High-temperature dust removal and desulfurization integrated equipment

Abstract

The utility model discloses a high temperature dust removal desulfurization integration equipment relates to high temperature flue gas processing equipment field, including filter, one side of filter is equipped with high temperature flue gas inlet, be provided with high temperature metal film in filter, high temperature metal film forms intermetallic compound, solid solution special metal film through the high temperature sintering mode of heterogeneous metal powder, be equipped with desulfurizer injection port on filter, and the desulfurizer injection port is located between high temperature metal film and high temperature flue gas inlet, and high temperature, high precision dust removal creates the working condition of microdust for denitration, and flue gas and micropore denitration catalyst contact fully, makes micropore denitration catalyst effect fully play, and denitration efficiency improves greatly and is stable, and catalyst consumption reduces life and promotes 2 3 times, secondly, desulfurization, dust removal and denitration are completed in the same equipment in cooperation. Compared with traditional split type equipment, the equipment land area is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature flue gas treatment equipment, specifically a high-temperature dust removal and desulfurization integrated equipment. Background Technology

[0002] Industrial production, particularly in the industrial silicon sector, generates large quantities of high-temperature flue gas containing high concentrations of pollutants such as dust, sulfur oxides (SOx), and nitrogen oxides (NOx). If these pollutants are emitted directly without effective treatment, they will severely pollute the atmosphere, disrupt the ecological balance, and endanger human health, contradicting increasingly stringent environmental regulations and the concept of sustainable development.

[0003] Currently, the industry mostly adopts the traditional process mode of independently setting up dust removal, desulfurization, and denitrification equipment for the purification and treatment of such high-temperature flue gas. This mode has many significant drawbacks. The separate layout of dust removal, desulfurization, and denitrification equipment results in a large footprint, significantly increasing the investment cost and operation and maintenance expenses. At the same time, due to the lack of efficient coordination among the various process links, incomplete pollutant treatment and unstable emission indicators are prone to occur, making it difficult to meet increasingly stringent environmental emission requirements.

[0004] During the denitrification process, traditional equipment often fails to thoroughly remove dust, resulting in a large amount of dust remaining in the flue gas adhering to the surface of the denitrification catalyst. This not only affects the full contact between the flue gas and the catalyst, reducing denitrification efficiency, but also shortens the catalyst's lifespan, increasing the frequency and cost of catalyst replacement. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an integrated high-temperature dust removal and desulfurization equipment to solve the shortcomings of the existing technology.

[0006] The purpose of this utility model is achieved through the following technical solution: a high-temperature dust removal and desulfurization integrated device, including a filter, a high-temperature flue gas inlet on one side of the filter, a high-temperature metal membrane inside the filter, the high-temperature metal membrane being formed by high-temperature sintering of dissimilar metal powders to form an intermetallic compound, solid solution special metal membrane, and a desulfurizing agent injection inlet on the filter, the desulfurizing agent injection inlet being located between the high-temperature metal membrane and the high-temperature flue gas inlet.

[0007] Furthermore, a denitrification shell is connected to the top of the filter, one end of the denitrification shell is connected to the inner cavity of the filter, and the other end is provided with a low-temperature flue gas outlet. A microporous denitrification catalyst is provided inside the denitrification shell.

[0008] Furthermore, a waste heat boiler is provided between the microporous denitrification catalyst and the low-temperature flue gas outlet, and the branch pipe of the waste heat boiler extends into the denitrification shell.

[0009] Furthermore, a heat exchanger is connected to the bottom of the filter, and a slag discharge port is provided at the bottom of the heat exchanger. The slag discharge port is connected to the inner cavity of the filter, and a water inlet and a hot water outlet are provided on the side wall of the heat exchanger.

[0010] The beneficial effects of this utility model are:

[0011] 1. High-temperature and high-precision dust removal creates micro-dust working conditions for denitrification. The flue gas comes into full contact with the microporous denitrification catalyst, allowing the microporous denitrification catalyst to play its full role, greatly improving and stabilizing the denitrification efficiency, reducing the amount of catalyst used and increasing its lifespan by 2-3 times.

[0012] 2. Desulfurization, dust removal, and denitrification are completed collaboratively within the same equipment. Compared to traditional separate equipment, this significantly reduces the equipment footprint, lowers equipment investment and operation and maintenance costs, and avoids incomplete treatment caused by insufficient coordination between different process stages, ensuring stable compliance with environmental emission standards.

[0013] 3. The heat exchanger connected to the bottom of the filter and the waste heat boiler branch pipe in the denitrification shell form a two-stage waste heat recovery system, which can fully recover the waste heat in the high-temperature flue gas and produce medium-temperature and medium-pressure steam for power generation. Compared with the traditional process, the annual power generation increases by about 20%, which significantly improves the economy and energy-saving benefits of the production process.

