Multifunctional rotary kiln production line and dust collection flue gas temperature adjusting method thereof

Abstract

The invention discloses a multifunctional rotary kiln production line and a dust collection flue gas temperature adjusting method thereof.The multifunctional rotary kiln production line comprises a production line body and is characterized in that the multifunctional rotary kiln production line has the functions of a down-flow rotary kiln and a counter-flow rotary kiln at the same time, can be switched halfway or used at the same time independently according to process requirements and serves as a volatilization kiln for smelting in the metallurgy field and a dust collection flue gas temperature adjusting device. Meanwhile, the temperature of the high-temperature flue gas can be adjusted, and the kiln has multiple functions, is suitable for the treatment process requirements of multiple fields and multiple materials, is flexible, simple and convenient, and saves investment; the flue gas cooling area is adjusted at any time, and the flue gas flow is controlled by controlling the opening degree of the valve, so that the temperature and the flow of the flue gas entering the pulse dust collector meet the process requirements, the phenomenon that the flue gas is too low to dew or too high to burn out a cloth bag is avoided, and the temperature of the high-temperature flue gas and the flowing direction of the flue gas can be adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, in particular to a multifunctional rotary kiln production line and a dust collection flue gas temperature regulating method thereof. Background Art

[0002] Incineration, material drying, calcination and non-ferrous metal volatilization smelting and other fields. At present, kilns with single functions are generally used, that is, a separate garbage incineration kiln is built for garbage incineration, a separate drying kiln is built for material drying, a separate calcination kiln is built for calcination, and a separate volatilization kiln is built for non-ferrous metal volatilization smelting and recovery. For small organizations, this construction method results in repeated construction of kilns, occupation of resources, large investment, and low utilization rate of separate kilns.

[0003] The rotary kiln can make full use of heat energy, which is beneficial to reducing production costs. The materials in the furnace body can be subjected to uniform high-temperature hot air in a short time as they rotate, thereby achieving the purpose of rapid thermalization and efficient reaction. The application field of the rotary kiln is very wide, and it is suitable for cement production, lime production, metallurgical industry, chemical industry and other fields. With the continuous advancement of technology, rotary kilns are becoming more and more intelligent and automated, and can better adapt to various production requirements. The rotary kiln has high production efficiency and can greatly improve production efficiency. In the rotary kiln, the material can be subjected to all-round heating and strong hot air convection, so that the material can complete the sintering and aging process in a short time. The rotary kiln has high operating stability and can meet different production requirements. By adjusting the rotation speed, controlling the air volume and feeding amount and other parameters, the normal operation of the rotary kiln can be ensured. ‌ However, the traditional rotary kiln has the following disadvantages: (1) Most rotary kilns use countercurrent rotary kilns, that is, the direction of flue gas flow is opposite to the direction of material flow. This process is prone to cause flue gas accumulation and explosion accidents when processing complex self-igniting materials. At the same time, it is impossible to adjust the concentration and temperature of the flue gas, and it is impossible to carry out downstream production, which lacks flexibility; (2) In general, the products or slag discharged from the kiln head after calcination, incineration, and volatilization smelting in a rotary kiln are cooled by water quenching or by building a cooling production device such as a cooling machine or cooling kiln. The raw materials are preheated by building a preheater or preheating furnace at the kiln tail. This has a complex structure, high power consumption, large investment, and high operating costs. Summary of the invention

[0004] The object of the present invention is to provide a multifunctional rotary kiln production line and a dust collection flue gas temperature regulation method thereof, so as to solve the problem that most rotary kilns proposed in the above background technology adopt countercurrent rotary kilns, that is, the direction of flue gas flow is opposite to the direction of material flow. When processing complex self-igniting materials, this process is prone to cause flue gas accumulation and cause accidents such as explosions. At the same time, the concentration and temperature of the flue gas cannot be adjusted, and downstream production cannot be carried out, which lacks flexibility; the products or slag discharged from the kiln head produced by calcination, incineration, and volatilization smelting in the rotary kiln are cooled by water quenching or a cooling production device cooler or cooling kiln is used to cool the products or slag, and a preheater or preheating furnace is built at the kiln tail to preheat the raw materials, which has a complex structure, high power consumption, large investment, and high operating cost.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multifunctional rotary kiln production line, comprising a production line body, the production line body comprising a rotary kiln body, a kiln head, a kiln tail, a kiln tail box, several groups of reverse surface coolers, several groups of forward surface coolers, a pulse dust collector, a kiln head combustion chamber, a dust collecting chamber, a temperature meter and an induced draft fan, the rotary kiln body comprising a kiln tail part, the rotary kiln body is connected to one end of the kiln tail box through the kiln tail, the surface of the kiln tail box is connected to the bottom end of a group of reverse surface coolers through a kiln tail box water tank, a group of reverse surface coolers is provided with a silo at the lower part, the silo is connected to one end of the next group of reverse surface coolers, several groups of reverse surface coolers are connected in series, the last group of reverse surface coolers is connected to a two-way regulating cooler, and the three groups of two-way regulating coolers are respectively connected to three sets of air outlet pipes; the rotary kiln body comprises a kiln head part, the kiln head has a plurality of reverse surface coolers, and the three groups of reverse surface coolers are respectively connected to three sets of air outlet pipes. The rotary kiln body is connected to a flue gas collecting pipe, the kiln body of the rotary kiln is connected to the end opposite to the kiln head combustion chamber through the flue gas collecting pipe, the upper part of the kiln head combustion chamber is connected to one end of the dust collecting chamber through a temperature-resistant connecting pipe, a temperature meter is installed on the pipe body of the forward surface cooler, the surface of the forward surface cooler is connected with a forward herringbone pipe, the forward surface cooler is connected to a dust collecting chamber cooling water tank through a forward herringbone pipe, the forward surface cooler is connected to a two-way regulating cooler through a silo, the two-way regulating cooler is connected to an air inlet of a pulse dust collector through an air outlet pipe, the two-way regulating cooler is connected to a reverse surface cooler through a silo at its lower part, the flue gas collecting pipe is made of heat-resistant stainless steel or refractory material, the kiln head combustion chamber is connected to the dust collecting chamber through a heat-resistant connecting pipe, and the heat-resistant connecting pipe is made of high-temperature resistant stainless steel or refractory material.

