Negative pressure dust collection system and method

Abstract

The present invention discloses a negative pressure dust suction system and method, belonging to the field of negative pressure dust suction technology, wherein the negative pressure dust suction system includes a transition chamber, the cover of which is arranged outside the slag bin; a dust suction hood, which forms a closed space with the transition chamber, and the discharge port of the slag bin passes through the dust suction hood, the dust suction hood is provided with a through slot, and the through slot is connected to the transition chamber; a negative pressure dust suction module, one end of which is connected to the transition chamber, and the other end is connected to the negative pressure of the furnace; before the slag bin is discharged, the negative pressure dust suction module is first turned on and performs pre-dust suction for a predetermined time. Instead of dry slag machine, electric air lock feeder and other equipment, negative pressure dust suction is performed by using the negative pressure of the furnace to save resources; by setting an adjustable first delay time and second delay time, pre-dust suction and post-dust suction are performed to balance the dust collection effect and slag discharge efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of negative pressure dust collection, and in particular to a negative pressure dust collection system and method. Background Art

[0002] The dry slag discharge system of the power plant boiler is equipped with a slag bin. The boiler bottom slag is transported to the slag bin for storage through the dry slag discharge system, and the bottom slag in the slag bin is transported out of the factory by truck. The bottom slag contains a lot of dust, so when the slag is discharged from the slag bin, dust is serious, which not only pollutes the environment, is not good for the health of the workers, but also pollutes nearby equipment.

[0003] The existing dust suction equipment adopts a negative pressure dust suction device, whose air inlet end is used to be set at the discharge port at the bottom of the slag bin, the feed end of the slag bin is connected with the discharge end of the dry slag machine, and the air outlet end of the negative pressure dust suction device is used to be connected with the dry slag machine to suck the dust into the dry slag machine. That is, it is necessary to set up a dry slag machine, an electric air lock feeder and other equipment for negative pressure dust suction, which has high power consumption and wastes resources.

[0004] Therefore, it is necessary to abandon equipment such as dry slag machines and electric air lock feeders to save usage costs. The present invention directly uses the negative pressure of the furnace for negative pressure dust suction. However, if the negative pressure of the furnace is used for negative pressure dust suction, it is necessary to balance the dust collection effect and the slag discharge efficiency, that is, the overall unloading time needs to be shorter, but the dust collection effect must be very good. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0007] Therefore, the first object of the present invention is to provide a negative pressure dust suction system that can replace equipment such as dry slag machines and electric air lock feeders, utilize the negative pressure in the furnace to perform negative pressure dust suction, and save resources.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a negative pressure dust suction system, comprising a transition chamber, a cover of which is arranged outside the slag bin; a dust suction hood, which forms a closed space with the transition chamber, and the unloading port of the slag bin passes through the dust suction hood, and the dust suction hood is provided with a through groove, and the through groove is connected with the transition chamber; a negative pressure dust suction module, one end of which is connected with the transition chamber, and the other end is connected with the negative pressure of the furnace; before or after unloading the slag bin, the negative pressure dust suction module performs pre-dust suction or post-dust suction for a predetermined time.

[0009] As a preferred solution of the negative pressure dust collection system of the present invention, a mounting hole is provided at the bottom of the dust collection hood, and the discharge port of the slag bin passes through the mounting hole.

[0010] As a preferred solution of the negative pressure dust collection system of the present invention, there are multiple through grooves, and the multiple through grooves are evenly arranged in the circumferential direction of the mounting hole, and the distance from any same position of the multiple through grooves to the center of the mounting hole is equal.

[0011] As a preferred solution of the negative pressure dust collection system of the present invention, there are multiple through grooves, and the multiple through grooves are divided into at least two groups, and the number of the through grooves in any group is the same.

[0012] As a preferred solution of the negative pressure dust collection system of the present invention, the multiple through grooves belonging to the same group are evenly arranged in the circumferential direction around the mounting hole, and the distance from any same position of the multiple through grooves belonging to the same group to the center of the mounting hole is equal.