[0014] 4. The high-temperature metal film has low resistance characteristics, which, combined with the advantage of the catalyst heat exchange system being less prone to clogging, reduces the overall system resistance of the equipment by more than 1 / 3, reduces operating energy consumption, and improves the stability and continuity of system operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an integrated high-temperature dust removal and desulfurization equipment according to the present invention;

[0016] Figure 2 This is a schematic diagram of the flue gas flow in a high-temperature dust removal and desulfurization integrated equipment according to this utility model;

[0017] In the diagram, 1-filter, 2-high temperature flue gas inlet, 3-high temperature metal membrane, 4-denitrification shell, 5-low temperature flue gas outlet, 6-microporous denitrification catalyst, 7-waste heat boiler, 8-heat exchanger, 9-slag discharge port, 10-water inlet, 11-hot water outlet. Detailed Implementation

[0018] Example 1

[0019] like Figure 1 and Figure 2As shown, a high-temperature dust removal and desulfurization integrated device includes a filter 1, with a high-temperature flue gas inlet 2 on one side. A high-temperature metal membrane 3 is installed inside the filter 1. The high-temperature metal membrane 3 is formed by high-temperature sintering of dissimilar metal powders to create an intermetallic compound or solid solution special metal membrane. Based on atomic-scale partial diffusion reaction synthesis technology, the high-temperature metal membrane 3 can achieve precise control of its pore structure at the micron / submicron level, resulting in excellent filtration performance such as uniform pore size distribution, high filtration accuracy, high open porosity, low tortuosity factor, and low filtration resistance. This meets the requirements for high-temperature, high-precision, and low-resistance dust removal before SCR. A desulfurizing agent injection inlet is provided on the filter 1, located between the high-temperature metal membrane 3 and the high-temperature flue gas inlet 2. Between the high-temperature flue gas inlet 2 and the filter 1, a denitrification shell 4 is connected to the top of the filter 1. One end of the denitrification shell 4 is connected to the inner cavity of the filter 1, and the other end is provided with a low-temperature flue gas outlet 5. A microporous denitrification catalyst 6 is installed inside the denitrification shell 4. High-temperature flue gas enters the filter 1 through the high-temperature flue gas inlet 2. Desulfurizing agent is mixed into the high-temperature flue gas through the desulfurizing agent injection inlet. After the high-temperature flue gas passes through the high-temperature metal membrane 3, particulate matter and desulfurizing agent are intercepted by the high-temperature metal membrane 3 to form a filter cake. Deep desulfurization is completed when the flue gas passes through the filter cake layer. The microporous denitrification catalyst 6 is arranged after dust removal. Because the flue gas contains less dust, the amount of denitrification catalyst used is small, the service life is long, and the denitrification efficiency is high. In addition, desulfurization, dust removal and denitrification are completed in the same equipment. Compared with traditional separate equipment, the equipment footprint is greatly reduced, the equipment investment and operation and maintenance costs are reduced, and the problem of incomplete treatment caused by insufficient coordination of various process links is avoided, ensuring that environmental emission indicators are stably met.

[0020] Example 2

[0021] Based on Embodiment 1, a heat exchanger 8 is connected to the bottom of the filter 1. The bottom of the heat exchanger 8 is provided with a slag discharge port 9, which is connected to the inner cavity of the filter 1. The side wall of the heat exchanger 8 is provided with a water inlet 10 and a hot water outlet 11. The heat exchanger 8 is hollow. The filter cake can be discharged by opening the slag discharge port 9. An annular cavity is formed between the inner wall and the outer wall of the heat exchanger 8. The water inlet 10 and the hot water outlet 11 are both connected to the annular cavity, so that the waste heat of the filter cake can be recovered and utilized.

[0022] Example 3

[0023] Based on Example 2, a waste heat boiler 7 is provided between the microporous denitrification catalyst 6 and the low-temperature flue gas outlet 5. The branch pipe of the waste heat boiler 7 extends into the denitrification shell 4. The high-temperature flue gas that has undergone desulfurization, dust removal and denitrification treatment passes through the waste heat boiler 7. The heat of the high-temperature flue gas is recovered and utilized by the waste heat boiler 7 to form low-temperature flue gas that meets the emission standards.

Claims

1. A high-temperature dust removal and desulfurization integrated equipment, characterized in that, The filter (1) includes a high-temperature flue gas inlet (2) on one side, and a high-temperature metal membrane (3) is provided inside the filter (1). The high-temperature metal membrane (3) is formed by high-temperature sintering of dissimilar metal powders to form an intermetallic compound and solid solution special metal membrane. The filter (1) is provided with a desulfurizing agent injection port, which is located between the high-temperature metal membrane (3) and the high-temperature flue gas inlet (2).

2. The high-temperature dust removal and desulfurization integrated equipment according to claim 1, characterized in that, The top of the filter (1) is connected to a denitrification shell (4). One end of the denitrification shell (4) is connected to the inner cavity of the filter (1), and the other end is provided with a low-temperature flue gas outlet (5). A microporous denitrification catalyst (6) is provided inside the denitrification shell (4).

3. The high-temperature dust removal and desulfurization integrated equipment according to claim 2, characterized in that, A waste heat boiler (7) is provided between the microporous denitrification catalyst (6) and the low-temperature flue gas outlet (5), and the branch pipe of the waste heat boiler (7) extends into the denitrification shell (4).

4. The integrated high-temperature dust removal and desulfurization equipment according to claim 1, characterized in that, The bottom of the filter (1) is connected to a heat exchanger (8), and the bottom of the heat exchanger (8) is provided with a slag discharge port (9). The slag discharge port (9) is connected to the inner cavity of the filter (1). The side wall of the heat exchanger (8) is provided with a water inlet (10) and a hot water outlet (11).

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