connected to the dust extraction fan 5, the air pump 8, the electromagnetic pulse valve 11, the computer, and the air pressure sensor by telecommunication, and the air pressure sensors are respectively installed in the L-shaped dust extraction pipe 2, the air storage tank 7, the air pipe 10, and the purge pipe.

[0027] Its working principle and effect are as follows: the device delivers nitrogen to the purge pipe through the air pump 8, and then the dust particles at the bottom of the furnace and in the L-shaped pipe are lifted up through the air blowing holes 20 thereon, and the small and medium-sized dust particles at the bottom of the furnace, water vapor, tar, etc. are brought into the combustion furnace through the chimney on the top of the furnace, and the large dust particles fall into the dust collecting funnel 1 under the action of their own gravity, and then the PLC control cabinet controls the furnace to close the internal exhaust port, and then controls the dust extraction fan 5 to extract the materials in the L-shaped pipe to the dust collecting bin 6;

[0028] During use, the device can be set for regular cleaning according to the amount of dust in the on-site working conditions. The electromagnetic pulse valve 11 can be controlled by the PLC control cabinet to set the injection interval and cycle time, and regular cleaning can be performed repeatedly. This can improve the cleaning efficiency, reduce the loss of compressed nitrogen, and achieve the goal of reducing costs and increasing efficiency for enterprises. It can also ensure that the dust collecting bag 13 will not stick due to long-term lack of cleaning, and avoid the accumulation of large particles of dust in the L-shaped pipe. At the same time, it also realizes real-time online automatic control of cleaning.

[0029] Further preferably, the dust collecting funnels 1 are grouped in two, and several groups of dust collecting funnels 1 are arranged at the bottom of the furnace; this structure can divide the bottom of the furnace into multiple areas, and then accurately control the cleaning amount of each furnace through the PLC control cabinet.

[0030] Further preferably, a high temperature resistant dust collecting bag 13 is provided at the end of the L-shaped dust extraction pipe 2; this structure can separate dust and nitrogen.

[0031] Further preferably, a valve 14 is installed on the right end of the three-way connector A3; this structure can be disassembled, so that the condensed materials in the L-shaped dust extraction pipe 2 can be easily removed manually.

[0032] Further preferably, a water cooling jacket 15 is installed on the cooling pipe 4; this structure can cool down the extracted high-temperature large-particle dust.

[0033] Further preferably, an exhaust pipe 16 connected to the kiln chimney is provided on the top of the dust collecting bin 6; this structure allows the nitrogen to be discharged along the kiln chimney.

[0034] Further preferably, nitrogen is stored in the gas storage tank 7; since nitrogen is an inert gas, it will not affect the sintering of the kiln, thus ensuring the safety of the dust cleaning process.

[0035] Further preferably, the purge pipe also includes a purge coil 17 and a purge straight pipe 18. The purge coil 17 is installed on the upper side of the dust collecting funnel 1. The purge straight pipe 18 is installed in the L-shaped dust extraction pipe 2 from the right side of the three-way joint A3, and a joint C19 is provided on the purge straight pipe 18 outside the three-way joint A3. The purge coil 17 and the purge straight pipe 18 in this structure can lift up the dust particles at the bottom of the furnace and in the L-shaped pipe through the blowing holes 20 thereon, and small particles of dust, water vapor, tar, etc. are removed. After being brought into the combustion furnace through the chimney on the furnace top, large particles of dust fall into the dust collecting funnel 1 under the action of their own gravity. The purge straight pipe 18 can also prevent large particles of dust from accumulating in the L-shaped pipe. At the same time, when some materials that the purge straight pipe 18 cannot blow out are condensed in the L-shaped dust extraction pipe 2, the purge straight pipe 18 in the L-shaped dust extraction pipe 2 can be disassembled through the joint C19, and then the valve 14 is removed and the purge straight pipe 18 is pulled out. In this way, the condensed materials in the L-shaped dust extraction pipe 2 can be removed manually.

[0036] The purge coil 17 is provided with a blowing hole 20 on the inner side thereof facing the dust collecting hopper 1 .

[0037] A plurality of blowing holes 20 are arranged on the side of the purge straight pipe 18 . Example 2

[0038] Based on the description in Example 1, the inventors adopted three control modes of dust cleaning control when designing the utility model, namely, timing, pressure difference, and pressure difference + timing mixed control. In the process of use, timed purge is generally set, that is, cyclic purge is set within a certain period of time; pressure difference purge is automatically purged according to the electromagnetic pulse valve 11 when the pressure difference between the inlet and outlet of the dust exhaust fan 5 reaches the set value, which has a greater impact on the furnace pressure and the pressure in the pipeline, so the inventors give priority to timed purge. Among them, the spraying and interval time can be adjusted steplessly through the potentiometer on the PLC control cabinet according to the working conditions, and finally the ash is unloaded at a fixed time or through the level meter in the dust collecting bin 6.