[0013] As a preferred solution of the negative pressure dust collection system of the present invention, the centers of the plurality of through grooves belonging to the same group are located on the same arc, and the distances between the arcs formed by the centers of the plurality of through grooves in two adjacent groups are equal.

[0014] As a preferred solution of the negative pressure dust collection system of the present invention, wherein: the extension line of the line between the center of any through slot in any group and the center of the mounting hole can pass through the center of the through slot of another group arranged at intervals.

[0015] As a preferred solution of the negative pressure dust suction system of the present invention, the negative pressure dust suction module includes a pipeline and a negative pressure dust suction valve arranged on the pipeline, the pipeline is connected to the negative pressure of the furnace, and the negative pressure dust suction valve controls the opening or closing of the pipeline.

[0016] The second object of the present invention is to provide a negative pressure dust collection method, which balances the dust collection effect and the slag discharge efficiency by setting an adjustable first delay time and a second delay time.

[0017] To solve the above technical problems, the present invention provides the following technical solutions: a negative pressure dust suction method, based on the negative pressure dust suction system, comprising: starting the negative pressure dust suction valve to perform pre-dust suction for a predetermined time of a first delay time T1; starting the unloading pneumatic valve to open the unloading port of the slag bin for unloading; closing the unloading pneumatic valve to perform post-dust suction for a predetermined time of a second delay time T2; opening the back-blowing valve to perform anti-blocking treatment for a predetermined time of a third delay time T3; and completing unloading.

[0018] As a preferred scheme of the negative pressure dust suction method of the present invention, if the negative pressure dust suction valve is not fully started, the first delay time T1 and the second delay time T2 are adjusted to extend the time of negative pressure dust suction; by controlling the specific time of the first delay time T1 and the second delay time T2, it is used to balance the dust collection effect and slag discharge efficiency.

[0019] The beneficial effects of the present invention are: replacing equipment such as dry slag machines and electric air lock feeders, utilizing the negative pressure in the furnace for negative pressure dust suction, and saving resources; by setting an adjustable first delay time T1 and a second delay time T2, pre-dust suction and post-dust suction are performed to balance the dust collection effect and slag discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 The figure is a structural diagram of the dust hood of the negative pressure dust collection system.

[0022] Figure 2 Schematic diagram of negative pressure vacuum system. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Example 1

[0028] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a negative pressure dust collection system, including a transition chamber 100, a dust collection hood 200 and a negative pressure dust collection module 300.

[0029] Specifically, the transition chamber 100 is a hollow structure, and the transition chamber 100 is disposed outside the slag bin A.

[0030] Preferably, the dust hood 200 is arranged at the bottom of the slag bin A. The dust hood 200 of this embodiment is shaped like a straight rectangular parallelepiped. The dust hood 200 and the transition chamber 100 form a closed space, and the discharge port A1 of the slag bin A passes through the dust hood 200 and extends to the bottom of the dust hood 200. The dust hood 200 is provided with a through groove 201, which is connected with the transition chamber 100 and the external environment; when in use, dust can enter the transition chamber 100 through the barrel groove 201.

[0031] Furthermore, one end of the negative pressure dust suction module 300 is connected to the transition chamber 100, and the other end is connected to the negative pressure of the furnace; the negative pressure of the furnace is used for negative pressure dust suction, thereby replacing the existing dry slag machine, electric air lock feeder and other equipment, saving resources.

[0032] When in use, before or after the slag bin A is unloaded, the negative pressure dust suction module 300 performs pre-dust suction or post-dust suction for a predetermined time to improve the dust suction efficiency, while appropriately speeding up the slag discharge speed, that is, balancing the dust collection effect and slag discharge efficiency.

[0033] Example 2

[0034] This is the second embodiment of the present invention, which is basically the same as the first embodiment.

