Industrial silicon flue gas dry desulfurization and denitrification dust removal system and process

Abstract

The invention relates to the technical field of industrial waste gas treatment, in particular to an industrial silicon flue gas dry desulfurization, denitrification and dust removal system and process, which comprises a waste heat boiler, a negative pressure large bag-type dust remover, an SDS (sodium dodecyl sulfate) desulfurization device, an SCR (selective catalytic reduction) low-temperature denitrification device and a chimney which are sequentially arranged along a flue gas discharge path, the negative pressure large bag-type dust remover is composed of a plurality of dust removal units which are arranged in sequence, the tops of the dust removal units are communicated through a smoke exhaust header pipe, and each dust removal unit can independently control the communication state with the smoke exhaust header pipe. According to the industrial silicon flue gas dry desulfurization and denitrification dust removal system provided by the invention, the negative pressure large bag-type dust remover is formed by separating the plurality of dust removal units which are arranged in sequence, and in the dust removal process, the communication state of one or more dust removal units and the smoke exhaust header pipe is closed; therefore, independent dust removal is carried out on a single dust removal unit in the negative-pressure large bag-type dust remover under the condition that the operation of the whole flue gas treatment system is not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste gas treatment, and in particular to an industrial silicon flue gas dry desulfurization, denitrification and dust removal system and process. Background Art

[0002] The industrial silicon flue gas dry desulfurization, denitrification and dust removal system provided by the present invention is formed by dividing a large negative pressure bag dust collector into a plurality of dust removal units arranged in sequence, the tops of the plurality of dust removal units are connected through a smoke exhaust main pipe, and each dust removal unit can independently control the connection state with the smoke exhaust main pipe, thereby realizing independent control of a single dust removal unit. During the cleaning process, by closing the connection state of a single or multiple dust removal units with the smoke exhaust main pipe, a single dust removal unit in the large negative pressure bag dust collector can be independently removed without affecting the operation of the entire flue gas treatment system. Summary of the invention

[0003] The object of the present invention is to provide a process, device, equipment and medium for dry desulfurization, denitrification and dust removal of industrial silicon flue gas to improve the above-mentioned problems.

[0004] In order to achieve the above objectives, the present application provides the following technical solutions:

[0005] On the one hand, an embodiment of the present application provides an industrial silicon flue gas dry desulfurization, denitrification and dust removal system, comprising: a waste heat boiler, a negative pressure large bag dust collector, an SDS desulfurization device, an SCR low-temperature denitrification device and a chimney arranged in sequence along the flue gas discharge path, characterized in that the negative pressure large bag dust collector is composed of a plurality of dust removal units arranged in sequence, the tops of the plurality of dust removal units are connected through a smoke exhaust main pipe, and each dust removal unit can independently control the connection state with the smoke exhaust main pipe, and a plurality of blowing pipe groups are provided in the smoke exhaust main pipe, and the blowing pipe groups correspond one-to-one to the dust removal units, and are used to blow air in the large bags in the dust removal units in the reverse direction, so that the smoke attached to the large bags falls into the funnel at the bottom of the dust removal unit.

[0006] Optionally, a pulse bag dust collector is provided between the SDS desulfurization device and the SCR low-temperature denitrification device.

[0007] Optionally, an induced draft fan is provided between the SCR low-temperature denitration device and the chimney, for conveying the flue gas in the SCR low-temperature denitration device to the chimney for discharge.

[0008] Optionally, the funnels at the bottom of the dust removal units through which the smoke falls are connected to a microsilica powder collection chamber, and the microsilica powder collection chamber is used to collect filter residues filtered out by the multiple dust removal units.

