CN217838815U

CN217838815U - Sludge carbonization pyrolysis system

Info

Publication number: CN217838815U
Application number: CN202222399658.7U
Authority: CN
Inventors: 杨永茂; 李中杰; 银正一; 吴云生; 安莹玉
Original assignee: Beijing Enterprises Water China Investment Co Ltd
Current assignee: Beijing Enterprises Water China Investment Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2022-11-18
Anticipated expiration: 2032-09-09

Abstract

The application provides a sludge carbonization pyrolysis system which comprises a material conveying device, a carbonization furnace, a hot blast stove, a discharge device and a safety interlocking device; the carbonization furnace is provided with a cracking cavity, a heating cavity, an ash residue outlet, an air inlet and an air outlet which are all communicated with the cracking cavity, and the material conveying device is communicated with the cracking cavity; the cracking cavity and the heating cavity are respectively communicated with the hot blast stove through a first pipeline and a second pipeline; the safety interlocking device comprises a material meter, a first valve, a second valve, a third valve and an oxygen meter, wherein the material meter is connected with the carbonization furnace and used for detecting the height of the ash level of the ash residue outlet; the first valve is arranged at the air inlet, the second valve is arranged on the first pipeline, and the third valve is arranged at the air outlet; the oxygen measuring instrument is connected with the carbonization furnace and is used for detecting the oxygen content in the carbonization furnace. The pyrolysis system can reasonably and effectively monitor a plurality of nodes which are easy to cause serious accidents, realizes automatic protection and has high safety.

Description

Sludge carbonization pyrolysis system

Technical Field

The application relates to the field of environmental protection equipment, in particular to a sludge carbonization pyrolysis system.

Background

A sludge carbonization pyrolysis technology belongs to one of sludge disposal technologies in the environmental protection industry. According to the characteristics of the environmental protection industry, most process manufacturers and experts pay more attention to the aspects of energy conservation, consumption reduction and environmental emission in the carbonization process. The safe preparation and safe use of the cracked gas in the production process are weaker in comprehension, regulation and standard compared with energy industries such as petrochemical metallurgy. The main components of the sludge high-temperature pyrolysis gas are combustible gases such as CO, H2, alkanes and the like, and water vapor is mixed in the pyrolysis preparation process. According to actual production measurement, natural gas with the empirical calorific value of 1/5 is slightly lower than that of common coal gas, and explosive gas can still be formed when the natural gas is mixed with air. In addition, in actual production, the pyrolysis gas also has a certain concentration of dry sludge (organic matter) dust in the flowing process. Therefore, in addition to the prevention of gas explosion, safety measures against the explosion of organic dust must be taken into consideration.

At present, the mainstream environmental protection carbonization manufacturers in China do not form a unified safety concept and strict safety specifications aiming at the preparation and the treatment of the pyrolysis gas, so that a special device design and a safety control system are not formed. Most of the safety measures adopted by various manufacturers for preparing and using the pyrolysis gas are designed and controlled by taking the experience of some chemical industries as reference. Safety understanding depth of manufacturers is different, and experience methods for researching and searching are different, so that the design of safety devices and the level of control methods in the industry are different.

Research shows that the safe design of the pyrolysis system of the existing carbonization furnace has the following defects:

safety protection is not comprehensive enough, and the potential safety hazard is more.

SUMMERY OF THE UTILITY MODEL

The application provides a mud carbonization pyrolysis system to improve above-mentioned problem.