[0006] As a preferred technical solution of the present invention, the bottom of the kiln head combustion chamber is connected to a track, and the kiln head combustion chamber moves on the track by external force.

[0007] As a preferred technical solution of the present invention, the bottoms of the several groups of reverse surface coolers, the several groups of forward surface coolers and the three groups of two-way regulating coolers are respectively installed with herringbone pipe valves, and a silo valve is installed between the silo and the next silo.

[0008] As a preferred technical solution of the present invention, a pulse dust collector air inlet is provided at one end of the pulse dust collector, and the pulse dust collector air inlet of the pulse dust collector is connected to three groups of two-way regulating coolers through three groups of outlet pipes, respectively, and an outlet pipe valve is provided in the middle of the outlet pipe; the two ends of the side groups of the three groups of two-way regulating coolers are respectively connected to the reverse surface cooler and the forward surface cooler, and the other end of the pulse dust collector is provided with a pulse dust collector air outlet, which is connected to the clean air pipe, and then connected to the induced draft fan, and finally leads to the exhaust gas treatment system.

[0009] As a preferred technical solution of the present invention, a detachable burner is installed inside the kiln head. When the rotary kiln body is used for calcining, coal gas or natural gas passes through the detachable burner to ignite the fire source to calcine the materials in the rotary kiln body.

[0010] As a preferred technical solution of the present invention, a grate installation position is provided at the lower part of the kiln head combustion chamber. When the production line is used for drying materials, a detachable grate is installed in the kiln head combustion chamber. The kiln head combustion chamber uses coal or biomass fuel for combustion to generate high-temperature flue gas which enters the rotary kiln body to dry the wet material from the discharge pipe at the kiln tail. The flue gas enters the reverse surface cooler from the kiln tail box for cooling, and the opening and closing of each valve are controlled to control the flue gas cooling area and the flue gas temperature entering the pulse dust collector to avoid condensation due to too low flue gas or burning of the bag due to too high flue gas.

[0011] As a preferred technical solution of the present invention, a feed pipe is fixedly installed in the kiln tail box, and the preheating cylinder at the kiln tail section serves as a preheating section for materials entering the rotary kiln body from the feed pipe to preheat the materials; the rotary kiln body is slightly negative pressure, and air enters the rotary kiln body from the kiln head space to participate in the process. As mentioned above, a kiln head section cooling cylinder is added, and the hot materials in the kiln directly exchange heat with the air, and the hot air enters the kiln to participate in the process, which can save fuel and optimize the temperature conditions of the material reaction in the kiln body; the added kiln tail section preheating cylinder is heated by hot air outside, and then the material is heated by heat conduction through the stainless steel wall of the cylinder, so that the material entering the kiln from the feed pipe is heated from the outside, and at the same time, the material exchanges heat with the hot flue gas and tail gas in the rotary kiln body in the kiln tail section preheating cylinder, so that the material is doubly heated inside and outside the kiln.

[0012] As a preferred technical solution of the present invention, a kiln head cooling cylinder is provided on one side of the rotary kiln body, a kiln tail preheating cylinder is provided on the other side of the rotary kiln body, the outer sides of the kiln head cooling cylinder and the outer sides of the kiln tail preheating cylinder are both provided with insulation jackets, a blower is provided on one side of the rotary kiln body, one side of the blower is connected to one end of the insulation jacket, a hot air collecting annular sleeve is provided on the outer side of the kiln head cooling cylinder, a hot air distribution annular sleeve is provided on the outer side of the kiln tail preheating cylinder, and the rotary kiln body is increased in length compared with the conventional kiln body design. The kiln head cooling cylinder and the kiln tail preheating cylinder, the added cylinder is made of heat-resistant stainless steel, and the middle section of the rotary kiln body is lined with refractory bricks; the kiln head cooling cylinder serves as the cooling section for the hot materials in the rotary kiln body. Through heat exchange between the inner and outer surfaces of the cylinder, the hot materials in the rotary kiln body are cooled to the temperature required by the process, and are directly packaged or enter the next process. An insulation jacket is set outside the cylinder, and the blower blows air into the insulation jacket for forced ventilation and cooling. After heat exchange, the hot air is collected by the hot air collecting annular sleeve, and the hot air flows to the hot air distribution annular sleeve of the kiln tail preheating cylinder.

[0013] As a preferred technical solution of the present invention, one side of the kiln tail box is fixedly connected with a kiln tail herringbone connecting pipe, and the kiln tail box is connected to a kiln tail box water tank through the kiln tail herringbone connecting pipe.

