CN219756375U - L-shaped hot blast stove for gasifying fuel gas by pyrolysis of sludge - Google Patents
L-shaped hot blast stove for gasifying fuel gas by pyrolysis of sludge Download PDFInfo
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- CN219756375U CN219756375U CN202321280925.7U CN202321280925U CN219756375U CN 219756375 U CN219756375 U CN 219756375U CN 202321280925 U CN202321280925 U CN 202321280925U CN 219756375 U CN219756375 U CN 219756375U
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Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
The utility model relates to a sludge pyrolysis gasification fuel gas L-shaped hot blast stove, wherein the whole stove body is made of metal materials, reinforcing ribs are transversely and longitudinally arranged outside the stove body in a staggered manner, flue gas outlets are arranged at the right end of the horizontal end of the stove body, stove walls, stove tops, stove bottoms and pipelines of the flue gas outlets are all provided with stove lining structures, the effect of fire prevention, heat insulation and heat preservation on the stove body is met, two struts arranged at the left end of the horizontal section of the stove body are arranged on the stove lining structures of the stove bottoms, and a checker brick wall is arranged at the position of the horizontal end of the stove body, which is close to the flue gas outlets.
Description
Technical Field
The utility model belongs to the technical field of sludge treatment equipment, and particularly relates to a sludge pyrolysis gasification fuel gas L-shaped hot blast stove.
Background
The sludge is composed of solid precipitate substances generated in the water and sewage treatment process, contains a large amount of organic matters, heavy metals, pathogenic bacteria and the like, and can cause serious pollution to the environment without any treatment. The sludge is usually dehydrated, and enters a sludge pyrolysis gasification system for treatment after dehydration is completed, so that combustible gas is generated, and the process steps are as follows: 1. dehydrating the sludge; 2. granulating, airing and transforming the dehydrated sludge, delivering the dried sludge particles into an integrated airtight pyrolysis gasification device, gradually drying, carbonization, gasification and combustion processes of the sludge particles from top to bottom in the integrated airtight pyrolysis gasification device, finally discharging and collecting gas generated in the device through a pipeline, and transforming organic residues and inorganic matters into harmless slag after high-temperature combustion and discharging the harmless slag through a slag discharging port, wherein the reduction, harmless and energy of sludge treatment are realized; effectively avoiding the condition of generating dioxin; the running cost is low, and the automatic running and management can save a great deal of labor cost.
The hot blast stove system is to burn the combustible gas generated by the sludge pyrolysis gasification system in the hot blast stove steadily and safely, a single hot blast stove is provided with 1 set of natural gas combustion unit and 1 set of sludge pyrolysis gas combustion unit, and the high-temperature flue gas generated by the hot blast stove is introduced into the boiler through a flue to carry out subsequent heat utilization work, namely the whole sludge treatment flow.
In the hot blast stove system, under normal working conditions (the ambient temperature is 20 ℃ and the temperature in the stove is 1100 ℃), the surface temperature of the equipment after operation is not more than 35 ℃ (or the surface temperature is not more than 60 ℃) of the room temperature. The utility model provides a hot-blast furnace among the prior art generally adopts barrel type's hot-blast furnace structure, whole hot-blast furnace is a vertical barrel structure, the outlet flue sets up the lower extreme at the hot-blast furnace, will lead to like this mud pyrolysis gas can not carry out abundant burning in entering the hot-blast furnace and just directly discharge from the flue export, the purpose that can not reach full burning and make full use of the energy, the flame of burning has the danger that overflows from the outlet flue, cause certain potential safety hazard, simultaneously because pyrolysis gasification's gas has certain impurity, so at the in-process of burning, very easily block up the outlet flue, and at the in-process of discharging fume, the flue gas is concentrated, thereby cause the big problem of body local difference in temperature at subsequent pipeline transportation in-process, therefore, we need a mud pyrolysis gasification gas "L" formula hot-blast furnace to be used for solving above-mentioned problem.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide an L-shaped hot blast stove for pyrolysis gasification of sludge gas, which is used for solving the problems in the background art.
The technical aim of the utility model is realized by the following technical scheme:
the utility model provides a mud pyrolysis gasification gas "L" type hot-blast furnace, includes the furnace body, the furnace body upper end is connected with burning air supply device, mud pyrolysis gasification gas burner, natural gas preheating device respectively, its characterized in that, the furnace body is whole to be "L" setting, the furnace body is made for metal material, the horizontal end of furnace body is outer along transversely and vertically crisscross installing the strengthening rib, the right-hand member at the horizontal end of furnace body is provided with the flue gas export, all be provided with furnace wall structure on furnace wall, furnace roof, stove bottom and the pipeline of flue gas export, satisfy and play thermal-insulated heat retaining effect of fire prevention to the furnace body, the manhole has been seted up to the furnace body side wall, be provided with the pillar of twice in furnace body horizontal segment left end on the furnace wall structure of furnace bottom, two sets of stand longitudinal interval set up and be provided with the expansion joint between the furnace wall structure of top and furnace roof, furnace body horizontal end is provided with the checker brick wall near the position department of flue gas export.
Preferably, the metal material of the furnace body is made of carbon steel material, and the thickness is 6mm.
Preferably, the reinforcing ribs are I-steel, and are made of carbon steel materials.