[0039] Material selection: The main body material of the dust collecting funnel 1 and the L-shaped dust extraction tube 2 can be stainless steel.

[0040] The inventor's experiments have shown that about 20%-35% of the materials that settle inside the furnace due to splashing and volatilization during the kiln sintering process can be efficiently recycled, so that the recycled materials can be sold as high-priced solid waste, achieving the goal of reducing costs and increasing efficiency for the enterprise. As for the amount of material recycling, it depends on the production capacity of the workshop production line and the process formula.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An online automatic dust cleaning system for a kiln, comprising a dust collecting module, a purge module and a control system, wherein the dust collecting module is installed at the bottom of the furnace, a purge module is installed in the dust collecting module, and the dust collecting module, the purge module and the control system are connected by telecommunication, characterized in that: The dust collecting module further comprises a dust collecting funnel (1), an L-shaped dust extraction pipe (2), a three-way joint A (3), a cooling pipe (4), a dust extraction fan (5), and a dust collecting bin (6); the dust collecting funnel (1) is installed at the bottom of the furnace; the L-shaped dust extraction pipe (2) is installed at the bottom of the dust collecting funnel (1) and its top end is connected to the bottom of the dust collecting funnel (1); the right side of the L-shaped dust extraction pipe (2) is connected to the cooling pipe (4) via the three-way joint A (3); the right side of the cooling pipe (4) is installed with a dust extraction fan (5); and the end of the cooling pipe (4) is connected to the dust collecting bin (6); the purge module further comprises an air storage tank (7), an air pump (8), an air delivery pipe (10), an electromagnetic pulse valve (11), and a purge pipe; the air storage tank (7) is arranged on the left side of the dust collecting funnel (1); An air supply pipe (10) is connected to the exhaust port of the gas tank (7), an air pump (8) is installed on the air supply pipe (10), an air filter (9) is installed on the front side of the air pump (8), the end of the air supply pipe (10) is connected to the purge pipe through a three-way joint B (12), the purge pipe is respectively arranged on the upper side of the dust collecting funnel (1) and in the L-shaped dust extraction pipe (2), and an electromagnetic pulse valve (11) is installed at the front end of the purge pipe; the control system further comprises a PLC control cabinet, a computer, and an air pressure sensor, the PLC control cabinet is connected to the dust extraction fan (5), the air pump (8), the electromagnetic pulse valve (11), the computer, and the air pressure sensor by telecommunication, and the air pressure sensor is respectively installed in the L-shaped dust extraction pipe (2), the gas storage tank (7), the air supply pipe (10), and the purge pipe.

2. The kiln online automatic ash cleaning system according to claim 1 is characterized by: The dust collecting funnels (1) are arranged in groups of two, and a plurality of groups of dust collecting funnels (1) are arranged at the bottom of the furnace.

3. The online automatic ash cleaning system for a kiln according to claim 1 is characterized by: A high temperature resistant dust collecting bag (13) is provided at the end of the L-shaped dust extraction pipe (2).

4. The kiln online automatic ash cleaning system according to claim 1 is characterized by: A valve (14) is installed on the right end of the three-way connector A (3).

5. The kiln online automatic ash cleaning system according to claim 1 is characterized by: A water cooling jacket (15) is installed on the cooling pipe (4).

6. The kiln online automatic ash cleaning system according to claim 1 is characterized by: An exhaust pipe (16) connected to the chimney of the kiln is arranged on the top of the dust collecting bin (6).

7. The kiln online automatic ash cleaning system according to claim 1 is characterized by: The gas storage tank (7) stores nitrogen.

8. The kiln online automatic ash cleaning system according to claim 1 is characterized by: The purge pipe further comprises a purge coil (17) and a purge straight pipe (18). The purge coil (17) is installed on the upper side of the dust collecting funnel (1). The purge straight pipe (18) is installed in the L-shaped dust extraction pipe (2) from the right side of the three-way joint A (3). A joint C (19) is provided on the purge straight pipe (18) outside the three-way joint A (3).

9. The kiln online automatic ash cleaning system according to claim 8 is characterized by: The purge coil (17) is provided with a blowing hole (20) on the inner side surface facing the dust collecting funnel (1).

10. The kiln online automatic ash cleaning system according to claim 8, characterized in that: A plurality of blowing holes (20) are provided on the side of the straight blowing pipe (18).

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