Full-automatic centralized control system for sludge carbonization process

Abstract

The application relates to a full-automatic centralized control system of a sludge carbonization process, which belongs to the field of sludge carbonization treatment and comprises an emergency stop module, an initialization module, a drying module, a carbonization module, a material flow module and a production module. The emergency stop module is used for controlling equipment to be forcibly switched into an emergency stop state. The initialization module is connected with the emergency stop module, receives an emergency stop end signal and controls the equipment to be forcibly switched into an initialization state. The drying module is connected with the initialization module, receives an initialization end signal, controls drying ignition preheating equipment to be switched into a drying preparation state and executes an ignition combustion preheating process. The carbonization module is connected with the initialization module, receives the initialization end signal and executes the ignition combustion preheating process. The material flow module is connected with the drying module and the carbonization module and controls material flow equipment to be switched into a working state. The production module is connected with the material flow module, receives a transportation end signal, controls the equipment to be switched into a production state and executes a normal production process. The application has the effect of improving the control efficiency of the carbonization process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sludge carbonization, in particular to a full-automatic centralized control system for sludge carbonization process. BACKGROUND

[0002] Sludge heat treatment is to heat the sludge, so that part of the organic matter is decomposed and the hydrophilic organic colloid material is hydrolyzed, and at the same time, the microorganisms in the sludge are destroyed to improve the dewatering performance of the sludge; the commonly used sludge heat treatment method includes sludge carbonization; sludge carbonization is a sludge stabilization treatment process aiming at obtaining carbon-containing solid products under anaerobic conditions; at present, the process equipment in the carbonization control system applied to sludge carbonization is relatively separate and dispersed, and the correlation is low, which affects the control efficiency of the carbonization process. SUMMARY

[0003] The present application provides a full-automatic centralized control system for sludge carbonization process, which has the characteristics of improving the control efficiency of the carbonization process.

[0004] The present application aims to provide a full-automatic centralized control system for sludge carbonization process.

[0005] The above application purpose of the present application is realized by the following technical scheme:

[0006] A full-automatic centralized control system for sludge carbonization process, comprising:

[0007] An emergency stop module for controlling the equipment to forcibly enter an emergency stop state and executing an emergency stop process; when the emergency stop process is determined to be ended, the emergency stop module outputs an emergency stop end signal;

[0008] An initialization module connected to the emergency stop module, receiving the emergency stop end signal, in response to the emergency stop end signal, controlling the equipment to forcibly enter an initialization state and executing an initialization process; when the initialization process is ended, the initialization module outputs an initialization end signal;

[0009] A drying module connected to the initialization module, receiving the initialization end signal, in response to the initialization end signal, controlling the drying ignition preheating equipment to enter a drying preparation state and executing an ignition combustion preheating process; when the ignition combustion preheating process is ended, the drying module outputs a drying preheating end signal;

[0010] A carbonization module connected to the initialization module, receiving the initialization end signal, in response to the initialization end signal, controlling the carbonization ignition preheating equipment to enter a carbonization preparation state and executing an ignition combustion preheating process; when the ignition combustion preheating process is ended, the carbonization module outputs a carbonization preheating end signal;

[0011] A logistics module is connected to the drying module and the carbonization module, receives the drying preheating end signal and the carbonization preheating end signal, controls the logistics equipment to switch to the working state and executes the logistics transportation process in response to the drying preheating end signal and the carbonization preheating end signal; and outputs a transportation end signal when the logistics transportation process ends.

[0012] A production module is connected to the logistics module, receives the transportation end signal, controls the equipment to switch to the production state and executes the normal production process in response to the transportation end signal.

[0013] The production module outputs an emergency stop switching signal when a fault occurs in the normal production process, and the emergency stop module starts to work in response to the emergency stop switching signal.

[0014] In a preferred example, the application can be further configured to include a shutdown module; the shutdown module is connected to the logistics module and the production module; outputs a stop signal after receiving the transportation end signal or the production start signal output by the production module; the drying module and the carbonization module receive the stop signal, and adjust the drying temperature and the carbonization temperature to the preheating temperature in response to the stop signal; the logistics module receives the stop signal, and controls the logistics equipment to stop and execute the emptying process in response to the stop signal.

