Module type fuel gas shock wave soot blower capable of preventing dew point corrosion

Abstract

The utility model discloses a dew point corrosion prevention modular fuel gas shock wave soot blower which comprises a gas source measurement and control module, N mixed ignition modules, a plurality of shock wave generator modules, 2N reverse blowing monitoring modules and an electric control cabinet. An air inlet interface, an air outlet interface, a fuel gas inlet interface and a fuel gas outlet interface are arranged on a shell of the gas source measurement and control module; a shell of each mixed ignition module is provided with an air inlet connector, a fuel gas inlet connector and a deflagration mixed gas outlet connector; and each shock wave generator module comprises a shock wave generator body, and a mixed gas inlet interface, a shock wave nozzle, a reverse blowing interface and a furnace wall sealing fixing piece which are arranged on the shock wave generator body. The dew point corrosion prevention modular fuel gas shock wave soot blower adopts modular design, is directly installed and used on site, has the advantages of being safe and reliable in performance, convenient to install and overhaul and easy to maintain and operate, and can meet the requirement for long-period operation of a boiler.

Description

Technical Field

[0001] The utility model relates to a dew point corrosion resistant modular gas shock wave soot blower, which is mainly suitable for cleaning ash from heating surfaces of waste heat boilers or general boilers used in refining, metallurgy, cement kilns and calcining kilns, and is particularly suitable for cleaning ash from heating surfaces of boilers with positive pressure, loose ash, sulfur-containing flue gas or flue gas with certain corrosiveness. Background Art

[0002] The soot on the boiler heating surface is one of the important reasons that affect the heat exchange performance of the boiler. At present, the boiler soot blower is a necessary measure to ensure the normal and efficient operation of the boiler in engineering applications. The gas shock wave soot blower is one of the better methods among many soot blowing methods. The existing gas shock wave soot blower equipment on the market is generally composed of different numbers of functional valves. Most of the installation sites use flanges and pipe clamps to temporarily assemble different valves that realize the single function of soot blowing according to needs. After the assembly is completed, gas is used on site for gas distribution, testing, debugging and trial soot blowing. Considering that the gas shock wave soot blower is a deflagration equipment in a limited space, there are certain safety hazards in on-site debugging. In addition, due to the improvement of environmental protection standards, all boilers are basically equipped with desulfurization and denitrification equipment. The heating surface of the boiler generally works in positive pressure flue gas, which causes dew point corrosion of the shock wave generator. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a dew point corrosion resistant modular gas shock wave soot blower, which adopts modular design, is assembled and debugged in the factory, and can be directly installed and used on site. It has the advantages of safe and reliable performance, convenient installation and maintenance, and easy maintenance and operation, and can meet the needs of long-term operation of boilers.

[0004] The technical solution to achieve the above purpose is: a dew point corrosion-resistant modular gas shock wave soot blower, including a gas source measurement and control module, N mixed ignition modules, multiple shock wave generator modules, 2N back-blowing monitoring modules and an electrical control cabinet, wherein:

[0005] The housing of the gas source measurement and control module is provided with an air inlet interface, an air outlet interface, a gas inlet interface and a gas outlet interface;

[0006] The housing of each mixed ignition module is provided with an air intake interface, a gas intake interface and a deflagration mixed gas outlet interface;

[0007] Each shock wave generator module includes a shock wave generator body and a mixed gas inlet interface, a shock wave nozzle, a back-blowing air interface and a furnace wall sealing fixing member arranged on the shock wave generator body;

[0008] Each back-blowing monitoring module includes an air inlet quick connector, a cut-off valve, a monitor, a throttling element and a plurality of air outlet quick connectors connected in sequence;

[0009] The air inlet interface and the gas inlet interface of the gas source measurement and control module are connected to the combustion-supporting air pipeline and the soot-blowing gas pipeline of the public engineering in a one-to-one correspondence; the air outlet interface of the gas source measurement and control module is divided into N paths and connected to the air inlet interfaces of the N mixed ignition modules in a one-to-one correspondence; the gas outlet interface of the gas source measurement and control module is divided into N paths and connected to the gas inlet interfaces of the N mixed ignition modules in a one-to-one correspondence;