Preferably, the furnace lining structure of the furnace wall is a three-layer lining structure, a calcium silicate plate layer, a light pouring material layer and a refractory pouring material layer are sequentially arranged from the inner side wall of the furnace body to the inside of the furnace, the thicknesses of the three-layer lining structure are respectively 200mm, 166mm and 150mm, and the three-layer lining structure is anchored between the furnace body and the reinforcing ribs through metal anchoring nails.
Preferably, the lining structure of the furnace roof is a module made of aluminum zirconium silicate cotton, the thickness of the module is 400mm, the aluminum zirconium silicate cotton is arranged at the lower end in the furnace roof and is connected with the furnace body and the reinforcing ribs in an anchoring manner through metal anchoring nails, and the sludge pyrolysis gasification gas combustion device and the natural gas preheating device are arranged on the reinforcing ribs of the furnace roof through bolt structures.
Preferably, the furnace lining structure of the furnace bottom is a four-layer lining structure, and a calcium silicate plate layer, a light pouring material layer, a clay refractory brick layer and a high-alumina refractory brick layer are sequentially arranged from the furnace bottom upwards, wherein the thicknesses of the calcium silicate plate layer, the light pouring material layer, the clay refractory brick layer and the high-alumina refractory brick layer are respectively 200mm, 232mm and 116mm, and two groups of upright posts are connected above the light pouring material layer;
the bottom of the upright post is arranged at the upper end of the light pouring material layer by adopting a foot placement masonry structure.
Preferably, the pipeline of the flue gas outlet is of a heat-insulating refractory multilayer lining structure, wherein a ceramic fiber cotton layer and a refractory castable layer are arranged from the pipe wall to the center, the thicknesses of the ceramic fiber cotton layer and the refractory castable layer are respectively 200mm and 150mm, and the ceramic fiber cotton layer and the refractory castable layer are connected with the pipeline in an anchoring manner through metal anchoring nails.
Preferably, the checker brick wall is formed by stacking mullite standard bricks.
Preferably, ceramic fibers are placed at the location of the expansion joints to buffer expansion stresses.
Preferably, the air inducing device is arranged in the horizontal end of the furnace body, the air inducing device comprises a mounting frame which is arranged in the horizontal end of the furnace body and arranged on the right side of the checker brick wall, a circumferentially closed bypass pipeline is arranged in the mounting frame along the inner frame shape direction of the mounting frame, an air overflow notch is formed in the bypass pipeline along the bypass direction of the mounting frame, the air overflow notch is formed by mutually interlacing the opening ends of the bypass pipeline, the direction of the air overflow notch is arranged towards the direction of the smoke outlet, a base which extends out of the furnace body is arranged at the upper end of the mounting frame, a turbine and a motor are arranged in the base, the base is communicated with the bypass pipeline through a connecting pipe, the motor is electrified, and the bypass pipeline and the mounting frame are made of high-temperature resistant materials.
The utility model has the beneficial effects that: the utility model provides a fire-resistant hot blast stove, the furnace body is wholly for "L" type setting, the furnace body is made for metal material, the reinforcing rib is transversely and vertically crisscross to be installed in the furnace body outside, the right-hand member of horizontal end of furnace body is provided with the flue gas export, the furnace wall, the furnace roof, the stove bottom and all be provided with the furnace lining structure on the pipeline of flue gas export, the effect of playing fire prevention thermal insulation heat preservation to the furnace body is satisfied, the manhole is seted up to the furnace body side wall, be provided with the pillar of two places in furnace body horizontal segment left end on the furnace lining structure of stove bottom, two sets of stand longitudinal interval settings and be provided with the expansion joint between the furnace lining structure of top and furnace roof, furnace body horizontal end is provided with the checker brick wall near the position of flue gas export, the hot blast stove design of the utility model adopts refractory castable, light castable, calcium silicate board and stove shell steel sheet etc. constitute, wherein the combustion chamber is equipped with keeps off the fire wall, ensure that flame is full, after the fuel fully burns, insert exhaust-heat boiler in combustion chamber rear flue, the energy utilization rate is improved, avoid the danger that the open fire overflows from the flue, the safety vent, still have the efficiency of dust proof jam simultaneously, the checker brick wall plays ash and makes and even distribution keep off in the position, make flue gas evenly spread in the flue position, and has a certain practical effect.
Drawings
Fig. 1 is a cross-sectional view of a front view of the present utility model.
FIG. 2 is a cross-sectional view of A-A of FIG. 1 in accordance with the present utility model.
Fig. 3 is a cross-sectional view of a side view of the present utility model.
Fig. 4 is a cross-sectional view of a portion of the structure of a side view of the present utility model.
Fig. 5 is a perspective view of the air induction device according to the present utility model.
Fig. 6 is a perspective view of a bypass duct in the wind guiding apparatus of the present utility model.
Fig. 7 is a cross-sectional view of the bypass duct of the wind deflector of the present utility model.
In the figure, 1, a furnace body; 2. a sludge pyrolysis gasification gas combustion device; 3. a natural gas preheating device; 4. reinforcing ribs; 5. a flue gas outlet; 6. a manhole; 7. a support post; 8. an expansion ring; 9. a checker brick wall; 10. a calcium silicate board layer; 11. a light pouring material layer; 12. a refractory casting material layer; 13. zirconium aluminum silicate cotton; 14. metal anchoring nails; 15. a clay refractory brick layer; 16. a high alumina refractory brick layer; 17. tao Qianmian layers; 18. ceramic fibers; 19. an induced draft device; 20. a mounting frame; 21. bypassing the pipeline; 22. a wind overflow notch; 23. a base; 24. a turbine; 25. a motor.
