CN218545313U - Energy-saving vertical preheater for calcining active lime - Google Patents

Abstract

The utility model discloses an active lime calcines energy-conserving vertical preheater, including vertical preheater main part and bin outlet, vertical preheater main part comprises support and heat exchange chamber. The utility model discloses a, the flue gas pipe has been adopted, the chimney, in the in-service use process, with the flue gas pipe, the dust remover, a heat exchanger, the draught fan, chimney etc. combine together, then arrange the heat exchanger in and utilize the heat in the flue gas to realize the heat transfer between shaft kiln flue gas pipe and the sack cleaner, attach first heavy ash jar and the heavy ash jar of second before the heat exchanger and be used for subsiding the dust in the flue gas, it is higher that combustion-supporting wind also preheats messenger kiln internal combustion heat utilization rate when preheating coal gas, the dust remover entry temperature reduces substantially after blast furnace gas and combustion-supporting air absorbed heat, the dust in the flue gas makes the dust that gets into in the dust remover reduce in a large number after subsiding twice in preheating the system, coal device wholly has the power consumption low, heat utilization rate is high, the advantage that entry temperature reduces.

Description

Energy-saving vertical preheater for calcining active lime

Technical Field

The utility model relates to a production active lime equipment technical field particularly, relates to active lime calcines energy-conserving vertical pre-heater.

Background

The active lime calcining process comprising three main machines, namely a vertical preheater, a rotary kiln and a vertical cooler, has a dominant position in the lime production industry in China, wherein the preheater is a main device in a rotary kiln limestone calcining process system, limestone is fully preheated in the preheater and has a temperature of about 960 ℃, partial limestone is decomposed and gradually enters the rotary kiln to be calcined to produce active lime, namely the heat exchange effect of the limestone in the preheater directly influences the yield of the active lime, and the method also relates to the full utilization of heat energy and the normal use of subsequent process equipment of the system. Therefore, people generally pay attention to the reasonability of the structure and parameter design of the preheater.

The blast furnace gas used at present as the fuel of the shaft kiln has the following problems: 1. when the blast furnace gas is burnt with high water content, part of heat can be taken away, so that the unit consumption of the gas is increased. 2. Valves such as a quick-cutting valve, a butterfly valve and a blind plate valve in a gas pipeline are prone to being affected with damp and rusted, and have potential safety hazards when faults occur. Meanwhile, the currently used bag-type dust remover has the following problems caused by higher inlet temperature: 1. the cloth bag is easily damaged due to long-term high temperature. 2. The dedusting induced draft fan system is easy to break down or even damage in long-term high-temperature environment use. These problems all can increase the maintenance frequency and cause the waste of manpower and material resources.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides an active lime calcines energy-conserving vertical pre-heater possesses the advantage that the power consumption is low, the heat utilization efficiency is high, the entry temperature reduces, and then solves the problem in the above-mentioned background art.

(II) technical scheme

For realizing the above-mentioned advantage that the power consumption is low, the heat utilization efficiency is high, the entry temperature reduces, the utility model discloses a concrete technical scheme as follows:

active lime calcines energy-conserving vertical preheater, including vertical preheater main part and bin outlet, vertical preheater main part comprises support and heat exchange chamber, top position fixed mounting has the flue gas pipe between the support both sides, flue gas pipe top surface position is connected with the draught fan, flue gas bottom of tubes portion surface position is connected with first ash can that sinks, first ash can bottom surface position that sinks is connected with the second and sinks the ash can, the ash can bottom surface position that sinks of second is connected with the heat exchanger, the inside intermediate position of heat exchanger evenly is equipped with a plurality of groups dispersion heat exchange tube, heat exchanger bottom surface position is connected with the dust remover, the dust remover top is located support top position and is connected with the chimney.

Furthermore, a coal gas inlet pipe and an air inlet pipe are respectively arranged on the surface of one side of the heat exchanger, and a heat exchange chamber is fixedly arranged on the bottom of the surface of one end of the support on the other side of the heat exchanger.

Furthermore, the surface positions of two ends of the heat exchange chamber are respectively provided with a feed inlet and a discharge outlet.