[0035] Based on Example 1, Example 2 optimizes the dust hood 200 by adding an adjustable baffle, which is slidably installed on the dust hood 200. The opening degree of the barrel trough 201 is controlled by sliding the baffle, allowing the operator to adjust the baffle position according to the dust situation to optimize the dust collection effect.

[0036] Example 3

[0037] See also Figure 1 and Figure 2 , which is the third embodiment of the present invention, and this embodiment is based on embodiment 1.

[0038] Specifically, a mounting hole 202 is provided at the bottom of the dust hood 200, and the discharge port A1 of the slag bin A passes through the mounting hole 202. The mounting hole 202 of this embodiment is square in shape to match the shape of the discharge port A1 and improve the sealing performance of the system. In addition, two mounting holes 202 are provided in this embodiment.

[0039] Preferably, there are multiple through grooves 201, and the multiple through grooves 201 are evenly arranged in the circumferential direction around the mounting hole 202, and the distance from any same position of the multiple through grooves 201 to the center of the mounting hole 202 is equal, so as to ensure that the airflow between the dust hood 200 and the transition chamber 100 is evenly distributed, thereby improving the dust collection efficiency. The barrel groove 201 of this embodiment is in the shape of a round rectangle or a circle.

[0040] Preferably, there are multiple through grooves 201, and the multiple through grooves 201 are divided into at least two groups. In this embodiment, the multiple barrel grooves 201 are divided into five groups, and the number of through grooves 201 in any group is the same, so as to balance the suction force between the groups and optimize the dust collection effect.

[0041] Preferably, the multiple through grooves 201 belonging to the same group are evenly arranged in the circumferential direction of the mounting hole 202, and the distance from any same position of the multiple through grooves 201 belonging to the same group to the center of the mounting hole 202 is equal. The symmetrical design helps to maintain the balance and stability of the dust hood 200 and enhance the beneficial effects.

[0042] Furthermore, the centers of the multiple through grooves 201 belonging to the same group are located on the same arc, and the distances between the arcs formed by the centers of the multiple through grooves 201 of two adjacent groups are equal, that is, the multiple groups of through grooves 201 are concentrically arranged to maintain the symmetry and stability of the dust hood 200.

[0043] Furthermore, an extension line of a line connecting the center of any through slot 201 in any group and the center of the mounting hole 202 can pass through the center of another group of through slots 201 arranged at intervals, thereby optimizing the airflow path and improving the dust collection efficiency.

[0044] Furthermore, the negative pressure dust suction module 300 includes a pipe 301 and a negative pressure dust suction valve 302 arranged on the pipe 301. The pipe 301 is connected to the negative pressure of the furnace, and the negative pressure dust suction valve 302 controls the opening or closing of the pipe 301, which is convenient for operators to control and maintain, while improving the flexibility and adaptability of the system.

[0045] Example 4

[0046] See also Figure 1 and Figure 2, which is the fourth embodiment of the present invention, and this embodiment is based on embodiment 1 or embodiment 2.

[0047] S100: starting the negative pressure dust suction valve 302 to perform pre-dust suction for a predetermined time period of a first delay time T1;

[0048] S101: If the negative pressure dust suction valve 302 is not completely started, adjust the first delay time T1 to extend the negative pressure dust suction time;

[0049] S200: Start the unloading pneumatic valve 400 to open the unloading port of the slag bin for unloading;

[0050] S300: closing the unloading pneumatic valve 500 and performing post-dust collection for a predetermined time period equal to the second delay time T2;

[0051] S301: If the negative pressure dust suction valve 302 is not completely started, adjust the second delay time T2 to extend the negative pressure dust suction time;

[0052] S400: Open the back-blowing valve 600 and perform anti-blocking processing for a predetermined time period of a third delay time T3;

[0053] S500: unloading is completed.

[0054] By controlling the specific time of the first delay time T1 and the second delay time T2, it is possible to balance the dust collection effect and the slag discharge efficiency.

