Cooling and dust removing integrated device for coke discharging and dust removing process system

Abstract

The invention discloses a cooling and dust removing integrated device for a coke discharging and dust removing process system. Which comprises a bag filter and a cooling circulation system (7), and is characterized in that the bag filter is a top vertical air inlet type bag filter, and the cooling circulation system (7) is embedded outside a vertical air inlet flue (10) of the bag filter to form an integrated device. The problems of frequent fluctuation, high flue gas temperature and sparks of coke discharge flue gas are solved, the spark catcher, the cooler and the bag filter are organically combined together to form an integrated device, and the integrated device has the advantages of being simple in structure, beneficial to extinguishing the sparks, low in resistance and small in system occupied area, and can be suitable for the field of coke discharge dust removal flue gas treatment.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial flue gas treatment, and in particular relates to an integrated cooling and dust removal device for a coke removal dust removal process system. Background Art

[0002] The dust removal flue gas of coke oven comes from the smoke generated in the coke oven production process, mainly the smoke vents on the top of the furnace and the smoke generated in the coke quenching process.

[0003] Smoke dust has the characteristics of intermittent emission, high flue gas temperature, and sparks in the flue gas, which has always been a difficult point in pollution control in the coking industry.

[0004] In the traditional flue gas dust removal process, a cooler and a spark catcher need to be separately installed in front of the bag filter to cool the high-temperature flue gas and capture sparks in the smoke to prevent bag burning.

[0005] However, the above-mentioned whole set of process equipment is numerous and complex, occupies a large area and has high resistance, resulting in high project construction cost and high operating cost. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an integrated cooling and dust removal device for a coke removal dust removal process system.

[0007] The technical solution of the present invention is: an integrated cooling and dust removal device for a coke removal dust removal process system, including a bag filter and a cooling circulation system. The bag filter is a top vertical air inlet type bag filter, and the cooling circulation system is embedded in the outside of the vertical air inlet flue of the bag filter to form an integrated device.

[0008] Furthermore, the top vertical air inlet type bag filter includes a column frame, an ash hopper, a filter chamber, filter bags and bag cages, an internal flue guide plate, an upper box body and a blowing device, a clean air chamber, a chamber offline valve, and an air inlet flue; the column frame and the ash hopper are arranged at the lower part of the filter chamber, the filter chamber is provided with filter bags and bag cages, and the internal flue guide plate is arranged in the middle of the filter chamber; the clean air chamber is arranged at the upper part of the filter chamber, and the air inlet flue is vertically arranged in the middle of the clean air chamber; the clean air chamber is provided with an upper box body and a blowing device; the air inlet flue is connected to the internal flue guide plate, and the cooling circulation system is embedded in the outside of the air inlet flue in the clean air chamber; the cooling circulation system includes a circulating cooling water interlayer, an internal insulation layer, an external insulation layer, and a cooling plate; the cooling plate is installed inside the air inlet flue.

[0009] Furthermore, the cooling plate is connected to the clean air chamber through the circulating cooling water interlayer, and welding is adopted between the cooling plate, the circulating cooling water interlayer and the clean air chamber.

[0010] Furthermore, an internal heat insulation layer and an external heat insulation layer are arranged inside and outside the circulating cooling water interlayer, and the internal heat insulation layer and the external heat insulation layer are made of rock wool or castable material.

[0011] Furthermore, the cooling plate is a group of stainless steel plates arranged vertically, and there is cooling water in the circulating cooling water interlayer, and the cooling water is soft water.

[0012] Furthermore, the cooling circulation system is connected to a circulating water volume control system, and the circulating water volume control system is interlocked with the bag filter inlet flue gas temperature and the clean air chamber flue gas temperature.

[0013] Furthermore, the circulating water volume control system includes a variable frequency pump, a thermocouple thermometer, and a workstation machine.

[0014] Furthermore, a chamber offline valve is provided on the air inlet flue.

[0015] The invention discloses an integrated cooling and dust removal device for a coke-discharging and dust-removing process system. When the coke oven is discharging coke, high-temperature flue gas is generated and the coke-discharging and dust-removing fan runs at a high speed. At this time, the variable frequency pump is interlocked to start the cooling circulation system to effectively reduce the flue gas temperature.

[0016] When the coke oven stops discharging coke, the flue gas temperature is low, the coke discharge dust removal fan runs at a low speed, and cooling is no longer required, so the cooling circulation system stops working.

[0017] The cooling plate is set in the flue, and both ends extend into the circulating cooling water interlayer. The cooling water can quickly take away the heat absorbed by the cooling plate to achieve rapid cooling. At the same time, it helps to extinguish sparks entrained in the flue gas to prevent sparks from burning the bag.