The utility model discloses it is specifically such:

in view of the above, the present embodiment provides a system for carbonizing and pyrolyzing sludge, comprising:

the device comprises a material conveying device, a carbonization furnace, a hot blast stove, a discharging device and a safety interlocking device; the carbonization furnace is provided with a cracking cavity, a heating cavity, an ash residue outlet, an air inlet and an air outlet which are all communicated with the cracking cavity, and the material conveying device is communicated with the cracking cavity; the cracking cavity and the heating cavity are respectively communicated with the hot blast stove through a first pipeline and a second pipeline;

the safety interlocking device comprises a material meter, a first valve, a second valve, a third valve and an oxygen measuring instrument, wherein the material meter is connected with the carbonization furnace and used for detecting the height of the ash level of the ash residue outlet; the first valve is arranged at the air inlet and used for controlling the on-off of the air inlet; the second valve is arranged on the first pipeline and used for controlling the on-off of the first pipeline; the third valve is arranged at the air outlet and used for controlling the on-off of the air outlet; the oxygen measuring instrument is connected with the carbonization furnace and is used for detecting the oxygen content in the carbonization furnace.

The utility model discloses an in the embodiment, the quantity of material meter is a plurality of, and is a plurality of the material meter is in interval arrangement is gone up to the direction of height of lime-ash export.

In an embodiment of the present invention, the safety interlock device further comprises a vacuum pressure switch and a high voltage switch both disposed on the first pipeline.

In an embodiment of the present invention, the safety interlock further comprises a temperature sensor, the temperature sensor is connected to the carbonization furnace for detecting the temperature in the carbonization furnace.

The utility model discloses an in an embodiment, safety interlock still includes the pressure differential changer, the malleation port of pressure differential changer with the schizolysis chamber intercommunication, the negative pressure port of pressure differential changer with the inner chamber intercommunication of hot-blast furnace.

The utility model discloses an in one embodiment, the safety interlock still includes pressure transmitter, be provided with on the carbide furnace with the gas transmission pipeline of air inlet intercommunication, pressure transmitter and first valve all locates on the gas transmission pipeline.

In an embodiment of the present invention, the material conveying device includes a drying machine and a spiral material conveyor, the drying machine is connected to the spiral material conveyor, and a third valve is disposed between the drying machine and the spiral material conveyor; and a discharge port of the spiral material conveyer is communicated with the cracking cavity.

In an embodiment of the present invention, the drying machine is provided with a preheating channel, the preheating channel is communicated with the heating chamber through a third pipeline.

The utility model discloses an in one embodiment, discharging equipment is including the dust removal mechanism, SOx/NOx control mechanism, air-blower and the burning tower that communicate in proper order, dust removal mechanism with preheat the passageway intercommunication.

The utility model discloses an in the embodiment, safety interlock still includes carbon monoxide analysis appearance, carbon monoxide analysis appearance is located preheat the passageway with between the dust removal mechanism, be used for detecting the entering the concentration of carbon monoxide in the gas of dust removal mechanism.

The utility model has the advantages that:

in summary, the sludge carbonization pyrolysis system provided by the embodiment is used for furnace body purging and air tightness detection before operation. Specifically, the second valve is closed and the first valve and the third valve are opened, inert gas such as nitrogen is input from the gas inlet, and oxygen in the cracking cavity can be discharged from the gas outlet in the process that the cracking cavity is filled with the inert gas, so that the oxygen content in the cracking cavity meets a set value, for example, the carbonization furnace can be purged for 5-10 minutes by using the inert gas. After purging is finished, the third valve, a pipeline for communicating the material conveying device with the cracking cavity and an ash residue outlet are closed, then, inert gas is continuously filled into the cracking cavity, pressure is maintained for a set time after the pressure in the cracking cavity meets a set value, if the pressure in the cracking cavity does not drop beyond a set pressure drop value within the set time, leakage between the cracking gas furnace and the pipeline is proved to be within a safe range, leakage detection is successful, the cracking cavity meets the requirement of air tightness, and ignition production can be carried out. And after the ignition is successful, the temperature starts to rise, the material conveying device is used for conveying materials to the carbonization furnace, hot air conveyed by the material hot blast stove is heated, the second valve is opened, and the carbonization furnace conveys pyrolysis gas to the hot blast stove. It should be appreciated that when the pressure drop value is not satisfactory, a leak detection failure is indicated, and a shutdown is required to check for a leak in the furnace. In the running process of the carbonization furnace, the oxygen measuring instrument can monitor the oxygen content in the cracking cavity in real time, if the oxygen content exceeds the standard, the oxygen is discharged, the gas explosion in the furnace is easily caused, and the carbonization furnace can automatically stop operation at the moment. Simultaneously, owing to be provided with the material meter, the ash level that can real time monitoring ash and slag export, homoenergetic control carbide furnace automatic shutdown operation when the ash level is higher than or is less than the default, so, at the mud cracking in-process, can detect and protect a plurality of nodes that easily appear serious incident, the security is high.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a sludge carbonization pyrolysis system provided by the present application;