[0010] The deflagration mixture outlet interface of each mixed ignition module has a plurality of branch outlets, the total number of branch outlets of the deflagration mixture outlet interfaces of all mixed ignition modules is equal to the number of the shock wave generator modules, and all branch outlets are connected to the mixture inlet interfaces of the plurality of shock wave generator modules in a one-to-one correspondence;

[0011] Each shock wave generator module is connected to the furnace wall embedded parts of the boiler through the furnace wall sealing fixings;

[0012] The air inlet quick interfaces of the 2N back-blowing monitoring modules are all externally connected to the back-blowing ducts of the public works, the total number of the air outlet quick interfaces of all the back-blowing monitoring modules is equal to the number of the shock wave generator modules, and all the air outlet quick interfaces are connected to the back-blowing interfaces of the multiple shock wave generator modules in a one-to-one correspondence;

[0013] The electrical control cabinet is externally connected to a public power source, and the electrical control cabinet is electrically connected to the gas source measurement and control module and N mixed ignition modules respectively.

[0014] In the above-mentioned anti-dew point corrosion modular gas shock wave soot blower, the N mixed ignition modules are connected in parallel; and the 2N back-blowing monitoring modules are connected in parallel.

[0015] The utility model discloses a modular gas shock wave soot blower with anti-dew point corrosion, in which all units are manufactured in a factory according to functional modularization, and an anti-blowing monitoring module is integrated, so that it can be assembled and debugged in the factory and directly installed and used on site. It has the advantages of safe and reliable performance, convenient installation and maintenance, prevention of flue gas dew point corrosion and easy maintenance and operation, and can meet the needs of long-term operation of boilers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the anti-dew point corrosion modular gas shock wave soot blower of the utility model;

[0017] Figure 2 It is a side view of the dew point corrosion-resistant modular gas shock wave soot blower of the utility model. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the utility model, the specific implementation method thereof is described in detail below in conjunction with the accompanying drawings:

[0019] See also Figure 1 and Figure 2 The best embodiment of the utility model, a dew point corrosion resistant modular gas shock wave soot blower, comprises a gas source measurement and control module 1, three mixed ignition modules 2, 36 shock wave generator modules 3, six back-blowing monitoring modules 4 and an electrical control cabinet 5.

[0020] The shell of the gas source measurement and control module 1 is provided with an air inlet interface, an air outlet interface, a gas inlet interface and a gas outlet interface. The shell of each mixed ignition module 2 is provided with an air inlet interface, a gas inlet interface and a deflagration mixed gas outlet interface. Each shock wave generator module 3 includes a shock wave generator body and a mixed gas inlet interface, a shock wave nozzle, a back-blowing interface and a furnace wall sealing fixture arranged on the shock wave generator body.

[0021] Each back-blowing monitoring module 4 comprises an air inlet quick interface, a shut-off valve, a monitor, a throttling element and six air outlet quick interfaces which are connected in sequence, and each functional component is assembled into a module before leaving the factory.

[0022] The air inlet interface and the gas inlet interface of the gas source measurement and control module 1 are connected to the combustion air pipeline and the soot blowing gas pipeline of the public engineering in a one-to-one correspondence; the air outlet interface of the gas source measurement and control module 1 is divided into three paths and connected to the air inlet interfaces of the three mixed ignition modules 2 in a one-to-one correspondence; the gas outlet interface of the gas source measurement and control module 1 is divided into three paths and connected to the gas inlet interfaces of the three mixed ignition modules 2 in a one-to-one correspondence. The three mixed ignition modules 2 are connected in parallel.

[0023] The deflagration mixture outlet interface of each mixed ignition module 2 has 6 branch outlets, and each branch outlet is divided into two paths to connect two shock wave generator modules 3. In this way, there are 36 branch outlets in total, and the mixed gas inlet interfaces of 36 shock wave generator modules 3 are connected to the 36 branch outlets of three mixed ignition modules 2 one by one. Each shock wave generator module 3 is connected to the furnace wall embedded parts of the boiler through the furnace wall sealing fixing parts.