[0015] In a preferred example, the application can be further configured to include a cracking shutdown module; the cracking shutdown module is connected to the production module, receives the production end signal output by the production module, and outputs a cracking signal; the drying module and the carbonization module receive the cracking signal, and adjust the drying temperature and the carbonization temperature to the preheating temperature and execute the nitrogen purging process in response to the cracking signal; output the cracking shutdown signal after the cracking shutdown module outputs the cracking shutdown signal for a specified time; the drying module and the carbonization module receive the cracking shutdown signal, and end the current process in response to the cracking shutdown signal.

[0016] In a preferred example, the application can be further configured to include a shutdown module; the shutdown module is connected to the logistics module and the production module; outputs a stop signal after receiving the transportation end signal or the production start signal output by the production module; the drying module and the carbonization module receive the stop signal, and adjust the drying temperature and the carbonization temperature to the preheating temperature in response to the stop signal; the logistics module receives the stop signal, and controls the logistics equipment to stop and execute the emptying process in response to the stop signal.

[0017] In a preferred example, the application can be further configured to include a shutdown module; the shutdown module is connected to the logistics module and the production module; outputs a stop signal after receiving the transportation end signal or the production start signal output by the production module; the drying module and the carbonization module receive the stop signal, and adjust the drying temperature and the carbonization temperature to the preheating temperature in response to the stop signal; the logistics module receives the stop signal, and controls the logistics equipment to stop and execute the emptying process in response to the stop signal.

[0018] The application can be further configured in a preferred example that the initialization process includes: performing valve state initialization reset operation; performing air, water and gas source index checking operation; performing circulating water pump starting operation; and performing air flow fan starting operation.

[0019] The application can be further configured in a preferred example that the logistics transportation process includes: performing dry feed sequence starting and dry temperature rising operation; performing carbonization feed sequence starting and carbonization temperature rising operation; performing pyrolysis feeding operation; and performing carbonization discharge sequence starting operation.

[0020] The application can be further configured in a preferred example that the ignition combustion preheating process performed by the dry module includes: dry ignition pre-starting condition preparation; performing purging and leak detection operation; performing ignition operation; and performing pre-warming operation.

[0021] The application can be further configured in a preferred example that the ignition combustion preheating process performed by the carbonization module includes: carbonization ignition pre-starting condition preparation; performing purging and leak detection operation; performing ignition operation; performing pre-warming operation; and pyrolysis device feeding preparation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a structural schematic diagram of a full-automatic centralized control system of a sludge carbonization process in an embodiment of the application.

[0023] Reference signs are explained as follows: 1, emergency stop module; 2, initialization module; 3, dry module; 4, carbonization module; 5, logistics module; 6, production module; 7, shutdown module; 8, pyrolysis closing module; and 9, fire stopping module. DETAILED DESCRIPTION

[0024] The specific embodiments are merely an explanation of the application, and are not a limitation of the application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the application.

[0025] To make the purpose, technical solutions and advantages of the embodiments of the application more clear, the technical solutions in the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are some embodiments of the application, but not all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by those skilled in the art without creative contribution are within the protection scope of the application.

[0026] The embodiments of the application will be described in further detail in combination with the drawings in the specification.

[0027] At present, the common sludge carbonization production process is as follows.

[0028] The material line includes sending the semi-dry sludge material from the upstream dewatering machine into the semi-dry sludge bin, and then into the drying machine for material drying through the drying feeding screw; with the operation of the drying machine, the material meets the drying residence time and falls out from the outlet; and then into the dry sludge buffer bin through the drying discharge screw and the conveying belt. The material from the drying buffer bin is linked into the carbonization machine inner cylinder through the AIR_LOCK sealing device and the carbonization feeding screw, and then runs; when the material meets the carbonization time, it falls out from the outlet; and then is sent into the pneumatic dust conveying system through the dust valve and the carbonization discharge screw.