Detailed Description
The following is a further detailed description of embodiments of the present utility model with reference to figures 1-7.
The first embodiment of the utility model discloses a sludge pyrolysis gasification fuel gas L-shaped hot blast stove, which comprises a stove body 1, wherein the upper end of the stove body 1 is respectively connected with a combustion air supply device, a sludge pyrolysis gasification fuel gas combustion device 2 and a natural gas preheating device 3, the sludge pyrolysis gasification fuel gas combustion device 2 mainly feeds pyrolysis gasification fuel gas communication air into the hot blast stove for combustion treatment, and the natural gas preheating device 3 heats the temperature in the stove body 1 to 700 ℃ after being started and continuously maintains the temperature above 700 ℃;
the furnace body 1 is wholly for setting "L", furnace body 1 is made for metal material, the metal material of here is made for carbon steel material, thickness is 6mm, furnace body 1 structure is only around and the top is provided with, the bottom does not set up, the outside of furnace body 1 is along transversely and vertically crisscross installing reinforcing rib 4, reinforcing rib 4 is the I-steel, the material is made for carbon steel material, the model of I-steel is 16I-steel, the right-hand member of the horizontal end of furnace body 1 is provided with flue gas export 5, make the flue gas after the burning carry from the horizontal end, then enter into the boiler from flue gas export 5, in-process at the transport, realize equipartition and impurity precipitation's effect, all be provided with the furnace wall, the furnace roof, the furnace bottom and flue gas export 5 on the pipeline, satisfy the effect to furnace body 1 and play fire prevention thermal-insulated heat preservation, concrete furnace wall furnace lining structure: the furnace wall has a furnace lining structure of three layers, namely a calcium silicate plate layer 10, a light pouring material layer 11 and a refractory pouring material layer 12 are sequentially arranged from the inner side wall of the furnace body 1 towards the inside of the furnace, the thicknesses of the three layers are respectively 200mm, 166mm and 150mm, the total thickness of the three layers is 516mm, the three layers of the lining structure are anchored between the furnace body 1 and the reinforcing ribs 4 through metal anchoring nails 14, and segmented metal anchoring parts are adopted for anchoring. The anchoring nail is made of S310 with the diameter of 12mm;
the lining structure of the furnace roof is a module made of aluminum zirconium silicate cotton 13, the thickness of the lining structure is 400mm, the aluminum zirconium silicate cotton 13 is arranged at the lower end in the furnace roof, the lining structure is connected with the furnace body 1 and the reinforcing ribs 4 in an anchoring manner through metal anchoring nails 14, the size of the module is 300 x 400mm, the anchoring nails are made of S310, the sludge pyrolysis gasification gas combustion device 2 and the natural gas preheating device 3 are arranged on the reinforcing ribs 4 of the furnace roof through bolt structures, and then the sludge pyrolysis gasification gas combustion device 2 and the natural gas preheating device 3 convey corresponding gases into the hot blast furnace;
the furnace lining structure of the furnace bottom is a four-layer lining structure, and comprises a calcium silicate plate layer 10, a light pouring material layer 11, a clay refractory brick layer 15 and a high-alumina refractory brick layer 16 which are sequentially arranged from the furnace bottom upwards, wherein the thicknesses of the calcium silicate plate layer 10, the light pouring material layer 11, the clay refractory brick layer 15 and the high-alumina refractory brick layer 16 are respectively 200mm, 232mm and 116mm, and the total thickness of the clay refractory brick layer is 780 mm;
the bottom of the upright post is arranged at the upper end of the light pouring material layer 11 by adopting a foot placement masonry structure, so that the overall stability is ensured, the section size of the upright post 7 is at least 460 mm or less than 460 mm, the structure of the upright post and the furnace wall above play a role of a certain spark wall, the flame fullness is ensured, and a flue at the rear part of the combustion chamber is connected with a waste heat boiler after the fuel is fully combusted;
the pipeline of the flue gas outlet 5 is of a heat-insulating refractory multilayer lining structure, wherein a Tao Qianmian layer 17 and a refractory castable layer are arranged from the pipe wall to the center, the thicknesses of the heat-insulating refractory multilayer lining structure are respectively 200mm and 150mm, the total thickness of the heat-insulating refractory multilayer lining structure is 350mm, the heat-insulating refractory multilayer lining structure is connected with the pipeline through a metal anchoring nail 14 in an anchoring manner, an expansion joint is arranged at the joint of the flue gas outlet and a waste heat boiler, and Tao Qianmian is filled in;
manhole 6 has been seted up to furnace body 1 side wall, the person of facilitating the use observes inside, be provided with twice pillar 7 of arranging furnace body 1 horizontal segment left end on the furnace wall structure, two sets of vertical interval setting and be provided with the expansion joint between the furnace wall structure of top and furnace roof, ceramic fiber 18 has been placed in the position department of expansion joint in order to cushion expansion stress, the stand of here is in the in-process of setting, play certain fire-blocking effect, furnace body 1 horizontal end is provided with the checker brick wall 9 near the position department of flue gas export 5, the checker brick wall 9 adopts mullite standard brick to pile up and forms, the checker forms hollow cavity structure for the smog of production, in the in-process through horizontal furnace body 1, so that ash blocking and make flue gas distribution even.