fig. 2 is a schematic control flow diagram of the control system and the safety interlock device provided by the present application.

Icon:

001-control system; 100-a material conveying device; 110-a dryer; 120-spiral conveyer; 130-a delivery pipeline; 140-feed gas lock valve; 200-carbonization furnace; 210-ash outlet; 220-an air inlet; 221-a gas pipeline; 230-a first air outlet; 240-a second air outlet; 250-a first conduit; 260-a second conduit; 270-branch pipe; 280-a third conduit; 290-discharge air-lock valve; 300-a hot blast stove; 310-flame indicator light; 320-a secondary air fan; 400-a discharge device; 410-a dust removal mechanism; 420-a desulfurization and denitrification mechanism; 430-a blower; 440-a combustion tower; 450-a fourth conduit; 460-a fifth conduit; 470-a sixth conduit; 480-a seventh conduit; 500-a safety interlock; 510-a first material meter; 520-second material meter; 530-third material meter; 540-a first valve; 550-a second valve; 560-a third valve; 570-oxygen measuring instrument; 580-vacuum pressure switch; 590-high voltage switch; 610-a temperature sensor; 620-differential pressure transmitter; 630-a pressure transmitter; 640-carbon monoxide analyzer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is conventionally understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated sludge carbonization pyrolysis system or element must have a specific orientation, be configured and operated in a specific orientation, and thus, cannot be understood as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

At present, a sludge carbonization pyrolysis system depends on the experience of a supplier and understanding and cognition on the design and safety control of a pyrolysis gas safety device, and a device and a control system with strict specifications are not formed. The mainstream approved methods in the industry at present focus on: ignition purging, blowing out and exhausting and accident extinguishing. However, due to the different comprehensive consideration targets of manufacturers, the design and control methods of the devices are different, the accident prevention nodes are not comprehensive enough, and the safety protection performance is low.

In view of this, the designer has designed a mud carbonization pyrolysis system, can rationally monitor effectively to a plurality of nodes that easily appear serious accident, realizes automatic protection, improves the security in the sludge treatment process.

Referring to fig. 1 and fig. 2, in this embodiment, the sludge carbonization and pyrolysis system includes a material conveying device 100, a carbonization furnace 200, a hot blast stove 300, a discharging device 400, and a safety interlock device 500. Conveying device 100 is used for carrying mud to carbide furnace 200, carries out the pyrolysis to mud in the carbide furnace 200 and forms the pyrolysis gas and carry the pyrolysis gas to hot-blast furnace 300, and hot-blast furnace 300 can carry the gas and preheat the mud in the carbide furnace 200 to carbide furnace 200 through burning fuel at mud pyrolysis gas to can burn the pyrolysis gas and continuously provide the heat source after the pyrolysis gas produces in carbide furnace 200. The safety interlock device 500 can play a safety protection role in the operation process of the sludge carbonization pyrolysis system.

In this embodiment, optionally, the material conveying device 100 includes a drying machine 110 and a spiral conveyor 120, the drying machine 110 is connected to the spiral conveyor 120 through a material conveying pipeline 130, the sludge concentrated in the drying machine 110 can be conveyed to the spiral conveyor 120 through the material conveying pipeline 130, and the spiral conveyor 120 can convey the sludge to the carbonization furnace 200 for pyrolysis and cracking. Furthermore, a feed air lock valve 140 is provided on the feed line 130. In addition, a preheating passage (not shown) is provided on the drying machine 110.

