Device for distilling ammonia from waste gas of coke oven

Abstract

The utility model relates to a coke oven waste gas ammonia distillation device which comprises a vibration fluidized bed, a feeding port of the vibration fluidized bed is connected with an ammonium sulfate crystal centrifugal machine through a spiral feeder, a heating portion of the vibration fluidized bed is connected with an air heater, an air inlet of the air heater is connected with a hot air pipeline, and the hot air pipeline is connected to the bottom of a coke oven waste gas chimney. A top waste gas outlet of the vibration fluidized bed is connected with the cyclone separator and the cloth bag collector; a gas pipeline of the cloth bag collector is connected with the middle part of the coke oven waste gas chimney. According to the utility model, the coke oven waste gas with the temperature of more than 180 DEG C is led to the vibration fluidized bed to be used as hot air of the vibration fluidized bed, so that the vibration fluidized bed is dried. A steam heat exchange system is not needed in the ammonia distillation system, generation of a large amount of steam spent water is reduced, meanwhile, high-temperature coke oven waste gas is utilized, and energy waste is reduced. The ammonium sulfate production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonium sulfate preparation, in particular to a device for steaming ammonia from coke oven waste gas. Background Art

[0002] The production of ammonium sulfate adopts the saturated tower process. The steps are as follows: after the gas is sprayed and washed with the mother liquor of the saturated tower, the ammonia in the gas is absorbed to form ammonium sulfate crystals, which are transported to the crystallization tank by the crystallization pump, and then the ammonium sulfate crystals and the mother liquor are separated by a centrifuge. The separated ammonium sulfate crystals enter the vibrating fluidized bed through a screw feeder for drying. The hot air for drying ammonium sulfate in the fluidized bed is generated by heat exchange between air and steam at 170°C, and is sent to the vibrating fluidized bed by a hot air blower. The heat exchange efficiency is low, a large amount of waste steam is generated, resulting in energy waste and affecting the production cost of ammonium sulfate. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a device for steaming ammonia from coke oven waste gas, which reduces the production cost of ammonium sulfate and reduces energy waste.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for steaming ammonia from coke oven waste gas includes a vibrating fluidized bed. The feed inlet of the vibrating fluidized bed is connected to an ammonium sulfate crystal centrifuge through a screw feeder. The heating part of the vibrating fluidized bed is connected to a hot air blower. The air inlet of the hot air blower is connected to a hot gas pipeline, and the hot gas pipeline is connected to the bottom of the coke oven waste gas chimney. The waste gas outlet at the top of the vibrating fluidized bed is connected to a cyclone separator and a bag collector. The gas pipeline of the bag collector is connected to the middle of the coke oven waste gas chimney.

[0006] The hot gas pipeline extends into the interior of the coke oven waste gas chimney through a pipeline hole, and a vertically downward air inlet end is provided at the center of the coke oven waste gas chimney.

[0007] The hot gas pipeline between the coke oven waste gas chimney and the hot air blower is covered with heat-insulating cotton.

[0008] A hot gas valve is provided on the hot gas pipeline.

[0009] A seal is provided between the hot gas pipeline and the pipeline hole.

[0010] Compared with the existing technology, the beneficial effect of the utility model is:

[0011] The coke oven waste gas above 180°C of the utility model is led to the vibrating fluidized bed as the hot air of the vibrating fluidized bed to realize the drying of the vibrating fluidized bed. There is no need for a steam heat exchange system in the ammonia steaming system, which reduces the generation of a large amount of steam waste water. At the same time, the high-temperature coke oven waste gas is utilized to reduce energy waste and lower the production cost of ammonium sulfate. Description of the Drawings

[0012] Figure 1 This is a schematic structural view of the present utility model.

[0013] Figure 2 This is a schematic structural view of the intake end.

[0014] In the figure: vibrating fluidized bed 1, screw feeder 2, ammonium sulfate crystal centrifuge 3, hot air blower 4, hot air pipe 5, coke oven waste gas chimney 6, cyclone separator 7, bag collector 8, pipe hole 9, intake end 10, heat insulation cotton 11, hot air valve 12, seal 13. Detailed Description of the Preferred Embodiments

[0015] In the description of the present utility model, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0016] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0017] A device for steaming ammonia with coke oven waste gas includes a vibrating fluidized bed 1. The feed inlet of the vibrating fluidized bed 1 is connected to an ammonium sulfate crystal centrifuge 3 through a screw feeder 2. The heating part of the vibrating fluidized bed 1 is connected to a hot air blower 4. The air inlet of the hot air blower 4 is connected to a hot air pipe 5. The hot air pipe 5 is connected to the bottom of a coke oven waste gas chimney 6. The waste gas outlet at the top of the vibrating fluidized bed 1 is connected to a cyclone separator 7 and a bag collector 8. The gas pipe of the bag collector 8 is connected to the middle part of the coke oven waste gas chimney 6.