The stove is further understood by the following application of the stove in the whole stove device and the technical requirements:
1. general requirements of complete equipment of hot blast stove
The hot blast stove system is to burn the combustible gas produced by the sludge pyrolysis gasification system in the hot blast stove steadily and safely, and the hot blast stove system mainly comprises a combustion air supply device, a sludge pyrolysis gasification gas combustion device, a natural gas preheating device, an instrument detection device and the like. The hot blast stove is designed to be composed of refractory castable, light castable, calcium silicate plates, stove shell steel plates and the like; the combustion chamber is provided with a spark wall to ensure the flame fullness, and the fuel is fully combusted and then is connected into the waste heat boiler at the rear flue of the combustion chamber. Under normal working conditions (the ambient temperature is 20 ℃ and the temperature in the furnace is 1100 ℃), the surface temperature of the equipment after operation is not more than 35 ℃ of the room temperature (or the surface temperature is not more than 60 ℃).
The equipment is matched with a hot blast stove on a demand side, is of a split type structure, and is provided with a single hot blast stove1 set natural gas burner Group and 1 set of sludge pyrolysis gas combustion unit. Under the conditions of heat value, pressure, composition, temperature and the like of the fuel gas provided by a demand party, the equipment can pass through a PLC programThe control realizes safe and stable combustion, does not lose fire, does not temper, has a certain regulation ratio (1:4), and realizes low nitrogen emission, and the specific conditions are as follows:
the first step, the natural gas reducing valve is adjusted to 6-8KPa to ignite the natural gas combustion unit, and the gas flow is kept between 100 and 150Nm 3 And/h, raising the temperature of the hearth to 700 ℃ and continuously ensuring the temperature to be above 700 ℃.
Ignition control and protection functions of the natural gas combustion unit accord with GB/T36699-2018: 1. and (3) detecting and protecting internal leakage of the natural gas valve: before starting, the natural gas valve performs internal leakage self-detection through a program, finds leakage, gives an alarm and stops the subsequent program; this function is only used for clean air sources;
2. automatic purging, meeting logic conditions of starting the gas burner, and enabling ventilation quantity to be more than three times of the volume of the hearth; 3. automatic ignition: the ignition transformer sends out pulse sparks, the ignition cut-off valve is automatically opened to form an ignition torch, the flame monitoring system detects that open flame exists, and then the main gas cut-off valve can be automatically opened;
4. the automatic flameout protection device has the automatic flameout protection function in emergency or power failure: the unit suddenly extinguishes (suddenly does not have the flameout caused by an air source, power failure and the like) in the normal operation process, and at the moment, the high-sensitivity flame monitor can give an alarm signal, and the main gas valve of the unit is completely cut off within 3 seconds;
5. natural gas pressure low or high protection: the unit can give an alarm when the natural gas supply pressure is lower than the lower limit value or exceeds the upper limit value, and simultaneously cut off the gas;
6. the natural gas flow and the combustion air flow can be remotely operated in proportion through the regulating valve;
7. the hot blast stove has an interlocking protection function with the operation of the hot blast stove, the overtemperature of the hot blast stove gives an alarm, the induced draft fan of the hot blast stove stops giving an alarm, and when the alarm signals appear, the gas is cut off, and the unit stops;
8. the natural gas pressure regulating valve is a self-operated pressure regulating valve, and the DN is 50 caliber;
9. the natural gas cut-off valve is of an explosion-proof pneumatic cut-off ball, and has a DN50 caliber;
10. the natural gas regulating valve is an explosion-proof pneumatic single-seat regulating valve with DN50 caliber;
11. the combustion-supporting fan is a centrifugal fan, and the motor is an explosion-proof motor.
And secondly, igniting natural gas long-term open fire equipped on the sludge pyrolysis gas combustion head, and feeding the sludge pyrolysis gas generated by the gasification furnace into the furnace under the condition that the temperature of the hearth of the hot blast stove reaches 700 ℃, so that the sludge pyrolysis gas can be ignited to burn under the natural gas even if the sludge pyrolysis gas does not reach the combustion condition.
