SDS (sodium dodecyl sulfate) calcium-based desulfurization device
By adding a second feeding pipeline in the SDS calcium-based desulfurization device, the desulfurization ash is reused to the desulfurization tower, the problems of low utilization rate and high operating cost of calcium-based desulfurization agent are solved, and the effect of increasing utilization rate and reducing operating cost is achieved.
Patent Information
- Application Number
- CN202421819681.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In the existing SDS calcium-based desulfurization process, the use rate of calcium-based desulfurization agent is low and the operating cost is high, mainly due to the failure to effectively reuse the desulfurization ash, which leads to the high calcium-sulfur ratio.
A SDS calcium-based desulfurization device is designed. By adding a second feeding pipeline, the desulfurization ash is reused into the desulfurization tower, and flue gas desulfurization is continued, the utilization rate of calcium-based desulfurization agent is increased, and the use amount of purchased calcium-based desulfurization agent is reduced.
It effectively improves the use rate of calcium-based desulfurization agents, reduces the calcium-sulfur ratio of SDS calcium-based desulfurization system, thereby reducing operating costs and reducing the amount of desulfurization ash disposed of from the transportation.
Smart Images
Figure CN222871810U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to an SDS calcium-based desulfurization device. Background Art
[0002] SDS dry desulfurization is an effective flue gas desulfurization technology with high desulfurization efficiency and wide applicability. It uses adsorbents to adsorb sulfur dioxide in flue gas, which can efficiently and flexibly reduce the sulfur dioxide concentration in flue gas while realizing resource recycling.
[0003] The calcium-based desulfurizers used in the SDS desulfurization process are divided into calcium-based (highly active calcium, such as calcium hydroxide) and sodium-based (such as baking soda). These two absorbents have their own advantages and disadvantages. The sodium-based is more suitable for working conditions with high pollutant concentrations and high flue gas temperatures (160°C-250°C), but the flue gas entering the desulfurization system sometimes cannot meet this temperature, and the main component of the desulfurization ash is sodium sulfate, which is a hazardous waste and difficult to handle. The calcium-based is more suitable for lower pollutant concentrations and lower flue gas temperatures. The desulfurization reaction temperature is only required to reach above 80°C, and the desulfurization ash contains about 30% unreacted calcium hydroxide, calcium sulfite, etc. It has high activity and can be used for pulping and reuse of wet or semi-dry desulfurization.
[0004] At present, the main way to dispose of desulfurization ash after calcium-based desulfurization is to pay a third party for external disposal. Some of the still active calcium-based desulfurizers in the desulfurization ash are not reused in the desulfurization system, making the calcium-sulfur ratio of the desulfurization system usually above 2.5, resulting in high operating costs. In addition, high-activity calcium is currently purchased from outside at a price of about 2,000 yuan / ton, which is relatively expensive. Utility Model Content
[0005] The utility model aims to provide a SDS calcium-based desulfurization device to solve the problems of low utilization rate of calcium-based desulfurizer and high operating cost in the existing SDS calcium-based desulfurization process.
[0006] In order to achieve the above-mentioned purpose, the utility model provides an SDS calcium-based desulfurization device, including a desulfurization tower, a first feeding pipeline and a second feeding pipeline, the desulfurization tower has a first feed port and a second feed port, the first feeding pipeline is connected to the first feed port to transport the calcium-based desulfurizer to the desulfurization tower, the second feeding pipeline is connected to the second feed port to transport the desulfurization ash to the desulfurization tower, the desulfurization ash is the product after desulfurization of flue gas using the calcium-based desulfurizer.
[0007] Optionally, the SDS calcium-based desulfurization device further includes an ash unloading and recycling pipeline, one end of which is connected to the desulfurization ash bin, and the other end of which is connected to the second feeding pipeline to transport the desulfurization ash to the second feeding pipeline.
[0008] Optionally, an ash unloading valve is provided on the ash unloading recycling pipeline, and the ash unloading valve is used to adjust the ash unloading amount of the desulfurization ash bin.
[0009] Optionally, a first blower is disposed on the first feeding pipeline, a second blower is disposed on the second feeding pipeline, and both the first blower and the second blower are Roots blowers.
[0010] Optionally, a first weighing feeder is provided on the first feeding pipeline, and the first weighing feeder is used to supply the calcium-based desulfurization agent.