[0014] The present invention discloses a method for regulating the temperature of dust-collecting flue gas in a multifunctional rotary kiln production line, comprising the following steps: Step 1: Design the ring system: the kiln head, kiln tail, kiln tail box, reverse surface cooler, forward surface cooler, two-way adjustment cooler, pulse dust collector, kiln head combustion chamber, flue gas collection pipeline, dust collection chamber and temperature meter together constitute the ring system; Step 2: Flue gas temperature adjustment: According to the process requirements of the pulse dust collector for the inlet temperature, by controlling the opening and closing and opening degree of each valve such as the silo valve, the herringbone pipe valve, and the exhaust pipe valve, the number of flue gas passing through the cooler is controlled, and the size of the flue gas cooling area is determined so that the flue gas temperature entering the pulse dust collector meets the requirements. After being filtered by the pulse dust collector, the flue gas is discharged from the outlet of the pulse dust collector into the clean air pipe, and then enters the flue gas environmental protection treatment system for treatment and discharge after meeting the standards.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The process characteristics of the present invention are that it has the functions of both downstream and upstream rotary kilns, which can be switched midway or used simultaneously according to the process requirements. It can be used as a volatilization kiln for smelting in the metallurgical field, as a calcination or incineration kiln for solid waste or garbage in the environmental protection field, and can also be used as a drying kiln. At the same time, the temperature of high-temperature flue gas can be adjusted. It has multiple functions and is suitable for the processing process requirements of multiple fields and multiple materials. It is flexible and simple, and saves energy and investment. 2. The invention adjusts the flue gas cooling area at any time and controls the flue gas flow rate by controlling the opening of the valve, so that the flue gas temperature and flow rate entering the pulse dust collector meet the process requirements, avoiding condensation due to low flue gas or burning of the bags due to high flue gas, and achieving adjustable high-temperature flue gas temperature and adjustable flue gas flow direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the main view of the general diagram of the production line of the present invention; Figure 2 It is a top view of the general diagram of the production line of the present invention; Figure 3 This is a front view of the waste heat utilization system of the present invention; Figure 4 A top view of the waste heat utilization system of the present invention; Figure 5 This is the main view of the cooling and dust collection system of the present invention; Figure 6 This is a front view of the connection of the components of the pulse dust collector of the present invention; Figure 7 It is a top view of the connection of the components of the pulse dust collector of the present invention; Figure 8 It is a left side view of the connection of the components of the pulse dust collector of the present invention; Fig. 9 This is a front view of the connection of the kiln head part of the present invention; Fig.10 It is a flow chart of the present invention.

[0017] In the figure: 1. Rotary kiln body; 2. Kiln head; 3. Kiln tail; 4. Kiln tail box; 5. Reverse surface cooler; 6. Forward surface cooler; 7. Pulse dust collector; 8. Kiln head combustion chamber; 9. Dust collecting chamber; 10. Thermometer; 11. Silo valve; 12. Induced draft fan; 13. Silo; 14. Herringbone pipe valve; 15. Exhaust pipe valve; 16. Clean air pipe; 17. Pulse dust collector air inlet; 18. Pulse dust collector air outlet; 19. Flue gas collection pipe; 20. Heat-resistant Connecting pipes; 21. Tracks; 22. Forward herringbone pipes; 23. Dust chamber cooling water tank; 24. Removable burner; 25. Grate; 26. Feeding pipe; 27. Herringbone connecting pipe at the kiln tail; 28. Water tank at the kiln tail; 29. ​​Cooling cylinder at the kiln head section; 30. Preheating cylinder at the kiln tail section; 31. Insulation jacket; 32. Blower; 33. Hot air collecting annular sleeve; 34. Two-way adjustable cooler; 35. Production line body; 36. Hot air distribution annular sleeve; 37. Exhaust pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-10 The present invention provides a multifunctional rotary kiln production line, including a production line body 35, the production line body 35 includes a rotary kiln body 1, a kiln head 2, a kiln tail 3, a kiln tail box 4, a plurality of reverse surface coolers 5, a plurality of forward surface coolers 6, a pulse dust collector 7, a kiln head combustion chamber 8, a dust collecting chamber 9, a temperature measuring instrument 10 and an induced draft fan 12, one end of the rotary kiln body 1 is connected to one end of the kiln tail 3, the rotary kiln body 1 is connected to one end of the kiln tail box 4 through the kiln tail 3, and the kiln tail box 4 is connected to the bottom of a group of reverse surface coolers 5 through a kiln tail box water tank 28. The bottom end of a group of reverse surface coolers 5 is provided with a silo 13, each silo 13 is equipped with a temperature measuring instrument 10, the silo 13 is connected to one end of the next group of reverse surface coolers 5, and several groups of reverse surface coolers 5 are arranged in series. The last reverse surface cooler 5 is connected to the group closest to the three groups of two-way regulating coolers 34 through the silo 13. The three groups of two-way regulating coolers 34 are respectively connected to the three groups of outlet pipes 37, and the three groups of outlet pipes 37 are connected to the pulse dust collector air inlet 17 of the pulse dust collector. The middle of the outlet pipe 37 is provided with The other end of the rotary kiln body 1 is connected to the kiln head 2, and the interior of the kiln head 2 is fixedly connected with a smoke collecting pipe 19. The rotary kiln body 1 is connected to the end of the kiln head combustion chamber 8 directly opposite to the kiln head combustion chamber through the smoke collecting pipe 19. The upper part 8 of the kiln head combustion chamber is connected to one end of the dust collecting chamber 9 through a temperature-resistant connecting pipe 20. The forward surface cooler 6 is connected to the dust collecting chamber cooling water tank 23 through a forward herringbone pipe 22. A group of forward surface coolers 6 are provided with a silo 13 at the bottom end, each silo 13 is equipped with a temperature measuring instrument 10, and the silo 13 is connected to the next One end of a group of forward surface coolers 6 is connected, and several groups of forward surface coolers 6 are arranged in series. The last forward surface cooler 6 is connected to a group of three groups of two-way adjustable coolers 34 through a silo 13. The two-way adjustable cooler 34 is connected to the pulse dust collector air inlet 17 of the pulse dust collector 7 through an air outlet pipe 37; the flue gas collection pipe 19 is made of heat-resistant stainless steel or refractory materials, and the kiln head combustion chamber 8 is connected to the dust collecting chamber 9 through a heat-resistant connecting pipe 20, and the heat-resistant connecting pipe 20 is made of high-temperature resistant stainless steel or refractory materials.