The function introduction of the sludge pyrolysis gas combustion unit:
1. partial premixed diffusion type combustion, wherein combustion air and low-pressure sludge pyrolysis gas have an intersection angle or rotational flow, so that mutual disturbance is increased, and the combustion air and the air are better mixed;
2. the gas spray pipe is provided with a flame stabilizer, so that part of the burnt high-temperature combustion products generate backflow motion (namely, opposite to the flowing direction) to be used as a continuous ignition source with automatic compensation capability, and fresh and unburned combustible mixture is not broken;
3. an industrial ultraviolet flame detection system is adopted, double sets of flame detection systems are arranged, the presence or absence of flame signals is reasonably monitored at different positions, and the ion flame detection systems matched with natural gas open flame are mutually in linkage protection;
4. the slow-opening and fast-closing pneumatic cut-off valve is adopted, the opening time is controlled by controlling the flow of compressed air, so that the slow-opening is achieved, the energy at the moment of ignition is reduced, and the severe fluctuation of the pressure of a hearth is avoided;
5. the pneumatic cut-off valve is provided with a valve positioner, so that the pneumatic cut-off valve has an adjusting function, and the opening of the valve is remotely adjusted under the condition that the yield of the sludge pyrolysis gas fluctuates, so that the aim of randomly adjusting the thermal force of the combustion unit is fulfilled;
6. the method comprises the steps of detecting and protecting the pressure of the pyrolysis gas of the sludge, detecting and protecting the pressure of combustion-supporting air, overtemperature of a hearth, induced air and shutdown and the like, and interlocking with a pyrolysis gas cut-off valve, and cutting off fuel gas at the first time in an alarm state to protect the safety of downstream equipment;
7. the natural gas long open fire can be selected to be interlocked with the sludge pyrolysis gas cut-off valve, the long open fire is lost under the condition that the temperature is not up to 700 ℃, the sludge pyrolysis gas cut-off valve can be closed, the natural gas long open fire can also be selected to be closed independently, and an operator can judge whether to close the long open fire under the condition that the temperature of a hearth reaches and is kept above 700 ℃;
8. the sludge gas cut-off valve is of an explosion-proof pneumatic cut-off ball, has DN250 caliber, is provided with a positioner and has an adjusting function;
9. the combustion-supporting fan is a centrifugal fan, the motor is an explosion-proof motor, and the fan is contract-demand. Thirdly, realizing various logic conditions in the running process:
1. the induced draft fan is not started, and all the combustion units cannot be put into operation;
2. the natural gas combustion system can be put into operation only when the natural gas is not overpressured or undervoltage;
3. the natural gas combustion-supporting air is not under-pressure, and the natural gas combustion system can be put into operation;
4. the natural gas combustion unit does not run in an ignition mode, and the pyrolysis gas combustion unit cannot be directly put into operation;
5. the natural gas is not ignited by the open flame, and the pyrolysis gas combustion unit cannot be directly put into operation;
6. the sludge pyrolysis gas is not under-pressure, and the pyrolysis gas burner unit can be put into operation;
7. the combustion air of the sludge pyrolysis gas is not under-pressure, and the pyrolysis gas combustion system can be put into operation;
8. after the temperature of the hearth reaches 700 ℃, the natural gas combustion unit can be closed, but natural gas continues to run on open flame;
9. the natural gas pilot fire can only be selectively judged by an operator to be closed or not, and the closing condition is as follows: the temperature of the hearth reaches and is kept at 700 ℃;
10. after the sludge pyrolysis gas combustion unit is put into operation, the ultraviolet flame detection system is interlocked with the pyrolysis gas cut-off valve to keep on, if flame signals are lost, the pyrolysis gas cut-off valve is closed and locked, the problem is cleared, and after the flame signals are reset, the ultraviolet flame detection system can be opened again;
11. even if the temperature of the hearth is 700 ℃, the pyrolysis gas cut-off valve is started through a natural gas long-open flame ignition program, and the natural gas long-open flame ignition is successful and then can be started;
when the temperature of the hearth of the hot blast stove is lower than 700 ℃, the natural gas combustion unit gives an alarm, the combustion unit automatically executes an ignition program, starts to operate, and complements the temperature of the hearth of the hot blast stove (in this case, the operation failure of the gasification stove is considered, the components of the pyrolysis gas are unstable, the heat value is reduced, and in order to ensure the safety of downstream equipment, the natural gas combustion unit is started to burn unstable pyrolysis gas).
2. Technical requirements of hot blast stove
2.1 stove body parameters
| Project name | Single sheet | Numerical value | Remarks | |
| 1. | Specification and model | HT-8500 type | ||
| 2. | Combustion gas quantity | N | 3000-4000 | |
| 3. | Smoke volume | N | 8000-9000 | |
| 4. | Furnace volume | M | 30 | |
| 5. | Quantity of | Bench | 4 | |
| 6. | Furnace body material | m | ≥6 | Carbon steel |
| 7. | Design temperature | ℃ | 1500 | |
| 8. | Operating temperature | ℃ | 950-1100 | |
| 9. | Fume retention | S | ≥2.5 | |
| 10. | Operating pressure | P | 0～-100 | |
| 11. | High alumina refractory | Batch of materials | LZ-65 | |
| 12. | Clay fire resistance | Batch of materials | High temperature resistant 1100 DEG C | GB/T3 |
| 13 | High aluminum casting | Batch of materials | Temperature resistant 1470 DEG C | |
| 14. | Calcium silicate board | Batch of materials | Asbestos-free micropores | GB/T1 |
| 15. | Furnace top zirconium silicon | Batch of materials | GW-489 | GB/T3 |
| 16. | Light casting | Batch of materials | Q-0.8 |
2.2 furnace lining parameters
1. The furnace wall adopts a three-layer lining structure of calcium silicate plates, light castable and refractory castable, and the thicknesses are respectively 200mm, 166mm and 150mm, and the total thickness is 516mm. And anchoring is performed by adopting a sectional metal anchoring piece. The anchor nail is made of S310 and has a diameter of 12mm.
2. The furnace top adopts a module made of zirconium aluminum silicate cotton as a furnace lining with the thickness of 400mm. The module size was 300 x 400mm. Anchor nail material S310.
3. The furnace bottom adopts a multi-layer lining structure of calcium silicate plates, light castable, clay refractory bricks and high-alumina refractory bricks, and the thickness is 100/200mm+332/232mm+232mm+116mm respectively, and the total thickness is 780mm. The bottom structure of the pillar and the wall takes the bearing load into consideration.
4. Two struts are arranged at the position of the L-shaped furnace roof, and an expansion joint is arranged between the two struts and the furnace lining of the furnace roof to place ceramic fibers so as to buffer expansion stress. The support should be laid from the bottom of the furnace to ensure stability. The cross-sectional dimension of the pillars is at least 460 mm by 460 mm.