[0011] Optionally, a first check valve is also provided on the first feeding pipeline.
[0012] Optionally, a first stop valve is also provided on the first feeding pipeline.
[0013] Optionally, a second check valve is also provided on the second feeding pipeline.
[0014] Optionally, a second stop valve is also provided on the second feeding pipeline.
[0015] Optionally, the SDS calcium-based desulfurization device also includes a spare feed pipeline, one end of the spare feed pipeline is connected to the second feed pipeline, and the other end is connected to the desulfurization tower. The spare feed pipeline is also provided with a third stop valve and a second weighing feeder. The third stop valve is used to control the connection between the spare feed pipeline and the second feed pipeline, and the second weighing feeder is used to supply the calcium-based desulfurizer.
[0016] The SDS calcium-based desulfurization device provided by the utility model has at least one of the following beneficial effects:
[0017] 1) By adding the second feeding pipeline to recycle the desulfurized ash to the desulfurization tower to continue flue gas desulfurization, the calcium-based desulfurizer still active in the desulfurized ash can be effectively utilized, thereby increasing the utilization rate of the calcium-based desulfurizer, reducing the calcium-sulfur ratio of the SDS calcium-based desulfurization system, and further reducing the usage of the purchased calcium-based desulfurizer, thereby reducing the operating cost of the calcium-based desulfurization;
[0018] 2) By adding the spare feeding pipeline, it can be activated when the first feeding pipeline fails, so as to transport fresh calcium-based desulfurizer to the desulfurization tower to ensure the normal progress of the desulfurization process. In addition, since the Roots blower is usually one spare and one used or two spare and one used, the spare feeding pipeline and the second feeding pipeline can share a spare Roots blower, thereby avoiding an increase in investment cost;
[0019] 3) Reduce the amount of desulfurized ash transported for disposal, thereby reducing disposal costs;
[0020] 4) The structural design of the entire device is ingenious and reasonable, which is suitable for both new SDS calcium-based desulfurization projects and the transformation and application of existing projects. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Those skilled in the art should understand that the drawings provided are for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.
[0022] Figure 1 This is a schematic structural diagram of an SDS calcium-based desulfurization device provided in one embodiment of the utility model.
[0023] in:
[0024] 100-desulfurization tower; 200-first feeding pipeline; 201-first weighing feeder; 202-first fan; 203-first check valve; 204-first stop valve; 300-second feeding pipeline; 301-second fan; 302-second check valve; 303-second stop valve; 400-ash unloading and recycling pipeline; 401-ash unloading valve; 500-spare feeding pipeline; 501-third stop valve; 502-second weighing feeder. DETAILED DESCRIPTION
[0025] In order to make the purpose, advantages and features of the present utility model clearer, the present utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the present utility model. In order to make the purpose, features and advantages of the present utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Any modification of the structure, change in the proportional relationship or adjustment of the size, in the case of the same or similar effects and purposes that can be achieved by the present utility model, should still fall within the scope of the technical content disclosed by the present utility model.
[0026] As used in the present invention, the singular forms "one", "an", and "the" include plural objects, unless the content clearly indicates otherwise. As used in the present invention, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise. As used in the present invention, the term "several" is generally used in a sense that includes "at least one", unless the content clearly indicates otherwise. As used in the present invention, the term "at least two" is generally used in a sense that includes "two or more", unless the content clearly indicates otherwise. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features.
[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection 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.
[0028] Please refer to Figure 1 The present embodiment provides an SDS calcium-based desulfurization device, including a desulfurization tower 100, a first feed pipeline 200 and a second feed pipeline 300. The desulfurization tower 100 has a first feed port and a second feed port. The first feed pipeline 200 is connected to the first feed port to transport the calcium-based desulfurizer to the desulfurization tower 100. The second feed pipeline 300 is connected to the second feed port to transport the desulfurization ash to the desulfurization tower 100. The desulfurization ash is the product after desulfurization of flue gas using the calcium-based desulfurizer.
[0029] By adding the second feeding pipeline 300 to recycle the desulfurization ash to the desulfurization tower 100 to continue flue gas desulfurization, the calcium-based desulfurizer that is still active in the desulfurization ash can be effectively utilized, thereby improving the utilization rate of the calcium-based desulfurizer, reducing the calcium-sulfur ratio of the SDS calcium-based desulfurization device, and further reducing the use of the purchased calcium-based desulfurizer, thereby reducing operating costs.
