Labyrinth flame path for dry distillation process of silty coal
By employing a labyrinthine flue in the dry distillation process of pulverized coal, and utilizing the high-temperature gas inside the refractory brick furnace to heat the pulverized coal, the problems of fixed carbon loss and harmful gas generation in existing technologies have been solved, achieving higher energy utilization and environmental protection.
Patent Information
- Application Number
- CN202520251103.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing open vertical flues result in the loss of fixed carbon and the generation of harmful nitrogen oxides during the dry distillation of pulverized coal, polluting the environment and having low energy efficiency.
The labyrinthine fire channel system employs multiple sealed fire channels between refractory brick furnace chambers to use high-temperature gas to heat pulverized coal, thereby avoiding direct combustion of pulverized coal and improving energy utilization.
It effectively avoids the generation of harmful gases, improves energy efficiency, and enhances safety and environmental protection.
Smart Images
Figure CN223723066U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of coal chemical industry, especially relates to a labyrinthine fire channel for powder coal dry distillation process. BACKGROUND
[0002] The existing open vertical fire channel is only suitable for internal heating dry distillation furnace, which causes great safety hazard and seriously pollutes the environment.
[0003] The open vertical fire channel is matched with a burner to spray the mixed gas of coal gas and air into the furnace to heat the raw coal (block coal, seed coal), and the raw coal is formed into semi-coke in the furnace through the semi-dry distillation process. The existing fire channel has the following problems: the fire channel is a direct heating type, and air is involved in the whole dry distillation process. First, the oxygen in the air oxidizes and burns part of the raw coal, resulting in the loss of part of the fixed carbon, and the fixed carbon content of the produced semi-coke is about 80%; second, the nitrogen in the air forms harmful nitrogen oxides in the furnace, the quality of the coal gas is low, the environment is polluted, safety hazards are caused, and energy is wasted. SUMMARY
[0004] In view of the above problems, the utility model aims at providing a labyrinthine fire channel for powder coal dry distillation process, which sets multiple closed fire channels between the firebrick furnaces to heat and dry distill the powder coal by the high-temperature gas in the firebrick furnaces through the fire channel bottom plate, avoids the direct combustion of the powder coal to form harmful nitrogen oxides in the existing open vertical fire channel during dry distillation, and improves the energy utilization rate.
[0005] The technical scheme of the utility model is as follows: a labyrinthine fire channel for powder coal dry distillation process, which comprises a fireproof concrete foundation, a dry distillation chamber wall body is arranged above the fireproof concrete foundation, multiple firebrick furnaces are arranged on the dry distillation chamber wall body, multiple air eyes are arranged on the walls on both sides of the firebrick furnaces, fire channels are arranged between the air eyes between adjacent firebrick furnaces, a flue is connected between the multiple fire channels between adjacent firebrick furnaces, a furnace door is arranged at the inlet of the firebrick furnace, a burner is arranged on the upper portion of the furnace door, heat-resistant and wear-resistant cover plates are arranged on the top of the firebrick furnace and the fire channel, and heat-resistant and wear-resistant rails are arranged on both sides of the cover plates along the length direction of the dry distillation chamber wall body.
[0006] The dry distillation chamber wall body is a multilayer arched structure, and the dry distillation chamber wall body comprises, from the outside to the inside, a red brick wall, a rock wool heat preservation layer and a firebrick wall.
[0007] The number of the fire channels is greater than or equal to 2, and the fire channels are arranged vertically with the flue.
[0008] The number of the firebrick furnaces is greater than or equal to 1, and the number of the air eyes on the walls on both sides of the firebrick furnaces is greater than or equal to 2.
[0009] The fire channel is a closed rectangular hollow masonry, and the specific size of the rectangular hollow masonry is 36 m in length, 2 m in width and 0.8 m in height.
[0010] The technical effect of the utility model lies in that: the utility model sets multiple closed fire channels between the firebrick hearths, and the high-temperature gas in the firebrick hearths is used to heat and dry distill the powdery coal through the fire channel bottom plate, so that the powdery coal is directly combusted to form harmful nitrogen oxide gas during the dry distillation of the open straight fire channel, and the energy utilization rate is improved.
[0011] The utility model will be further described below with reference to the drawings. DRAWINGS
[0012] Fig. 1 is the structure front view of a labyrinth fire channel for powdery coal dry distillation process of the utility model.
[0013] Fig. 2 is the structure side view of a labyrinth fire channel for powdery coal dry distillation process of the utility model.
[0014] Fig. 3 is the structure top view of a labyrinth fire channel for powdery coal dry distillation process of the utility model.
[0015] Drawing reference: 1-fireproof concrete foundation; 2-firebrick hearth; 3-fire channel; 4-air eye; 5-furnace door; 6-burner; 7-heat-resistant and wear-resistant cover plate; 8-heat-resistant and wear-resistant track; 9-dry distillation chamber wall; 91-red brick wall; 92-rock wool insulation layer; 93-firebrick wall; 10-flue. DETAILED DESCRIPTION Example 1
[0016] As Figs. 1-3 shown, a labyrinth fire channel for powdery coal dry distillation process, including fireproof concrete foundation 1, the fireproof concrete foundation 1 top is equipped with dry distillation chamber wall 9, the dry distillation chamber wall 9 top is equipped with multiple firebrick hearth 2, the firebrick hearth 2 both sides wall is equipped with multiple air eye 4, the air eye 4 between adjacent firebrick hearth 2 is equipped with fire channel 3, the multiple fire channel 3 between adjacent firebrick hearth 2 is connected with flue 10, the firebrick hearth 2 import is equipped with furnace door 5, the furnace door 5 upper portion is equipped with burner 6, the firebrick hearth 2 and fire channel 3 top is equipped with heat-resistant and wear-resistant cover plate 7, the cover plate 7 both sides are equipped with heat-resistant and wear-resistant track 8 along the length direction of dry distillation chamber wall.
