Surface cooling system for high-temperature flue gas dust removal process

Abstract

The utility model discloses a surface cooling system in a high-temperature flue gas dust removal process, which comprises a plurality of groups of reverse surface coolers and a plurality of groups of forward surface coolers, and air outlets of the plurality of groups of reverse surface coolers and the plurality of forward surface coolers are fixedly communicated with an air outlet pipeline I, an air outlet pipeline II and an air outlet pipeline III respectively; according to the flue gas cooling and dust collecting system and the temperature control method, a flue gas conveying and connecting line, the flue gas flowing direction and the flue gas cooling area are conveniently changed and adjusted, so that the flue gas temperature meets the process requirement, and production interruption caused by the fact that a cloth bag is burnt out due to the fact that flue gas is too low and dews or too high is avoided; the forward surface cooler and the reverse surface cooler are connected through the three groups of bidirectional adjusting coolers to form a closed-loop system, the bidirectional adjusting coolers are designed to be increased or decreased according to needs, the bidirectional adjusting coolers are respectively connected with the corresponding gas outlet pipelines, and the flowing direction of flue gas can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the industrial ventilation field technical field, concretely is surface cooling system of high temperature flue gas dust removal process. BACKGROUND

[0002] The rotary kiln can efficiently process a large amount of material through the rotary calcination mode, and is widely used in the building materials, metallurgy, chemical industry and other industries. Its structure is advanced, and the combined scale sealing design at both ends reduces air leakage, thereby reducing radiant heat loss and improving energy efficiency. In addition, the rotary kiln also has significant application in the metallurgical industry, mainly used for heat treatment and smelting process of steel, non-ferrous metal and ferroalloy, showing wide market value and application prospect.

[0003] The treatment of high-temperature flue gas generated in the rotary kiln production process generally uses pulse dust collector, electric dust collector, water film dust removal and other methods. The pulse dust collector has high dust collection efficiency and small investment, and the selection of pulse dust collector for dust removal is the most, and the pulse dust collector is the most widely used dust removal equipment, and its advantage is high dust collection efficiency, which can reach more than 99.1%, and it is the most commonly used equipment to meet the ultra-low standard emission requirements of environmental protection regulations. The pulse dust collector needs to meet the highest temperature resistance requirement of the dust removal bag.

[0004] However, the traditional high-temperature flue gas dust removal has the following shortcomings:

[0005] Generally, the method of mixing cold air device is adopted in industry, and cold air is mixed when the temperature is too high to reduce the flue gas temperature and meet the highest temperature resistance requirement of the dust removal bag, but it is easy to increase the air intake, cause problems such as fan, pipeline, airflow running stability and production running stability, etc. When the flue gas temperature is too low, especially in the initial stage of production line startup and the end of production stop, and in the unstable process running in the middle, this problem is easy to appear, which leads to condensation in the pulse dust collector, affects the air permeability of the dust removal bag, and even causes the dust removal bag to be blocked and invalid, resulting in huge direct and indirect economic losses. There is no effective solution to the problem of too low flue gas temperature, and the general method is to install a bypass pipeline, and when the temperature is low, the flue gas is discharged into the desulfurization facility through the bypass pipeline, which is easy to cause environmental problems such as particulate matter exceeding the standard. SUMMARY

[0006] The utility model discloses a surface cooling system of high temperature flue gas dust removal process can solve the problem that the temperature is too high when the method of adopting the cold air mixing device in industry, and the flue gas temperature is reduced, and the highest temperature resistance requirement of dust removal cloth bag is satisfied, but the problem of increasing the air intake, causing the blower, pipeline, airflow operation stability and production operation stability and multiple aspects is easy to appear, when the flue gas temperature is too low, especially in the initial stage of production line start and the end of production stop, and the running process is unstable, this problem is easy to appear, causes the dewing in the pulse dust collector, influences the air permeability of dust removal cloth bag, even leads to the dust removal cloth bag to be blocked and fails and stops production, causes the huge direct and indirect economic loss, and the flue gas temperature is too low, and currently there is no effective solution, and the general method is to set up and install a bypass pipeline, and the flue gas is discharged into the desulfurization facility through the bypass pipeline when the temperature is low, and the problem of causing the particulate matter to exceed the standard and the environmental protection problem.

[0007] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A surface cooling system of high temperature flue gas dust removal process, including several groups of reverse surface cooler and several groups of forward surface cooler, the outlet of several groups of reverse surface cooler and several forward surface coolers are fixedly connected with outlet pipeline one, outlet pipeline two and outlet pipeline three, one end of several groups of reverse surface cooler is connected with herringbone connecting pipeline, the surface of several groups of forward surface cooler is connected with forward herringbone pipeline, and several groups of forward surface cooler are connected with dust collecting chamber cooling water tank through forward herringbone pipeline.