[0020] The bottom end of the kiln head combustion chamber 8 is connected to a track 21 , and the kiln head combustion chamber 8 moves on the track 21 by external force.

[0021] A herringbone pipe valve 14 is installed at the bottom of several groups of reverse surface coolers 5, several groups of forward surface coolers 6 and three groups of two-way adjustable coolers 34, a silo valve 11 is installed between the silo 13 and the next silo 13, an outlet pipe valve 15 is installed in the middle of the outlet pipe 37, and each silo 13 is installed with a temperature measuring instrument 10.

[0022] A pulse dust collector air inlet 17 is provided at one end of the pulse dust collector 7, and the pulse dust collector air inlet 17 of the pulse dust collector 7 is respectively connected to three groups of air outlet pipes 37, and the three groups of air outlet pipes 37 are respectively connected to three groups of two-way adjustment coolers. A pulse dust collector air outlet 18 is provided at the other end of the pulse dust collector 7.

[0023] A detachable burner 24 is installed on the surface of the kiln head 2. When the rotary kiln body 1 is used for calcining, coal gas or natural gas passes through the detachable burner 24 to ignite a fire source for calcining.

[0024] A grate 25 is provided at the lower part of the kiln head combustion chamber 8. When the present production line is used for drying materials, the kiln head combustion chamber 8 is installed with a detachable grate 25. The kiln head combustion chamber 8 uses coal or biomass fuel for combustion to generate high-temperature flue gas which enters the rotary kiln body 1 to dry the wet materials from the discharge pipe 26 on the kiln tail 3. The flue gas enters the reverse surface cooler 5 from the kiln tail box 4 for cooling, and controls the opening and closing of the valve, thereby controlling the flue gas cooling area and the flue gas temperature entering the pulse dust collector 7 to avoid condensation due to the flue gas being too low or burning the bag due to the flue gas being too high.

[0025] A feed pipe 26 is fixedly installed in the kiln tail box 4, and the kiln tail section preheating cylinder 30 serves as a preheating section for the material entering the rotary kiln body 1 from the feed pipe 26 to preheat the material; the rotary kiln body 1 is slightly negative pressure, and air enters the rotary kiln body 1 from the kiln head 2 space to participate in the process. As mentioned above, the kiln head section cooling cylinder 29 is added, and the hot material in the kiln directly exchanges heat with the air, and the hot air enters the kiln to participate in the process, which can save fuel and optimize the temperature conditions of the material reaction in the kiln body; the added kiln tail section preheating cylinder 30 is heated by hot air on the outside, and then the material is heated by heat conduction through the stainless steel wall of the cylinder, so that the material entering the kiln from the feed pipe is heated from the outside, and at the same time, the material exchanges heat with the hot flue gas and tail gas in the rotary kiln body 1 in the kiln tail section preheating cylinder 30, so that the material is heated both inside and outside the kiln.

[0026] A kiln head section cooling cylinder 29 is provided on one side of the rotary kiln body 1, and a kiln tail section preheating cylinder 30 is provided on the other side of the rotary kiln body 1. The outer sides of the kiln head section cooling cylinder 29 and the kiln tail section preheating cylinder 30 are both sleeved with a heat preservation jacket 31. A blower 32 is provided on one side of the rotary kiln body 1, and one side of the blower 32 is connected to one end of the heat preservation jacket 31. A hot air collecting annular sleeve 33 is provided on the outer side of the kiln head section cooling cylinder 29, and a hot air distributing annular sleeve 36 is provided on the outer side of the kiln tail section preheating cylinder 30. The rotary kiln body 1 increases the kiln head section cooling cylinder 29 and the kiln tail section preheating cylinder 30 in the conventional kiln body design length. The preheating cylinder 30 is added with heat-resistant stainless steel, and the middle section of the rotary kiln body 1 is lined with refractory bricks; the cooling cylinder 29 of the kiln head section serves as the cooling section of the hot materials in the rotary kiln body 1. Through heat exchange between the inner and outer surfaces of the cylinder, the hot materials in the rotary kiln body 1 are cooled to the temperature required by the process, and are directly packaged or enter the next process. An insulation jacket 31 is arranged outside the cylinder, and a blower 32 blows air into the insulation jacket 31 for forced ventilation cooling. After heat exchange, the hot air is collected by the hot air collecting annular sleeve 33, and the hot air flows to the hot air distribution annular sleeve 33 of the preheating cylinder 30 of the kiln tail section.

[0027] A kiln tail box water tank 28 is installed on the kiln tail box 4, and a kiln tail herringbone connecting pipe 27 is fixedly connected to one side of the kiln tail box water tank 28.

