阅读说明：本技术 有色冶炼用流化床煤气发生装置内脱硫化氢装置及方法 (Hydrogen sulfide removal device and method in fluidized bed gas generation device for nonferrous smelting ) 是由 徐阳 王志强 涂湘巍 钱芳 高义 戴庆伟 于 2020-04-17 设计创作，主要内容包括：本发明公开了一种有色冶炼用流化床煤气发生装置内脱硫化氢装置及方法,包括流化床煤气发生装置和用于将脱硫剂流化后喷入前述的煤气发生装置的喷射系统；在前述的煤气发生装置的上部连接设有旋风分离器,旋风分离器下部设有返料器连通至煤气发生装置下部形成循环通道；在前述的煤气发生装置侧面还设有煤粉仓,前述的煤粉仓设有煤粉螺旋给料器连通至煤气发生装置下部形成送料通道。本发明无需对原煤气发生进行较大改造,系统简单、成本低廉、无二次污染,在装置内实现SO<Sub>2</Sub>的超低排放。且本发明不对气化稳定性造成影响。另外,本发明脱硫化氢后不需对煤气进行降温后再脱硫,可直接向工艺设备供应热煤气,进一步节约降温设备投资及热能损失。(The invention discloses a device and a method for removing hydrogen sulfide in a fluidized bed gas generating device for nonferrous smelting, wherein the device comprises the fluidized bed gas generating device and an injection system for fluidizing a desulfurizing agent and then injecting the fluidized desulfurizing agent into the gas generating device; the upper part of the gas generating device is connected with a cyclone separator, and the lower part of the cyclone separator is provided with a material returning device communicated with the lower part of the gas generating device to form a circulating channel; the coal powder bin is also arranged on the side surface of the coal gas generating device and is provided with a coal powder spiral feeder which is communicated with the lower part of the coal gas generating device to form a feeding channel. The invention does not need to greatly reform the raw gas generation, has simple system, low cost and no secondary pollution, and realizes SO in the device 2 Ultra-low emission. And the invention does not affect gasification stability. In addition, the first and second substrates are,the invention does not need to cool the coal gas and then desulfurize after removing the hydrogen sulfide, can directly supply hot coal gas to process equipment, and further saves the investment of cooling equipment and the loss of heat energy.)

1. A hydrogen sulfide removal device in a fluidized bed gas generation device for nonferrous smelting is characterized in that: comprises a fluidized bed coal gas generating device (5) and an injection system for injecting a desulfurizer into the coal gas generating device (5) after the desulfurizer is fluidized; the upper part of the coal gas generating device (5) is connected with a cyclone separator (6), the lower part of the cyclone separator (6) is provided with a material returning device (7) which is communicated with the lower part of the coal gas generating device (5) to form a circulating channel; the coal powder bin (2) is further arranged on the side face of the coal gas generating device (5), and the coal powder bin (2) is provided with a coal powder spiral feeder (3) communicated to the lower portion of the coal gas generating device (5) to form a feeding channel.

2. The fluidized bed gas generator for nonferrous smelting according to claim 1, wherein the hydrogen sulfide removing device comprises: the number of the interfaces between the injection system and the coal gas generating device (5) is 1-4.

3. The fluidized bed gas generator for nonferrous smelting according to claim 1, wherein the hydrogen sulfide removing device comprises: the injection system comprises a powder fluidizing device (1) and a powder output device (10); wherein, the side wall of the powder fluidizing device (1) is provided with a desulfurizer feeding port, the bottom of the powder fluidizing device (1) is provided with a gas inlet, and the top of the powder fluidizing device (1) is provided with a material outlet.

4. The fluidized bed gas generator for nonferrous smelting according to claim 3, wherein the hydrogen sulfide removing device comprises: the injection system also comprises an airflow dispersion device (9), and the material outlet is connected with the material inlet of the airflow dispersion device (9); a material outlet of the airflow dispersion device (9) is connected with a material inlet of the powder output device (10); the material output device (10) is connected with the coal gas generating device (5).

5. The fluidized bed gas generator for nonferrous smelting according to claim 1, wherein the hydrogen sulfide removing device comprises: the injection pressure of the injection system is slightly larger than the internal pressure of the coal gas generating device (5).

6. The fluidized bed gas generator for nonferrous smelting according to claim 3, wherein the hydrogen sulfide removing device comprises: a limestone feeding assembly (4) is arranged at the feed inlet of the desulfurizer; the gas inlet is provided with a pressure delivery assembly (8).

7. A method for removing hydrogen sulfide in a fluidized bed gas generator for nonferrous smelting using the device according to any one of claims 1 to 6, characterized by comprising the steps of: the desulfurizer is fluidized by using an injection system and then enters a coal gas generating device (5), so that the desulfurizer and coal powder react together in the coal gas generating device (5), and the chemical reaction formula is as follows: CaCO₃＝CaO+CO₂，CaO+H₂S＝CaS+H₂O，CaCO₃+H₂S＝CaS+H₂O+CO₂And the hydrogen sulfide is removed while the coal gas is generated, so that the environmental protection requirement is met.

Technical Field

The invention relates to a device and a method for removing hydrogen sulfide in a fluidized bed gas generating device for nonferrous smelting, belonging to the technical field of metallurgical gas.