Furthermore, the flue gas pipe, the chimney, the first ash settling tank, the second ash settling tank, the heat exchanger, the dust remover and the heat exchange chamber are all connected in the axial direction through conveying pipes.

Furthermore, the dust remover is composed of a bag-type dust remover.

Further, the flue gas pipe is composed of a shaft kiln flue gas pipe.

(III) advantageous effects

Compared with the prior art, the utility model provides an active lime calcines energy-conserving vertical pre-heater possesses following beneficial effect:

(1) The utility model discloses a, the flue gas pipe has been adopted, the chimney, in the in-service use process, with the flue gas pipe, the dust remover, a heat exchanger, the draught fan, chimney etc. combine together, area is few, high use efficiency, then arrange the heat exchanger in between shaft kiln flue gas pipe and the sack cleaner and utilize the heat realization heat transfer in the flue gas, it is used for subsiding the dust in the flue gas to attach first heavy ash jar and second heavy ash jar before the heat exchanger, it more is favorable to the heat exchange to use the dispersion heat exchange tube in the heat exchanger, combustion air absorbs the heat in the heat exchanger simultaneously, combustion-supporting wind also preheats when preheating coal gas makes the kiln in burn more abundant heat utilization rate higher, blast furnace gas and combustion-supporting air absorb heat back dust remover entry temperature reduce by a wide margin, the dust in the flue gas subsides after twice in the preheating system makes the entering dust remover reduce in a large number, the chimney discharges more environmental protection, coal device wholly has the power consumption is low, heat utilization rate is high, the advantage that entry temperature reduces.

Drawings

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

FIG. 1 is a schematic structural diagram of an energy-saving vertical preheater for calcining active lime provided by the utility model;

FIG. 2 is a schematic view of the structure of the heat exchange tube of the present invention;

fig. 3 is a schematic structural view of the heat exchange chamber of the present invention.

In the figure:

1. a vertical preheater body; 2. a support; 3. an induced draft fan; 4. a flue gas pipe; 5. a chimney; 6. a first ash settling tank; 7. a second ash settling tank; 8. a heat exchanger; 9. dispersing heat exchange tubes; 10. a dust remover; 11. a heat exchange chamber; 12. a feed inlet; 13. a discharge outlet; 14. a gas inlet pipe; 15. an air inlet pipe; 16. a delivery pipe.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the embodiment of the utility model, the energy-conserving vertical preheater is calcined to active lime is provided.

Now combine the attached drawing and detailed embodiment right the utility model discloses it further explains, as shown in fig. 1-3, according to the utility model discloses energy-conserving vertical preheater is calcined to active lime, including vertical preheater main part 1 and bin outlet 13, vertical preheater main part 1 comprises support 2 and heat exchange chamber 11, top position fixed mounting has flue gas pipe 4 between the support 2 both sides, flue gas pipe 4 top surface position is connected with draught fan 3, flue gas pipe 4 bottom surface position is connected with first ash settling tank 6, first ash settling tank 6 bottom surface position is connected with the second and sinks ash settling tank 7, the second sinks ash tank 7 bottom surface position to be connected with heat exchanger 8, the inside intermediate position of heat exchanger 8 evenly is equipped with a plurality of components and disperses heat exchange tube 9, heat exchanger 8 bottom surface position is connected with dust remover 10, dust remover 10 top is located support 2 top position and is connected with chimney 5.

In one embodiment, a gas inlet pipe 14 and an air inlet pipe 15 are respectively installed on the surface of one side of the heat exchanger 8, a heat exchange chamber 11 is fixedly installed on the bottom of the surface of one end of the support 2 on the other side of the heat exchanger 8, the gas inlet pipe 14 is arranged to facilitate the use of blast furnace gas, and the air inlet pipe 15 is used to facilitate the use of combustion air.

In one embodiment, the heat exchange chamber 11 is provided with a material inlet 12 and a material outlet 13 at two end surfaces, respectively, and the active lime can be calcined by hot gas through the heat exchange chamber 11.