[0028] The present invention discloses a method for regulating the temperature of dust-collecting flue gas in a multifunctional rotary kiln production line, comprising the following steps: Step 1, design a ring system: kiln head 2, kiln tail 3, kiln tail box 4, reverse surface cooler 5, forward surface cooler 6, two-way adjustment cooler 34, pulse dust collector 7, kiln head combustion chamber 8, flue gas collection pipeline 19, dust collection chamber 9 and temperature measuring instrument 10 together constitute a ring system; Step 2, flue gas temperature regulation: according to the process requirements of the pulse dust collector 7 for the inlet temperature, by controlling the opening and closing and opening degree of each valve such as the silo valve 11, the herringbone pipe valve 14, the exhaust pipe valve 15, etc., the number of flue gas passing through the cooler is controlled, and the size of the flue gas cooling area is determined, so that the flue gas temperature entering the pulse dust collector 7 meets the requirements. After being filtered by the pulse dust collector 7, the flue gas is discharged from the pulse dust collector outlet 18 into the clean air pipe 16, and then enters the flue gas environmental protection treatment system for treatment and discharge after meeting the standards.

[0029] Embodiment 1: In the present invention, a kiln head 2, a kiln tail 3, a kiln tail box 4, a reverse surface cooler 5, a forward surface cooler 6, a two-way adjustment cooler 34, a pulse dust collector 7, a kiln head combustion chamber 8, a flue gas collecting pipe 19, a dust collecting chamber 9 and a temperature measuring instrument 10 together form an annular system; according to the process requirements of the pulse dust collector 7 for the inlet temperature, by controlling the opening and closing and the opening degree of each valve such as the silo valve 11, the herringbone pipe valve 14, and the outlet pipe valve 15, the number of flue gas passing through the cooler is controlled, and the size of the flue gas cooling area is determined, so that the flue gas temperature entering the pulse dust collector 7 meets the requirements, and it is avoided that the flue gas is too low to condense or too high to burn the bag. After passing through the pulse dust collector 7, the flue gas is discharged from the pulse dust collector outlet 18 into the clean air pipe 16, and then enters the flue gas environmental protection treatment system for treatment to meet the standards before being discharged; during reverse incineration or calcination, the flue gas enters the kiln tail box 4 from the rotary kiln body 1, and the kiln tail box 4 collects the rotary kiln gas. The flue gas in the kiln body 1 and the coarse particles in the flue gas are settled and preliminarily cooled here. The flue gas enters the reverse surface cooler 5 from the kiln tail box water tank 28 through the kiln tail herringbone connecting pipe 27 for further cooling. The kiln head combustion chamber 8 uses coal and other fuels to burn, and the high-temperature flue gas enters the rotary kiln body 1 to dry the wet materials from the kiln tail 3 loading and unloading pipes 26. The flue gas enters the reverse surface cooler 5 from the kiln tail box 4 for cooling, and then the flue gas dust is collected. During the forward incineration or calcination, the flue gas enters the kiln head combustion chamber 8 through the flue gas collecting pipe 19. The kiln head combustion chamber 8 collects the unburned flue gas in the rotary kiln body 1 for further combustion. At the same time, the kiln head combustion chamber 8 also acts as a settling chamber, and then enters the dust collecting chamber 9 through the temperature-resistant connecting pipe 20. In the dust collecting chamber 9, the coarse particles of smoke and dust settle and the flue gas is preliminarily cooled. The flue gas enters the forward surface cooler 6 from the dust collecting chamber cooling water tank 23 through the forward herringbone pipe 22 for further cooling.

[0030] Embodiment 2: In the present invention, the kiln head 2 of the rotary kiln body 1 is provided with a kiln head cooling cylinder 29, the kiln head cooling cylinder 29 is provided with an insulation jacket 31 and a hot air collecting ring sleeve, the kiln tail 3 is provided with a kiln tail preheating cylinder 30, the kiln tail preheating cylinder 30 is provided with an insulation jacket 31 and a hot air collecting ring sleeve 33, the rotary kiln body 1 adopts a refractory brick lined structure, the kiln tail 3 of the rotary kiln body 1 is connected to the kiln tail box 4, the kiln tail box 4 is connected to the reverse surface cooler 5, a silo 13 is provided below the reverse surface cooler 5, the silo 13 is connected to the next group of reverse surface coolers 5, the silo 13 is automatically controlled or manually controlled by a valve, that is, a silo valve 11, a control valve is provided at the connection between the reverse surface cooler 5 and the silo 13, that is, a herringbone pipe valve 14, a group of reverse surface coolers 5 are connected in series, and the reverse surface cooler 5 adopts A herringbone pipeline, the last one of the reverse surface coolers 5 is connected to the two-way regulating cooler 34, the two-way regulating coolers 34 are connected to adjacent two-way regulating coolers 34, the two-way regulating cooler 34 is provided with a silo 13, the silo 13 is automatically controlled or manually controlled by a valve, that is, the silo valve 11, the connection between the two-way regulating cooler 34 and the silo 13 is provided with a control valve, that is, the herringbone pipeline valve 14, the two-way regulating cooler 34 is respectively connected to the exhaust pipe, the exhaust pipe is respectively connected to the pulse dust collector air inlet 17, the pulse dust collector 7 is provided with a pulse dust collector air inlet 17 and a pulse dust collector air outlet 18, the exhaust pipe is provided with an exhaust pipe valve 15, the pulse dust collector air outlet 18 is connected to the clean air pipe 37, the clean air pipe 16 is connected to the induced draft fan 12, and the induced draft fan 12 is connected to the flue gas treatment system.

[0031] Embodiment 3: In the present invention, during the drying production, a grate 25 is installed at the lower part of the kiln head combustion chamber 8, and the temperature-resistant connecting pipe 20 and the valve at the upper part of the kiln head combustion chamber 8 are closed.

