Heat treatment device for desulfurization post-treatment

Abstract

The utility model relates to the technical field of desulfurization post-treatment equipment, in particular to a heat treatment device for desulfurization post-treatment, which comprises an incinerator, an incinerator main burner, a fuel gas pipeline, a combustion-supporting gas pipeline and a waste heat treatment component, the device is used for carrying out high-temperature heat treatment on tail gas after a desulfurization oxidation section and carrying out combustion oxidation on residual hydrogen sulfide or sulfur-containing harmful substances in the tail gas after a desulfurization oxidation reaction, so that sulfur-containing compounds in the tail gas are eliminated to the maximum extent, the purification effect of acid gas is improved, and the post-treatment effect is better; and meanwhile, heat in the post-treated tail gas can be recycled in time, energy waste is reduced, and the energy utilization rate is increased. Fuel gas and combustion-supporting gas are mixed through the incinerator and then combusted to generate hot flue gas, the hot flue gas enters the incinerator to be incinerated together with tail gas, and residual hydrogen sulfide and sulfide in the tail gas are subjected to oxidation aftertreatment; and in addition, waste heat contained in the tail gas is recycled in time.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization post-processing equipment, in particular to a heat treatment device for desulfurization post-processing. Background Art

[0002] In the current petrochemical, coal chemical, natural gas, sulfuric acid plant and other chemical industries, acidic gases such as hydrogen sulfide are produced during production. These acidic gases are generally treated by desulfurization process to convert H 2 S is converted into elemental sulfur as much as possible, and the desulfurization equipment is a device used to treat these acid gases containing harmful sulfur substances. The currently commonly used desulfurization process is to use an oxidation method to convert harmful sulfur-containing substances in acid gases into elemental sulfur. However, in the commonly used desulfurization equipment, hydrogen sulfide or harmful sulfur-containing substances are still present in the tail gas after the oxidation reaction, and the purification effect is not ideal; at the same time, the tail gas generated after treatment contains a large amount of heat, and direct discharge will cause energy waste, which does not meet environmental protection requirements. Therefore, based on the above problems, the existing technology needs to be further improved. Utility Model Content

[0003] The purpose of the utility model is to provide a heat treatment device for post-desulfurization treatment to solve the existing technical problems existing in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a heat treatment device for post-desulfurization treatment is provided, including an incinerator, a main burner of the incinerator, a fuel gas pipeline, a combustion-supporting gas pipeline and a waste heat treatment component;

[0005] The main burner of the incinerator is connected to the incinerator and is arranged at the head end of the incinerator. The fuel gas pipeline is connected to the main burner of the incinerator. The combustion-supporting gas pipeline is connected to the main burner of the incinerator through a first pipeline, and is connected to the incinerator through a second pipeline and a third pipeline. The incinerator is also connected to an exhaust gas pipeline; the waste heat treatment component is arranged at the end of the incinerator for recovering the waste heat of the exhaust gas.

[0006] Based on the above technical solution, the waste heat treatment component includes a waste heat boiler and an exhaust gas heat exchange pipeline. The exhaust gas heat exchange pipeline is arranged inside the waste heat boiler and has an exhaust gas inlet and an exhaust gas outlet at both ends. The exhaust gas inlet is connected to the end of the incinerator. The bottom end of the waste heat boiler is connected to the medium-pressure boiler water pipeline, and the top end is connected to the steam pipeline.

[0007] Based on the above technical solution, the exhaust gas outlet is connected to the exhaust gas heat exchanger through a pipeline.

[0008] Based on the above technical solution, the combustion-supporting gas is set to air, and the fuel gas is set to natural gas.

[0009] Based on the above technical solution, a blower is provided at the head end of the combustion-supporting gas pipeline to provide combustion-supporting gas.

[0010] On the basis of the above technical solution, the waste heat boiler is further provided with a sewage outlet, and the sewage outlet is connected to a sewage tank through a pipeline.

[0011] The beneficial effects of the technical solution provided by the utility model are:

[0012] 1. The utility model provides a heat treatment device for high-temperature heat treatment of tail gas after the desulfurization oxidation process, burning and oxidizing the residual hydrogen sulfide or sulfur-containing harmful substances in the tail gas after the desulfurization oxidation reaction, achieving the maximum elimination of sulfur-containing compounds in the tail gas, improving the purification effect of acidic gas, and achieving better post-treatment effect; at the same time, the heat in the tail gas after post-treatment can be promptly recycled and utilized, reducing energy waste and improving energy utilization. By setting up an incinerator, the fuel gas and the combustion-supporting gas introduced into the incinerator are mixed and burned to produce hot flue gas, which enters the incinerator and is incinerated at 750-800°C together with the tail gas in the incinerator. At the same time, an excess of combustion-supporting gas, i.e., air, is introduced into the incinerator to further oxidize the residual hydrogen sulfide and sulfide in the tail gas. By setting up a waste heat treatment component, the waste heat contained in the tail gas flowing out of the incinerator can be promptly recycled to improve the recycling of energy.

