Double hearth kiln with steam power generation

Abstract

The application discloses a double-hearth kiln with a steam power generation mechanism and relates to the technical field of double-hearth kilns.The double-hearth kiln comprises a hearth, the inside of the hearth is sequentially provided with a preheating zone, a calcining zone and a cooling zone from top to bottom, a plurality of spray guns are uniformly and interval fixed in the preheating zone, the spray outlets of each spray gun are located in the calcining zone, a channel is installed on one side of the hearth, the top and bottom of the channel are fixed with refractory materials, a water tank is fixed in the middle of the channel, the water tank is a double-layer U-shaped tank made of stainless steel, cold water is injected into the outer layer away from the hearth, and the inner layer close to the hearth is used for heating, a steam power generation mechanism is installed on the outside of the hearth, the steam power generation mechanism is used for collecting steam in the water tank, the steam power generation mechanism converts steam waste heat into electric energy through a steam turbine, a kiln shell is fixed at the bottom of the hearth, a suspension cylinder is fixed on the kiln shell, the device can realize cooling, the heat of the device itself can be fully utilized to realize steam power generation, the production cost is reduced, and the use efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of double-chamber kiln technology, and in particular to a double-chamber kiln with a steam power generation mechanism. Background Technology

[0002] A double-chamber kiln is a common lime production equipment. It achieves combustion and cooling separation by having two independent kiln chambers work alternately, ensuring that limestone is fully decomposed and calcined to produce lime products with high activity and uniform composition. However, a large amount of heat is generated in the passage during the operation of a double-chamber kiln, and this heat is not fully utilized, resulting in a significant loss of heat resources during equipment operation. Utility Model Content

[0003] This application provides a double-chamber kiln with a steam power generation mechanism, which solves the problem in the prior art that a large amount of heat is generated in the passage during the operation of a double-chamber kiln, and this heat is not fully utilized, resulting in a significant loss of heat resources during equipment operation.

[0004] This application provides a double-chamber kiln with a steam power generation mechanism, including a kiln chamber, wherein a preheating zone, a calcination zone and a cooling zone are arranged sequentially from top to bottom inside the kiln chamber; Multiple spray guns are fixed at uniform intervals within the preheating zone, and the nozzle of each spray gun is located in the calcination zone. A channel is installed on one side of the kiln chamber. Refractory material is fixed to the top and bottom of the channel. A water tank is fixed in the middle of the channel. The water tank is a double-layered U-shaped stainless steel tank. Cold water is filled in the outer layer away from the kiln chamber, and the inner layer near the kiln chamber is used for heating. A steam power generation mechanism is installed on the outside of the kiln chamber. The steam power generation mechanism is used to collect steam in the water tank and convert the waste heat of the steam into electrical energy through a steam turbine.

[0005] Furthermore, a kiln shell is fixed at the bottom of the kiln chamber; A suspension cylinder is fixed on the kiln shell, and the kiln shell and the suspension cylinder are designed as a single unit. Both the kiln shell and the suspension cylinder are fixed with double-layered U-shaped water tanks.

[0006] Furthermore, reinforcing ribs are evenly spaced and fixed on the outer side of the kiln shell to enhance its structural strength.

[0007] Furthermore, a feeding device is installed at the top of the kiln chamber, which includes a cylinder, a screw conveyor shaft, and a hydraulic cylinder for lifting.

[0008] Furthermore, the cylinder is fixed to one side of the kiln chamber, and the spiral conveyor shaft is rotatably connected inside the cylinder. The lifting motor is used to drive the bolt conveyor shaft to rotate, which facilitates the conveying of limestone.

[0009] Furthermore, a hopper is fixed to the discharge end of the feeding device, and a distribution pipe is fixed below the hopper; The kiln chamber has two chambers, and there are two rotating hoppers below the distribution pipe. The discharge end of one rotating hopper extends into one of the kiln chambers.

[0010] Furthermore, multiple platforms are erected on the kiln chamber, steel ladders are installed between adjacent platforms, and an exhaust pipe is fixed to the top of the kiln chamber.