[0024] The air inlet quick interfaces of the six back-blowing monitoring modules 4 are all connected to the back-blowing ducts of the public works, and the six back-blowing monitoring modules 4 are connected in parallel. The six back-blowing monitoring modules 4 have a total of 36 air outlet quick interfaces, and the 36 air outlet quick interfaces are connected to the back-blowing interfaces of the 36 shock wave generator modules 3 one by one.

[0025] The power inlet of the electrical control cabinet 5 is connected to the public engineering power supply through the reserved terminals, and the control function terminals of the electrical control cabinet 5 are respectively connected to the reserved electrical terminals of the gas source measurement and control module 1 and the three mixed ignition modules 2.

[0026] The utility model discloses a dew point corrosion-resistant modular gas shock wave soot blower, in which shock wave soot blowing functions are integrated in various functional modules, and the various functional modules are connected to form an integral shock wave soot blower system through pipelines and electrical circuits.

[0027] The gas source measurement and control module 1 consists of a shell, an air measurement and control component and a gas measurement and control component arranged in the shell, and an air inlet interface, an air outlet interface, a gas inlet interface and a gas outlet interface arranged on the shell; all interfaces and components are integrated and installed in the module shell at the manufacturing factory, and are only connected to the external connection pipes by inlets and outlets.

[0028] Each mixed ignition module 2 is composed of a housing, a mixed air control component, a mixed gas control component, a mixed flame arrester and a high-voltage igniter arranged in the housing, and an air intake interface, a gas intake interface and a deflagration mixed gas outlet interface arranged on the housing. The housing of the mixed ignition module 2 is also provided with a centralized explosion-proof junction box terminal. All interfaces and components are integrated and installed in the housing at the manufacturing factory, and are only connected to the outside through the inlet and outlet.

[0029] The shock wave generator module 3 only needs to be connected to the pre-embedded parts of the furnace wall of the boiler through the furnace wall sealing fixtures on site. The electrical control cabinet 5 integrates a programmable controller (PLC), a touch screen and electrical function control components, and is externally connected to the gas source measurement and control module 1 and the centralized explosion-proof junction box terminals of each mixed ignition module 1 through a multi-core combustion-supporting wire.

[0030] The utility model anti-dew point corrosion modular gas shock wave soot blower has all functional units manufactured in a factory modularized manner and only needs to be connected to each other with pipelines and electrical wiring on site. All functional unit modules are divided into four parts according to their functions: gas source measurement and control module 1, mixed ignition module 2, shock wave generator module 3 and back-blowing monitoring module 4. Each functional unit is uniformly controlled by an electrical control cabinet 5.

[0031] The installation of multiple hybrid ignition modules on site can be dispersed on each layer of sootblowing surface, or multiple units can be concentrated to form a larger module group.

[0032] The excitation generator module 3 and the back-blowing monitoring module 4 are used in combination. The back-blowing monitoring module 4 controls the back-blowing volume entering the shock generator module 3 through its internal throttling element, so that a positive pressure zone is formed inside the shock generator body, which can effectively prevent the boiler flue gas from entering the shock generator, thereby avoiding dew point corrosion.

[0033] The specific soot blowing process control of the anti-dew point corrosion modular gas shock wave soot blower of the utility model is as follows:

[0034] First, the electrical control cabinet 5 is powered on, the main soot-blowing gas control valve is opened, and the functional units in each functional module (combustion air control valve, soot-blowing gas control valve and igniter, etc.) are in a standby state;

[0035] Secondly, start the first round of soot blowing, starting from the first branch of the first mixed ignition module 2, and the process of each branch is as follows:

[0036] Combustion air control valve opens (11s) → soot blowing gas valve opens (7s) → combustion air control valve opens and soot blowing gas valve closes (0.5s) → high pressure igniter opens (0.5s) → combustion air control valve opens (11s);

[0037] After the first branch is completed, it will turn to the next branch. After the first round of soot blowing is completed on all branches, the second round of soot blowing will be carried out again from the first branch;

[0038] Finally, after two rounds of sootblowing are completed, turn off the power supply and the main sootblowing gas valve.