In this embodiment, the carbonization furnace 200 is optionally provided with a cracking chamber (not shown), a heating chamber (not shown), an ash outlet 210, an air inlet 220, a first air outlet 230, and a second air outlet 240. The pyrolysis chamber and the heating chamber are independent of each other, the heating chamber can be arranged around the pyrolysis chamber, and the ash outlet 210, the air inlet 220, the first air outlet 230 and the second air outlet 240 are all communicated with the pyrolysis chamber. Taking the view angle in fig. 1 as an example, the ash outlet 210 is disposed at the lower right of the carbonization furnace 200, the air inlet 220 is disposed at the upper left of the carbonization furnace 200, the air transmission pipeline 221 is installed at the air inlet 220, and the first air outlet 230 is disposed at the upper right of the carbonization furnace 200. And, a first duct 250 is provided at the first air outlet 230, the first duct 250 communicating with the hot blast stove 300. A branch pipe 270 is arranged on the first pipeline 250, and the port of the branch pipe 270 far away from the first pipeline 250 is the second air outlet 240. Simultaneously, the heating chamber passes through second pipeline 260 and hot-blast furnace 300 intercommunication, and the heating chamber still communicates with preheating the passageway through third pipeline 280, so, the hot-air that the hot-blast furnace 300 operation in-process produced is carried to the heating chamber through second pipeline 260, heats the mud in the schizolysis intracavity to can also continue to carry to preheating the passageway through third pipeline 280 in, heat the mud in the desiccator 110, improve energy utilization.

In this embodiment, optionally, the discharging device 400 includes a dust removing mechanism 410, a desulfurization and denitrification mechanism 420, an air blower 430 and a combustion tower 440, which are sequentially arranged, and the dust removing mechanism 410 is communicated with the preheating channel through a fourth pipeline 450. The dust removing mechanism 410 is communicated with the desulfurization and denitrification mechanism 420 through a fifth pipeline 460, the desulfurization and denitrification mechanism 420 is communicated with the blower 430 through a sixth pipeline 470, and the blower 430 is communicated with the combustion tower 440 through a seventh pipeline 480. So design, the hot-air that produces when hot-blast furnace 300 operation in-process can pass through carbide furnace 200 and desiccator 110 in proper order to purify the back through dust removal mechanism 410, SOx/NOx control mechanism 420 and burn in combustion tower 440, can directly discharge after the burning, difficult influence air circumstance.

The dust removing means 410, the desulfurization and denitrification means 420, the blower 430, and the combustion tower 440 may be any conventionally known structure, and will not be described in detail in this embodiment.

Referring to fig. 1 and 2, in this embodiment, the safety interlock device 500 may optionally include a first material meter 510, a second material meter 520, a third material meter 530, a first valve 540, a second valve 550, a third valve 560, an oxygen meter 570, a vacuum pressure switch 580, a high pressure switch 590, a temperature sensor 610, a differential pressure transmitter 620, a pressure transmitter 630, and a carbon monoxide analyzer 640. It should be noted that the first material meter 510, the second material meter 520, the third material meter 530, the first valve 540, the second valve 550, the third valve 560, the oxygen measuring instrument 570, the vacuum pressure switch 580, the high pressure switch 590, the temperature sensor 610, the differential pressure transmitter 620, the pressure transmitter 630 and the carbon monoxide analyzer 640 are all in communication connection with the control system 001 of the carbonization pyrolysis system, so as to realize automatic interlocking control. The first material meter 510, the second material meter 520 and the third material meter 530 are all disposed on the carbonization furnace 200, and corresponding to the position of the ash outlet 210, the ash level height of the ash outlet 210 can be detected, wherein, taking the view angle in fig. 1 as an example, the first material meter 510, the second material meter 520 and the third material meter 530 are sequentially arranged from top to bottom, when ash is stacked to the height of the first material meter 510, at this time, organic dust is easy to drift out along with pyrolysis gas, which causes dust explosion in a subsequent process section, and therefore, when the control system 001 receives the ash level height information transmitted by the first material meter 510, the pyrolysis system is automatically controlled to stop operating. When ash is accumulated to the height of the third material meter 530, the ash level is too low, and the control system 001 can reduce the ash discharge speed or increase the feeding speed of sludge in the carbonization furnace 200 according to the ash level height information, so as to improve the condition that the ash level is too low and return the ash level to the safe height. Therefore, in the actual operation process, through the cooperation of a plurality of material meters, can realize that the schizolysis system can improve the security at second material meter 520 and third material meter 530's height with the early warning and the regulation and control of ash level height through adjusting defeated material speed and lime-ash discharge speed. It should be understood that in other embodiments, the number of the material meters is not limited to three, and is not listed in this embodiment.