In one embodiment, the flue gas pipe 4, the chimney 5, the first ash settling tank 6, the second ash settling tank 7, the heat exchanger 8, the dust remover 10 and the heat exchange chamber 11 are connected through the conveying pipe 16, a plurality of devices can be connected through the conveying pipe 16 for use, and the using smoothness of the device is ensured.

In one embodiment, the dust collector 10 is a bag-type dust collector, and dust in the high-temperature flue gas can be removed through the dust collector 10, so that environmental pollution is avoided.

In one embodiment, the flue gas pipe 4 is composed of a shaft kiln flue gas pipe, and the generated high-temperature flue gas is conveyed and guided through the flue gas pipe 4 for subsequent use.

The working principle is as follows: in the actual use process, a flue gas pipe 4, a dust remover 10, a heat exchanger 8, an induced draft fan 3, a chimney 5 and the like are combined together, the occupied area is small, the use efficiency is high, then the heat exchanger 8 is arranged between a flue gas pipe of a shaft kiln and a bag-type dust remover, heat exchange is realized by utilizing heat in the flue gas, a first ash settling tank 6 and a second ash settling tank 7 are additionally arranged in front of the heat exchanger 8 and used for settling dust in the flue gas, a dispersing heat exchange pipe 9 is used in the heat exchanger 8 to facilitate heat exchange, combustion-supporting air absorbs heat in the heat exchanger 8 at the same time, the combustion-supporting air preheats the coal gas to enable the combustion in the kiln to be more sufficient and the heat utilization rate to be higher, the inlet temperature of the dust remover 10 is greatly reduced after the heat is absorbed by the blast furnace gas and the combustion-supporting air in the preheating system, the dust entering the dust remover 10 is greatly reduced after the dust is settled twice in the preheating system, the chimney discharge is more environment-friendly, the heat value of the coal gas is improved by about 2.5%, the single consumption of the coal gas is reduced by about 50-100 cubic degrees, the average calcining temperature in the kiln is improved by about 40 ℃, the single day yield is improved by about 10 tons, the inlet temperature of the original about 210 ℃, and the integral heat utilization rate of the dust remover is reduced by the energy consumption of the kiln, and the energy consumption of the dust remover, and the dust remover has the high utilization rate of the kiln.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "disposed", "connected", "fixed", "screwed" and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. Active lime calcines energy-conserving vertical preheater, including vertical preheater main part (1) and bin outlet (13), its characterized in that, vertical preheater main part (1) comprises support (2) and heat exchange chamber (11), top position fixed mounting has flue gas pipe (4) between support (2) both sides, flue gas pipe (4) top surface position is connected with draught fan (3), flue gas pipe (4) bottom surface position is connected with first ash can (6) that sink, first ash can (6) bottom surface position is connected with the second and sinks ash can (7), ash can (7) bottom surface position is connected with heat exchanger (8) are sunk to the second, heat exchanger (8) inside intermediate position evenly is equipped with a plurality of groups dispersion heat exchange tube (9), heat exchanger (8) bottom surface position is connected with dust remover (10), dust remover (10) top is located support (2) top position and is connected with chimney (5).

2. The active lime calcination energy-saving vertical preheater according to claim 1, wherein a gas inlet pipe (14) and an air inlet pipe (15) are respectively installed on one side surface of the heat exchanger (8), and a heat exchange chamber (11) is fixedly installed on the other side of the heat exchanger (8) and is located at the bottom of one end surface of the support (2).

3. An energy-saving vertical preheater for calcination of activated lime as claimed in claim 2, wherein the heat exchange chamber (11) is provided with a feed inlet (12) and a discharge outlet (13) at the surface positions of both ends.

4. The active lime calcination energy-saving vertical preheater according to claim 1, wherein the flue gas pipe (4), the chimney (5), the first ash settling tank (6), the second ash settling tank (7), the heat exchanger (8), the dust collector (10) and the heat exchange chamber (11) are all connected through a conveying pipe (16).

5. The active lime calcination energy-saving vertical preheater according to claim 1, wherein the dust collector (10) is constituted by a bag-type dust collector.

6. The active lime calcination energy-saving vertical preheater according to claim 1, characterized in that the flue gas duct (4) is constituted by a shaft kiln flue gas duct.

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