CN211823753U

CN211823753U - Pulverized coal drying system

Info

Publication number: CN211823753U
Application number: CN201922291324.6U
Authority: CN
Inventors: 徐宁
Original assignee: Shandong Haiyin Energy Saving Co ltd
Current assignee: Shandong Haiyin Energy Saving Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-10-30
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a buggy drying system contains: a burner; the heat supply device comprises a main combustion chamber and a temperature reduction chamber which are communicated with each other, and the main combustion chamber is communicated with the combustor; a plurality of staggered retaining walls are arranged in the main combustion chamber, and a channel for enabling air to flow is formed between each retaining wall and a top plate and a bottom plate of the main combustion chamber; and the dryer is communicated to the cooling chamber. The utility model discloses a buggy drying system's main combustion chamber adopts the dislocation baffle to separate for a plurality of "rooms", realizes cooling down step by step and each room does not interfere with each other to cooperation cooling room makes the buggy cool down below the combustion point, and the hot-blast temperature control of combustor just can not cause buggy burning or even explosion risk easily.

Description

Pulverized coal drying system

Technical Field

The utility model relates to a buggy stoving technique to more specifically relates to a buggy drying system.

Background

In the prior art, a hot blast stove is one of important devices in a pulverized coal dryer, and a good hot blast stove is a precondition for ensuring the smooth work of the pulverized coal dryer. Because, the drying operation of the pulverized coal is realized by the sufficient heat exchange between the heat entering from the hot blast stove and the materials. The traditional combustor adopts a fluidized bed furnace, generates heat by burning coal, has heavy pollution, easily causes coal dust combustion and even explosion risk due to improper control of the hot air temperature of the combustor, and cannot quickly adjust the hot air quantity.

With the gradual promotion of national energy-saving and emission-reducing policies, the adoption of a high-efficiency and environment-friendly coal powder drying mode becomes increasingly important.

Based on this, the prior art still remains to be improved. Therefore, a high-efficiency and environment-friendly pulverized coal drying system is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the prior art not enough, the utility model aims to provide a buggy drying system.

Based on the purpose, the following technical scheme is adopted:

according to the utility model discloses, a buggy drying system is provided, contain:

a burner;

the heat supply device comprises a main combustion chamber and a temperature reduction chamber which are communicated with each other, and the main combustion chamber is communicated with the combustor; a plurality of staggered retaining walls are arranged in the main combustion chamber, and a channel for enabling air to flow is formed between each retaining wall and a top plate and a bottom plate of the main combustion chamber;

the dryer is communicated to the cooling chamber;

further, the primary combustion chamber comprises a high temperature combustion chamber, a first chamber, a second chamber and a third chamber separated by the retaining wall; the high-temperature combustion chamber is communicated to the combustor; the third chamber is communicated to the temperature reduction chamber.

Further, the high temperature combustion chamber has a first temperature, the first chamber and the second chamber have a second temperature, the third chamber has a third temperature and the temperature reduction chamber has a fourth temperature; the first temperature is higher than the second temperature, the second temperature is higher than the third temperature, and the third temperature is higher than the fourth temperature.

Further, the first temperature is 1000 degrees celsius, the second temperature is 800 degrees celsius, and the fourth temperature is 350 degrees celsius.

Furthermore, the retaining walls comprise a first retaining wall, a second retaining wall and a third retaining wall; the first retaining wall and the third retaining wall are arranged on the bottom plate of the main combustion chamber, extend to the top plate of the main combustion chamber and are not in contact with the top plate of the main combustion chamber; the second retaining wall is arranged on the top plate of the main combustion chamber, extends towards the bottom plate of the main combustion chamber and is not in contact with the bottom plate of the main combustion chamber.

Further, an air distribution port for introducing air is arranged on a top plate of the main combustion chamber in the first chamber and the second chamber.

Furthermore, a safety valve plate is arranged at the air distribution port, so that the safety valve plate can be automatically opened when the system is powered off or stops air.

