CN211400772U

CN211400772U - Improved energy-saving briquette kiln

Info

Publication number: CN211400772U
Application number: CN201921766324.0U
Authority: CN
Inventors: 陈其森; 管露森; 吴建兵
Original assignee: Quannan Jingxin Environmental Protection Material Co ltd
Current assignee: Quannan Jingxin Environmental Protection Material Co ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-09-01
Anticipated expiration: 2029-10-21

Abstract

The utility model relates to an energy-saving coal kiln after improvement, which comprises a kiln and a chimney, wherein the kiln is divided into a kiln cavity and a hearth by a retaining wall, the hearth is divided into an upper hearth, a lower hearth and an ash collecting chamber by a horizontally arranged grid plate, the chimney is communicated with the hearth by an ash returning pipe, a funnel-shaped diversion hopper positioned at the top of the lower hearth is arranged at the bottom of the uppermost grid plate, a guide pipe penetrating through the lower grid plate and extending into the ash collecting chamber is arranged at the bottom end of the diversion hopper, the inlet end of the ash returning pipe penetrates through the side wall of the chimney and is bent upwards, a conical hopper positioned below a flue gas outlet is arranged at the top end of the bending part, a filter mantle is buckled at the opening end at the top of the conical hopper, a blanking channel is formed between the edge of the filter mantle and the inner side wall of the chimney, the outlet end of the ash returning pipe extends into the diversion hopper in the lower hearth, and a guide, and the top end of the flow guide pipe is provided with a protective cover. The utility model discloses simple structure, convenient to use.

Description

Improved energy-saving briquette kiln

Technical Field

The invention relates to an improved energy-saving briquette kiln.

Background

The existing coal-fired kiln process flow is that a combustion chamber provides heat energy and ash, the heat energy and the ash enter a kiln cavity to fire products, and a lot of residual ash and high-temperature flue gas are directly discharged to the atmosphere through a chimney, so that the environment is polluted, and a large amount of energy and precious ash are wasted.

For example, an energy-saving and environment-friendly firewood burning kiln with publication number CN207066121U, which solves the above problems, has the following disadvantages, such as: 1. the fuel ash in the upper hearth easily falls onto the top end surface of the fuel in the lower hearth through the aperture of the grid plate, so that the top end of the fuel in the lower hearth is covered and wrapped by a thicker layer of ash, and the combustion work of the fuel in the lower hearth is influenced; 2. the outlet of the ash return pipe is blown from top to bottom to easily blow up a small amount of ashes on the top end surface of the fuel in the upper hearth, so that the ashes can be greatly diffused in the upper hearth and flow into the kiln cavity through the fire inlet, the outlet of the ash return pipe is far away from the top end surface of the fuel in the upper hearth, and meanwhile, the downward blowing air can not easily blow the fuel in the upper hearth to improve the combustion efficiency of the fuel.

Disclosure of Invention

The invention aims to provide an improved energy-saving briquette kiln.

The technical problem of the invention is mainly solved by the following technical scheme:

an improved energy-saving briquette kiln comprises a kiln and a chimney, wherein the kiln is divided into a kiln cavity and a hearth by a retaining wall, a flue gas outlet communicated with the chimney is formed in the side wall of the kiln cavity, the hearth is divided into an upper hearth, a lower hearth and an ash collecting chamber by a horizontally arranged grid plate, fire inlets communicated with the kiln cavity are formed in the side walls of the upper hearth and the lower hearth, the chimney is communicated with the hearth through an ash returning pipe, an induced draft fan is arranged on the ash returning pipe, the grid plate is of a downward sunken arc-shaped sunken structure, a guide hopper which is in a funnel shape and is positioned at the top of the lower hearth is arranged at the bottom of the uppermost grid plate, a guide pipe which penetrates through the grid plate below and extends into the ash collecting chamber is arranged at the bottom end of the guide hopper, a bent part is bent upwards and penetrates through the side wall of the chimney, and a conical hopper positioned below the flue gas outlet is arranged at the top end, and the opening end at the top of the conical hopper is buckled with a filter cover, a blanking channel is formed between the edge of the filter cover and the inner side wall of the chimney, the outlet end of the ash return pipe extends into a diversion hopper in the lower hearth, the outlet end of the ash return pipe is upwards bent to form a diversion pipe, the distance between the top end of the diversion pipe and the bottom end of the diversion hopper is not less than 10cm, the top end of the diversion pipe is provided with a protective cover, and the side wall of the diversion pipe is provided with a support rod fixedly connected with the protective cover.

Preferably, a cleaning opening is formed in the bottom end of the side wall of the chimney.

Preferably, the bottom ends of the side walls of the upper hearth and the lower hearth are provided with operation openings positioned above the corresponding grid plates.

Preferably, the protection casing is the pot-shaped structure of back-off setting, and wherein the protection casing diameter is greater than the honeycomb duct diameter.

