Coal charging and coke pushing low-temperature flue gas desulfurization device

Abstract

The utility model discloses a coal charging and coke pushing low-temperature flue gas desulfurization device, and belongs to the technical field of flue gas purification. Comprising a desulfurizing agent powder storage unloading tank, a high-density equipartition system, a star-shaped unloader, a Venturi ejector, a dry desulfurizing agent spray gun and a flue gas desulfurization reaction chamber which are connected in sequence, a flue gas pipeline of the coaling coke pusher is connected with the flue gas desulfurization reaction chamber; according to the device, the desulfurizing agent is subjected to heat preservation and accelerated uniform feeding, so that low-temperature flue gas in a coal charging and coke pushing link can be in full contact with the desulfurizing agent to generate an effective chemical reaction, and the aim of reducing the concentration of sulfur dioxide in the low-temperature flue gas is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas purification, in particular to a low-temperature flue gas desulfurization device for coal loading and coke pushing. Background Art

[0002] The flue gas emitted during the coal loading and coking process of the coke oven in the coking industry contains a large amount of high-concentration sulfur dioxide and particulate matter. The main bottleneck is that during the coal loading and coking process, since the door of the carbonization chamber is open during the period, a large amount of cold air from the outside rushes into the coke oven carbonization chamber, causing the indoor temperature to drop sharply. At this time, the coal cannot be fully burned, making the temperature of the emitted flue gas basically 80-120℃, causing the conventional calcium method, sodium method, magnesium method and ammonia method desulfurization processes to fail to meet the desulfurization operation requirements, resulting in high-concentration sulfur dioxide in the coal loading and coking process escaping into the atmosphere, causing regional environmental pollution. Utility Model Content

[0003] The utility model overcomes the shortcomings of the prior art and proposes a coal-loaded coke-pushing low-temperature flue gas desulfurization device, solving the problem of coal-loaded coke-pushing low-temperature flue gas desulfurization.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions.

[0005] A coal-loaded and coke-pushing low-temperature flue gas desulfurization device comprises a flue gas desulfurization reaction chamber and a desulfurizer conveying device, wherein the desulfurizer conveying device comprises a desulfurizer powder storage and unloading tank, a high-density equalization system, a star-shaped unloader, a venturi injector, and a dry desulfurizer spray gun; a discharge port is arranged at the bottom of the desulfurizer powder storage and unloading tank, the discharge port at the bottom of the desulfurizer powder storage and unloading tank is connected to the feed port at the top of the high-density equalization system, the discharge port at the bottom of the high-density equalization system is connected to the star-shaped unloader, the star-shaped unloader is connected to the venturi injector, the venturi injector is connected to the dry desulfurizer spray gun through a powder feeding pipe, and the dry desulfurizer spray gun is connected to the desulfurizer inlet of the flue gas desulfurization reaction chamber; the desulfurizer powder storage and unloading tank is connected to an automatic temperature control device; the high-density equalization system comprises a shell and a feeding pipe bundle arranged in the shell, and the feeding pipe bundle is composed of a plurality of vertical feeding pipes converging.

[0006] Furthermore, it also includes an automatic control system, which includes a PLC controller, and the PLC controller is connected to the desulfurizer powder storage and discharge tank, the star-shaped discharger, the venturi injector, and the dry desulfurizer spray gun respectively.

[0007] Furthermore, the desulfurizer powder storage and unloading tank is a seamless tank body made of stainless steel.

[0008] Furthermore, the desulfurization device is installed on a coal-loading and coke-pushing car, and the flue gas duct of the coal-loading and coke-pushing car is connected to the flue gas desulfurization reaction chamber.

[0009] The beneficial effects of the utility model compared with the prior art are:

[0010] Taking into account the disadvantages of small particle size of desulfurizer powder and the quality being affected by temperature, the utility model breaks the traditional concept of desulfurizer powder storage and adopts a stainless steel seamless tank body + automatic temperature control device. The stainless steel seamless tank body ensures that there is no rust or dust in the three links of unloading, storage and delivery, and the automatic temperature control device ensures that the desulfurizer powder is always kept in an environment of 30-60℃ to ensure that it does not agglomerate or deteriorate.