[0029] The drying hot air source includes a three-party equipment drying ignition system, which provides drying hot air for the drying hot air furnace.

[0030] The carbonization hot air source includes a carbonization ignition system as a three-party equipment, which provides a part of the primary hot air for the carbonization hot air furnace. In addition, the pyrolysis gas produced from the carbonization machine is introduced into the carbonization hot air furnace through the cracking air blower, and is combusted with the combustion-supporting air supplemented by the secondary air blower to form another part of the primary hot air.

[0031] The hot air flow line includes the primary hot air provided by the carbonization hot air furnace, which flows through the carbonization machine outer cylinder to provide heat for the carbonization process, and the heat-exchanged hot air flows into the drying machine to be dried together with the drying hot air provided by the drying hot air furnace. Finally, it flows out from the outlet of the drying machine as flue gas; and is extracted by the ID air blower to the chimney.

[0032] It also includes auxiliary safety items. When an accident occurs, the nitrogen purging system performs emergency purging, and the cracking gas in the furnace is released to the atmosphere through the cracking air blower and the cracking release valve.

[0033] Through the functional analysis of the above process route and subject equipment, the following control function modules are formed; specifically, including carbonization pyrolysis combustion control, carbonization pyrolysis safety interlocking control, drying and baking safety interlocking control, material conveying line control, main ID air blower furnace pressure and safety interlocking control, pressure filter system interface communication control, pneumatic dust conveying interface control, carbonization hot air furnace ignition equipment interface combustion control, and drying hot air furnace ignition equipment interface combustion control.

[0034] Through the control functions of these blocks, the start-stop logic correlation of each other is assisted, that is, a complete carbonization distributed control system is formed; each functional module can be operated and started independently, but will also be alarmed and stopped by other functional modules.

[0035] In summary, in the actual production process, there are many interlocking conditions in advance, any one module operation running will involve other modules, which will cause the system to appear great disturbance and instability; if you want to keep the system stable production, improve the control efficiency of the system, you need to use another control method.

[0036] To solve the above problems, the application provides a sludge carbonization process full-automatic centralized control system, as shown in Figure 1 The sludge carbonization process full-automatic centralized control system includes an emergency stop module 1, an initialization module 2, a drying module 3, a carbonization module 4, a logistics module 5, a production module 6, a shutdown module 7, a cracking closing module 8 and a fire extinguishing module 9; wherein each module is the embodiment of each production state in the sludge carbonization process.

[0037] The emergency stop module 1 is used to control the equipment to forcibly enter the emergency stop state and execute the emergency stop process; when the emergency stop process is determined to be finished, the emergency stop module 1 outputs an emergency stop end signal; specifically, in the actual operation process, when the emergency stop button is pressed or other states occur, the equipment is forcibly cut into the emergency stop state, and the corresponding emergency stop process is executed until the emergency stop process is determined to be finished; wherein the emergency stop process includes main fan and furnace slow running; execute nitrogen emergency purging operation; execute nitrogen purging delay closing operation.

[0038] The initialization module 2 is connected to the emergency stop module 1 and receives the emergency stop end signal; in response to the emergency stop end signal, the equipment is forcibly cut into the initialization state and the initialization process is executed; when the initialization process is finished, the initialization module outputs an initialization end signal; specifically, when the emergency stop process is finished, press the initialization button, at this time all the equipment will be forcibly cut into the initialization state, and the corresponding initialization process is executed until the initialization process is determined to be finished; if there is a non-resettable fault in the initialization process, it will return to the initial state starting point; wherein the initialization process includes valve state initialization reset operation; execute the wind, water, gas source index check operation; execute the circulating water pump start operation; execute the air flow fan start operation.

