Flue gas dedusting ash conveying system suitable for biomass fuel

Abstract

The utility model discloses a flue gas dedusting ash conveying system suitable for biomass fuel. The flue gas dedusting ash conveying system comprises at least one ash conveying unit. The ash conveying unit comprises an ash conveying pipeline, and one end of the ash conveying pipeline is connected with an ash hopper of the dust remover; a low-pressure continuous conveying pump is arranged on the ash conveying pipeline; and the low-pressure continuous conveying pump is connected with an ash conveying terminal control module. According to the flue gas dedusting ash conveying system suitable for the biomass fuel, the continuous conveying pump is matched with the terminal control module, the air supply amount and the boiling amount of the continuous conveying pump can be adjusted according to the real-time ash conveying amount, the designed ash conveying amount is effectively reduced, and the operation power consumption is reduced; fly ash fluidity can be enhanced, sedimentation is reduced, and the problem of traditional ash conveying blockage is solved; and the maintenance amount of the ash conveying system is reduced. An efficient, easy-to-use and reliable intelligent control means is adopted, the control precision and transparency of biomass fuel flue gas high-temperature dedusting ash conveying are improved, the ash conveying state is accurately mastered, and fine management is conducted on ash conveying.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to an ash conveying system suitable for dust removal of biomass fuel smoke. Background Art

[0002] In recent years, industrial boilers have become important thermal power equipment in China, with a wide range of applications and high demand. Biomass fuel boilers are gradually developing towards large-scale. With the development of large-scale, the dust removal structure inside the existing biomass fuel boilers cannot achieve rapid ash removal, so that the dust in the flue gas will enter the tail along with the flue gas, eventually causing the tail to be blocked and the boiler has to be stopped for ash cleaning, which affects the heat generation of the biomass boiler. Therefore, dust collectors are generally arranged at the tail flue of the boiler for dust collection.

[0003] The pneumatic ash removal system uses air as the conveying medium and power. The dust collected by the dust collector at the rear of the boiler is fluidized and flows along the pipeline through a compressed air or Roots blower pressurized ash conveying system. The characteristics of general biomass boiler fly ash are as follows: the content of alkaline substances in biomass ash is relatively high, and the content of inorganic elements in different biomass varies greatly; there are generally irregular particles of various shapes on the surface of biomass ash, specifically in the form of flakes, lumps, blocks, etc.; the biomass ash has a small bulk density and a high moisture content, and is easy to agglomerate and harden, and is also easy to stick to the wall; therefore, the conveying quality is affected by air pressure, ash composition, and ash characteristics. In actual operation, there are often phenomena such as insufficient conveying air pressure, pipeline blockage, and severe pipeline wear, which will seriously affect the normal operation of the biomass boiler's dust removal device and fail to achieve the treatment effect.

[0004] When a low-pressure continuous delivery pump is used as a power element in the prior art, the operating parameters of the low-pressure continuous delivery pump are usually set in advance, and the pump is continuously operated at a constant air supply and boiling volume during the actual operation. However, there are many problems when operating at a constant air supply and boiling volume. For example, due to the complex and changeable characteristics of biomass components, the ash delivery status is different at different times, resulting in a mismatch in the air-ash ratio, and finally causing poor ash delivery and blockage. Due to the high viscosity of biomass ash, water ash is easy to stick to the wall, resulting in blockage of the conveying equipment. The traditional conveying method conveying pipeline is prone to wear. The water content of biomass ash is high and it is easy to compact; the ash delivery air volume is large and consumes electricity. Utility Model Content

[0005] The utility model provides an ash conveying system suitable for biomass fuel smoke dust removal, which can effectively reduce the occurrence of blockage failures.

[0006] The utility model provides the following solutions:

[0007] An ash conveying system suitable for biomass fuel flue gas dust removal, comprising:

[0008] At least one ash conveying unit;

[0009] The ash conveying unit comprises an ash conveying pipeline, one end of which is connected to the ash hopper of the dust collector; a low-pressure continuous conveying pump is arranged on the ash conveying pipeline; the low-pressure continuous conveying pump is connected to an ash conveying terminal control module;

[0010] Among them, the ash conveying terminal control module is used to obtain the material level information in the ash hopper of the dust collector, and the material level information is used as a reference for generating adjustment instructions; the ash conveying terminal control module is also used to adjust the air supply volume and boiling volume of the low-pressure continuous conveying pump according to the received adjustment instructions to make the air supply volume and the boiling volume.

[0011] Preferably: it also includes a central control module, which is communicably connected with the ash conveying terminal control module; the central control module is used to receive the material level information and generate the adjustment instruction according to the material level information.

[0012] Preferably: it also includes a remote network control module, and the central control module is communicably connected to the remote network control module; the remote network control module is used to be communicably connected to the intelligent terminal device.

[0013] Preferably, the ash conveying units include multiple sets, and the ash conveying terminal control modules included in the multiple sets of ash conveying units are all communicably connected with the same central control module.