The invention has the beneficial effects that:

1. in the invention, after ash obtained by burning the fuel in the upper hearth falls down from the aperture of the grid plate, the ash can fall into the guide hopper, is collected and flows into the material guide pipe, and finally flows into the ash collecting chamber through the material guide pipe for storage, and cannot directly fall on the top end surface of the fuel in the lower hearth like the prior art, so that the top end of the fuel in the lower hearth is covered with a layer of thicker ash to wrap the ash, and the burning work of the fuel in the lower hearth is influenced.

2. When the induced draft fan works, high-temperature flue gas and part of ash discharged into a chimney from a flue gas outlet are sucked and pumped into a hearth for secondary heating and recycling through an ash return pipe and a conical hopper, so that the aim of saving energy is fulfilled. And through returning in the ash pipe with high temperature flue gas and ashes suction conduction funnel, upwards flow in order to blow the bottom of burning fuel in the furnace chamber by the gaseous outflow of honeycomb duct to accelerate its combustion efficiency, because this gas piles up the interior outflow of honeycomb duct in a comparatively confined space that constitutes between the fuel above conduction funnel and grid tray, lead to the interior fuel of furnace chamber to block it and prevent that it from blowing up the ashes on the fuel top terminal surface in a large number, thereby promoted the environment in the furnace chamber, and just be difficult for taking place because of having in the furnace a large amount of diffuse ashes and flow into the problem in the furnace chamber from the fire inlet.

Drawings

Fig. 1 is a schematic structural view of the present invention.

In the figure: 1. the device comprises a kiln, 101, a kiln cavity, 102, a hearth, 121, an upper hearth, 122, a lower hearth, 123, an ash collecting chamber, 2, a chimney, 3, an ash returning pipe, 4, a grid plate, 5, a flow guide hopper, 6, a material guide pipe, 7, a bending part, 8, a conical hopper, 9, a filter cover, 10, a blanking channel, 11, a flow guide pipe, 12, a protective cover, 13, a support rod, 14, a cleaning opening, 15 and an operation opening.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

The utility model provides an improve back energy-conserving moulded coal kiln, includes kiln 1 and chimney 2, wherein kiln 1 is separated into kiln chamber 101 and furnace 102 with it by the barricade, and sets up the exhanst gas outlet with 2 intercommunications of chimney on the kiln chamber 101 lateral wall, grid tray 4 through the level setting separates into furnace 121, lower furnace 122 and dust collecting chamber 123 with it in the furnace 102, wherein is provided with the fire inlet with kiln chamber 101 intercommunication on the lateral wall of last furnace 121 and lower furnace 122, chimney 2 is through 3 intercommunication furnace 102 of return ash pipe, and is provided with the draught fan on the return ash pipe 3.

In this embodiment, the grid plates 4 are of a downwardly concave arc-shaped concave structure, wherein the bottom of the uppermost grid plate 4 is provided with a funnel-shaped guide hopper 5 located at the top of the lower hearth 122, and the bottom end of the guide hopper 5 is welded with a guide pipe 6 penetrating through the lower grid plate 4 and extending into the ash collection chamber 123, as shown in fig. 1, when ash obtained by the combustion of the fuel in the upper hearth 121 falls from the aperture of the grid plate 4, the ash falls into the guide hopper 5 and flows into the guide pipe 6, and finally flows into the ash collection chamber 123 through the guide pipe 6 for storage, and does not directly fall onto the top end surface of the combustion fuel in the lower hearth 122 as before, so that the top end of the combustion fuel in the lower hearth 122 is covered with a thicker layer of ash to wrap the ash, thereby affecting the combustion work of the fuel in the lower hearth 122.

Wherein, the grid plate 4 is a downward concave arc structure, so that ash or impurities on the grid plate 4 easily flow to the middle concave part along the arc surface and are not easy to be deposited in an included angle formed between the edge of the grid plate 4 and the side wall of the hearth 102, the bottom ends of the side walls of the upper hearth 121 and the lower hearth 122 are provided with operation ports 15 above the corresponding grid plate 4, after the operation and the cooling are stopped, tools can be inserted into the upper hearth 121 and the lower hearth 122 through opening the operation ports 15 to clean the deposits on the grid plate 4, so that the deposits fall from the aperture of the grid plate 4, and the guide hopper 5 can be knocked to ensure that the impurities are not adhered to the inner side wall and are not easy to flow out from the guide pipe 6, and the tools are not inserted into the hearth 2 through the feed inlet of the hearth 2 to clean the hearth, because the feed inlet of the hearth generally has a high-low grid plate fall with the bottom end of the corresponding hearth 2, then, after the tool is inserted through the feed opening, a large height difference may occur, and it is difficult for the tool to reach every corner of the louver 4 and smoothly operate the same.

As shown in fig. 1, the inlet end of the ash returning pipe 3 penetrates through the side wall of the chimney 2 and is bent upwards to form a bent portion 7, the top end of the bent portion 7 is provided with a conical hopper 8 located below the flue gas outlet, the top opening end of the conical hopper 8 is buckled with a filter cover 9, and a blanking channel 10 is formed between the edge of the filter cover 9 and the inner side wall of the chimney 2, so that when the induced draft fan works, high-temperature flue gas and part of ash discharged into the chimney 2 from the flue gas outlet are sucked and pumped into the hearth 102 through the ash returning pipe 3 and the conical hopper 8 to be heated secondarily and recycled, and the purpose of saving energy is achieved.