Background

Most of sulfur in coal gas is expressed as H₂S is present in the form of H₂S is converted into SO with the combustion of coal gas₂. With economic development, at present, China further increases the intensity of energy conservation and pollution control work of coal-consuming enterprises, and achieves positive effects by implementing the work of energy conservation transformation, comprehensive pollution remediation, energy efficiency benchmarking promotion, reinforcement supervision and law enforcement, capacity construction enhancement and the like, but still has some problems.

The conventional coal gas semi-dry desulfurization and wet desulfurization have large occupied area, secondary pollution, high water resource consumption and operation cost and complex process flow. In the conventional method for removing hydrogen sulfide in a generating device in a laboratory, a desulfurizing agent and coal powder are directly mixed, mixed particles are put into a coal gas generating device for reaction, and the mixing process of the particles needs to be considered. The mixing device consumes high energy, and if the mixing is not uniform, the coal feeding amount per unit time is fluctuated, so that the gasification is unstable.

Disclosure of Invention

The invention aims to provide a device and a method for removing hydrogen sulfide in a fluidized bed gas generating device for nonferrous smelting, which are used for overcoming the defects in the prior art.

The invention is realized by the following steps: a hydrogen sulfide removal device in a fluidized bed gas generation device for nonferrous smelting comprises the fluidized bed gas generation device and an injection system which is used for fluidizing a desulfurizing agent and then injecting the fluidized desulfurizing agent into the gas generation device; the upper part of the gas generating device is connected with a cyclone separator, and the lower part of the cyclone separator is provided with a material returning device communicated with the lower part of the gas generating device to form a circulating channel; the coal powder bin is also arranged on the side surface of the coal gas generating device and is provided with a coal powder spiral feeder which is communicated with the lower part of the coal gas generating device to form a feeding channel.

Furthermore, the number of the interfaces between the injection system and the gas generator is 1-4.

Further, the injection system comprises a powder fluidizing device and a powder output device; the side wall of the powder fluidizing device is provided with a desulfurizer feeding port, the bottom of the powder fluidizing device is provided with a gas inlet, and the top of the powder fluidizing device is provided with a material outlet.

Furthermore, the injection system further comprises an airflow dispersion device, and the material outlet is connected with a material inlet of the airflow dispersion device; the material outlet of the airflow dispersion device is connected with the material inlet of the powder output device; the material output device is connected with the coal gas generating device.

Further, the injection pressure of the injection system is slightly greater than the internal pressure of the gas generating device.

Furthermore, the feed inlet of the desulfurizer is provided with a limestone feed assembly; the aforementioned gas inlet is provided with a pressure delivery assembly.

The method for removing hydrogen sulfide in the fluidized bed gas generating device for nonferrous smelting by adopting the device comprises the following steps: fluidizing the desulfurizer by using an injection system, and then feeding the fluidized desulfurizer into a coal gas generating device to ensure that the desulfurizer and coal powder jointly react in the coal gas generating device, wherein the chemical reaction formula is as follows: CaCO₃＝CaO+CO₂，CaO+H₂S＝CaS+H₂O，CaCO₃+H₂S＝CaS+H₂O+CO₂(experiments show that the desulfurization efficiency exceeds 80 percent under the conditions of 800 ℃ and 2 calcium-sulfur ratio), and the hydrogen sulfide is removed while the coal gas is generated, thereby meeting the requirement of environmental protection.

Compared with the prior art, the invention has the advantages of small floor area, no need of great reformation on raw gas generation, simple system, low cost and no secondary pollution, and SO is realized in the device₂Ultra-low emission. And the invention does not affect gasification stability. In addition, the invention does not need to cool the coal gas and then desulfurize after removing the hydrogen sulfide, and can directly supply hot coal gas to process equipment, thereby further saving the investment of cooling equipment and heat energy loss.

Drawings

FIG. 1 is a schematic diagram of the system structure of the device of the present invention.

The labels in the figures are: 1-powder fluidizing device, 2-pulverized coal bin, 3-pulverized coal screw feeder, 4-limestone feeding component, 5-gas generating device, 6-cyclone separator, 7-material returning device, 8-pressure conveying component, 9-airflow dispersing device and 10-powder output device.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The invention is implemented as follows: as shown in fig. 1, coal powder enters a coal gas generating device 5 through a coal powder screw feeder 3, a mixture of gasifying agent air and water vapor enters equipment from a gas blowing port of the coal gas generating device 5, meanwhile, desulfurizer limestone powder is fluidized in a powder fluidizing device 1 and then is sprayed into the coal gas generating device 5 through an airflow dispersing device 9 and a powder output device 10 to react with the coal powder together during gasification, and the chemical reaction formula is as follows: CaCO₃＝CaO+CO₂，CaO+H₂S＝CaS+H₂O，CaCO₃+H₂S＝CaS+H₂O+CO₂. At the upper part of the coal gas generating device 5, high-temperature coal gas carries unburned coal particles to fly to the cyclone separator 6, the unburned coal particles are separated out and sent back to the bottom of the coal gas generating device 5 by the material returning device 7, and then enter the device again for circulating combustion, gasification and hydrogen sulfide removal. The hot gas exiting the cyclone separator 6 can be supplied directly to the process equipment after passing through the air preheater. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.