[0018] The cooling plate is arranged vertically in the flue to improve the uniformity of the flue gas and fully cool down the high-temperature flue gas.

[0019] The cooling plate is made of stainless steel and can quickly absorb the heat of high-temperature flue gas.

[0020] The circulating cooling water interlayer is connected to the cooling plate. The cooling water can quickly take away the heat from the cooling plate, cool down the flue gas, and at the same time help extinguish sparks in the flue gas to prevent sparks from burning the bag.

[0021] The cooling system is equipped with a circulating cooling water interlayer, and an insulation layer is arranged inside and outside the interlayer. The insulation material prevents the circulating cooling water from exchanging heat with the flue gas, thereby preventing corrosion of the inner wall of the flue and dust compaction.

[0022] The circulating water volume control system is equipped with a variable frequency pump, which is interlocked with the inlet flue gas temperature of the dust removal system and the flue gas temperature of the clean air chamber to achieve coordinated control with the coking process.

[0023] This device overcomes the problems of frequent fluctuations in coking flue gas, high flue gas temperature and sparks. It organically combines the spark arrester, cooler and bag filter to form an integrated device. It has the advantages of simple structure, helps to extinguish sparks, low resistance and small system footprint. It can be applied to the field of coking dust removal flue gas treatment.

[0024] The beneficial technical effects of the present invention are as follows: 1. A cooling and dust removal integrated device is proposed for the dust removal process of the flue gas discharged from the coke oven. Compared with the traditional dust removal process system, the original cooler and spark arrester are cancelled. The device embeds the cooling plate into the flue of the vertical air inlet bag filter, organically combines the spark arrester, cooler and bag filter together to form an integrated device, thereby reducing the footprint of the system; 2. The cooling and dust removal integrated device is provided with a cooling circulation system in the inlet vertical flue, wherein a circulating cooling water interlayer is provided in the system, and heat insulation materials are provided inside and outside the interlayer. The heat insulation materials prevent the circulating cooling water from exchanging heat with the flue gas, thereby preventing the inner wall of the flue from being corroded and the dust from being condensed; 3. The cooling plate is arranged in the flue, and both ends extend into the circulating cooling water interlayer. The cooling water can quickly take away the heat absorbed by the cooling plate, thereby realizing rapid cooling, and at the same time can help extinguish the sparks entrained in the flue gas, thereby preventing the sparks from burning the bag; 4. The cooling plate is arranged vertically in the flue, thereby improving the uniformity of the flue gas, thereby fully cooling the high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an elevation view of an integrated cooling and dust removal device for a coke removal dust removal process system.

[0026] Figure 2 It is a schematic diagram of the cooling cycle system design.

[0027] Figure 3 It is a schematic diagram of the design of the circulating water control system.

[0028] In the figure: 1 column frame, 2 ash hopper, 3 filter chamber, 4 filter bag and bag cage, 5 internal flue guide plate, 6 upper box and blowing device, 7, cooling circulation system, 7.1 cooling plate, 7.2 internal insulation layer, 7.3 circulating cooling water interlayer, 7.4 external insulation layer, 8 clean air chamber, 9 chamber offline valve, 10 air inlet flue, 11 circulating water volume control system, 12 variable frequency pump, 13 workstation machine. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings of the specification. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] A cooling and dust removal integrated device for a coke removal process system comprises a bag filter and a cooling circulation system 7. The bag filter is a top vertical air inlet type bag filter. The cooling circulation system 7 is embedded outside the vertical air inlet flue 10 of the bag filter to form an integrated device.

[0031] The top vertical air inlet type bag filter includes a column frame 1, an ash hopper 2, a filter chamber 3, a filter bag and a bag cage 4, an internal flue guide plate 5, an upper box body and a spray device 6, a clean air chamber 8, a chamber offline valve 9, and an air inlet flue 10; the column frame 1 and the ash hopper 2 are arranged at the lower part of the filter chamber 3, the filter bag and the bag cage 4 are arranged in the filter chamber 3, and the internal flue guide plate 5 is arranged in the middle of the filter chamber 3; the clean air chamber 8 is arranged at the upper part of the filter chamber 3, and the air inlet flue 10 is vertically arranged in the middle of the clean air chamber 8; the clean air chamber 8 is provided with an upper box body and a spray device 6; the air inlet flue 10 is communicated with the internal flue guide plate 5, and the cooling circulation system 7 is embedded in the outside of the air inlet flue 10 in the clean air chamber 8; the cooling circulation system 7 includes a circulating cooling water interlayer 7.3, an internal heat insulation layer 7.2, an external heat insulation layer 7.4, and a cooling plate 7.1; the cooling plate is installed in the air inlet flue 10.