[0009] In a second aspect, this embodiment provides a dry desulfurization, denitrification and dust removal process for industrial silicon flue gas, the process comprising:

[0010] Real-time detection of the pressure value at the air inlet of the negative pressure large bag filter, and when the pressure value is greater than a preset threshold, an abnormal air supply pressure warning instruction is generated;

[0011] In response to the abnormal air supply pressure warning instruction corresponding to the negative pressure large bag dust collector, the most recent cleaning time node of each dust removal unit is retrieved in sequence, and the single operation time corresponding to each dust removal unit is generated based on the most recent cleaning time node;

[0012] The current blockage rate of each dust removal unit is calculated based on the arrangement position of each dust removal unit and the corresponding single operation time, and the current airflow distribution map is constructed based on the arrangement position of each dust removal unit and the corresponding blockage rate;

[0013] The ventilation volume corresponding to each dust removal unit is calculated based on the current airflow distribution diagram, and based on the difference between the ventilation volume corresponding to each dust removal unit and the theoretical ventilation volume, where the theoretical ventilation volume is the ventilation volume corresponding to the dust removal unit under ideal non-blocked conditions;

[0014] Multiple dust removal units are sorted in order from high to low according to the difference, and based on the difference between the current pressure value at the air inlet of the negative pressure large bag filter and the theoretical pressure value, at least one abnormal dust removal unit is marked, and a cleaning operation is performed on the marked abnormal dust removal unit.

[0015] Optionally, performing a dust cleaning operation on the marked abnormal dust removal unit includes:

[0016] Close the connection between the abnormal dust removal unit and the main smoke exhaust duct, and blow air in the large bag in the abnormal dust removal unit through the corresponding blowing pipe group of the abnormal dust removal unit, so that the smoke and dust attached to the large bag falls into the funnel at the bottom of the abnormal dust removal unit.

[0017] In a third aspect, an embodiment of the present application provides an industrial silicon flue gas dry desulfurization, denitrification and dust removal device, the device comprising a memory and a processor.

[0018] The memory is used to store computer programs; the processor is used to implement the steps of the above-mentioned industrial silicon flue gas dry desulfurization, denitrification and dust removal process when executing the computer program.

[0019] In a fourth aspect, an embodiment of the present application provides a medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the above-mentioned industrial silicon flue gas dry desulfurization, denitrification and dust removal process are implemented.

[0020] The beneficial effects of the present invention are:

[0021] The industrial silicon flue gas dry desulfurization, denitrification and dust removal system provided by the present invention is formed by dividing a large negative pressure bag dust collector into a plurality of dust removal units arranged in sequence, the tops of the plurality of dust removal units are connected through a smoke exhaust main pipe, and each dust removal unit can independently control the connection state with the smoke exhaust main pipe, thereby realizing independent control of a single dust removal unit. During the cleaning process, by closing the connection state of a single or multiple dust removal units with the smoke exhaust main pipe, a single dust removal unit in the large negative pressure bag dust collector can be independently removed without affecting the operation of the entire flue gas treatment system.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic structural diagram of an industrial silicon flue gas dry desulfurization, denitrification and dust removal system described in an embodiment of the present invention;

[0025] Figure 2 This is a process flow chart of dry desulfurization, denitrification and dust removal of industrial silicon flue gas described in an embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of an industrial silicon flue gas dry desulfurization, denitrification and dust removal equipment described in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals or letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] Embodiment 1:

[0030] like Figure 1 As shown, this embodiment provides an industrial silicon flue gas dry desulfurization, denitrification and dust removal system, comprising: a waste heat boiler, a negative pressure large bag dust collector, an SDS desulfurization device, an SCR low-temperature denitrification device and a chimney arranged in sequence along the flue gas discharge path, a pulse bag dust collector is arranged between the SDS desulfurization device and the SCR low-temperature denitrification device, and an induced draft fan is arranged between the SCR low-temperature denitrification device and the chimney, which is used to transport the flue gas in the SCR low-temperature denitrification device to the chimney for discharge, the negative pressure large bag dust collector is composed of a plurality of dust removal units arranged in sequence, the tops of the plurality of dust removal units are connected through a smoke exhaust main pipe, and each dust removal unit can independently control the connection state with the smoke exhaust main pipe, and a plurality of blowing pipe groups are arranged in the smoke exhaust main pipe, and the blowing pipe groups correspond to the dust removal units one by one, and are used to blow air in the large bags in the dust removal units in the reverse direction, so that the smoke attached to the large bags falls into the funnel at the bottom of the dust removal unit.