[0030] In this embodiment, the SDS calcium-based desulfurization device further includes an ash unloading and recycling pipeline 400, one end of which is connected to the desulfurization ash bin, and the other end is connected to the second feeding pipeline 300, so as to transport the desulfurization ash to the second feeding pipeline 300. Specifically, the desulfurization ash in the desulfurization ash bin comes from the bottom sedimentation of the desulfurization tower 100 and the ash hopper of the bag filter. In addition to designing a conventional ash unloading pipeline, the desulfurization ash bin can be newly equipped with an ash unloading and recycling pipeline 400, which is connected to the second feeding pipeline 300 through the ash unloading and recycling pipeline 400, and the desulfurization ash is sent into the desulfurization tower 100 by the second fan 301 on the second feeding pipeline 300, and then participates in the desulfurization reaction.
[0031] Preferably, an ash discharge valve 401 is provided on the ash discharge recycling pipeline 400, and the ash discharge valve 401 is used to adjust the ash discharge amount of the desulfurization ash bin. In this embodiment, the ash discharge valve 401 is preferably a star-shaped ash discharge valve.
[0032] Preferably, the first feeding pipeline 200 is provided with a first weighing feeder 201, and the first weighing feeder 201 is used to supply the calcium-based desulfurizer. In this embodiment, the first weighing feeder 201 is not only used to supply the calcium-based desulfurizer, but also can be used to adjust the supply amount of the calcium-based desulfurizer. In this embodiment, the calcium-based desulfurizer transported by the first feeding pipeline 200 is a fresh desulfurizer, and its proportion is roughly between 60% and 75%, which can be adjusted by the first weighing feeder 201, and the desulfurization ash transported by the second feeding pipeline 300 is the product after the reaction of the calcium-based desulfurizer, and its proportion is roughly between 25% and 45%, which can be adjusted by the ash discharge valve 401. Of course, the utility model does not limit the proportion of the calcium-based desulfurizer and the desulfurization ash, which can be determined by debugging according to the actual working conditions and desulfurization effect.
[0033] In this embodiment, the first feeding pipeline 200 is provided with a first blower 202, and the second feeding pipeline 300 is provided with a second blower 301, and both the first blower 202 and the second blower 301 are Roots blowers. The first blower 202 is used to blow the calcium-based desulfurizer supplied by the first weighing feeder 201 into the desulfurization tower 100, and the second blower 301 is used to blow the desulfurized ash supplied by the ash unloading and recycling pipeline 400 into the desulfurization tower 100.
[0034] Preferably, a first check valve 203 is further provided on the first feeding pipeline 200 , and the first check valve 203 is used to ensure the one-way conduction of the first feeding pipeline 200 to prevent the calcium-based desulfurizer from flowing back to the first fan 202 .
[0035] Preferably, the first feeding pipeline 200 is further provided with a first stop valve 204, which is used to open or close the first feeding pipeline 200. For example, when the first fan 202 or the first weighing feeder 201 fails and needs to be repaired, the first stop valve 204 can be closed. In this embodiment, the first stop valve 204 can be a manual valve, an electric valve, a pneumatic valve, etc., and the utility model does not limit this.
[0036] Preferably, a second check valve 302 is further provided on the second feeding pipeline 300. Similarly, the second check valve 302 is used to ensure the one-way conduction of the second feeding pipeline 300 to prevent the desulfurized ash from flowing back to the second fan 301.
[0037] Preferably, the second feed pipeline 300 is further provided with a second stop valve 303. Similarly, the second stop valve 303 is used to open or close the second feed pipeline 300. For example, when the second fan 301 fails and needs to be repaired, the second stop valve 303 can be closed. In this embodiment, the second stop valve 303 can be a manual valve, an electric valve, a pneumatic valve, etc., and the present invention does not limit this.