Furthermore, the top plate of the cooling chamber is provided with an air distribution port with a safety valve plate, and the side panel of the cooling chamber is provided with an air distribution port.

Further, the burner is a natural gas burner.

The words used in the present invention such as "top plate", "bottom plate", "side panel" and the like to indicate the relationship between position and direction are explained as follows: the position of each part of the whole system, which is close to the ground, is a bottom plate, the position far away from the ground is a top plate, and the panel connecting the top plate and the bottom plate is a side panel.

The utility model discloses following beneficial technological effect has:

the utility model discloses a safe valve plate is installed on pulverized coal drying system's combustion chamber air distribution port upper portion, and under the condition that has a power failure suddenly or stop the wind, the safe valve plate is automatic to be opened, guarantees system operation safety.

The utility model discloses a buggy drying system's main combustion chamber adopts the dislocation baffle to separate for a plurality of "rooms", realizes cooling down step by step and each room does not interfere with each other to cooperation cooling room makes the buggy cool down below the combustion point, and the hot-blast temperature control of combustor just can not cause buggy burning or even explosion risk easily.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some implementation cases of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a pulverized coal drying system according to an embodiment of the present invention;

list of reference numerals

1-burner, 2-heating device, 21-main combustion chamber, 22-cooling chamber, 211-high temperature combustion chamber, 212-first chamber, 213-second chamber, 214-third chamber, 215-first retaining wall, 216-second retaining wall, 217-third retaining wall, 23-air distribution opening, 24-safety valve plate and 3-dryer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

Fig. 1 shows a pulverized coal drying system of the present embodiment, which includes a burner 1, a heat supply device 2, and a dryer 3. In the present embodiment, the burner 1 is a natural gas burner.

The heating device 2 comprises a main combustion chamber 21 and a temperature reduction chamber 22 which are communicated with each other, and the main combustion chamber 21 is communicated with the combustor 1; the dryer 3 communicates with the temperature decrease chamber 22.

A plurality of staggered retaining walls are arranged in the main combustion chamber 21, and a channel for enabling air to flow is formed between each retaining wall and a top plate and a bottom plate of the main combustion chamber 21; the primary combustion chamber 21 includes a high temperature combustion chamber 211, a first chamber 212, a second chamber 213, and a third chamber 214 separated by a retaining wall; the high-temperature combustion chamber 211 is communicated to the combustor 1; the third chamber 214 is connected to the temperature reduction chamber 22.

The retaining walls comprise a first retaining wall 215, a second retaining wall 216 and a third retaining wall 217; the first retaining wall 215 and the third retaining wall 217 are provided on the floor of the main combustion chamber 21 and extend toward the ceiling of the main combustion chamber 21 and do not contact with the ceiling of the main combustion chamber 21; the second baffle wall 216 is provided on the ceiling of the main combustion chamber 21 and extends toward the floor of the main combustion chamber 21 and does not contact the floor of the main combustion chamber 21. The retaining wall is arranged to prevent hot air from directly sucking into the dryer 3 to affect stable combustion of flame.

The main combustion chamber 21 in the first and

second chambers

212 and 213 has an air distribution opening 23 in the ceiling for introducing air. The air distribution port 23 is provided with a safety valve plate 24, so that the safety valve plate 24 can be automatically opened when the system is powered off or the air is cut off. When the system works normally, the indoor of the system is in a negative pressure state, and the safety valve plate 24 covers the air distribution port 23 due to the negative pressure; when the system is powered off or stopped, the indoor of the system is in a normal pressure recovery state, and the safety valve plate 24 is automatically opened at the moment.

The high temperature combustion chamber 211 has a first temperature, the first chamber 212 and the second chamber 213 have a second temperature, the third chamber 214 has a third temperature and the temperature reduction chamber 22 has a fourth temperature; the first temperature is higher than the second temperature, the second temperature is higher than the third temperature, and the third temperature is higher than the fourth temperature.

The first temperature is 1000 ℃, the second temperature is 800 ℃, the third temperature is 800 ℃ or slightly lower than 800 ℃, and the fourth temperature is 350 ℃.