[0009] As a preferred technical scheme of the utility model, the middle part of outlet pipeline one, the middle part of outlet pipeline two and the middle part of outlet pipeline three are fixedly installed with outlet pipeline valve.

[0010] As a preferred technical scheme of the utility model, one end of several groups of forward surface cooler away from the temperature detector and the surface of several groups of reverse surface cooler are connected with the stock bin, and the connecting place of stock bin and forward surface cooler and the connecting place of stock bin and reverse surface cooler are fixedly installed with stock bin valve.

[0011] As a preferred technical scheme of the utility model, the middle part of herringbone connecting pipeline and the middle part of forward herringbone pipeline are fixedly installed with herringbone pipeline valve.

[0012] As a preferred technical scheme of the utility model, the bottom end between several groups of reverse surface cooler and several groups of forward surface cooler is equipped with pulse dust collector, and the bottom end of outlet pipeline one, the bottom end of outlet pipeline two and the bottom end of outlet pipeline three are connected with pulse dust collector.

[0013] As a preferred technical scheme of the utility model, the plurality of groups of reverse surface coolers are connected in series by a plurality of reverse surface coolers, and the plurality of groups of forward surface coolers are connected in series by a plurality of forward surface coolers.

[0014] As a preferred technical scheme of the utility model, the plurality of groups of reverse surface coolers and the plurality of groups of forward surface coolers are connected with the first bidirectional adjusting cooler through the air outlet pipeline one, the plurality of groups of reverse surface coolers and the plurality of groups of forward surface coolers are connected with the second bidirectional adjusting cooler through the air outlet pipeline two, and the plurality of groups of reverse surface coolers and the plurality of groups of forward surface coolers are connected with the third bidirectional adjusting cooler through the air outlet pipeline three.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1. The flue gas cooling and dust collecting system of the utility model is convenient to change and adjust the flue gas conveying connection line and the direction of flue gas flow, adjust the flue gas cooling area, so that the flue gas temperature reaches the process requirement, avoids that the flue gas is too low to dew or too high to burn the cloth bag, and leads to production interruption.

[0017] 2. The forward surface cooler and the reverse surface cooler of the utility model are connected through three groups of bidirectional adjusting coolers and become a closed loop system, the bidirectional adjusting coolers are designed according to the need, the bidirectional adjusting coolers are connected with the corresponding air outlet pipeline, and then connected with the air inlet of the pulse dust collector, so that the adjustment is flexible, the conditions for realizing flexible switching and simultaneous use of forward flow and reverse flow are created, the high-temperature flue gas temperature is adjustable, and the flue gas flow direction is adjustable. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view of the cooling and dust collecting system of the utility model;

[0019] Figure 2 It is the plan view of the cooling and dust collecting system of the utility model;

[0020] Figure 3 It is the left view of the cooling and dust collecting system of the utility model;

[0021] Figure 4 It is the front view of the pulse dust collector component connection of the utility model;

[0022] Figure 5 It is the plan view of the pulse dust collector component connection of the utility model;

[0023] Figure 6 It is the left view of the pulse dust collector component connection of the utility model;

[0024] Figure 7The utility model discloses a kiln head part connection main view,

[0025] Figure 8 The utility model discloses a temperature control flow chart for using.

[0026] In the drawing: 1, reverse surface cooler, 2, forward surface cooler, 3, air outlet pipeline one, 4, air outlet pipeline two, 5, air outlet pipeline three, 6, herringbone connecting pipeline, 7, forward herringbone pipeline, 8, dust collecting chamber cooling water tank, 9, air outlet pipeline valve, 10, temperature measuring instrument, 11, stock bin valve, 12, herringbone pipeline valve, 13, stock bin, 14, pulse dust collector, 15, first two-way adjusting cooler, 16, second two-way adjusting cooler, 17, third two-way adjusting cooler. DETAILED DESCRIPTION

[0027] The utility model discloses an embodiment will be combined with the utility model embodiment, the technical scheme in the utility model embodiment of the utility model embodiment is clearly and completely described, obviously, the embodiment described only is a part embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art obtains without making the creative labor belong to the range of protection of the utility model.

[0028] Please refer to Figures 1-7 The utility model provides a kind of surface cooling system of high-temperature flue gas dust removal process, including several groups of reverse surface cooler 1 and several groups of forward surface cooler 2, the air outlet of several groups of reverse surface cooler 1 and several forward surface coolers 2 are fixedly connected with air outlet pipeline one 3, air outlet pipeline two 4 and air outlet pipeline three 5 respectively, one end of several groups of reverse surface cooler 1 is connected with herringbone connecting pipeline 6, the surface of several groups of forward surface cooler 2 is connected with forward herringbone pipeline 7, and several groups of forward surface cooler 2 are connected with dust collecting chamber cooling water tank 8 by forward herringbone pipeline 7, and one end of forward surface cooler 2 is equipped with temperature measuring instrument 10.