[0011] In order to ensure that the flue gas from coal loading and coke pushing is fully in contact with the flue gas, a high-density equal distribution system + accelerated fluidization system + flue gas desulfurization reaction chamber is equipped to ensure stable and efficient desulfurization efficiency. Among them: the high-density equal distribution system is mainly considered to be the small particle size of the desulfurizer. In order to ensure that the desulfurizer can be evenly supplied and prevent material escaping and uneven feeding, on the basis of the seamless shell, an equal distribution pipeline is arranged inside; the Venturi ejector uses the "Venturi" principle to speed up the desulfurizer evenly and stably, and improves its overall power. The flue gas desulfurization reaction chamber is the area where the flue gas and the desulfurizer are in reverse contact for chemical reaction. At the same time, the PLC fully automatic control system is used in electrical control to reduce the labor intensity of employees and improve the reliability and advancement of the equipment.

[0012] This device can keep the desulfurizer warm and accelerate the uniform feeding, so that the low-temperature flue gas in the coal loading and coke pushing process can fully contact with the desulfurizer, produce effective chemical reaction, and achieve the goal of reducing the sulfur dioxide concentration in the low-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the low-temperature flue gas desulfurization device for coal loading and coke pushing according to the utility model;

[0014] In the figure:

[0015] 1- desulfurizer powder storage and unloading tank; 2- high-density equal distribution system; 3- star-shaped unloader; 4- venturi injector; 5- dry desulfurizer spray gun; 6- flue gas desulfurization reaction chamber; 7- automatic control system; 8- automatic temperature control device; 9- feeding pipe bundle; 10- powder feeding pipe. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in combination with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solution of the present invention is described in detail below in combination with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0017] like Figure 1 As shown, this embodiment provides a coal-loaded coke-pushing low-temperature flue gas desulfurization device, which is mainly used for the desulfurization treatment of coal-loaded coke-pushing low-temperature flue gas; the device includes a flue gas desulfurization reaction chamber 6 and a desulfurizer conveying device, the desulfurizer conveying device includes a desulfurizer powder storage and unloading tank 1, a high-density equalization system 2, a star-shaped unloader 3, a venturi injector 4, a dry desulfurizer spray gun 5, and an automatic control system 7; the desulfurizer powder storage and unloading tank 1 is provided with a discharge port at the bottom, and the discharge port at the bottom of the desulfurizer powder storage and unloading tank 1 is connected to the top feed port of the high-density equalization system 2, and the high The discharge port at the bottom of the dense distribution system 2 is connected to the star-shaped discharger 3, the star-shaped discharger 3 is connected to the venturi injector 4, the venturi injector 4 is connected to the dry desulfurizer spray gun 5 through the powder feeding pipe 10, and the dry desulfurizer spray gun 5 is connected to the desulfurizer inlet of the flue gas desulfurization reaction chamber 6; the automatic control system 7 includes a PLC controller, the PLC controller is connected to the desulfurizer powder storage discharge tank 1, the star-shaped discharger 3, the venturi injector 4, and the dry desulfurizer spray gun 5, respectively, and the automatic control system 7 adopts PLC one-button full-automatic control. The entire desulfurization device is installed on a coal-loading coke-pushing car, and the flue gas pipeline of the coal-loading coke-pushing car is connected to the flue gas desulfurization reaction chamber 6.

[0018] Among them, considering the disadvantages that the desulfurizer powder has a small particle size and its quality is affected by temperature, an automatic temperature control device 8 is connected to the desulfurizer powder storage and unloading tank 1; the automatic temperature control device 8 ensures that the desulfurizer powder is always kept in an environment of 30-60°C without agglomeration or deterioration; the desulfurizer powder storage and unloading tank 1 adopts a seamless tank body made of stainless steel to ensure that there is no rust and dust in the three links of unloading, storage and transportation.