[0031] Secondly, the funnels at the bottom of the dust removal units through which the smoke falls are connected to a microsilica powder collection chamber, and the microsilica powder collection chamber is used to collect the filter residues filtered out by the multiple dust removal units.

[0032] The industrial silicon flue gas dry desulfurization, denitrification and dust removal system provided in the present embodiment is formed by dividing a large negative pressure bag dust collector into a plurality of dust removal units arranged in sequence, the tops of the plurality of dust removal units are connected through a smoke exhaust main pipe, and each dust removal unit can independently control the connection status with the smoke exhaust main pipe, thereby realizing independent control of a single dust removal unit. During the cleaning process, by closing the connection status of a single or multiple dust removal units with the smoke exhaust main pipe, a single dust removal unit in the large negative pressure bag dust collector can be independently cleaned without affecting the operation of the entire flue gas treatment system.

[0033] Embodiment 2:

[0034] like Figure 2 As shown, the embodiment of the present application is used to provide a dry desulfurization, denitrification and dust removal process for industrial silicon flue gas, the process comprising:

[0035] Step S1, detecting the pressure value at the air inlet of the negative pressure large bag filter in real time, and generating an abnormal air supply pressure warning instruction when the pressure value is greater than a preset threshold;

[0036] Step S2, in response to the abnormal air supply pressure warning instruction corresponding to the negative pressure large bag dust collector, sequentially retrieve the most recent cleaning time node of each dust removal unit, and generate a single operation time corresponding to each dust removal unit based on the most recent cleaning time node;

[0037] Step S3, calculating the current blockage rate of each dust removal unit based on the arrangement position of each dust removal unit and the corresponding single operation time, and constructing a current airflow distribution diagram based on the arrangement position of each dust removal unit and the corresponding blockage rate;

[0038] Step S4, calculating the ventilation volume corresponding to each dust removal unit based on the current airflow distribution diagram, and based on the difference between the ventilation volume corresponding to each dust removal unit and the theoretical ventilation volume, where the theoretical ventilation volume is the ventilation volume corresponding to the dust removal unit under ideal non-blocked conditions;

[0039] Step S5, sort the multiple dust removal units in descending order according to the difference, and mark at least one abnormal dust removal unit based on the difference between the current pressure value at the air inlet of the negative pressure large bag filter and the theoretical pressure value, and perform a cleaning operation on the marked abnormal dust removal unit.

[0040] Secondly, the cleaning operation is performed on the marked abnormal dust removal unit. The specific implementation method is: close the connection between the abnormal dust removal unit and the main smoke exhaust duct, and blow air in the large bag in the abnormal dust removal unit through the blowing pipe group corresponding to the abnormal dust removal unit, so that the smoke and dust attached to the large bag falls into the funnel at the bottom of the abnormal dust removal unit.

[0041] Embodiment 3:

[0042] Corresponding to the above method embodiment, the embodiment of the present disclosure also provides an industrial silicon flue gas dry desulfurization, denitrification and dust removal equipment. The industrial silicon flue gas dry desulfurization, denitrification and dust removal equipment described below and the industrial silicon flue gas dry desulfurization, denitrification and dust removal process described above can be referenced to each other.

[0043] Figure 3 FIG. 8 is a block diagram of an industrial silicon flue gas dry desulfurization, denitrification and dust removal device 800 according to an exemplary embodiment. Figure 3 As shown, the electronic device 800 may include: a processor 801 and a memory 802. The electronic device 800 may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0044] The processor 801 is used to control the overall operation of the electronic device 800 to complete all or part of the steps in the above-mentioned industrial silicon flue gas dry desulfurization, denitrification and dust removal process. The memory 802 is used to store various types of data to support the operation of the electronic device 800, and these data may include, for example, instructions for any application or method used to operate on the electronic device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone, which is used to receive external audio signals. The received audio signal may be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 may include: Wi-Fi module, Bluetooth module, NFC module.

[0045] In an exemplary embodiment, the electronic device 800 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to perform the above-mentioned industrial silicon flue gas dry desulfurization, denitrification and dust removal process.