[0039] The drying module 3 is connected to the initialization module 2, receives the initialization end signal, and in response to the initialization end signal, controls the drying ignition preheating device to cut into the drying preparation state and performs the ignition combustion preheating process; when the ignition combustion preheating process ends, the drying module 3 outputs a drying preheating end signal; specifically, under the condition that the initial state ends, the drying preheating button is pressed, the drying ignition preheating device cuts into the drying preparation state and performs the corresponding ignition combustion preheating process until the drying preheating process ends; if an unrecoverable fault occurs during the preheating process, the process returns to the starting point of the drying state according to the condition; wherein the ignition combustion preheating process performed by the drying module 3 includes: starting condition preparation before drying ignition; performing a leak detection operation; performing an ignition operation; performing a pre-warming operation.

[0040] The carbonization module 4 is connected to the initialization module 2, receives the initialization end signal, and in response to the initialization end signal, controls the carbonization ignition preheating device to cut into the carbonization preparation state and performs the ignition combustion preheating process; when the ignition combustion preheating process ends, the carbonization module 4 outputs a carbonization preheating end signal; specifically, under the condition that the initial state ends, the carbonization preheating button is pressed, the carbonization ignition preheating device cuts into the carbonization preparation state and performs the corresponding ignition combustion preheating process until the carbonization preheating process ends. If an unrecoverable fault occurs during the preheating process, the process returns to the starting point of the carbonization state according to the condition; wherein the ignition combustion preheating process performed by the carbonization module 4 includes: starting condition preparation before carbonization ignition; performing a leak detection operation; performing an ignition operation; performing a pre-warming operation; and preparing to put the cracking device into operation.

[0041] The logistics module 5 is connected to the drying module 3 and the carbonization module 4, receives the drying preheating end signal and the carbonization preheating end signal, and in response to the drying preheating end signal and the carbonization preheating end signal, controls the logistics device to cut into the working state and performs the logistics transportation process; when the logistics transportation process ends, the logistics module 5 outputs a transportation end signal; specifically, under the condition that the drying state and the carbonization state end, the logistics start button is pressed, the logistics line device cuts into the working state and performs the corresponding material line start sludge drying and carbonization transportation process until the material line complete start process ends; if an unrecoverable fault occurs during the logistics process, the process returns to the starting point of the logistics state according to the condition; wherein the logistics transportation process includes: performing drying feeding sequence start and drying temperature rising operation; performing carbonization feeding sequence start and carbonization temperature rising operation; performing cracking input operation; and performing carbonization discharging sequence start operation.

[0042] The production module 6 is connected with the logistics module 5, receives the transportation end signal, controls the equipment to switch into the production state and executes the normal production process in response to the transportation end signal; when a fault occurs in the normal production process, the production module 6 outputs an emergency stop switching signal, and the emergency stop module 1 starts to work in response to the emergency stop switching signal; specifically, under the condition that the logistics working state ends, the production start button is pressed, and the logistics line executes the operating parameters and logic in the normal production state; in addition, all the equipment interfaces including the cracking gas and other related equipment are switched into the automatic and adjusted to the production temperature, and the normal production state is started to be executed. During the production process, the operator generally monitors the automatic operation, alarm and light fault processing reset of all the equipment; when a heavy fault occurs, the emergency stop state is switched to preferentially.

[0043] The normal production state includes two steps: the normal production parameter logic of the logistics line is put into operation; and the cracking automation and other automation in the normal production state are put into operation; the normal production state is also provided with a plurality of monitoring states: when a light fault occurs, an alarm is given; when a temporary fault of the logistics occurs, temporary maintenance processing can be performed and the normal state production is timely restored; when a heavy fault occurs, the emergency stop process is jumped into.

[0044] The shutdown module 7 is connected with the logistics module 5 and the production module 6; after receiving the transportation end signal or the production start signal output by the production module 6, the shutdown module 7 outputs a stop signal; the drying module 3 and the carbonization module 4 receive the stop signal, and adjust the drying temperature and the carbonization temperature to the preheating temperature in response to the stop signal; the logistics module 5 receives the stop signal, and controls the logistics equipment to stop and execute the emptying process in response to the stop signal; specifically, under the condition that the logistics working state ends or the normal working state is entered, the normal stop button is pressed, the drying and carbonization temperatures are automatically adjusted to the preheating temperature, the logistics line starts to stop feeding and executes the emptying, and the normal shutdown process is executed; until the normal shutdown process is determined to end. If an unresettable fault occurs during the shutdown process, the process returns to the shutdown state starting point according to the condition; the normal shutdown state includes three steps: drying feeding emptying shutdown and drying temperature reduction; carbonization feeding emptying shutdown; carbonization feeding emptying shutdown and carbonization temperature reduction.