[0032] The cooling plate 7.1 passes through the circulating cooling water interlayer 7.3 and is connected to the clean air chamber 8. The cooling plate 7.1, the circulating cooling water interlayer 7.3 and the clean air chamber 8 are welded to ensure that the weld is tight and leak-proof.

[0033] The cooling plate 7.1 is a group of stainless steel plates arranged vertically. The circulating cooling water interlayer 7.3 contains cooling water, which is soft water.

[0034] An internal insulation layer 7.2 and an external insulation layer 7.4 are arranged inside and outside the circulating cooling water interlayer 7.3. The internal insulation layer 7.2 and the external insulation layer 7.4 are made of rock wool or castable material to avoid heat exchange between the circulating cooling water and the high-temperature flue gas in the flue, and to prevent corrosion of the inner wall of the flue and dust compaction.

[0035] The circulating water volume control system 12, a thermocouple thermometer, and a workstation machine 13 are composed.

[0036] The circulating water control system 11 is interlocked with the inlet flue gas temperature of the dust removal system and the flue gas temperature of the clean air chamber to achieve coordinated control with the coke discharge process. When the coke oven is discharging coke, high-temperature flue gas is generated, and the coke discharge dust removal fan runs at high speed. At this time, the variable frequency pump is interlocked to start the cooling circulation system to effectively reduce the flue gas temperature. When the coke oven stops discharging coke, the flue gas temperature is low, the coke discharge dust removal fan runs at a low speed, and no cooling is required, and the cooling circulation system stops working.

Claims

1. A cooling and dust removal integrated device for a coke removal dust removal process system, comprising a bag filter, a cooling circulation system (7), Its characteristics are The bag filter is a top vertical air inlet type bag filter, and the cooling circulation system (7) is embedded outside the vertical air inlet flue (10) of the bag filter to form an integrated device.

2. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 1, Its characteristics are The top vertical air inlet type bag filter comprises a column frame (1), an ash hopper (2), a filter chamber (3), a filter bag and a bag cage (4), an internal flue guide plate (5), an upper box body and a blowing device (6), a clean air chamber (8), a chamber offline valve (9), and an air inlet flue (10); the column frame (1) and the ash hopper (2) are arranged at the lower part of the filter chamber (3); the filter bag and the bag cage (4) are arranged in the filter chamber (3); the internal flue guide plate (5) is arranged in the middle part of the filter chamber (3); the clean air chamber (8) is arranged at the upper part of the filter chamber (3); ), an air inlet duct (10) is vertically arranged in the middle of the clean air chamber (8); an upper box body and a blowing device (6) are arranged inside the clean air chamber (8); the air inlet duct (10) is communicated with an internal flue guide plate (5); the cooling circulation system (7) is embedded outside the air inlet duct (10) in the clean air chamber (8); the cooling circulation system (7) comprises a circulating cooling water interlayer (7.3), an internal heat insulation layer (7.2), an external heat insulation layer (7.4), and a cooling plate (7.1); the cooling plate is installed inside the air inlet duct (10).

3. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 2, Its characteristics are The cooling plate (7.1) passes through the circulating cooling water interlayer (7.3) and is connected to the clean air chamber (8); welding is used between the cooling plate (7.1), the circulating cooling water interlayer (7.3) and the clean air chamber (8).

4. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 2, Its characteristics are An internal heat insulation layer (7.2) and an external heat insulation layer (7.4) are arranged inside and outside the circulating cooling water interlayer (7.3), and the internal heat insulation layer (7.2) and the external heat insulation layer (7.4) are made of rock wool or castable material.

5. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 2, Its characteristics are The cooling plate (7.1) is a group of stainless steel plates arranged vertically. The circulating cooling water interlayer (7.3) contains cooling water, which is soft water.

6. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 1, Its characteristics are The cooling circulation system (7) is connected to a circulating water volume control system (11), and the circulating water volume control system (11) is interlocked with the smoke temperature at the bag filter inlet and the smoke temperature at the clean air chamber (8).

7. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 6, Its characteristics are The circulating water volume control system (11) comprises a variable frequency pump (12), a thermocouple thermometer, and a workstation (13).

8. The cooling and dust removal integrated device for the coke removal dust removal process system according to claim 2, Its characteristics are The air inlet flue (10) is provided with a chamber offline valve (9).

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