5. The lattice bricks are arranged near the outlet of the hearth so as to block ash and uniformly distribute flue gas. The lattice brick adopts mullite standard brick. The checker brick should take stability into account.
6. The flue gas outlet and the connecting pipeline of the waste heat boiler adopt a heat-insulating refractory multilayer lining structure, the heat-insulating refractory multilayer lining structure is recommended to be Tao Qianmian + refractory castable, the thickness is 200mm+150mm, the total thickness is 350mm, and the metal anchoring nails are used for anchoring. An expansion joint is arranged at the corrugated pipe of the connecting pipeline, and Tao Qianmian is filled in.
7. The refractory bricks are wet laid by adopting refractory clay of corresponding model.
8. The properties of the main lining material are shown in the following table. The performances of the rest materials meet the requirements of corresponding national or industry standards.
Mullite lattice brick is at least MU60, the properties are given in the following table:
2.3 day gas combustion unit
2.4 sludge pyrolysis gas combustion unit
3. System operating condition parameters
A. Natural gas
1. Gas type: natural gas;
2. low calorific value of fuel gas: 8000kcal/Nm 3 ；
3. Gas design flow: 150Nm 3 /h；
4. Gas pressure: 80-90KPa, and the front valve group of the burner is self-supporting and pressure-regulating;
5. gas temperature: normal temperature.
B. Sludge pyrolysis gas
1. Gas type: sludge pyrolysis gas;
2. low calorific value of fuel gas: 500-1100kcal/Nm 3 (running at 910kcal/Nm for a longer period of time)
3 Status);
3. gas design flow: 4000Nm per unit 3 /h；
4. Gas pressure: 1-2KPa;
5. gas temperature: 90-150 ℃.
6. The main composition table of the sludge pyrolysis gas is as follows:
| sequence of steps | Name of the name | Specification vol% | Remarks |
| CO | |||
| H2 | |||
| CO2 | |||
| CH4 | |||
| H2S | |||
| N2+Ar | |||
| NH3 | |||
| O2 | |||
| H2O | |||
| CmHn | |||
| Tar (gas and liquid) | |||
| Gas calorific value (Dry basis) | kcal/Nm3 |
C. Sludge pyrolysis gas combustion air
The parameter requirements of the sludge pyrolysis gas combustion-supporting fan are as follows: the pressure is not less than 4KPa, the air quantity is not less than 6000Nm3/h, and the sludge pyrolysis gas is supplied to a sludge pyrolysis gas burner.
D. Compressed air
1. Compressed air pressure: more than or equal to 0.4MPa;
2. compressed air flow rate: 0.17m 3 /min (purified compressed gas for each pneumatic valve).
E. Power supply
380V;7.5KW (small fan of ignition gun).
4. Technical index requirement and furnace curve parameter of hot blast stove construction
4.1 the construction environment temperature should be 5-35 ℃. When the condition is not satisfied, corresponding heating or cooling measures should be taken. Before the construction of the light castable, waterproof measures such as brushing a waterproof agent on the surface of the calcium silicate plate, paving a plastic film and the like are adopted to prevent the calcium silicate plate from being damaged by water absorption and cause the rapid dehydration and drying of the light castable.
4.2 the castable should be stirred by clean drinking water, and the fire water, river water and the like which do not meet the requirements cannot be used.
4.3A forced stirrer was used for stirring. The water addition amount is strictly controlled. The stirred material should be shaped in as short a time as possible, typically not exceeding 40 minutes.
4.4 the furnace wall is built from the upper surface of the furnace bottom concrete and is separated from the furnace bottom refractory material. And the expansion joints are reasonably arranged. The expansion joint of the refractory layer of the high-alumina casting material is reserved in a mode of embedding plywood with the thickness of 3-5 mm. And (5) carrying out refractory brick processing and furnace lining construction strictly according to standard specification requirements, and carrying out staggered joint on each layer.
And 4.5, the anchor assembly is accurate in installation position and firm in installation.
4.6 the furnace top ceramic fiber module is tightly installed and the compensation blanket is reasonably arranged.
4.7 the checker bricks are built after the bottom of the furnace is finished. The stability is ensured.
And 4.8, after the furnace lining is integrally finished, naturally ventilating and placing for three days, and then baking the furnace. The hot air oven is carried out by using fuel gas or fuel oil as fuel, and flames do not directly contact the surface of the oven lining. The temperature should be raised and maintained slowly according to the baking curve strictly.
4.9 oven regimen reference is made to the following table:
in the in-process that uses, after mud pyrolysis gasification burner lets in the hot-blast furnace with combustible gas, burn in furnace body 1, the ignition of burning and the top of the vertical section of furnace body 1 are concentrated in the combustion zone, wherein two sets of stands play the purpose when the fire, the smoke and dust after the burning moves along with the flue outlet direction of furnace body 1 horizontal end right-hand member, in the in-process that moves, play the ash blocking through the dispersion effect of checker brick wall 9 body, make flue gas distribution even, make it carry out the equipartition with smog and disperse to the pipeline in the position of flue outlet, thereby ensure at the in-process that high temperature flue carried, the problem of smog of every position department is little, the combustion chamber of this embodiment is equipped with the flame-blocking flower wall, ensure flame fullness, the flue access waste heat boiler in combustion chamber rear portion after the fuel fully burns, the energy utilization rate is improved, avoid the danger that the naked light overflowed from the flue mouth, the potential safety hazard is reduced, still have the efficiency of smoke and dust prevention jam simultaneously, checker wall 9 plays ash blocking and makes the flue gas distribution even, make it can carry out the equipartition in the pipeline, thereby guarantee that the flue gas is strong in the position of delivering, practicality.