[0045] The cracking closing module 8 is connected with the production module 6, receives the production end signal output by the production module 6, and outputs a cracking signal; the drying module 3 and the carbonization module 4 receive the cracking signal, and in response to the cracking signal, adjust the drying temperature and the carbonization temperature to the preheating temperature, and perform the nitrogen blowing process; the cracking closing module 8 outputs the cracking closing signal after a specified time of the cracking closing signal, and the drying module 3 and the carbonization module 4 receive the cracking closing signal and end the current process in response to the cracking closing signal; specifically, in the normal state, the cracking closing button is pressed, the drying and carbonization temperatures are automatically adjusted to the preheating temperature, the nitrogen blowing process of 3 minutes is started, and the cracking closing process is performed; the cracking closing process is time-limited, and the drying preparation state and the carbonization preparation state are switched to the end point. In this state, the next process can be prepared to be performed in the material flow work state or in the fire extinguishing state; wherein the cracking closing state includes two steps: nitrogen blowing delay and cracking equipment closing.

[0046] The fire extinguishing module 9 is connected with the drying module 3 and the carbonization module 4, and outputs a fire extinguishing signal when the drying module 3 and the carbonization module 4 end the current process; the drying module 3 and the carbonization module 4 receive the fire extinguishing signal, enter the fire extinguishing process in response to the fire extinguishing signal, and perform the in-furnace cooling and blowing operation after the fire extinguishing process ends; specifically, in the drying preparation state or the carbonization preparation state, the fire extinguishing button is pressed, the drying and carbonization burners enter the fire extinguishing process respectively, the in-furnace cooling and blowing operation is continued after the fire extinguishing is completed, and the fire extinguishing process is performed; until the fire extinguishing process is determined to end; if an unquenchable fault occurs during the shutdown process, the process returns to the fire extinguishing state starting point according to the condition; after the fire extinguishing state is determined to end, the state acceptance automatically cuts into the initial state end point; wherein the fire extinguishing state includes three steps: carbonization fire extinguishing blowing reset, drying fire extinguishing blowing reset, and valve parameter initialization.

[0047] By using the above-mentioned manner, the process control layer is analyzed layer by layer, the mutual relationship among the process, the equipment and the specialty is analyzed, the logical relationship among the states in the production process is planned, the various existing decentralized control monomer objects are connected in the process to form a centralized control network, the process characteristics and the control system characteristics are matched, and the efficient and safe operation of the system is realized; by using the above-mentioned manner, the high reliability, the fast response and the full automation of the self-control system applied to the sludge carbonization process are realized; and the control efficiency of the system is improved.

[0048] The above description is merely exemplary of the application and the application of the principles thereof. It is not intended to exhaustively describe all possible implementations and variations that are within the scope of the present disclosure. Other implementations can readily occur to those skilled in the art and are deemed to be within the purview of the present disclosure. For example, the features of the various embodiments described above can be combined, rearranged, substituted, eliminated, and / or modified, in whole or in part, to produce other embodiments of the application. Thus, other implementations of the present disclosure are deemed to be within the purview and spirit of the present disclosure and the reasonable equivalents thereof.