[0029] The middle part of air outlet pipeline one 3, the middle part of air outlet pipeline two 4, the middle part of air outlet pipeline three 5 are fixedly installed with air outlet pipeline valve 9.

[0030] The end of several groups of forward surface cooler 2 away from temperature measuring instrument 10 and the surface of several groups of reverse surface cooler 1 are connected with stock bin 13, and the connecting place of stock bin 13 and forward surface cooler 2 and the connecting place of stock bin 13 and reverse surface cooler 1 are fixedly installed with stock bin valve 11.

[0031] The middle part of herringbone connecting pipeline 6 and the middle part of forward herringbone pipeline 7 are fixedly installed with herringbone pipeline valve 12.

[0032] The bottom end between the several groups of reverse surface coolers 1 and the several forward surface coolers 2 is provided with a pulse dust collector 14, the bottom end of the air outlet pipeline one 3, the bottom end of the air outlet pipeline two 4 and the bottom end of the air outlet pipeline three 5 are connected with the pulse dust collector 14.

[0033] The several groups of reverse surface coolers 1 are composed of a plurality of reverse surface coolers 1 in series, and the several groups of forward surface coolers 2 are composed of a plurality of forward surface coolers 2 in series.

[0034] The several groups of reverse surface coolers 1 and the several forward surface coolers 2 are connected with the first bidirectional adjusting cooler 15 through the air outlet pipeline one 3, the second bidirectional adjusting cooler 16 through the air outlet pipeline two 4 and the third bidirectional adjusting cooler 17 through the air outlet pipeline three 5.

[0035] Referring to Figure 8 The temperature control steps of the utility model are as follows:

[0036] Step one, establishing a cooling system: the forward surface cooler 2, the first bidirectional adjusting cooler 15, the second bidirectional adjusting cooler 16, the third bidirectional adjusting cooler 17, the air outlet pipeline one 3, the air outlet pipeline two 4, the air outlet pipeline three 5, the reverse surface cooler 1, the stock bin 13, the temperature measuring instrument 10, the stock bin valve 11, the herringbone pipeline valve 12, the air outlet pipeline valve 9, the pulse dust collector 14 constitute a cooling system;

[0037] Step two, controlling the flow direction of flue gas: controlling the number of herringbone surface coolers that high-temperature flue gas passes through, controlling the first bidirectional adjusting cooler 15, the second bidirectional adjusting cooler 16, the third bidirectional adjusting cooler 17, the air outlet pipeline one 3, the air outlet pipeline two 4, the air outlet pipeline three 5 and the pulse dust collector 14 connection lines and the direction of flue gas flow;

[0038] Step three, controlling the flue gas cooling area: adjusting the length and number of surface coolers that flue gas passes through, thereby adjusting the flue gas cooling area, so that the flue gas temperature entering the pulse dust collector 14 reaches the process requirement.