In the second embodiment, on the basis of the first embodiment, an air inducing device 19 is installed in the horizontal end of the furnace body 1, the air inducing device 19 comprises an installation frame 20 installed in the horizontal end of the furnace body 1 and arranged on the right side of the checker brick wall 9, the installation frame 20 has an installation effect, a circumferentially closed bypass pipeline 21 is installed in the installation frame 20 along the inner frame shape direction of the installation frame 20, an air overflow notch 22 is formed in the bypass pipeline 21 along the bypass direction, the air overflow notch 22 is formed by mutually staggered opening ends of the bypass pipeline 21, the direction of the air overflow notch 22 is arranged towards the direction of a smoke outlet, a base 23 extending out of the furnace body 1 is installed at the upper end of the installation frame 20, a turbine 24 and a motor 25 are installed in the base 23, the base 23 is communicated with the bypass pipeline 21 through a connecting pipe, the motor 25 is electrified, the bypass pipeline 21 and the installation frame 20 are made of high-temperature resistant materials, it is obvious that the bypass duct 21 conforms to aerodynamic design, one side is wider and the other side is narrower, the inner side is in straight line transition, the outer side is in smooth transition, wind energy in the duct is ensured to flow out smoothly through the wind overflow notch 22, thereby forming a wind ring, negative pressure is formed, and ventilation quantity is improved, the principle is similar to that of a bladeless fan, no blades exist, safety of the system is greatly improved, throughput of smoke is not affected when the system is not used, the throughput is improved by a plurality of times, generated smoke is quickly sucked into the center of the bypass duct 21, a base 23 is arranged at the upper end of a mounting frame 20, a turbine 24 and a motor 25 are arranged in the base 23, communication is carried out between the base 23 and the bypass duct 21 through a connecting pipe, the turbine 24 is connected with the motor 25, the motor 25 drives a worm wheel to work, and then wind is additionally conveyed into the bypass duct 214 through the turbine 24, the base 23 is provided with an air inlet hole for air intake, the running direction of the turbine 24 is to introduce air into the bypass pipeline 21, the turbine 24 and the motor 25 are both arranged outside the furnace body 1, damage to the high temperature is avoided, the mounting frame 20 and the bypass pipeline 21 are made of high temperature resistant materials, the high temperature resistant materials can be made of quartz sand, clay, magnesite, dolomite and the like, and also can be made of high temperature resistant heat insulation paint, the high temperature resistant heat insulation paint is a component inorganic paint, the temperature resistant amplitude is-80-1800 ℃, the heat conductivity is 0.03W/m.K, the heat radiation and conduction heat of high temperature objects and low temperature objects can be restrained, and 70% of heat can be kept not lost for the high temperature objects.
In the using process, after the combustible gas is introduced into the hot blast stove by the sludge pyrolysis gasification combustion device, the combustible gas is combusted in the stove body 1, the ignition and combustion area of the combustion are concentrated above the vertical section of the stove body 1, wherein two groups of upright posts play a role in igniting, the combusted smoke dust moves along with the direction of the flue outlet at the right end of the horizontal end of the stove body 1, in the moving process, the smoke dust is blocked by the dispersing effect of the checker brick wall 9, the smoke dust is uniformly distributed, and the smoke dust is uniformly distributed in the position of the flue outlet and dispersed into a pipeline, so that the problem of smoke dust at each position is not much different in the conveying process of a high-temperature flue is ensured; when the induced draft device 19 is not needed, the motor 25 is not required to be started, generated smoke can normally pass through the bypass pipeline 21 and then is discharged outwards through the smoke outlet, when a certain guiding effect is needed to be carried out on the smoke in the flue, the motor 25 is started to drive the turbine 24 to work, wind is led into the bypass pipeline 21 from the air inlet, the wind bypassing the pipeline 21 flows out from the annular air overflow notch 22, micro negative pressure is formed on the right side, then the guided smoke passes through the bypass pipeline 21 in a accelerating way, a certain induced draft effect is achieved, meanwhile, no blades are arranged, the ventilation quantity is not influenced, the combustion chamber is provided with the flame blocking wall, the flame fullness is ensured, the fuel is fully combusted and then is connected into the waste heat boiler at the rear flue of the combustion chamber, the energy utilization rate is improved, the danger that the naked flame overflows from the flue opening is avoided, the safety is reduced, meanwhile, the efficiency of preventing the smoke blocking is also achieved, the grid brick wall 9 plays the role of blocking the dust and enables the smoke to be uniformly distributed at the position of the smoke outlet, a certain induced draft effect is achieved, and meanwhile, the practicability is strong, and the device is suitable for popularization.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a mud pyrolysis gasification gas "L" type hot-blast furnace, includes furnace body (1), furnace body (1) upper end is connected with burning air supply unit, mud pyrolysis gasification gas burner (2), natural gas preheating device (3) respectively, a serial communication port, furnace body (1) are whole to be "L" type setting, furnace body (1) are made for the metal material, reinforcing rib (4) are transversely and vertically crisscross to be installed along outside furnace body (1), the right-hand member of the horizontal end of furnace body (1) is provided with flue gas outlet (5), all be provided with furnace lining structure on the pipeline of furnace wall, furnace roof, stove bottom and flue gas outlet (5), satisfy and play fire prevention thermal insulation heat retaining effect to furnace body (1), manhole (6) have been seted up to furnace body (1) side wall, furnace lining structure of furnace roof is provided with pillar (7) that two sets of stand longitudinal spacing set up and be provided with expansion joint between the furnace lining structure of top and furnace roof, furnace body (1) horizontal end is close to flue gas outlet (5) position department is provided with grid brick wall (9).