[0055] Based on the above, the beneficial effects of the present invention are:

[0056] 1. By setting the pipeline 301 and the negative pressure dust suction valve 302, instead of the dry slag machine, electric air lock feeder and other equipment, the negative pressure of the furnace is directly used for negative pressure dust suction, thus saving resources.

[0057] 2. By setting the adjustable first delay time T1 and the second delay time T2, the negative pressure dust suction module 300 performs pre-dust suction or post-dust suction for a predetermined time to improve the dust suction efficiency, and at the same time can appropriately speed up the slag discharge speed, that is, balance the dust collection effect and the slag discharge efficiency.

[0058] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0059] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0060] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A negative pressure vacuum system, characterized in that: include: A transition chamber (100), the cover of which is arranged outside the slag bin (A); A dust hood (200) which forms a closed space with the transition chamber (100), and a discharge port (A1) of the slag bin (A) passes through the dust hood (200), and a through groove (201) is provided on the dust hood (200), and the through groove (201) is connected to the transition chamber (100); A negative pressure dust collection module (300), one end of which is connected to the transition chamber (100), and the other end of which is connected to the negative pressure of the furnace; Before or after the slag bin (A) is unloaded, the negative pressure dust suction module (300) performs pre-dust suction or post-dust suction for a predetermined period of time.

2. The negative pressure dust collection system according to claim 1, characterized in that: The bottom of the dust hood (200) is provided with a mounting hole (202), and the discharge port (A1) of the slag bin (A) passes through the mounting hole (202).

3. The negative pressure dust collection system according to claim 2, characterized in that: A plurality of through grooves (201) are provided, and the plurality of through grooves (201) are evenly arranged in the circumferential direction around the mounting hole (202), and the distance from any same position of the plurality of through grooves (201) to the center of the mounting hole (202) is equal.

4. The negative pressure dust collection system according to claim 2 or 3, characterized in that: A plurality of through slots (201) are provided, and the plurality of through slots (201) are divided into at least two groups, and the number of through slots (201) in any group is the same.

5. The negative pressure dust collection system according to claim 4, characterized in that: The plurality of through slots (201) belonging to the same group are uniformly arranged in the circumferential direction around the mounting hole (202), and the distance from any same position of the plurality of through slots (201) belonging to the same group to the center of the mounting hole (202) is equal.

6. The negative pressure dust collection system according to claim 5, characterized in that: The centers of the plurality of through slots (201) belonging to the same group are located on the same arc, and the distances between the arcs formed by the centers of the plurality of through slots (201) in two adjacent groups are equal.

7. The negative pressure dust collection system according to claim 6, characterized in that: An extension line of a line connecting the center of any through slot (201) in any group and the center of the mounting hole (202) can pass through the center of another through slot (201) in the other group that is arranged at an interval.

8. The negative pressure dust collection system according to claim 1, characterized in that: The negative pressure dust suction module (300) comprises a pipeline (301) and a negative pressure dust suction valve (302) arranged on the pipeline (301); the pipeline (301) is connected to the furnace negative pressure; and the negative pressure dust suction valve (302) controls the opening or closing of the pipeline (301).

9. A negative pressure vacuuming method, characterized in that: The negative pressure dust collection system according to claim 8 comprises: Starting the negative pressure dust suction valve (302) to perform pre-dust suction for a predetermined time period equal to a first delay time T1; Start the unloading pneumatic valve (400) to open the unloading port of the slag bin for unloading; The unloading pneumatic valve (500) is closed, and post-dust suction is performed for a predetermined time period equal to a second delay time T2; Open the backflush valve (600) and perform anti-blocking treatment for a predetermined time period equal to a third delay time T3; Complete unloading.

10. The negative pressure dust collection method according to claim 9, characterized in that: If the negative pressure dust suction valve (302) is not fully started, the first delay time T1 and the second delay time T2 are adjusted to extend the negative pressure dust suction time; by controlling the specific time of the first delay time T1 and the second delay time T2, it is used to balance the dust collection effect and the slag discharge efficiency.

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