[0032] Embodiment 4: In the present invention, during calcination production, it is necessary to use coal gas or natural gas for heating and calcination, remove the connecting ring between the kiln head combustion chamber 8 and the temperature-resistant connecting pipe 20 and the connecting ring with the flue gas collection pipe 19, use external force to move the kiln head combustion chamber 8, the kiln head combustion chamber 8 moves along the track 21 to the specified position, and install the detachable burner 24 in the flue gas collection pipe 19.

[0033] Embodiment 5: The forward surface cooler 6, reverse surface cooler 5, silo 13, two-way adjustment cooler 34, outlet pipe, pulse dust collector air inlet 17 and pulse dust collector air outlet 18 in the present invention are all provided with a thermometer 10, and the opening and closing of the valve is controlled according to the temperature of the thermometer 10 and the production process needs and temperature requirements.

[0034] Embodiment 6: In the present invention, for the drying production process, as the connection mode of each part of the production line of Examples 1-5, the grate 25 is installed at the lower part of the kiln head combustion chamber 8, the valve of the temperature-resistant connecting pipe 20 at the upper part of the kiln head combustion chamber 8 is closed, the herringbone pipe valve 14 of the two-way regulating cooler 34 is opened, the outlet pipe valve 15 of the outlet pipe is opened, the outlet pipe valve 15 of other outlet pipes is closed, the silo valve 11 of the silo 13 between the two-way regulating coolers 34 is closed, the silo valve 11 of the lower silo 13 of the remaining reverse surface coolers 5 is opened, the herringbone pipe valves 14 of all other reverse surface coolers 5 are closed, the rotary kiln body 1 is started, and the rotary kiln body 1 is waited for the return After the rotary kiln body 1 rotates normally, the biomass particles in the kiln head combustion chamber 8 are ignited, the pulse dust collector 7 is started, and the induced draft fan 12 is started. Under the action of the induced draft fan 12, the hot flue gas flows from the kiln head combustion chamber 8 through the flue gas collecting pipe 19 into the rotary kiln body 1, and then flows into the kiln tail box 4, the kiln tail herringbone connecting pipe 27, and the silo 13 under the reverse surface cooler 5 in sequence. The hot flue gas passes through the remaining silos 13, the two-way adjustment cooler 34, and the exhaust pipe in sequence. The hot flue gas then enters the pulse dust collector 7 from the pulse dust collector air inlet 17, is filtered into clean gas, and is transported by the clean gas pipe 16 through the induced draft fan 12 and discharged into the desulfurization and tail gas treatment system;When the temperature in the rotary kiln body 1 reaches the required temperature, the feeding operation starts from the feed pipe 26. The wet material enters the preheating cylinder 30 of the kiln tail section, the rotary kiln body 1, and the cooling cylinder 29 of the kiln head section from the feed pipe 26 in sequence for drying. At the same time, the blower 32 is started to collect waste heat to participate in the preheating of the preheating cylinder 30 of the kiln tail section and the material in the kiln. The hot flue gas and the wet material flow in opposite directions, and the two exchange heat. The material is gradually dried, and the temperature of the hot flue gas is gradually reduced to become wet hot flue gas. The temperature measuring instrument 10 monitors the flue gas temperature, and the cooling area is determined according to the temperature. The reverse number of the corresponding sets of cooling area to be increased is opened. The herringbone pipe valve 14 of the surface cooler 5 is turned on. If the cooling area is not enough to cool the flue gas to the required temperature, the two-way regulating cooler 34 and the outlet pipe 37 are continuously activated in sequence, the corresponding herringbone pipe valve 14 is opened, and the corresponding silo valve 11 is closed until the flue gas temperature requirement of the pulse dust collector 7 is reached. The dried material is discharged from the kiln head 2 and transported to the next process. This process is a reverse production process and is used for the incineration production process. For example, the connection method of the various parts of the production line of Example 1-2, the silo valve 11 of the temperature-resistant connecting pipe 20 at the upper part of the kiln head combustion chamber 8 is in an open state. The herringbone pipe valve 14 of the downstream surface cooler 6 is in a closed state, the silo valves 11 of the corresponding silos 13 of all the downstream surface coolers 6 are in an open state, the herringbone pipe valve 14 of the two-way regulating cooler 34 is in an open state, the silo valve 11 of the silo 13 between the two-way regulating coolers 34 is closed, the silo valve 11 of the gas outlet pipe is opened, the gas outlet pipe valve 15 of the gas outlet pipe 1 and the gas outlet pipe 2 are closed, the rotary kiln body 1 is started, and after the rotary kiln body 1 rotates normally, the pulse dust collector 7 is started, the combustible material is ignited, and the material is put into the discharge pipe 26, and the rotary kiln body 1 is started. The induced draft fan 12 starts the feeding operation from the feeding pipe 26. The incinerated raw materials roll from the preheating cylinder 30 of the kiln tail section to the rotary kiln body 1 and the cooling cylinder 29 of the kiln head section. The incinerated materials are discharged from the outlet of the kiln head 2 and transported to the specified position for stacking. Under the action of the induced draft fan 12, the incineration flue gas enters the kiln head combustion chamber 8 through the flue gas collection pipe 19. The incompletely burned flue gas continues to burn here. The heavy particulate matter falls to the bottom of the kiln head combustion chamber 8 and is regularly cleared out and stacked. The flue gas enters the dust collecting chamber 9 through the temperature-resistant connecting pipe 20. The heavy particulate matter settles here and is collected by the lower silo and cleaned regularly. Step 1: The flue gas further flows into the silo 13 under the forward surface cooler 6 through the herringbone connecting pipe of the dust collecting chamber 9, and the flue gas passes through the remaining silos 13, the two-way regulating cooler 34, and the exhaust pipe 16 in sequence. The flue gas then enters the pulse dust collector 7 from the pulse dust collector air inlet 17 and is filtered into clean gas, which is transported by the clean gas pipe 16 and discharged into the desulfurization and tail gas treatment system through the induced draft fan 12. This process is a forward production process; the temperature meter 10 monitors the flue gas temperature, determines the cooling area according to the temperature, and opens the number of forward surface coolers 6 that need to increase the cooling area accordingly. The herringbone pipe valve 14, if the cooling area is not enough to cool the flue gas to the required temperature, then continue to use the two-way regulating cooler 34 and the outlet pipe 37, the two-way regulating cooler 34 and the outlet pipe in sequence, open the corresponding herringbone pipe valve 14, and close the corresponding silo valve 11 until the temperature requirement of the flue gas of the pulse dust collector 