The combustion chamber makes the pulverized coal fully combusted and releases most of heat, the first chamber 212 and the second chamber 213 are cold and hot air exchange chambers with certain temperature reduction, the third chamber 214 is a stabilization chamber, and the airflow in the fourth chamber is further reduced to be below the combustion point of the pulverized coal.

The top plate of the cooling chamber 22 is provided with an air distribution opening 23 with a safety valve plate 24, and the side panel of the cooling chamber 22 is provided with an air distribution opening 23. So as to be rapidly cooled in the cooling chamber 22.

The first chamber 212 and the second chamber 213 are additionally provided with air distribution ports 23, the distributed air is mixed with hot air, the hot air quantity is increased, the production temperature requirement is gradually met, the hot air is in a turbulent flow state, and the temperature of the hot air is reduced from 1000 ℃ to 350 ℃ (below the combustion point of pulverized coal) before the hot air enters the dryer 3.

In actual use, the pulverized coal is conveyed to the natural gas burner, the natural gas burner ignites the pulverized coal, the ignited pulverized coal is sprayed into the high-temperature combustion chamber 211 to be fully combusted to release most of heat, the heat generated by the pulverized coal is gradually cooled and stabilized through the first chamber 212, the second chamber 213 and the third chamber 214, and finally the heat enters the cooling chamber 22 through a heat transfer cylinder (not shown), is cooled to 350 ℃ and then enters the dryer 3 through the heat transfer cylinder (not shown) to be used for drying materials.

The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. Furthermore, although elements disclosed in the embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.

The serial numbers of the embodiments disclosed in the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to suggest that the scope of the disclosure of embodiments of the present invention (including the claims) is limited to these examples; within the idea of embodiments of the invention, also combinations between technical features in the above embodiments or in different embodiments are possible, and there are many other variations of different aspects of embodiments of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A pulverized coal drying system is characterized by comprising:

a burner;

and the dryer is communicated to the cooling chamber.

2. The pulverized coal drying system according to claim 1, wherein the primary combustion chamber comprises a high temperature combustion chamber, a first chamber, a second chamber and a third chamber separated by the retaining wall; the high-temperature combustion chamber is communicated to the combustor; the third chamber is communicated to the temperature reduction chamber.

3. The pulverized coal drying system according to claim 2, wherein the high temperature combustion chamber has a first temperature, the first chamber and the second chamber have a second temperature, the third chamber has a third temperature and the temperature reduction chamber has a fourth temperature; the first temperature is higher than the second temperature, the second temperature is higher than the third temperature, and the third temperature is higher than the fourth temperature.

4. The pulverized coal drying system according to claim 3, wherein the first temperature is 1000 degrees Celsius, the second temperature is 800 degrees Celsius and the fourth temperature is 350 degrees Celsius.

5. The pulverized coal drying system according to claim 2, wherein the retaining wall comprises a first retaining wall, a second retaining wall and a third retaining wall; the first retaining wall and the third retaining wall are arranged on the bottom plate of the main combustion chamber, extend to the top plate of the main combustion chamber and are not in contact with the top plate of the main combustion chamber; the second retaining wall is arranged on the top plate of the main combustion chamber, extends towards the bottom plate of the main combustion chamber and is not in contact with the bottom plate of the main combustion chamber.

6. The pulverized coal drying system according to claim 2, wherein a top plate of the main combustion chamber in the first chamber and the second chamber is provided with an air distribution port for introducing air.

7. The pulverized coal drying system according to claim 6, wherein a safety valve plate is arranged at the air distribution port, so that the safety valve plate is automatically opened when the system is powered off or the air is cut off.

8. The pulverized coal drying system according to claim 2, wherein a top plate of the temperature reduction chamber is provided with an air distribution opening with a safety valve plate, and a side panel of the temperature reduction chamber is provided with an air distribution opening.

9. The pulverized coal drying system of claim 1 wherein the burner is a natural gas burner.