The first valve 540 is disposed on the gas pipeline 221 and can control the on/off of the gas pipeline 221. The second valve 550 is disposed on the first pipe 250 and can control the on/off of the first pipe 250. The third valve 560 is provided in the branch pipe 270, and can control the opening and closing of the branch pipe 270. Wherein, the first valve 540, the second valve 550 and the third valve 560 can be set as pneumatic valves or electric valves.

The oxygen measuring instrument 570 is arranged on the carbonization furnace 200, can detect the oxygen content in the carbonization furnace 200, and transmits the information of the oxygen content to the control system 001, when the oxygen content of the oxygen measuring instrument 570 in the carbonization furnace 200 exceeds a set value, oxygen is discharged, and the explosion of gas in the furnace is easily caused, so that the control system 001 can automatically control the pyrolysis system to stop working according to the information.

Vacuum pressure switch 580 and high-voltage switch 590 all set up on first pipeline, during the schizolysis production, when the pressure value that high-voltage switch 590 detected was higher, it was serious to show that the gas leaked, easily caused the environment to leak the explosion, and at this moment, control system 001 can be according to this pressure information automated control pyrolysis system stop work. When the pressure value that vacuum pressure switch 580 obtained is lower, it is serious to show that the air is let out in, easily causes the furnace body damage and interior to let out explode, and at this moment, control system 001 can be according to this pressure information automated control pyrolysis system stop the operation.

Temperature sensor 610 sets up on carbide furnace 200 for detect the temperature in the carbide furnace 200, when temperature sensor 610 acquires that the stove temperature is higher, at this moment, control system 001 control hot-blast furnace 300 cools down, also controls the temperature of hot-blast air in hot-blast furnace 300, reduces and carries to pyrolysis chamber heat, and the temperature in pyrolysis chamber descends, improves the security of operation. When the temperature exceeds the set temperature value and can not be cooled within the set time, at the moment, the furnace body is easily burnt and broken, and the control system 001 can directly control the pyrolysis system to stop working.

The positive pressure port of the differential pressure transmitter 620 is communicated with the cracking cavity, and the negative pressure port of the differential pressure transmitter 620 is communicated with the inner cavity of the hot blast stove 300. In the cracking process, under the normal condition, the pressure in the carbonization furnace 200 is greater than the pressure in the hot blast stove 300, the cracked gas can move from the carbonization furnace 200 to the hot blast stove 300, when the pressure jump obtained from the positive pressure port of the differential pressure transmitter 620 does not exceed a second, the short-time fluctuation of the working condition in the furnace or the drift error of an instrument are considered, the pressure jump alarm indicates, the pressure jump obtained from the positive pressure port of the differential pressure transmitter 620 exceeds a second, the cracking and air leakage of the carbonization furnace 200 are shown, the mixed explosion of gas is easy to cause, and at the moment, the control system 001 can control the cracking system to stop working according to the information transmitted by the differential pressure transmitter 620. Meanwhile, when the pressure difference information collected by the pressure difference transmitter 620 is generated reversely and does not exceed b seconds, local tempering of the short-time pipeline may be generated, and the control system 001 starts a tempering alarm indication; when the pressure difference information collected by the pressure difference transmitter 620 is generated reversely for more than b seconds, the tempering pipeline and even the carbonization furnace 200 are prone to explosion, and at the moment, the control system 001 can control the cracking system to stop working according to the pressure difference information. Wherein, a can be 3 seconds, b can be 10 seconds, and the setting is as required according to the actual situation.