[0019] The high-density even distribution system 2 includes a shell and a feed pipe bundle 9 disposed in the shell, wherein the feed pipe bundle 9 is composed of a plurality of vertical feed pipes. The high-density even distribution system 2 is a special hopper feeding device designed independently to ensure that the desulfurizer can be evenly supplied and prevent material escaping and uneven feeding, based on the use of a seamless shell, and an equal distribution pipeline is arranged inside.

[0020] The Venturi injector 4 is a device for accelerating the desulfurizer uniformly and stably using the "Venturi" principle. Under the premise of providing pressure through the induced draft fan, the pipeline is designed using the "Venturi" principle to increase the flow rate of the desulfurizer powder, thereby improving its overall power, which is beneficial for the dry desulfurizer spray gun 5 to enter the flue gas desulfurization reaction chamber 6 and fully contact with the low-temperature flue gas in the coal loading and coke pushing link to produce an effective chemical reaction, thereby achieving the goal of reducing the sulfur dioxide concentration in the flue gas.

[0021] The device is small in size and light in weight. The total area of ​​the whole device is less than 10 square meters and the total weight is less than 1 ton. It can be directly installed on the coal-loading and coke-pushing car without affecting the overall load. It can easily guarantee a desulfurization efficiency of more than 90% for a flue gas volume of 100,000 m³ / h. The device can be moved with the car to ensure stable and efficient desulfurization operations in each carbonization chamber.

[0022] The above content is a further detailed description of the utility model in combination with a specific preferred implementation method. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the utility model, which should be regarded as belonging to the utility model and the scope of patent protection determined by the submitted claims.

Claims

1. A low-temperature flue gas desulfurization device for coal-loading and coke-pushing, comprising a flue gas desulfurization reaction chamber (6), characterized in that: The desulfurizer conveying device also includes a desulfurizer conveying device, which includes a desulfurizer powder storage and discharge tank (1), a high-density equalization system (2), a star-shaped discharger (3), a Venturi injector (4), and a dry desulfurizer spray gun (5); the desulfurizer powder storage and discharge tank (1) is provided with a discharge port at the bottom, the discharge port at the bottom of the desulfurizer powder storage and discharge tank (1) is connected to the feed port at the top of the high-density equalization system (2), the discharge port at the bottom of the high-density equalization system (2) is connected to the star-shaped discharger (3), and the star-shaped The discharger (3) is connected to a venturi injector (4), the venturi injector (4) is connected to a dry desulfurizing agent spray gun (5) via a powder feeding pipe (10), the dry desulfurizing agent spray gun (5) is connected to a desulfurizing agent inlet of a flue gas desulfurization reaction chamber (6); the desulfurizing agent powder storage discharge tank (1) is connected to an automatic temperature control device (8); the high-density equal distribution system (2) comprises a shell and a feeding pipe bundle (9) arranged in the shell, the feeding pipe bundle (9) is composed of a plurality of vertical feeding pipes.

2. A coal-charging and coke-pushing low-temperature flue gas desulfurization device according to claim 1, characterized in that: It also includes an automatic control system (7), which includes a PLC controller, and the PLC controller is connected to the desulfurizer powder storage and discharge tank (1), the star-shaped discharger (3), the Venturi injector (4), and the dry desulfurizer spray gun (5) respectively.

3. A coal-charging and coke-pushing low-temperature flue gas desulfurization device according to claim 1, characterized in that: The desulfurizer powder storage and unloading tank (1) is a seamless tank made of stainless steel.

4. A coal-charging and coke-pushing low-temperature flue gas desulfurization device according to claim 1, characterized in that: The desulfurization device is installed on a coal-loading and coke-pushing car, and the flue gas duct of the coal-loading and coke-pushing car is connected to the flue gas desulfurization reaction chamber (6).

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