2. The sludge pyrolysis gasification fuel gas L-shaped hot blast stove according to claim 1, wherein the metal material of the stove body (1) is carbon steel material with a thickness of 6mm.
3. The sludge pyrolysis gasification fuel gas L-shaped hot blast stove according to claim 1, wherein the reinforcing ribs (4) are made of I-steel and made of carbon steel.
4. The sludge pyrolysis gasification fuel gas L-shaped hot blast stove according to claim 1, wherein the furnace lining structure of the furnace wall is a three-layer lining structure, and the three-layer lining structure is anchored with the furnace body (1) and the reinforcing ribs (4) through metal anchoring nails (14) by sequentially arranging a calcium silicate plate layer (10), a light casting material layer (11) and a refractory casting material layer (12) from the inner side wall of the furnace body (1) towards the inside of the furnace, wherein the thicknesses of the three-layer lining structure are respectively 200mm, 166mm and 150 mm.
5. The sludge pyrolysis gasification fuel gas L-shaped hot blast stove according to claim 1, wherein the lining structure of the stove top is a module made of aluminum zirconium silicate cotton (13), the thickness of the module is 400mm, the aluminum zirconium silicate cotton (13) is arranged at the lower end in the stove top and is connected with the stove body (1) and the reinforcing ribs (4) in an anchoring manner through metal anchoring nails (14), and the sludge pyrolysis gasification fuel gas combustion device (2) and the natural gas preheating device (3) are arranged on the reinforcing ribs (4) of the stove top through bolt structures.
6. The sludge pyrolysis gasification fuel gas L-shaped hot blast stove according to claim 1, wherein the furnace lining structure of the furnace bottom is a four-layer lining structure, a calcium silicate plate layer (10), a light pouring material layer (11), a clay refractory brick layer (15) and a high-alumina refractory brick layer (16) are sequentially arranged from the furnace bottom upwards, the thicknesses of the clay refractory brick layer and the high-alumina refractory brick layer are respectively 200mm, 232mm and 116mm, and two groups of upright posts are arranged and connected above the light pouring material layer (11);
the bottom of the upright post is arranged at the upper end of the light pouring material layer (11) by adopting a foot laying masonry structure.
7. The sludge pyrolysis gasification fuel gas L-shaped hot blast stove according to claim 1, wherein the pipeline of the flue gas outlet (5) is of a heat insulation refractory multilayer lining structure, wherein a Tao Qianmian layer (17) and a refractory castable layer are arranged from the pipe wall to the center, the thicknesses of the refractory castable layer and the heat insulation refractory multilayer lining structure are respectively 200mm and 150mm, and the refractory castable layer is connected with the pipeline in an anchoring manner through metal anchoring nails (14).
8. A sludge pyrolysis gasification gas "L" stove according to claim 1 wherein the checker brick wall (9) is formed by stacking mullite standard bricks.
9. A sludge pyrolysis gasification gas "L" stove according to claim 1 wherein ceramic fibres (18) are placed at the location of the expansion joints to buffer expansion stresses.
10. The sludge pyrolysis gasification fuel gas 'L' -shaped hot blast stove according to any one of claims 1 to 9, wherein the air inducing device (19) is installed in the horizontal end of the furnace body (1), the air inducing device (19) comprises a mounting frame (20) installed in the horizontal end of the furnace body (1) and arranged on the right side of the checker brick wall (9), a circumferentially closed bypass pipeline (21) is installed in the mounting frame (20) along the inner frame shape direction of the mounting frame, an air overflow notch (22) is formed in the bypass pipeline (21) along the bypass direction of the bypass pipeline, the air overflow notch (22) is formed by mutually staggered open ends of the bypass pipeline (21), the direction of the air overflow notch (22) is set towards the direction of the smoke outlet, a base (23) extending out of the furnace body (1) is installed at the upper end of the mounting frame (20), a turbine (24) and a motor (25) are installed in the base (23), the base (23) is communicated with the bypass pipeline (21) through a connecting pipe, and the bypass pipeline (21) is made of high-temperature resistant materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321280925.7U CN219756375U (en) | 2023-05-25 | 2023-05-25 | L-shaped hot blast stove for gasifying fuel gas by pyrolysis of sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321280925.7U CN219756375U (en) | 2023-05-25 | 2023-05-25 | L-shaped hot blast stove for gasifying fuel gas by pyrolysis of sludge |
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| Publication Number | Publication Date |
|---|---|
| CN219756375U true CN219756375U (en) | 2023-09-26 |
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ID=88072957
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|---|---|---|---|
| CN202321280925.7U Active CN219756375U (en) | 2023-05-25 | 2023-05-25 | L-shaped hot blast stove for gasifying fuel gas by pyrolysis of sludge |
Country Status (1)
| Country | Link |
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| CN (1) | CN219756375U (en) |
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2023
- 2023-05-25 CN CN202321280925.7U patent/CN219756375U/en active Active
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