The pressure transmitter 630 is disposed on the gas transmission pipeline 221, and can acquire the pressure at the gas inlet 220. That is, before the cracking system is operated, the furnace body can be firstly swept and the airtightness of the combustion cavity can be firstly detected. Specifically, the second valve 550 is closed and the first valve 540 and the third valve 560 are opened, an inert gas such as nitrogen is input into the combustion chamber through the gas transmission pipeline 221, and oxygen in the cracking chamber can be discharged from the gas outlet during the process of filling the cracking chamber with the inert gas, so that the oxygen content in the cracking chamber meets a set value, for example, the carbonization furnace 200 can be purged with the inert gas for 5-10 minutes. After the purging is finished, the third valve 560, the feeding air-lock valve 140 and the discharging air-lock valve 290 arranged at the ash outlet 210 are closed, then, inert gas is continuously filled into the cracking cavity, the pressure is maintained for a set time after the pressure in the cracking cavity meets a set value, the pressure value is obtained through the pressure transmitter 630, if the pressure in the cracking cavity is reduced within the set time and does not exceed the set pressure reduction value, the leakage between the cracking gas furnace and the pipeline is proved to be in a safe range, the leakage detection is successful, the cracking cavity meets the air tightness requirement, and the ignition production can be carried out. After the ignition is successful, the temperature rises, the material conveying device 100 is used for conveying materials to the carbonization furnace 200, hot air conveyed by the material hot blast stove 300 is heated, the second valve 550 is opened, and the carbonization furnace 200 conveys cracking gas to the hot blast stove 300. It should be appreciated that when the pressure drop value is not satisfactory, a leak detection failure is indicated, and a shutdown is required to check for a leak in the furnace. The pressure holding time for the airtightness detection of the carbonization furnace 200 may be 2 minutes.

In addition, in the cracking process, when the pressure of the pressure information acquired by the pressure transmitter 630 is lower than c, at this time, the control system 001 can control the corresponding alarm to perform the alarm of purging the oxygen-insulating medium safety source with low pressure. When the pressure information acquired by the pressure transmitter 630 is lower than d, the surface anaerobic medium safety source is lost, and the control system 001 controls the cracking system to stop working. Where c may be 1bar and d may be 10Kpa.

Meanwhile, when the furnace is about to be stopped or flameout occurs in an accident, the first valve 540 is directly closed, the third valve 560 is opened, the second valve 550 is opened, and inert gas is introduced into the combustion chamber for residual gas purging for a set time, for example, residual gas purging for 5 minutes can be performed, which has two purposes, the first purpose is oxygen insulation safety, and the other purpose is rapid cooling and cooling of the carbonization furnace 200. After the residual pyrolysis gas is purged, the second valve 550 and the third valve 560 are closed, and the material can be completely discharged after the carbonization furnace 200 is cooled to normal temperature.

The carbon monoxide analyzer 640 is disposed between the preheating channel and the dust removing mechanism 410, and specifically, disposed on the fourth pipe 450, and is configured to detect the concentration of carbon monoxide in the gas entering the dust removing mechanism 410. When the concentration content of carbon monoxide in the hot air obtained by the carbon monoxide analyzer 640 exceeds e, dust collection and explosion are easy to occur at a dust collection mechanism in the operation process of the cracking system, so that the control system 001 can regulate and control the combustion condition of fuel in the hot blast stove 300 through the concentration of the carbon monoxide obtained by the carbon monoxide analyzer 640, avoid peroxy combustion and improve safety. Wherein e may be 0.4%.