And because of the existence of the filter cover 9, impurities with larger volume are not easy to enter the conical hopper 8, but are easy to fall along the blanking channel 10 and fall to the bottom of the chimney 2 to be deposited, and the deposits can be cleaned through the cleaning port 14 arranged at the bottom end of the side wall of the chimney 2, in this embodiment, the conical hopper 8 is arranged in the chimney 2 close to the bottom of the flue gas outlet, namely, the distance between the conical hopper and the flue gas outlet is shortened, so that the discharged flue gas is not greatly cooled in the circulating process, namely, the discharged flue gas is sucked into the conical hopper 8, if the conical hopper 8 is far above the flue gas outlet, the flue gas flowing out of the flue gas outlet needs to flow through a long distance at one end to contact the conical hopper 8, and the heat is easily lost in the long distance during which the flue gas flows.

Meanwhile, the outlet end of the ash returning pipe 3 extends into the diversion bucket 5 in the lower hearth 122, wherein the outlet end of the ash returning pipe 3 is bent upwards to form a diversion pipe 11, the distance between the top end of the diversion pipe 11 and the bottom end of the diversion bucket 5 is not less than 10cm, after the high-temperature flue gas and ash are pumped into the flow guide hopper 5 through the ash return pipe 3, the gas flowing out of the flow guide pipe 11 flows upwards to blow the bottom of the combustion fuel in the upper hearth 121, so that the combustion efficiency is accelerated, because the gas flows out of the draft tube 11 in a closed space formed between the draft hopper 5 and the fuel accumulated above the grid plate 4, the fuel in the upper hearth 121 can block the fuel to prevent the fuel from blowing up a large amount of ash on the top end face of the fuel, thereby improving the environment in the furnace and preventing the problem that a large amount of diffusion ash exists in the furnace 102 and flows into the kiln chamber 101 from the fire inlet.

The interval between 11 tops of honeycomb duct and 5 bottoms of water conservancy diversion fill in this embodiment is not less than 10cm, owing to have higher height drop between the two for even deposit ash and also be difficult for flowing backward to inside from 11 open ends of honeycomb duct in the water conservancy diversion fill 5, and be provided with protection casing 12 on 11 tops of honeycomb duct, wherein the honeycomb duct 11 lateral wall is provided with the bracing piece 13 with protection casing 12 fixed connection, this protection casing 12 is the pot-shaped structure of back-off setting, and the diameter of protection casing 12 is greater than 11 diameters of honeycomb duct. The ash in the upper hearth 121 is prevented from falling into the draft tube 11 through the apertures of the grid plates 4 and blocking the draft tube by the shield 12.

The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. An improved energy-saving briquette kiln comprises a kiln and a chimney, wherein the kiln is divided into a kiln cavity and a hearth by a retaining wall, a flue gas outlet communicated with the chimney is formed in the side wall of the kiln cavity, the hearth is divided into an upper hearth, a lower hearth and an ash collecting chamber by a horizontally arranged grid plate, fire inlets communicated with the kiln cavity are formed in the side walls of the upper hearth and the lower hearth, the chimney is communicated with the hearth through an ash returning pipe, and an induced draft fan is arranged on the ash returning pipe, the improved energy-saving briquette kiln is characterized in that the grid plate is of an arc-shaped sunken structure which is sunken downwards, a guide hopper which is positioned at the top of the lower hearth in a funnel shape is arranged at the bottom of the uppermost grid plate, a guide pipe which penetrates through the grid plate below and extends into the ash collecting chamber is arranged at the bottom of the guide hopper, the inlet end of the ash returning pipe penetrates through the side wall of the chimney and is bent upwards, and a bent part, and the opening end at the top of the conical hopper is buckled with a filter cover, a blanking channel is formed between the edge of the filter cover and the inner side wall of the chimney, the outlet end of the ash return pipe extends into a diversion hopper in the lower hearth, the outlet end of the ash return pipe is upwards bent to form a diversion pipe, the distance between the top end of the diversion pipe and the bottom end of the diversion hopper is not less than 10cm, the top end of the diversion pipe is provided with a protective cover, and the side wall of the diversion pipe is provided with a support rod fixedly connected with the protective cover.

2. The improved energy-saving briquette kiln as set forth in claim 1, wherein the bottom end of the side wall of the chimney is provided with a cleaning opening.

3. The improved energy-saving briquette kiln as set forth in claim 1, wherein the bottom ends of the side walls of the upper and lower hearths are provided with operating openings above the corresponding grid plates.

4. The improved energy-saving briquette kiln as set forth in claim 1, wherein the protective cover is in a pot-shaped structure with an inverted arrangement, wherein the diameter of the protective cover is larger than that of the guide pipe.