[0046] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned industrial silicon flue gas dry desulfurization, denitrification and dust removal process are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 802 including program instructions, and the above-mentioned program instructions can be executed by the processor 801 of the electronic device 800 to complete the above-mentioned industrial silicon flue gas dry desulfurization, denitrification and dust removal process.

[0047] Embodiment 4:

[0048] Corresponding to the above method embodiment, the embodiment of the present disclosure further provides a readable storage medium. The readable storage medium described below and the industrial silicon flue gas dry desulfurization, denitrification and dust removal process described above can be referenced to each other.

[0049] A readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the industrial silicon flue gas dry desulfurization, denitrification and dust removal process of the above method embodiment.

[0050] The readable storage medium may specifically be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or other readable storage medium that can store program codes.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An industrial silicon flue gas dry desulfurization, denitrification and dust removal system, characterized in that: include: A waste heat boiler, a negative pressure large bag dust collector, an SDS desulfurization device, an SCR low-temperature denitrification device and a chimney are arranged in sequence along the flue gas discharge path, characterized in that the negative pressure large bag dust collector is composed of a plurality of dust removal units arranged in sequence, the tops of the plurality of dust removal units are connected through a smoke exhaust main pipe, and each dust removal unit can independently control the connection state with the smoke exhaust main pipe, a plurality of blowing pipe groups are arranged in the smoke exhaust main pipe, and the blowing pipe groups correspond to the dust removal units one by one, and are used for reverse blowing into the large bags in the dust removal units, so that the smoke attached to the large bags falls into the funnel at the bottom of the dust removal units.

2. The industrial silicon flue gas dry desulfurization, denitrification and dust removal system according to claim 1 is characterized in that: A pulse bag dust collector is provided between the SDS desulfurization device and the SCR low-temperature denitration device.

3. The industrial silicon flue gas dry desulfurization, denitrification and dust removal system according to claim 1 is characterized in that: An induced draft fan is provided between the SCR low-temperature denitration device and the chimney, for conveying the flue gas in the SCR low-temperature denitration device to the chimney for discharge.

4. The industrial silicon flue gas dry desulfurization, denitrification and dust removal system according to claim 1 is characterized in that: The funnels at the bottom of the dust removal units through which the smoke falls are connected to a microsilica powder collection chamber, and the microsilica powder collection chamber is used to collect the filter residues filtered out by the multiple dust removal units.

5. A dry desulfurization, denitrification and dust removal process for industrial silicon flue gas, characterized in that: The process comprises: Real-time detection of the pressure value at the air inlet of the negative pressure large bag filter, and when the pressure value is greater than a preset threshold, an abnormal air supply pressure warning instruction is generated; In response to the abnormal air supply pressure warning instruction corresponding to the negative pressure large bag dust collector, the most recent cleaning time node of each dust removal unit is retrieved in sequence, and the single operation time corresponding to each dust removal unit is generated based on the most recent cleaning time node; The current blockage rate of each dust removal unit is calculated based on the arrangement position of each dust removal unit and the corresponding single operation time, and the current airflow distribution map is constructed based on the arrangement position of each dust removal unit and the corresponding blockage rate; The ventilation volume corresponding to each dust removal unit is calculated based on the current airflow distribution diagram, and based on the difference between the ventilation volume corresponding to each dust removal unit and the theoretical ventilation volume, where the theoretical ventilation volume is the ventilation volume corresponding to the dust removal unit under ideal non-blocked conditions; Multiple dust removal units are sorted in order from high to low according to the difference, and based on the difference between the current pressure value at the air inlet of the negative pressure large bag filter and the theoretical pressure value, at least one abnormal dust removal unit is marked, and a cleaning operation is performed on the marked abnormal dust removal unit.

6. The industrial silicon flue gas dry desulfurization, denitrification and dust removal process according to claim 5, characterized in that: Perform dust cleaning operations on the marked abnormal dust removal units, including: Close the connection between the abnormal dust removal unit and the main smoke exhaust duct, and blow air in the large bag in the abnormal dust removal unit through the corresponding blowing pipe group of the abnormal dust removal unit, so that the smoke and dust attached to the large bag falls into the funnel at the bottom of the abnormal dust removal unit.

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