Claims

1. A fully automated centralized control system for sludge carbonization process, characterized in that, include: The emergency stop module (1) is used to control the equipment to force it into an emergency stop state and execute the emergency stop process; when the emergency stop process is determined to be over, the emergency stop module (1) outputs an emergency stop end signal. The initialization module (2) is connected to the emergency stop module (1), receives the emergency stop end signal, and in response to the emergency stop end signal, controls the device to forcibly switch to the initialization state and executes the initialization process; when the initialization process ends, the initialization module (2) outputs the initialization end signal. The drying module (3) is connected to the initialization module (2), receives the initialization end signal, and responds to the initialization end signal to control the drying ignition preheating device to switch to the drying preparation state and execute the ignition combustion preheating process; when the ignition combustion preheating process ends, the drying module (3) outputs the drying preheating end signal. The carbonization module (4) is connected to the initialization module (2), receives the initialization end signal, and responds to the initialization end signal to control the carbonization ignition preheating equipment to switch to the carbonization preparation state and execute the ignition combustion preheating process; when the ignition combustion preheating process ends, the carbonization module (4) outputs the carbonization preheating end signal. The logistics module (5) is connected to the drying module (3) and the carbonization module (4), receives the drying preheating end signal and the carbonization preheating end signal, and responds to the drying preheating end signal and the carbonization preheating end signal to control the logistics equipment to enter the working state and execute the logistics transportation process; when the logistics transportation route ends, the logistics module (5) outputs the transportation end signal. The production module (6) is connected to the logistics module (5), receives the transportation end signal, and in response to the transportation end signal, controls the equipment to switch to the production state and executes the normal production process; When a fault occurs in the normal production process, the production module (6) outputs an emergency stop switching signal, and the emergency stop module (1) receives the emergency stop switching signal and starts working. The emergency stop procedure includes: slow operation of the main blower and furnace; execution of nitrogen emergency purging; and execution of nitrogen purging delayed shutdown. The ignition and combustion preheating process performed by the drying module (3) includes: preparing start-up conditions before drying and ignition; performing purging and leak detection operations; performing ignition operations; and performing preheating operations. The ignition and combustion preheating process performed by the carbonization module (4) includes: preparing the start-up conditions before carbonization ignition; performing purging and leak detection operations; performing ignition operations; performing preheating operations; and preparing the pyrolysis unit for operation.

2. The fully automated centralized control system for sludge carbonization process according to claim 1, characterized in that, It also includes a shutdown module (7); the shutdown module (7) is connected to the logistics module (5) and the production module (6); when the shutdown module (7) receives the transportation end signal or the production start signal output by the production module (6), it outputs a stop signal; the drying module (3) and the carbonization module (4) receive the stop signal and adjust the drying temperature and carbonization temperature to the preheating temperature in response to the stop signal; the logistics module (5) receives the stop signal and controls the logistics equipment to stop and execute the emptying process in response to the stop signal.

3. The fully automated centralized control system for sludge carbonization process according to claim 1, characterized in that, It also includes a pyrolysis shutdown module (8); the pyrolysis shutdown module (8) is connected to the production module (6), receives the production end signal output by the production module (6), and outputs a pyrolysis signal; the drying module (3) and carbonization module receive the pyrolysis signal, adjust the drying temperature and carbonization temperature to the preheating temperature in response to the pyrolysis signal, and perform a nitrogen purging process; after the pyrolysis shutdown module (8) outputs the pyrolysis shutdown signal for a specified time, it outputs the pyrolysis shutdown signal; the drying module (3) and carbonization module (4) receive the pyrolysis shutdown signal and end the current process in response to the pyrolysis shutdown signal.

4. The fully automated centralized control system for sludge carbonization process according to claim 3, characterized in that, It also includes a shutdown module (9); the shutdown module (9) is connected to the drying module (3) and the carbonization module (4). When the drying module (3) and the carbonization module (4) finish the current process, the shutdown module (9) outputs a shutdown signal; the drying module (3) and the carbonization module (4) receive the shutdown signal and enter the quenching process in response to the shutdown signal. After the quenching process is completed, the furnace cooling and purging operations are performed.

5. The fully automated centralized control system for sludge carbonization process according to claim 1, characterized in that, The logistics and transportation process includes: executing the drying feeding sequence start-up and drying heating operation; executing the carbonization feeding sequence start-up and carbonization heating operation; executing the pyrolysis input operation; and executing the carbonization discharge sequence start-up operation.

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