[0013] 2. By setting a waste heat boiler at the end of the incinerator, the heat in the treated exhaust gas can be recycled and utilized, so as to make full use of energy, improve energy utilization rate, and be more energy-saving and environmentally friendly. Specifically, the exhaust gas after heat treatment in the incinerator enters the exhaust gas heat exchange pipeline in the waste heat boiler through the exhaust gas inlet, and medium-pressure boiler water is introduced into the waste heat boiler through the medium-pressure boiler water pipeline. That is, when the exhaust gas passes through, the medium-pressure boiler water absorbs the heat in the exhaust gas to form steam, and the steam flows out from the steam pipeline connected to the top of the waste heat boiler, which is convenient for subsequent recycling and reuse. After the exhaust gas flows out of the exhaust gas heat exchange pipeline, it goes to the next section. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the waste heat treatment component in the utility model; DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1 to Figure 2 As shown, a heat treatment device for post-desulfurization treatment includes an incinerator 1, a main burner 2 of the incinerator, a fuel gas pipeline 3, a combustion gas pipeline 4 and a waste heat treatment component.

[0020] The main burner 2 of the incinerator is connected to the incinerator 1 and is arranged at the head end of the incinerator 1. The fuel gas pipeline 3 is connected to the main burner 2 of the incinerator. The combustion-supporting gas pipeline 4 is connected to the main burner 2 of the incinerator through the first pipeline 41, and is connected to the incinerator 1 through the second pipeline 42 and the third pipeline 43. The incinerator 1 is also connected to the exhaust gas pipeline 5; the waste heat treatment component is arranged at the end of the incinerator 1 for recovering the waste heat of the exhaust gas.

[0021] The utility model provides a heat treatment device for high-temperature heat treatment of tail gas after the desulfurization oxidation process, burning and oxidizing the residual hydrogen sulfide or sulfur-containing harmful substances in the tail gas after the desulfurization oxidation reaction, achieving the maximum elimination of sulfur-containing compounds in the tail gas, improving the purification effect of acidic gas, and achieving better post-treatment effect; at the same time, the heat in the tail gas after post-treatment can be timely recycled and utilized, reducing energy waste and improving energy utilization. By providing an incinerator 1, the fuel gas and the combustion-supporting gas introduced into the incinerator are mixed and then burned to generate hot flue gas, and the hot flue gas enters the incinerator and is incinerated together with the tail gas at 750-800°C in the incinerator. At the same time, an excess of combustion-supporting gas, i.e., air, is introduced into the incinerator to further oxidize the residual hydrogen sulfide and sulfide in the tail gas. By providing a waste heat treatment component, the waste heat contained in the tail gas flowing out of the incinerator can be timely recycled, improving the recycling of energy.

[0022] Preferably, the head end of the tail gas pipeline 5 is connected to the end of the previous stage acid gas treatment device, such as a selective oxidation reactor or a sulfur trap or an evacuator of a liquid sulfur pool, etc., which is selected according to different actual treatment conditions to improve the applicability of the heat treatment device.

[0023] Based on the above technical solution, the waste heat treatment component includes a waste heat boiler 6 and an exhaust gas heat exchange pipeline. The exhaust gas heat exchange pipeline is arranged inside the waste heat boiler 6 and has an exhaust gas inlet 61 and an exhaust gas outlet 62 at both ends. The exhaust gas inlet 61 is connected to the end of the incinerator 1. The bottom end of the waste heat boiler 6 is connected to the medium-pressure boiler water pipeline 63, and the top end is connected to the steam pipeline 64.

[0024] By arranging a waste heat boiler 6 at the end of the incinerator 1, the heat in the treated exhaust gas can be recycled and utilized, so as to make full use of energy, improve energy utilization rate, and be more energy-saving and environmentally friendly. Specifically, the exhaust gas after heat treatment in the incinerator 1 enters the exhaust gas heat exchange pipeline in the waste heat boiler 6 through the exhaust gas inlet 61, and medium-pressure boiler water is introduced into the waste heat boiler 6 through the medium-pressure boiler water pipeline 63. That is, when the exhaust gas passes through, the medium-pressure boiler water absorbs the heat in the exhaust gas to form steam, and the steam flows out from the steam pipeline 64 connected to the top of the waste heat boiler 6, which is convenient for subsequent recycling and reuse. After the exhaust gas flows out of the exhaust gas heat exchange pipeline, it goes to the next work section.

