A desulfurization regeneration sulfur foam treatment production system

Abstract

The utility model belongs to the desulfurization technical field, concretely relates to a kind of sulfur foam treatment production system of desulfurization regeneration, including desulfurization liquid regenerator, sulfur foam tank, the sulfur foam liquid outlet of desulfurization liquid regenerator is connected sulfur foam tank, the foam separation gas outlet of sulfur foam tank top is connected the foam separation gas inlet of the top weather space position of desulfurization liquid regenerator upper portion.The utility model is by the gas separated out in sulfur foam tank device by top to desulfurization liquid regenerator device top gas phase space, realizes gas not external discharge, sulfur foam tank device top and desulfurization liquid regenerator device top gas phase intercommunication and pressure balance, and further realize that desulfurization liquid regenerator top gas can be pressurized operation.

Description

Technical Field

[0001] This utility model belongs to the field of desulfurization technology, specifically relating to a desulfurization and regeneration sulfur foam treatment production system. Background Technology

[0002] Currently, coking plants typically use wet oxidation for coal gas desulfurization. In a regeneration tower (or tank), sulfur particles in the desulfurization liquid are separated through gas oxidation regeneration and gas stripping. After liquid flotation of the sulfur particles from the composite bubbles, the sulfur foam is taken from the top of the regeneration tower (or tank) and sent to a sulfur foam tank (tower) for further separation of sulfur particles and gas. The gas separated from the sulfur foam contains pollutants such as H2S, HCN, NH3, and VOCs. This gas cannot be directly discharged according to current ultra-low emission environmental protection requirements for coking plants. The operation of the sulfur foam extraction system requires the desulfurization liquid regeneration tower (tank)... The top of the desulfurization liquid regeneration tower (tank) and the sulfur foam tank (tower) are at the same pressure balance. Currently, the top of the desulfurization liquid regeneration tower (tank) and the sulfur foam tank (tower) are usually at atmospheric pressure. With the environmental protection requirements for ultra-low emissions in coking, the waste gas from desulfurization liquid regeneration must not be discharged. The optimal solution is to return it to the positive pressure (~30KPa) coal gas system to achieve zero waste gas emission. Therefore, the gas pressure at the top of the regeneration tower must be greater than the coal gas system pressure to ensure the return of the regeneration waste gas to the coal gas. This results in a pressure imbalance between the top of the desulfurization liquid regeneration tower (tank) and the sulfur foam tank (tower), which makes the sulfur foam extraction system unable to operate normally. Utility Model Content

[0003] The purpose of this invention is to address the problems caused by the pressure difference at the top of the desulfurization liquid regeneration tower (tank) and the sulfur foam tank (tower) due to the back-mixing of desulfurization regeneration waste gas in current coking plants, which prevents the sulfur foam extraction system from operating and also prevents the emission of gas separated from the sulfur foam. This invention provides a sulfur foam treatment production system for desulfurization regeneration, enabling the gas separated from the sulfur foam during desulfurization regeneration to be returned to the regeneration waste gas under pressurized or atmospheric pressure. This gas, along with the desulfurization liquid regeneration waste gas, is then returned to the positive pressure coal gas system, eliminating the emission of sulfur foam separation waste gas to meet the current ultra-low emission environmental protection requirements of coking plants. Simultaneously, it ensures pressure balance at the top of the desulfurization liquid regeneration tower and the sulfur foam tank, meeting the normal production requirements of the sulfur foam extraction system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A desulfurization regeneration sulfur foam treatment production system includes a desulfurization liquid regeneration tower and a sulfur foam tank. The sulfur foam liquid outlet of the desulfurization liquid regeneration tower is connected to the sulfur foam tank. The system is characterized in that the foam separation gas outlet at the top of the sulfur foam tank is connected to the foam separation gas inlet at the top meteorological space of the desulfurization liquid regeneration tower.

[0006] Furthermore, the desulfurization liquid regeneration tower is a jet regeneration tower, and the upper part of the regeneration section of the desulfurization liquid regeneration tower is provided with a sulfur foam liquid outlet. The space above the sulfur foam liquid outlet is a tower top meteorological space, and the top of the tower top meteorological space is also provided with an air outlet.

[0007] Furthermore, the sulfur foam tank is provided with a clear liquid outlet at the top, a sulfur foam liquid inlet in the middle, and a concentrated sulfur foam outlet at the bottom.

[0008] Compared with existing technologies, the beneficial effects of this utility model are:

[0009] This invention achieves gas non-discharge by sending the gas separated from the sulfur foam tank device to the top gas phase space of the desulfurization liquid regeneration tower device. The gas phases at the top of the sulfur foam tank device and the top of the desulfurization liquid regeneration tower device are connected and pressure is balanced, thereby enabling pressurized operation of the gas at the top of the desulfurization liquid regeneration tower. Attached Figure Description

[0010] Figure 1 This is a process flow diagram of this utility model.