[0039] The utility model discloses a kind of for calcination production process, need to use coal gas or natural gas heating calcination, the connecting sleeve ring of dismounting kiln head combustion chamber and temperature-resistant connecting pipeline and the connecting sleeve ring of flue gas collection pipeline, using external force moves kiln head combustion chamber, kiln head combustion chamber travels to specified position along track, install detachable burner in flue gas collection pipeline, open the herringbone pipeline valve 12 of first two-way adjusting cooler 15, open the gas outlet pipeline valve 9 of gas outlet pipeline one 3, close the gas outlet pipeline valve 9 of gas outlet pipeline two 4, gas outlet pipeline three 5, close the bunker valve 11 of bunker 13 between first two-way adjusting cooler 15 and second two-way adjusting cooler 16, open the bunker valve 11 of remaining reverse surface cooler 1 lower bunker 13, close the herringbone pipeline valve 12 of remaining all reverse surface cooler 1, start rotary kiln kiln body, after rotary kiln kiln body rotation is normal, start pulse dust collector 14, start induced draft fan, open coal gas or natural gas valve, ignite detachable burner, under the action of induced draft fan, flue gas flow flows into rotary kiln kiln body, then in turn flows into kiln tail box, kiln tail herringbone connecting pipeline 6, the bunker 13 under reverse surface cooler 1, flue gas in turn sequentially passes through remaining bunker 13, first two-way adjusting cooler 15, gas outlet pipeline one 3, flue gas again enters pulse dust collector 14 from the gas inlet of pulse dust collector 14 and is filtered into pure gas, is conveyed through induced draft fan and is discharged into desulfurization and tail gas treatment system from pure gas pipeline;Increase burner flame temperature, in rotary kiln kiln body, when rotary kiln kiln body inner wall temperature reaches requirement, start feeding operation from the feeding pipe, raw material sequentially enters kiln tail preheating cylinder, rotary kiln kiln body, kiln head section cooling cylinder calcination from the feeding pipe, while starting blower, carry out waste heat collection and participate in kiln tail preheating cylinder and preheating of material in kiln, flame and flue gas are opposite to the flowing direction of material, raw material is gradually calcined, flue gas flows in the direction, temperature monitor 10 monitors flue gas temperature, according to temperature condition decides cooling area, opens the herringbone pipeline valve 12 of reverse surface cooler 1 of the corresponding number of cooling area that needs to be increased, if cooling area is not enough to cool flue gas to the temperature that meets the requirement, then continue to sequentially use second two-way adjusting cooler 16 and gas outlet pipeline two 4, third two-way adjusting cooler 17 and gas outlet pipeline three 5, open corresponding herringbone pipeline valve 12, close corresponding bunker valve 11, until the flue gas temperature requirement of pulse dust collector 14 is reached;According to the need of temperature regulation, decide first two-way adjusting cooler 15 and gas outlet pipeline one 3, second two-way adjusting cooler 16 and gas outlet pipeline two 4, third two-way adjusting cooler 17 and gas outlet pipeline three 5 single or multiple open or close or opening degree, then further meet the flue gas of temperature requirement enters the gas inlet of pulse dust collector 14, calcined product is discharged from kiln head, is conveyed to next process, this process is reverse production process.

[0040] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A surface cooling system for a high-temperature flue gas dedusting process, comprising several groups of counter-flow surface coolers (1) and several groups of forward-flow surface coolers (2), characterized in that: The air outlet of each group of the reverse surface cooler (1) and the air outlet of each group of the forward surface cooler (2) are fixedly connected with air outlet pipeline one (3), air outlet pipeline two (4) and air outlet pipeline three (5) respectively, one end of each group of the reverse surface cooler (1) is connected with a herringbone connecting pipeline (6), the surface of each group of the forward surface cooler (2) is connected with a forward herringbone pipeline (7), each group of the forward surface cooler (2) is connected with a dust collecting chamber cooling water tank (8) through the forward herringbone pipeline (7), and one end of the forward surface cooler (2) is provided with a temperature measuring instrument (10).

2. A surface cooling system for a high temperature flue gas dedusting process according to claim 1, characterized in that: The middle part of the air outlet pipeline one (3), the middle part of the air outlet pipeline two (4) and the middle part of the air outlet pipeline three (5) are fixedly provided with air outlet pipeline valves (9).

3. A surface cooling system for a high temperature flue gas dedusting process according to claim 1, characterized in that: The end of each group of the forward surface cooler (2) away from the temperature measuring instrument (10) and the surface of each group of the reverse surface cooler (1) are connected with a material bin (13), and the connection between the material bin (13) and the forward surface cooler (2) and the connection between the material bin (13) and the reverse surface cooler (1) are fixedly provided with material bin valves (11).

4. A surface cooling system for a high temperature flue gas dedusting process according to claim 1, characterized in that: The middle part of the herringbone connecting pipeline (6) and the middle part of the forward herringbone pipeline (7) are fixedly provided with herringbone pipeline valves (12).

5. A surface cooling system for a high temperature flue gas dedusting process according to claim 1, characterized in that: The bottom end between each group of the reverse surface cooler (1) and each group of the forward surface cooler (2) is provided with a pulse dust collector (14), and the bottom end of the air outlet pipeline one (3), the bottom end of the air outlet pipeline two (4) and the bottom end of the air outlet pipeline three (5) are connected with the pulse dust collector (14).

6. A surface cooling system for a high temperature flue gas dedusting process according to claim 1, characterized in that: Each group of the reverse surface cooler (1) is composed of a plurality of reverse surface coolers (1) connected in series, and each group of the forward surface cooler (2) is composed of a plurality of forward surface coolers (2) connected in series.

7. A surface cooling system for a high temperature flue gas dedusting process according to claim 1, characterized in that: Each group of the reverse surface cooler (1) and each group of the forward surface cooler (2) are connected with a first bidirectional adjusting cooler (15) through the air outlet pipeline one (3), each group of the reverse surface cooler (1) and each group of the forward surface cooler (2) are connected with a second bidirectional adjusting cooler (16) through the air outlet pipeline two (4), and each group of the reverse surface cooler (1) and each group of the forward surface cooler (2) are connected with a third bidirectional adjusting cooler (17) through the air outlet pipeline three (5).

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