[0018] The hot air pipe 5 extends into the interior of the coke oven waste gas chimney 6 through the pipe hole 9, and a vertically downward intake end 10 is provided at the center of the coke oven waste gas chimney 6.

[0019] The hot air pipe between the coke oven waste gas chimney and the hot air blower is covered with heat insulation cotton 11.

[0020] A hot air valve 12 is provided on the hot air pipe.

[0021] A seal 13 is provided between the hot gas pipeline 5 and the pipeline hole 9.

[0022] The coke oven waste gas above 180°C is led to a vibrating fluidized bed as the hot air of the vibrating fluidized bed to achieve the drying of the vibrating fluidized bed.

[0023] To make the purpose, technical solution and technical effect of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. However, the embodiments described below are only part of the embodiments of the present utility model, not all of them. Combining the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present utility model. Embodiment

[0024] An apparatus for steaming ammonia with coke oven waste gas includes a vibrating fluidized bed 1. The feed inlet of the vibrating fluidized bed 1 is connected to a ammonium sulfate crystal centrifuge 3 through a screw feeder 2. The heating part of the vibrating fluidized bed 1 is connected to a hot air blower 4. The air inlet of the hot air blower 4 is connected to a hot gas pipeline 5. The hot gas pipeline 5 is connected to the bottom of a coke oven waste gas chimney 6. The hot gas pipeline 5 extends into the interior of the coke oven waste gas chimney 6 through a pipeline hole 9. A vertically downward intake end 10 is provided at the center of the coke oven waste gas chimney 6. The intake end 10 is in the shape of a horn with a larger bottom and a smaller top. A seal 13 is provided between the hot gas pipeline 5 and the pipeline hole 9. A hot gas valve 12 is provided on the hot gas pipeline. The hot gas pipeline between the coke oven waste gas chimney and the hot air blower is covered with heat-insulating cotton 11.

[0025] The waste gas outlet at the top of the vibrating fluidized bed 1 is connected to a cyclone separator 7 and a bag collector 8. The gas pipeline of the bag collector 8 is connected to the middle part of the coke oven waste gas chimney 6. Embodiment

[0026] An apparatus for steaming ammonia with coke oven waste gas includes a vibrating fluidized bed 1. The feed inlet of the vibrating fluidized bed 1 is connected to a ammonium sulfate crystal centrifuge 3 through a screw feeder 2. The heating part of the vibrating fluidized bed 1 is connected to a hot air blower 4. The air inlet of the hot air blower 4 is connected to a hot gas pipeline 5. The hot gas pipeline 5 is connected to the bottom of a coke oven waste gas chimney 6. The hot gas pipeline 5 extends into the interior of the coke oven waste gas chimney 6 through a pipeline hole 9. A vertically downward intake end 10 is provided at the center of the coke oven waste gas chimney 6. The intake end 10 is cylindrical. A seal 13 is provided between the hot gas pipeline 5 and the pipeline hole 9. A hot gas valve 12 is provided on the hot gas pipeline. The hot gas pipeline between the coke oven waste gas chimney and the hot air blower is covered with heat-insulating cotton 11.

[0027] The waste gas outlet at the top of the vibrating fluidized bed 1 is connected to a cyclone separator 7 and a bag collector 8. The gas pipeline of the bag collector 8 is connected to the middle part of the coke oven waste gas chimney 6.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for distilling ammonia from coke oven exhaust gas, characterized in that: The invention comprises a vibrating fluidized bed, wherein the feed port of the vibrating fluidized bed is connected to an ammonium sulfate crystal centrifuge through a screw feeder, the heating part of the vibrating fluidized bed is connected to a hot air blower, the air inlet of the hot air blower is connected to a hot air pipeline, the hot air pipeline is connected to the bottom of a coke oven waste gas chimney, the waste gas outlet at the top of the vibrating fluidized bed is connected to a cyclone separator and a bag collector, and the gas pipeline of the bag collector is connected to the middle of the coke oven waste gas chimney.

2. The device for distilling ammonia from coke oven exhaust gas according to claim 1, characterized in that: The hot gas pipeline extends into the interior of the coke oven waste gas chimney through the pipeline hole, and a vertically downward air intake end is arranged at the center of the coke oven waste gas chimney.

3. The device for distilling ammonia from coke oven exhaust gas according to claim 1, characterized in that: The hot air pipeline between the coke oven exhaust gas chimney and the hot air blower is coated with thermal insulation cotton.

4. The device for distilling ammonia from coke oven exhaust gas according to claim 1, characterized in that: The hot air pipeline is provided with a hot air valve.

5. The device for distilling ammonia from coke oven exhaust gas according to claim 1, characterized in that: A sealing member is provided between the hot air pipeline and the pipeline hole.

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