[0011] In the diagram: 1-Sulfur foam tank, 2-Desulfurization liquid regeneration tower, 1-1 Foam separation gas outlet, 1-2 Clear liquid outlet, 1-3 Sulfur foam liquid inlet, 1-4 Concentrated sulfur foam outlet, 2-1 Foam separation gas inlet, 2-2 Sulfur foam liquid outlet, 2-3 Top meteorological space, 3-Sulfur foam liquid surface, 4-Desulfurization liquid surface, 5-Foam separation gas, 6-Sulfur foam liquid. Detailed Implementation

[0012] The implementation of this utility model will be further described below with reference to specific embodiments:

[0013] See Figure 1 A desulfurization and regeneration sulfur foam treatment production system includes a desulfurization liquid regeneration tower 2 and a sulfur foam tank 1. The sulfur foam liquid outlet 2-2 of the desulfurization liquid regeneration tower 2 is connected to the sulfur foam tank 1, and the foam separation gas outlet 1-1 at the top of the sulfur foam tank 1 is connected to the foam separation gas inlet 2-1 at the top meteorological space 2-3 of the upper part of the desulfurization liquid regeneration tower 2.

[0014] The lower part of the desulfurization liquid regeneration tower 2 is the desulfurization section, and the upper part is the regeneration section. The desulfurization section is equipped with a gas inlet and a gas outlet. A spray device connected to the desulfurization liquid pipeline is provided above the gas outlet. The bottom of the desulfurization section is equipped with a desulfurization liquid outlet. The upper part of the regeneration section is equipped with a sulfur foam liquid outlet 2-2. The space above the sulfur foam liquid outlet 2-2 is the tower top meteorological space 2-3. The top of the tower top meteorological space 2-3 is also equipped with a gas outlet. The bottom of the regeneration section is equipped with a desulfurization liquid outlet.

[0015] The sulfur foam tank 2 has a clear liquid outlet 1-2 at the top, a sulfur foam liquid inlet 1-3 in the middle, and a concentrated sulfur foam outlet 1-4 at the bottom.

[0016] The sulfur foam treatment process using the above production system is as follows: the sulfur foam liquid 6 from the desulfurization liquid regeneration tower 2 enters the sulfur foam tank 1. In the sulfur foam liquid 6, sulfur particles and bubbles are separated. The separated foam separation gas 5 is sent from the top of the sulfur foam tank 1 to the top gas phase space 2-3 of the desulfurization liquid regeneration tower 2. The concentrated sulfur foam separated in the sulfur foam tank 1 is sent out from the bottom. The separated clear liquid (if any) is sent out from the upper clear liquid outlet 1-2.

[0017] The foam separation gas 5 separated from the sulfur foam tank 1 is sent from the top to the top gas phase space 2-3 of the desulfurization liquid regeneration tower 2, so that the foam separation gas 5 is sent to the desulfurization regeneration waste gas and the gas is not discharged. At the same time, the top of the sulfur foam tank 1 and the top of the desulfurization liquid regeneration tower 2 are connected to the gas phase, so that the pressure is balanced and the pressurization operation of the top gas phase space 2-3 of the desulfurization liquid regeneration tower 2 can be realized.

[0018] Whether clear liquid is discharged from sulfur foam tank 1 depends on the specific situation of the concentration of sulfur foam liquid 6 discharged from desulfurization liquid regeneration tower 2.

[0019] The desulfurization liquid regeneration tower 2 is existing technology.

[0020] The desulfurization liquid regeneration tower 2 can be either a high-tower regeneration or a jet regeneration.

[0021] In order to effectively control the concentration of the discharged concentrated sulfur foam, sulfur foam tank 1 is equipped with clear liquid outlet 1-2.

[0022] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.

Claims

1. A desulfurization regeneration sulfur foam treatment production system, comprising a desulfurization liquid regeneration tower and a sulfur foam tank, wherein the sulfur foam liquid outlet of the desulfurization liquid regeneration tower is connected to the sulfur foam tank, characterized in that, The foam separation gas outlet at the top of the sulfur foam tank is connected to the foam separation gas inlet at the meteorological space position at the top of the desulfurization liquid regeneration tower.

2. The sulfur foam treatment production system for desulfurization regeneration according to claim 1, characterized in that, The desulfurization liquid regeneration tower is a jet regeneration tower. The upper part of the regeneration section of the desulfurization liquid regeneration tower is provided with a sulfur foam liquid outlet. The space above the sulfur foam liquid outlet is the tower top meteorological space. The top of the tower top meteorological space is also provided with an air outlet.

3. The sulfur foam treatment production system for desulfurization regeneration according to claim 1, characterized in that, The sulfur foam tank is provided with a clear liquid outlet at the top, a sulfur foam liquid inlet in the middle, and a concentrated sulfur foam outlet at the bottom.

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