[0025] Based on the above technical solution, the exhaust gas outlet 62 is connected to the exhaust gas heat exchanger 7 through a pipeline.

[0026] More preferably, in this embodiment, by providing an exhaust gas heat exchanger 7 at the exhaust gas outlet 62, the high-temperature exhaust gas can be cooled before entering the alkaline washing device, resulting in a better absorption effect.

[0027] Based on the above technical solution, the combustion-supporting gas is set to air, and the fuel gas is set to natural gas.

[0028] On the basis of the above technical solution, a blower 8 is provided at the head end of the combustion-supporting gas pipeline 4 to provide combustion-supporting gas.

[0029] Specifically, the temperature of the incinerator 1 is controlled by controlling the flow rate of fuel gas. The combustion-supporting gas of the incinerator 1 is provided by the blower 8 and is divided into three parts: the primary air, i.e., the combustion-supporting gas introduced into the second pipeline 42, is used for the sub-chemical equivalent combustion of the fuel gas; the secondary air, i.e., the combustion-supporting gas introduced into the first pipeline 41, is used for the over-chemical equivalent combustion of the fuel gas; the secondary air, i.e., the combustion-supporting gas introduced into the third pipeline 43, is used to adjust the furnace temperature of the incinerator.

[0030] On the basis of the above technical solution, a sewage outlet 65 is further provided on the waste heat boiler 6 , and the sewage outlet 65 is connected to a sewage tank 66 through a pipeline.

[0031] In this embodiment, a sewage outlet 65 is provided at the bottom of the waste heat boiler 6 and connected to a sewage tank 66, so that the waste water in the waste heat boiler 6 is discharged in time, which is convenient for subsequent sewage collection and treatment, and the operation process is more perfect and the post-treatment effect is good.

[0032] It should be noted that the head end and the end end mentioned above are defined according to the flow direction of the medium such as liquid, gas or steam in the pipeline, which is only for the convenience of understanding and description of the present technical solution and does not constitute a limitation to the present application.

[0033] The basic principle and main features of the utility model are shown and described above. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat treatment device for post-desulfurization treatment, characterized in that: The invention comprises an incinerator (1), a main burner of the incinerator (2), a fuel gas pipeline (3), a combustion gas pipeline (4) and a waste heat treatment component. The main burner (2) of the incinerator is connected to the incinerator (1) and is arranged at the head end of the incinerator (1); the fuel gas pipeline (3) is connected to the main burner (2) of the incinerator; the combustion-supporting gas pipeline (4) is connected to the main burner (2) of the incinerator through a first pipeline (41) and is connected to the incinerator (1) through a second pipeline (42) and a third pipeline (43); the incinerator (1) is also connected to an exhaust gas pipeline (5); and the waste heat treatment component is arranged at the end of the incinerator (1) and is used for recovering waste heat from the exhaust gas.

2. A heat treatment device for post-desulfurization treatment according to claim 1, characterized in that: The waste heat treatment component comprises a waste heat boiler (6) and an exhaust gas heat exchange pipeline, wherein the exhaust gas heat exchange pipeline is arranged inside the waste heat boiler (6) and is provided with an exhaust gas inlet (61) and an exhaust gas outlet (62) at both ends, wherein the exhaust gas inlet (61) is connected to the end of the incinerator (1), and the bottom end of the waste heat boiler (6) is connected to a medium-pressure boiler water pipeline (63), and the top end is connected to a steam pipeline (64).

3. A heat treatment device for post-desulfurization treatment according to claim 2, characterized in that: The tail gas outlet (62) is connected to the tail gas heat exchanger (7) via a pipeline.

4. A heat treatment device for post-desulfurization treatment according to claim 1, characterized in that: The combustion-supporting gas is set to be air, and the fuel gas is set to be natural gas.

5. A heat treatment device for post-desulfurization treatment according to claim 1, characterized in that: A blower (8) is provided at the head end of the combustion-supporting gas pipeline (4) to provide combustion-supporting gas.

6. A heat treatment device for post-desulfurization treatment according to claim 2, characterized in that: The waste heat boiler (6) is also provided with a sewage outlet (65), and the sewage outlet (65) is connected to a sewage tank (66) via a pipeline.

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