[0011] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: When the equipment is running, the heat generated is cooled through the water tanks in the kiln chamber and the kiln shell. The water in the tanks absorbs heat and then the steam generated in the tanks is collected by the steam power generation mechanism. The steam waste heat is then converted into electrical energy by the steam turbine. This can cool the equipment and make full use of the equipment's own heat to generate steam, reduce production costs, and improve efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic cross-sectional view of the double-chamber kiln with a steam power generation mechanism according to this utility model. Figure 2 This is a top view schematic diagram of the double-chamber kiln with a steam power generation mechanism according to this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the double-chamber kiln with a steam power generation mechanism according to this utility model. Figure 4 This is a front view cross-sectional structural diagram of the kiln shell of the double-chamber kiln with a steam power generation mechanism according to this utility model. Figure 5 This is a schematic diagram showing the relationship between the feeding device and the kiln chamber position of the double-chamber kiln with a steam power generation mechanism according to this utility model. Figure 6 This is a schematic diagram showing the positional relationship between the kiln chamber and the exhaust gas pipe of the double-chamber kiln with a steam power generation mechanism of this utility model.

[0013] In the diagram: 100, kiln chamber; 110, spray gun; 120, preheating zone; 130, calcination zone; 140, kiln shell; 150, feeding device; 160, hopper; 170, distribution pipe; 180, steel ladder; 190, exhaust pipe; 200, suspension cylinder; 210, passageway. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more comprehensive description of this application will be given below with reference to the accompanying drawings, which show preferred embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this utility model.

[0015] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] like Figures 1 to 4 As shown, this application provides a double-chamber kiln with a steam power generation mechanism, including a kiln chamber 100. The kiln chamber 100 is provided with a preheating zone 120, a calcination zone 130 and a cooling zone from top to bottom. The cooling zone is 7m long, the calcination zone 130 is 8m long and the preheating zone 120 is 6m long. Multiple spray guns 110 are fixed at uniform intervals within the preheating zone 120, and the nozzle of each spray gun 110 is located in the calcination zone 130. A channel 210 is installed on one side of the kiln chamber 100. The top and bottom of the channel 210 are fixed with refractory material, and the bottom one meter below the bottom of the channel 210 is also made of refractory material, which is heavy refractory brick. A water tank is fixed in the middle of the channel 210. The water tank is a double-layered U-shaped stainless steel tank. The outer layer away from the kiln chamber 100 is filled with cold water, and the inner layer near the kiln chamber 100 is used for heating. The outer layer of the water tank is 100mm wide and the inner layer is 400mm wide.

[0018] The sink is preferably made of stainless steel, but other high-temperature resistant steels are also acceptable. A steam power generation mechanism is installed on the outside of the kiln chamber 100. The steam power generation mechanism is fixed at the junction of the calcination zone 130 and the preheating zone 120. The steam power generation mechanism is used to collect steam in the water tank. The steam power generation mechanism converts the waste heat of the steam into electrical energy through a steam turbine.

[0019] Specifically, such as Figures 1 to 4 As shown, a kiln shell 140 is fixed to the bottom of the kiln chamber 100; A suspension cylinder 200 is fixed on the kiln shell 140. The kiln shell 140 and the suspension cylinder 200 are designed as a single unit, meaning that the kiln shell 140 and the suspension cylinder 200 are two parts that are assembled into a single structure for easy installation. The inner layer of the water tank in the suspension cylinder 200 has a width of 100mm and the outer layer has a width of 200mm. Both the kiln shell 140 and the suspension cylinder 200 are fixed with double-layer U-shaped water tanks. The cold water on the outer layer of the suspension cylinder 200 is preheated and then heated again before entering the inner layer of the water tank. A water tank is fixed on the outside of the kiln shell 140 to facilitate the addition of water to the water tanks inside the kiln shell 140 and the suspension cylinder 200.

[0020] It should be noted that the water tank of the kiln shell 140 is located 22.8 meters to 14.7 meters outside the kiln shell 140. Without affecting production, the heat of the kiln chamber 100 and the kiln shell 140 itself is fully utilized. The temperature of the channel 210 is about 1000℃, and the temperature of the outside of the kiln shell 140 is between 50℃ and 70℃. The temperature can be adjusted according to the actual situation during the later construction.

[0021] Specifically, such as Figures 1 to 4 As shown, reinforcing ribs are evenly spaced and fixed on the outer side of the kiln shell 140, which are used to enhance the structure of the kiln shell 140.

[0022] In the above embodiments, when the equipment is running, the heat generated can be cooled through a double-layer water tank. The cold water in the outer layer of the water tank is used for cooling. After absorbing heat, the temperature of the cold water rises. The heated water enters the inner layer of the water tank, which can reheat the water in the kiln chamber and reduce heat loss. Furthermore, the steam generated by the hot water in the inner layer of the water tank is collected by the steam power generation mechanism, and the waste heat of the steam is converted into electrical energy through the steam turbine. This can cool the equipment and make full use of the equipment's own heat to generate steam, thereby reducing production costs and improving efficiency.