7 is reached. This process is a forward production process. Observe the temperature rise and fall in the kiln head combustion chamber 8 and the dust collecting chamber 9, and observe the flue gas flow. When the temperature in the kiln head combustion chamber 8 exceeds 1000°C, and the temperature in the dust collecting chamber 9 exceeds 900°C; Step 2: refer to the forward cooling and dust collection operation process in the forward production process of step 1, start the reverse production process, and after the reverse production operation is stable, close the forward production process. The forward and reverse production processes are switched according to the production situation, or are enabled at the same time. By controlling the opening of the outlet duct 37 and the outlet duct valve 15 on the outlet duct 37, the flue gas temperature and the stability of the airflow are adjusted to ensure stable production; Step 3: For the volatilization smelting production process, the countercurrent production process is preferentially used, and the downstream production process is used as an auxiliary production process. The operation is performed in accordance with steps 1 and 2; Step 4: For the calcination production process, coal gas or natural gas is required for heating and calcination. The connecting ring between the kiln head combustion chamber 8 and the temperature-resistant connecting pipe 20 and the connecting ring with the flue gas collection pipe 19 are removed. The kiln head combustion chamber 8 is moved by external force. The kiln head combustion chamber 8 moves to a specified position along the track 21. The detachable burner 24 is installed in the flue gas collection pipe 19. The herringbone pipe valve 14 of the two-way regulating cooler 34 is opened, the outlet pipe valve 15 of the outlet pipe 37 is opened, the outlet pipe valve 15 on the outlet pipe 37 is closed, the silo valve 11 of the silo 13 between the two-way regulating cooler 34 is closed, and the remaining reverse surface coolers 5 are opened. The silo valve 11 of the silo 13 is closed, and the herringbone pipe valves 14 of all other reverse surface coolers 5 are closed. The rotary kiln body 1 is started. After the rotary kiln body 1 rotates normally, the pulse dust collector 7 is started, the induced draft fan 12 is started, the coal gas or natural gas valve is opened, and the detachable burner 24 is ignited. Under the action of the induced draft fan 12, the flue gas flows into the rotary kiln body 1, and then flows into the kiln tail box 4, the herringbone connecting pipe 27 at the kiln tail, and the silo 13 under the reverse surface cooler 5 in sequence. The flue gas passes through the remaining silos 13, the two-way adjustment cooler 34, and the exhaust pipe 37 in sequence. The flue gas then enters the pulse dust collector 7 from the pulse dust collector air inlet 17 and is filtered into clean gas. The gas pipeline 16 is transported through the induced draft fan 12 and discharged into the desulfurization and tail gas treatment system; the flame temperature of the detachable burner 24 is increased, and the material is fed from the feed pipe 26 to the rotary kiln body 1. When the inner wall temperature of the rotary kiln body 1 reaches the requirement, the raw materials are fed from the feed pipe 26 to the preheating cylinder 30 of the kiln tail section, the rotary kiln body 1, and the cooling cylinder 29 of the kiln head section for calcination. At the same time, the blower 32 is started to collect waste heat to participate in the preheating cylinder 30 of the kiln tail section and the preheating of the materials in the kiln. The flame and the flue gas flow in the opposite direction to the material. The raw materials are gradually calcined, and the flue gas flows in the above direction. The temperature meter 10 monitors the flue gas temperature, and the cooling area is determined according to the temperature. The opening needs to be increased. The herringbone pipe valve 14 of the reverse surface cooler 5 with a corresponding number of cooling areas, if the cooling area is not enough to cool the flue gas to the required temperature, then continue to use the two-way regulating cooler 34 and the gas outlet pipe 37 in sequence, open the corresponding herringbone pipe valve 14, and close the corresponding silo valve 11 until the flue gas temperature requirement of the pulse dust collector 7 is reached; according to the need for temperature regulation, decide whether the two-way regulating cooler 34 and the gas outlet pipe 37 are opened or closed or the opening size individually or in multiple ways, and then the flue gas that further meets the temperature requirement enters the air inlet 17 of the pulse dust collector, and the calcined product is discharged from the kiln head 2 and transported to the next process. This process is a reverse production process.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional rotary kiln production line, comprising a production line body (35), characterized in that: The production line body (35) comprises a rotary kiln body (1), a kiln head (2), a kiln tail (3), a kiln tail box (4), a plurality of reverse surface coolers (5), a forward surface cooler (6), a pulse dust collector (7), a kiln head combustion chamber (8), a dust collecting chamber (9), a temperature measuring instrument (10) and an induced draft fan (12). One end of the rotary kiln body (1) is connected to one end of the kiln tail (3), the rotary kiln body (1) is connected to one end of the kiln tail box (4) via the kiln tail (3), and the kiln tail box water tank on the kiln tail box (4) is provided with a kiln tail box. The box (28) is connected to the bottom end of a group of reverse surface coolers (5), the bottom end of a group of reverse surface coolers (5) is provided with a silo (13), the silo (13) is connected to one end of the next group of reverse surface coolers (5), and several groups of reverse surface coolers (5) are connected in series through the silo (13). The last group of reverse surface coolers is connected to a two-way regulating cooler (34) through the silo (13), and the two-way regulating cooler (34) is composed of three groups of the same structure connected in series; the other end of the rotary kiln body (1) is connected to The rotary kiln body (1) is connected to a kiln head (2), a fume collecting pipe (19) is fixedly connected to the kiln head (2), the kiln body (1) is connected to one end of the kiln head combustion chamber (8) directly opposite to the kiln head combustion chamber (8) through the fume collecting pipe (19), the surface of the kiln head combustion chamber (8) is connected to a temperature-resistant connecting pipe (20), the kiln head combustion chamber (8) is connected to one end of the dust collecting chamber (9) through the temperature-resistant connecting pipe (20), a temperature measuring instrument (10) is installed on the pipe body of the forward surface cooler (6), and the surface of the forward surface cooler (6) is connected to the temperature-resistant connecting pipe (20). The forward surface cooler (6) is connected to a dust chamber cooling water tank (23) via the forward surface cooler (6) and is connected to a bidirectional regulating cooler (34) via a silo (13). The bidirectional regulating cooler (34) is connected to a pulse dust collector air inlet (17) of a pulse dust collector (7) via an air outlet duct (37). The bidirectional regulating cooler 34 is connected to a reverse surface cooler (5) via a silo (13) at its lower portion.