[0014] Preferably, the dust collector ash hopper is provided with at least one material level sensor, and the material level sensor is communicatively connected to the ash conveying terminal control module.

[0015] Preferably, the ash conveying pipeline includes a vertical section and a horizontal section, the dust collector ash hopper is connected to the top of the vertical section, and the low-pressure continuous conveying pump is arranged at the position of the horizontal section.

[0016] Preferably: the vertical section is provided with a metal compensator.

[0017] Preferably: a closing gate valve is provided on the vertical section at the upper part of the metal compensator.

[0018] According to the specific embodiments provided by the utility model, the utility model discloses the following technical effects:

[0019] Through the utility model, a ash conveying system suitable for biomass fuel flue gas dust removal can be realized. In one implementation mode, the system can include at least one ash conveying unit; the ash conveying unit includes an ash conveying pipeline, one end of which is connected to the dust collector ash hopper; a low-pressure continuous conveying pump is arranged on the ash conveying pipeline; the low-pressure continuous conveying pump is connected to an ash conveying terminal control module; wherein the ash conveying terminal control module is used to obtain the material level information in the dust collector ash hopper, and the material level information is used as a reference for generating adjustment instructions; the ash conveying terminal control module is also used to adjust the air supply volume and boiling volume of the low-pressure continuous conveying pump according to the received adjustment instructions, so that the air supply volume and the boiling volume. The ash conveying system suitable for biomass fuel flue gas dust removal provided by the present application, the continuous conveying pump cooperates with the terminal control module to adjust the air supply volume and boiling volume of the continuous conveying pump according to the real-time ash supply volume, effectively reducing the designed ash supply volume and reducing the operating power consumption; it can enhance the fluidity of fly ash and reduce sedimentation, avoiding the problem of blockage of traditional ash conveying; and reduce the maintenance of the ash conveying system. Adopt efficient, easy-to-use and reliable intelligent control means to improve the control accuracy and transparency of biomass fuel flue gas high-temperature dust ash transportation, accurately grasp the ash transportation status, and carry out refined management of ash transportation.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of a structure of a biomass fuel flue gas dust removal ash conveying system provided by an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of the arrangement of multiple sets of ash conveying units provided in an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the connection between the central control module and each module provided in an embodiment of the utility model.

[0025] In the figure: 1. Dust collector hopper; 2. Closing gate valve; 3. Metal compensator; 4. Low-pressure continuous conveying pump; 5. Ash conveying terminal control module; 6. Central control module; 7. Remote network control module. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0027] Example

[0028] See also Figure 1 , Figure 2 , Figure 3 , is a dust removal ash conveying system for biomass fuel flue gas provided by the embodiment of the utility model, such as Figure 1 , Figure 2 , Figure 3 As shown, the system may include:

[0029] At least one ash conveying unit;

[0030] The ash conveying unit comprises an ash conveying pipeline, one end of which is connected to the dust collector ash hopper 1; a low-pressure continuous conveying pump 4 is arranged on the ash conveying pipeline; the low-pressure continuous conveying pump 4 is connected to an ash conveying terminal control module 5;

[0031] Among them, the ash conveying terminal control module 5 is used to obtain the material level information in the dust collector ash hopper 1, and the material level information is used as a reference for generating adjustment instructions; the ash conveying terminal control module 5 is also used to adjust the air supply volume and boiling volume of the low-pressure continuous conveying pump 4 according to the received adjustment instructions to make the air supply volume and the boiling volume.

[0032] The ash conveying system for biomass fuel flue gas dust removal provided by the embodiment of the present application can adjust the air supply and boiling volume of the low-pressure continuous conveying pump 4 through the ash conveying terminal control module 5 during the operation of the system. The adjustment method can be determined according to the amount of material in the dust collector ash hopper 1. For example, when there is a lot of material in the dust collector ash hopper 1, the air supply and boiling volume of the low-pressure continuous conveying pump 4 can be increased so that the material can be discharged as soon as possible to prevent accumulation. When there is less material in the dust collector ash hopper 1, the air supply and boiling volume of the low-pressure continuous conveying pump 4 can be reduced to ensure that the material can be transported out without accumulation, and at the same time, the energy consumption can be reduced to achieve the purpose of energy saving.

[0033] By precisely controlling the air supply and boiling volume of the continuous conveying pump, the fluidity of fly ash is guaranteed, sedimentation is reduced, the wall adhesion effect of fly ash is effectively reduced, the ash-gas ratio is reduced, the risk of fly ash collapse is reduced, and pipeline blockage caused by collision when traditional ash conveying pipelines are aggregated is avoided.