[0038] Preferably, the SDS calcium-based desulfurization device further includes a spare feeding pipeline 500, one end of which is connected to the second feeding pipeline 300, and the other end is connected to the desulfurization tower 100. The spare feeding pipeline 500 is also provided with a third stop valve 501 and a second weighing feeder 502. The third stop valve 501 is used to control the connection between the spare feeding pipeline 500 and the second feeding pipeline 300, and the second weighing feeder 502 is used to supply the calcium-based desulfurizer. In this embodiment, the spare feeding pipeline 500 is used to be enabled when the first feeding pipeline 200 fails (such as the first fan 202 or the first weighing feeder 201 fails), so as to transport fresh calcium-based desulfurizer to the desulfurization tower 100 to ensure the normal progress of the desulfurization process. Therefore, when the first feeding pipeline 200 can normally supply calcium-based desulfurizer, the second stop valve 303 and the second weigh feeder 502 are both in a closed state. The second stop valve 303 and the second weigh feeder 502 are only opened when a failure occurs in the first feeding pipeline 200, thereby allowing the calcium-based desulfurizer supplied by the second weigh feeder 502 to be blown into the desulfurization tower 100 through the second fan 301.
[0039] Take a set of 400,000 Nm 3 Taking the SDS calcium-based desulfurization device with a flue gas volume of / h as an example, the inlet sulfur dioxide concentration is 250mg / Nm 3 , outlet sulfur dioxide concentration 35mg / Nm 3, calculated based on an annual operating time of 8,000 hours and a calcium-based desulfurizer of 2,000 yuan / ton, after adopting the SDS calcium-based desulfurization device provided by the utility model, assuming that the calcium-sulfur ratio is reduced from 2.5 to 2, the annual operating cost can be saved by 796,000 yuan.
[0040] In summary, the embodiment of the utility model provides an SDS calcium-based desulfurization device. By adding the second feeding pipeline 300 to recycle the desulfurization ash to the desulfurization tower 100 to continue flue gas desulfurization, the calcium-based desulfurizer that is still active in the desulfurization ash can be effectively utilized, thereby improving the utilization rate of the calcium-based desulfurizer, reducing the calcium-sulfur ratio of the SDS calcium-based desulfurization device, and further reducing the use of the purchased calcium-based desulfurizer, thereby reducing operating costs.
[0041] In addition, it should be recognized that although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the above disclosed technical content can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.
Claims
1. A SDS calcium-based desulfurization device, characterized in that: It includes a desulfurization tower, a first feed pipeline and a second feed pipeline. The desulfurization tower has a first feed port and a second feed port. The first feed pipeline is connected to the first feed port to transport a calcium-based desulfurizer to the desulfurization tower. The second feed pipeline is connected to the second feed port to transport desulfurization ash to the desulfurization tower. The desulfurization ash is the product of desulfurizing flue gas using the calcium-based desulfurizer.
2. The SDS calcium-based desulfurization device according to claim 1, characterized in that: The SDS calcium-based desulfurization device also includes an ash unloading and recycling pipeline, one end of which is connected to the desulfurization ash bin, and the other end is connected to the second feeding pipeline to transport the desulfurization ash to the second feeding pipeline.
3. The SDS calcium-based desulfurization device according to claim 2, characterized in that: The ash discharge recycling pipeline is provided with an ash discharge valve, and the ash discharge valve is used to adjust the ash discharge amount of the desulfurization ash bin.
4. The SDS calcium-based desulfurization device according to claim 1, characterized in that: The first feeding pipeline is provided with a first blower, the second feeding pipeline is provided with a second blower, and both the first blower and the second blower are Roots blowers.
5. The SDS calcium-based desulfurization device according to claim 1 or 4, characterized in that: The first feeding pipeline is provided with a first weighing feeder, and the first weighing feeder is used for supplying the calcium-based desulfurizing agent.
6. The SDS calcium-based desulfurization device according to claim 1 or 4, characterized in that: The first feeding pipeline is also provided with a first check valve.
7. The SDS calcium-based desulfurization device according to claim 1 or 4, characterized in that: The first feeding pipeline is also provided with a first stop valve.
8. The SDS calcium-based desulfurization device according to claim 1 or 4, characterized in that: The second feeding pipeline is also provided with a second check valve.
9. The SDS calcium-based desulfurization device according to claim 1 or 4, characterized in that: The second feeding pipeline is also provided with a second stop valve.
10. The SDS calcium-based desulfurization device according to claim 1, characterized in that: The SDS calcium-based desulfurization device also includes a spare feeding pipeline, one end of which is connected to the second feeding pipeline, and the other end is connected to the desulfurization tower. The spare feeding pipeline is also provided with a third stop valve and a second weighing feeder. The third stop valve is used to control the connection between the spare feeding pipeline and the second feeding pipeline, and the second weighing feeder is used to supply the calcium-based desulfurizer.