[0039] The functions of each module of the utility model anti-dew point corrosion modular gas shock wave soot blower are as follows:

[0040] The main function of the gas source measurement and control module 1 is to pre-adjust the combustion air and soot-blowing gas so that the air and gas work within the predetermined pressure and flow range;

[0041] The main functions of the three mixed ignition modules 2 are to control the purging, charging, ignition and post-purging of the combustion air and soot-blowing gas of each branch, ensuring that each branch can be charged with accurately proportioned mixed gas into the shock wave generator and ignited reliably every time;

[0042] The main function of the 36 shock wave generator modules 3 is to provide sufficient volume to ensure that the ignited mixed gas quickly burns, heats up and pressurizes in a limited space to generate shock waves;

[0043] The main function of the six back-blowing air monitoring modules 4 is to blow sufficient back-blowing air into the nozzle to prevent the sulfur-containing flue gas in the boiler from flowing back into the shock wave generator.

[0044] The main function of the electrical control cabinet 5 is to control the electrical components of each branch to operate according to the set program to ensure normal soot blowing.

[0045] In summary, the utility model's anti-dew point corrosion modular gas shock wave soot blower adopts a modular design, is assembled and debugged in the factory, and can be directly installed and used on site. It has the advantages of safe and reliable performance, convenient installation and maintenance, and easy maintenance and operation, and can meet the needs of long-term operation of boilers.

[0046] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A modular gas shock wave soot blower with anti-dew point corrosion, characterized in that: It includes a gas source measurement and control module, N mixed ignition modules, multiple shock wave generator modules, 2N back-blowing monitoring modules and an electrical control cabinet, including: The housing of the gas source measurement and control module is provided with an air inlet interface, an air outlet interface, a gas inlet interface and a gas outlet interface; The housing of each mixed ignition module is provided with an air intake interface, a gas intake interface and a deflagration mixed gas outlet interface; Each shock wave generator module includes a shock wave generator body and a mixed gas inlet interface, a shock wave nozzle, a back-blowing air interface and a furnace wall sealing fixing member arranged on the shock wave generator body; Each back-blowing monitoring module includes an air inlet quick connector, a cut-off valve, a monitor, a throttling element and a plurality of air outlet quick connectors connected in sequence; The air inlet interface and the gas inlet interface of the gas source measurement and control module are connected to the combustion-supporting air pipeline and the soot-blowing gas pipeline of the public engineering in a one-to-one correspondence; the air outlet interface of the gas source measurement and control module is divided into N paths and connected to the air inlet interfaces of the N mixed ignition modules in a one-to-one correspondence; the gas outlet interface of the gas source measurement and control module is divided into N paths and connected to the gas inlet interfaces of the N mixed ignition modules in a one-to-one correspondence; The deflagration mixture outlet interface of each mixed ignition module has a plurality of branch outlets, the total number of branch outlets of the deflagration mixture outlet interfaces of all mixed ignition modules is equal to the number of the shock wave generator modules, and all branch outlets are connected to the mixture inlet interfaces of the plurality of shock wave generator modules in a one-to-one correspondence; Each shock wave generator module is connected to the furnace wall embedded parts of the boiler through the furnace wall sealing fixings; The air inlet quick interfaces of the 2N back-blowing monitoring modules are all externally connected to the back-blowing ducts of the public works, the total number of the air outlet quick interfaces of all the back-blowing monitoring modules is equal to the number of the shock wave generator modules, and all the air outlet quick interfaces are connected to the back-blowing interfaces of the multiple shock wave generator modules in a one-to-one correspondence; The electrical control cabinet is externally connected to a public power source, and the electrical control cabinet is respectively connected to the gas source measurement and control module and N mixed ignition modules.

2. The anti-dew point corrosion modular gas shock wave soot blower according to claim 1, characterized in that: The N mixed ignition modules are connected in parallel; the 2N back-blowing monitoring modules are connected in parallel.

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