2. A multifunctional rotary kiln production line according to claim 1, characterized in that: The bottom end of the kiln head combustion chamber (8) is connected to a track (21).

3. A multifunctional rotary kiln production line according to claim 1, characterized in that: The bottoms of the plurality of groups of reverse surface coolers (5), the plurality of groups of forward surface coolers (6), and the three groups of two-way regulating coolers (34) are respectively installed with herringbone pipeline valves (14), and a silo valve (11) is installed between a silo (13) and the next silo (13).

4. A multifunctional rotary kiln production line according to claim 1, characterized in that: A pulse dust collector air inlet (17) is provided at one end of the pulse dust collector (7), and the pulse dust collector air inlet (17) of the pulse dust collector (7) is connected to three groups of two-way regulating coolers (34) through three groups of outlet pipes (37), and an outlet pipe valve (15) is provided in the middle of the outlet pipes (37); the two ends of the side groups of the three groups of two-way regulating coolers (34) are connected to the reverse surface cooler (5) and the forward surface cooler (6), respectively; the other end of the pulse dust collector (7) is provided with a pulse dust collector air outlet (18), and the pulse dust collector air outlet (18) is connected to the clean air pipe (16), and the induced draft fan (12), and finally leads to the exhaust gas treatment system.

5. The multifunctional rotary kiln production line according to claim 1, characterized in that: A detachable burner (24) is mounted on the surface of the kiln head (2).

6. A multifunctional rotary kiln production line according to claim 1, characterized in that: A grate (25) is provided at the lower part of the kiln head combustion chamber (8).

7. The multifunctional rotary kiln production line according to claim 1, characterized in that: A kiln head section cooling cylinder (29) is provided on one side of the rotary kiln body (1), and a kiln tail section preheating cylinder (30) is provided on the other side of the rotary kiln body (1). The outer sides of the kiln head section cooling cylinder (29) and the outer sides of the kiln tail section preheating cylinder (30) are both provided with thermal insulation jackets (31). A blower (32) is provided on one side of the rotary kiln body (1), and one side of the blower (32) is connected to one end of the thermal insulation jacket (31). A hot air collecting annular sleeve (33) is provided on the outer side of the kiln head section cooling cylinder (29), and a hot air distributing annular sleeve (36) is provided on the outer side of the kiln tail section preheating cylinder (30).

8. The multifunctional rotary kiln production line according to claim 1, characterized in that: One side of the kiln tail box (4) is fixedly connected to a kiln tail herringbone connecting pipe (27), and the kiln tail box (4) is connected to a kiln tail box water tank (28) via the kiln tail herringbone connecting pipe (27).

9. A method for regulating dust collection flue gas temperature in a multifunctional rotary kiln production line according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, designing a ring system: a kiln head (2), a kiln tail (3), a kiln tail box (4), a reverse surface cooler (5), a forward surface cooler (6), a two-way regulating cooler (34), a pulse dust collector (7), a kiln head combustion chamber (8), a flue gas collection duct (19), a dust collecting chamber (9) and a temperature measuring instrument (10) together constitute a ring system; Step 2, flue gas temperature regulation: According to the process requirements of the pulse dust collector (7) for the inlet temperature, the number of flue gas coolers passing through is controlled by controlling the opening and closing and the opening degree of each valve such as the silo valve (11), the herringbone pipe valve (14), and the outlet pipe valve (15), and the size of the flue gas cooling area is determined so that the flue gas temperature entering the pulse dust collector (7) meets the requirements. After being filtered by the pulse dust collector (7), the flue gas is discharged from the pulse dust collector outlet (18) into the clean air pipe (16), and then enters the flue gas environmental protection treatment system for treatment and discharge after meeting the standards.

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