In this embodiment, optionally, a flame indicator lamp 310 in communication connection with the control system 001 is disposed on the hot blast stove 300, and when the flame indicator lamp 310 is not shown, it indicates that the operation of the hot blast stove 300 is abnormal, and at this time, the control system 001 controls the cracking system to stop operating. In addition, the hot blast stove 300 is also connected with a secondary fan 320, and the secondary fan 320 can supplement oxygen and input cold air for the hot blast stove 300.

In summary, the sludge carbonization pyrolysis system provided by this embodiment has a set of complete safety interlock 500 built into the pyrolysis system, and plays a timely and effective safety protection role in the pyrolysis production process, that is, aiming at a plurality of possible risk points of the sludge pyrolysis part related to explosion, an explosion-proof device and a control strategy related thereto are designed to form a complete explosion-proof system, and the system performs early warning and advanced control before the risk points of possible explosion, and stops emergently under the emergency condition, so as to eliminate safety accidents in germination.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sludge carbonization pyrolysis system is characterized by comprising:

the safety interlocking device comprises a material meter, a first valve, a second valve, a third valve and an oxygen meter, wherein the material meter is connected with the carbonization furnace and used for detecting the ash level height of the ash residue outlet; the first valve is arranged at the air inlet and used for controlling the on-off of the air inlet; the second valve is arranged on the first pipeline and used for controlling the on-off of the first pipeline; the third valve is arranged at the air outlet and used for controlling the on-off of the air outlet; the oxygen measuring instrument is connected with the carbonization furnace and is used for detecting the oxygen content in the carbonization furnace.

2. The sludge carbonization pyrolysis system of claim 1, wherein:

the quantity of the material meters is multiple, and the multiple material meters are arranged at intervals in the height direction of the ash residue outlet.

3. The sludge carbonization pyrolysis system of claim 1, wherein:

the safety interlock device further comprises a vacuum pressure switch and a high voltage switch both disposed on the first conduit.

4. The sludge carbonization pyrolysis system of claim 1, wherein:

the safety interlock device further comprises a temperature sensor, and the temperature sensor is connected with the carbonization furnace and used for detecting the temperature in the carbonization furnace.

5. The sludge carbonization pyrolysis system of claim 1, wherein:

the safety interlocking device further comprises a differential pressure transmitter, a positive pressure port of the differential pressure transmitter is communicated with the cracking cavity, and a negative pressure port of the differential pressure transmitter is communicated with an inner cavity of the hot blast stove.

6. The sludge carbonization pyrolysis system of claim 1, wherein:

safety interlock still includes pressure transmitter, be provided with on the carbide furnace with the gas transmission pipeline of air inlet intercommunication, pressure transmitter and first valve all locates on the gas transmission pipeline.

7. The sludge carbonization pyrolysis system of claim 1, wherein:

the material conveying device comprises a drying machine and a spiral material conveying machine, the drying machine is connected with the spiral material conveying machine, and a third valve is arranged between the drying machine and the spiral material conveying machine; and the discharge hole of the spiral material conveyer is communicated with the cracking cavity.

8. The sludge carbonization pyrolysis system of claim 7, wherein:

the desiccator is provided with preheats the passageway, preheat the passageway through the third pipeline with the heating chamber intercommunication.

9. The sludge carbonization pyrolysis system of claim 8, wherein:

the discharging device comprises a dust removal mechanism, a desulfurization and denitrification mechanism, an air blower and a combustion tower which are sequentially communicated, and the dust removal mechanism is communicated with the preheating channel.

10. The sludge carbonization pyrolysis system of claim 9, wherein:

the safety interlock device further comprises a carbon monoxide analyzer, wherein the carbon monoxide analyzer is arranged between the preheating channel and the dust removal mechanism and used for detecting the concentration of carbon monoxide in gas entering the dust removal mechanism.