[0017] The utility model discloses when using, bring the powdery coal into the heat -resisting wear -resisting cover plate 7, make the powdery coal on the heat -resisting wear -resisting cover plate 7 from beginning to end do uniform velocity movement through the scraper conveyor, and the combustible coal gas mixes and ignites after air injection into the firebrick hearth 2, and high temperature gas enters the flue 3 through the air eye 4, heats the heat -resisting wear -resisting cover plate 7, makes the temperature in the dry distillation chamber reach 650 DEG C, and carries out dry distillation to the powdery coal. Example 2
[0018] On the basis of example 1, in this embodiment, preferably, the dry distillation chamber wall 9 is a multilayer arched structure, and the red brick wall 91, the rock wool heat preservation layer 92 and the firebrick wall 93 are sequentially arranged from outside to inside.
[0019] The dry distillation chamber wall 9 is a multilayer arched structure, and the red brick wall 91, the rock wool heat preservation layer 92 and the firebrick wall 9 are sequentially arranged from outside to inside, so that the dry distillation chamber wall is fireproof and heat-insulating. Example 3
[0020] On the basis of example 1 or example 2, in this embodiment, preferably, the number of the flues 3 is greater than or equal to 2, and the flues 3 are vertically arranged with the flue 10.
[0021] The number of the flues 3 is greater than or equal to 2, and the flues 3 are vertically arranged with the flue 10, so that the construction is facilitated. Example 4
[0022] On the basis of example 1, in this embodiment, preferably, the number of the firebrick hearths 2 is greater than or equal to 1, and the number of the air eyes 4 on the walls on both sides of the firebrick hearth 2 is greater than or equal to 2.
[0023] The number of the firebrick hearths 2 is greater than or equal to 1, and the number of the air eyes 4 on the walls on both sides of the firebrick hearth 2 is greater than or equal to 2, so that the flues are arranged on both sides of the firebrick hearth, the number of the flues is increased, and the heat utilization rate of the high-temperature gas is improved. Example 5
[0024] On the basis of example 1 or example 4, in this embodiment, preferably, the flue 3 is a closed rectangular hollow masonry, and the specific size of the rectangular hollow masonry is 36m in length, 2m in width and 0.8m in height.
[0025] The flue 3 is a closed rectangular hollow masonry, so that the construction is facilitated, and the rectangular hollow masonry is beneficial to fully utilize the heat of the high-temperature gas.
[0026] The working principle of the utility model is: when working, the powdery coal is brought into the heat and wear resistant cover plate 7, the powdery coal moves uniformly on the heat and wear resistant cover plate 7 from the beginning to the end through the scraper conveyor, the combustible gas is ignited after mixing with air and is sprayed into the firebrick hearth 2, the high-temperature gas enters the flue 3 through the air eye 4, the heat and wear resistant cover plate 7 is heated, the temperature in the dry distillation chamber reaches 650 DEG C, and the powdery coal is dry distilled.
[0027] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A labyrinth flue for use in a process for the dry distillation of silt coal, characterised in that: The application relates to a dry distillation chamber, which comprises a fireproof concrete base (1), a dry distillation chamber wall (9) arranged above the fireproof concrete base (1), a plurality of fireproof brick hearths (2) arranged on the dry distillation chamber wall (9), a plurality of air eyes (4) arranged on the two side walls of the fireproof brick hearths (2), a fire channel (3) arranged between the air eyes (4) between adjacent fireproof brick hearths (2), a flue (10) connected between the plurality of fire channels (3) between adjacent fireproof brick hearths (2), a furnace door (5) arranged at the inlet of the fireproof brick hearth (2), a burner (6) arranged on the upper portion of the furnace door (5), a heat-resistant and wear-resistant cover plate (7) arranged on the top of the fireproof brick hearth (2) and the fire channel (3), and heat-resistant and wear-resistant rails (8) arranged on the two sides of the cover plate (7) along the length direction of the dry distillation chamber wall.
2. A labyrinth flue for use in a process for the dry distillation of mealy coal according to claim 1, characterised in that: The dry distillation chamber wall (9) is a multilayer arched structure, and the dry distillation chamber wall (9) comprises, from outside to inside, a red brick wall (91), a rock wool heat preservation layer (92) and a fireproof brick wall (93).
3. A labyrinth flue for use in a process for the dry distillation of mealy coal according to claim 1, characterized in that: The number of the fire channels (3) is greater than or equal to 2, and the fire channels (3) are arranged vertically with the flue (10).
4. A labyrinth flue for use in a process for the dry distillation of mealy coal according to claim 1, characterized in that: The number of the fireproof brick hearths (2) is greater than or equal to 1, and the number of the air eyes (4) arranged on the two side walls of the fireproof brick hearths (2) is greater than or equal to 2.
5. A labyrinth flue for use in a process for the dry distillation of pulverent coal according to claim 1, characterized in that: The fire channel (3) is a closed rectangular hollow masonry, and the specific size of the rectangular hollow masonry is 36 m in length, 2 m in width and 0.8 m in height.