[0023] In some embodiments of this application, such as Figures 1 to 6 As shown, a feeding device 150 is installed on one side of the kiln chamber 100. The feeding device 150 includes a cylinder, a screw conveyor shaft, and a hydraulic cylinder for lifting. The cylinder is fixed to one side of the kiln chamber 100, and the spiral conveying shaft is rotatably connected to the cylinder. The bottom of the cylinder is fixed with a feed inlet, into which limestone is fed. The top of the cylinder is fixed with a discharge outlet. The lifting motor is used to drive the bolt conveying shaft to rotate, which facilitates the conveying of limestone.

[0024] Specifically, such as Figure 5 As shown, a hopper 160 is fixed at the discharge end of the feeding device 150, and a distribution pipe 170 is fixed below the hopper 160. Limestone enters the distribution pipe 170 from the hopper 160. There are two kiln chambers 100, and two rotating hoppers are located below the distribution pipe 170. The discharge end of one rotating hopper extends into one kiln chamber 100.

[0025] Specifically, such as Figure 5 and Figure 6 As shown, the kiln chamber 100 is equipped with multiple platforms, and steel ladders 180 are installed between adjacent platforms. The steel ladders 180 facilitate personnel access to each platform. An exhaust pipe 190 is fixed to the top of the kiln chamber 100 for discharging exhaust gas.

[0026] In the above embodiment, limestone is poured into the feed inlet of the cylinder. The lifting motor drives the screw conveyor shaft to rotate, which transports the limestone upward and into the hopper 160 from the discharge port. After passing through the distribution pipe 170, it is divided into two kiln chambers 100. The flames sprayed by the spray gun 110 burn the material. As the material falls evenly, it can ensure that the material and fuel are in uniform contact, which can achieve uniform combustion of the material and improve the efficiency of the equipment.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, various modifications and variations are possible with this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-chamber kiln with a steam power generation mechanism, comprising a kiln chamber (100), characterized in that, The kiln chamber (100) is provided with a preheating zone (120), a calcination zone (130) and a cooling zone from top to bottom; Multiple spray guns (110) are fixed at uniform intervals within the preheating zone (120), and the nozzle of each spray gun (110) is located in the calcination zone (130). A channel (210) is installed on one side of the kiln chamber (100). Refractory material is fixed at the top and bottom of the channel (210). A water tank is fixed in the middle of the channel (210). The water tank is a double-layered U-shaped stainless steel tank. Cold water is filled in the outer layer away from the kiln chamber (100), and the inner layer near the kiln chamber (100) is used for heating. A steam power generation mechanism is installed on the outside of the kiln chamber (100). The steam power generation mechanism is used to collect steam in the water tank and convert the waste heat of the steam into electrical energy through a steam turbine.

2. The double-chamber kiln with a steam power generation mechanism as described in claim 1, characterized in that, The bottom of the kiln chamber (100) is fixed with a kiln shell (140). A suspension cylinder (200) is fixed on the kiln shell (140), and the kiln shell (140) and the suspension cylinder (200) are designed as a single unit; Both the kiln shell (140) and the suspension cylinder (200) are fixed with double-layer U-shaped water tanks.

3. The double-chamber kiln with a steam power generation mechanism as described in claim 2, characterized in that, The kiln shell (140) is fixed with reinforcing ribs at uniform intervals on the outside. The reinforcing ribs are used to enhance the structural strength of the kiln shell (140).

4. The double-chamber kiln with a steam power generation mechanism as described in claim 1, characterized in that, A feeding device (150) is installed on one side of the kiln chamber (100). The feeding device (150) includes a cylinder, a screw conveyor shaft, and a hydraulic cylinder for lifting.

5. The double-chamber kiln with a steam power generation mechanism as described in claim 4, characterized in that, The cylinder is fixed to one side of the kiln chamber (100), and the spiral conveying shaft is rotatably connected to the cylinder. The lifting motor is used to drive the bolt conveying shaft to rotate, which facilitates the conveying of limestone.

6. The double-chamber kiln with a steam power generation mechanism as described in claim 4, characterized in that, The feeding device (150) has a hopper (160) fixed at its discharge end, and a distribution pipe (170) is fixed below the hopper (160). The kiln chamber (100) has two chambers, and there are two discharge ends below the distribution pipe (170). One discharge end of the distribution pipe (170) extends into one of the kiln chambers (100).

7. The double-chamber kiln with a steam power generation mechanism as described in claim 1, characterized in that, Multiple platforms are mounted on the kiln chamber (100), and steel ladders (180) are installed between adjacent platforms. A waste gas pipe (190) is fixed on the top of the kiln chamber (100).

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