[0034] It is understandable that the adjustment instructions provided in the embodiment of the present application can be obtained in a variety of ways, and the user can manually send the adjustment instructions to the ash conveying terminal control module 5 after making a judgment based on the material level information of the material in the ash hopper. In order to further improve the automation of the system, the embodiment of the present application can also provide a central control module 6, which is communicatively connected to the ash conveying terminal control module 5; the central control module 6 is used to receive the material level information and generate the adjustment instructions based on the material level information. The central control module 6 can be configured with a corresponding instruction production model, automatically generate an adjustment instruction based on the received material level information, and then return the adjustment instruction to the ash conveying terminal control module 5, so that the ash conveying terminal control module 5 can adjust the air supply and boiling volume of the low-pressure continuous conveying pump 4 according to the adjustment instruction.

[0035] In order to facilitate the management personnel to view the working status and material level of the current low-pressure continuous delivery pump 4 in real time, and to judge whether the generated adjustment instructions are accurate, the embodiment of the present application can also provide a remote network control module 7, and the central control module 6 is communicably connected to the remote network control module 7; the remote network control module 7 is used to be communicably connected to the intelligent terminal device. The central control module 6 can send the required information to the intelligent terminal for the user to view through the remote network control module 7. At the same time, it can also provide the remote network control module 7 with information such as relevant instructions sent by the user through the intelligent terminal device. The intelligent terminal device may include a smart phone and a PC.

[0036] Since one set of ash conveying system can include multiple sets of ash conveying units, in order to realize centralized control and reduce the number of hardware devices, the embodiment of the present application can also provide that the ash conveying units include multiple sets, and the ash conveying terminal control modules 5 included in the multiple sets of ash conveying units are all communicatively connected to the same central control module 6. The ash conveying terminal control modules 5 included in the multiple sets of ash conveying units can be controlled simultaneously by one set of central control module 6.

[0037] Furthermore, the ash conveying pipeline includes a vertical section and a horizontal section, the dust collector ash hopper 1 is connected to the top of the vertical section, and the low-pressure continuous conveying pump 4 is arranged at the position of the horizontal section. The vertical section is provided with a metal compensator 3. A closing gate valve 2 is arranged on the upper part of the metal compensator 3 on the vertical section.

[0038] In summary, the ash conveying system for biomass fuel flue gas dust removal provided by this application can adjust the air supply and boiling volume of the continuous conveying pump according to the real-time ash conveying volume with the terminal control module, effectively reducing the designed ash conveying volume and reducing the operating power consumption; it can enhance the fluidity of fly ash and reduce sedimentation, avoiding the blockage problem of traditional ash conveying; and reduce the maintenance of the ash conveying system. It adopts efficient, easy-to-use and reliable intelligent control means to improve the control accuracy and transparency of biomass fuel flue gas high-temperature dust removal ash conveying, accurately grasp the ash conveying status, and conduct refined management of ash conveying.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A dust removal ash conveying system suitable for biomass fuel flue gas, characterized in that: Includes at least one ash conveying unit; The ash conveying unit comprises an ash conveying pipeline, one end of which is connected to the ash hopper of the dust collector; a low-pressure continuous conveying pump is arranged on the ash conveying pipeline; the low-pressure continuous conveying pump is connected to an ash conveying terminal control module; Among them, the ash conveying terminal control module is used to obtain the material level information in the ash hopper of the dust collector, and the material level information is used as a reference for generating adjustment instructions; the ash conveying terminal control module is also used to adjust the air supply volume and boiling volume of the low-pressure continuous conveying pump according to the received adjustment instructions to make the air supply volume and the boiling volume.

2. The ash conveying system for biomass fuel flue gas dust removal according to claim 1 is characterized in that: It also includes a central control module, which is communicably connected with the ash conveying terminal control module; the central control module is used to receive the material level information and generate the adjustment instruction according to the material level information.

3. The ash conveying system for biomass fuel flue gas dust removal according to claim 2 is characterized in that: It also includes a remote network control module, and the central control module is communicably connected to the remote network control module; the remote network control module is used to be communicably connected to the intelligent terminal device.

4. The ash conveying system for biomass fuel flue gas dust removal according to claim 3 is characterized in that: The ash conveying units include multiple sets, and the ash conveying terminal control modules included in the multiple sets of ash conveying units are all communicably connected with the same central control module.

5. The ash conveying system for biomass fuel flue gas dust removal according to claim 1 is characterized in that: The dust collector ash hopper is provided with at least one material level sensor, and the material level sensor is communicatively connected with the ash conveying terminal control module.

6. The ash conveying system for biomass fuel flue gas dust removal according to claim 1 is characterized in that: The ash conveying pipeline includes a vertical section and a horizontal section. The dust collector ash hopper is connected to the top of the vertical section, and the low-pressure continuous conveying pump is arranged at the position of the horizontal section.

7. The ash conveying system for biomass fuel flue gas dust removal according to claim 6 is characterized in that: The vertical section is provided with a metal compensator.

8. The ash conveying system for biomass fuel flue gas dust removal according to claim 7 is characterized in that: A closing gate valve is arranged on the vertical section at the upper part of the metal compensator.

Images