A carbon black tail gas denitrification device

Abstract

The utility model discloses a carbon black tail gas denitration device, including a combustion boiler and a denitration channel; the denitration channel is provided with a smoke inlet pipe, which is correspondingly connected to the combustion boiler, and the carbon black tail gas generated by the combustion boiler enters the denitration channel from the smoke inlet pipe; the denitration channel is provided with a denitration catalytic component, an upper air pre-device, an economizer, a lower air pre-device and a smoke outlet pipe from top to bottom; the denitration catalytic component includes a plurality of denitration catalytic grid units that are evenly spaced from top to bottom. The device is provided with a combustion boiler and a denitration channel that are directly connected, and the carbon black tail gas generated by the combustion boiler directly enters the denitration channel for treatment, and the carbon black tail gas is correspondingly treated with the denitration catalytic component for denitration, and then after being treated with the upper air pre-device, the economizer and the lower air pre-device, it is discharged to the outside of the belt, and the overall device can complete the denitration catalytic treatment of the carbon black tail gas and the heat exchange treatment, and the overall structure is reasonable, which effectively improves the denitration efficiency and quality.

Description

Technical Field

[0001] The utility model relates to burner technical equipment in the technical field of environmental protection, in particular to a carbon black tail gas denitration device. Background Art

[0002] The existing carbon black tail gas treatment technology is to reduce NOx by injecting a suitable reducing agent into the carbon black tail gas after combustion, which mainly includes SNCR technology (non-selective catalytic reduction technology) and SCR technology (selective catalytic reduction technology).

[0003] The former is to mix urea or ammonia with carbon black tail gas at about 900~1100℃ to produce a reduction reaction, and the denitration efficiency can reach about 40~70%, while the latter is to mix ammonia with carbon black tail gas at 300~400℃ and reduce NOx, and its removal efficiency is about 90%. Compared with the in-furnace combustion method, these two technologies have the characteristics of no effect on combustion efficiency, combustion safety and stability, which is the denitration device in the existing technology.

[0004] The specific structure of the existing denitrification device, for example, the "denitrification reaction device" disclosed in the technical scheme of the authorization announcement number: CN 204973924 U, in which the boiler is firstly fed into the denitrification reactor, and denitrification is achieved in the denitrification reactor by a catalyst feeding device for denitrification, and a soot blowing device needs to be appropriately arranged at the upper end of the catalyst storage box for cleaning.

[0005] Although the above technical solution has a good denitrification effect, in the specific soot blowing process, only the dust on the upper end of the catalyst box is blown away, so that the dust is always in a floating state, thereby not affecting the carbon black tail gas passing through the catalyst box. However, soot particles and the like still exist inside the denitrification device, which will seriously affect the denitrification effect and quality over time. The existing technology cannot deal with this problem well.

[0006] Therefore, in order to solve the above problems, it is necessary to develop a denitrification device with a reasonable structure that can improve the denitrification efficiency and denitrification quality. Summary of the invention

[0007] The purpose of the utility model is to provide a carbon black tail gas denitration device to address the deficiencies of the prior art; its technical solution is as follows:

[0008] A carbon black tail gas denitration device comprises a combustion boiler and a denitration channel; the denitration channel is provided with a smoke inlet pipe, the smoke inlet pipe is correspondingly connected to the combustion boiler, and the carbon black tail gas generated by the combustion boiler enters the denitration channel from the smoke inlet pipe;

[0009] The denitration channel is provided with a denitration catalytic component, an upper air preheater, an economizer, a lower air preheater and a smoke outlet pipe from top to bottom; the denitration catalytic component includes a plurality of denitration catalytic grid units that are evenly spaced from top to bottom;

[0010] The denitration catalytic grid unit is correspondingly fixed on the inner wall of the denitration channel, and a mounting seat is also provided on the left side of the denitration channel, on which a plurality of soot blowers corresponding to the positions of the denitration catalytic grid units are provided, and the soot blowing position of the soot blower is located at the upper end surface of each denitration catalytic grid unit;

[0011] An ash collecting trough corresponding to the position of each denitrification catalytic grille unit is arranged on the right side of the denitrification channel; the ash collecting trough is arranged as an L-shaped structure, and the notch is located at the upper end surface of each denitrification catalytic grille unit, corresponding to the position of the soot blower on the left side, and the soot blower on the left side blows the ash particles on the upper end surface of the denitrification catalytic grille unit into the ash collecting trough on the right side.

[0012] Furthermore, a cleaning pump is installed at the lower end of each ash collecting trough, and smoke particles and the like in the ash collecting trough are extracted by the cleaning pump.

[0013] Furthermore, there are four groups of denitration catalytic grille units arranged in total, and each group of denitration catalytic grille units is equipped with a group of soot blowers on the left side, and each group of soot blowers is provided with five soot blowers evenly spaced.

[0014] Furthermore, the width of the ash collecting trough is consistent with the width of the denitrification channel, and a number of evenly spaced partition plates are installed in each ash collecting trough, and the front and rear ends of the partition plates are fixed to the front and rear sides of the ash collecting trough respectively, forming ash falling gaps between adjacent partition plates.

[0015] Furthermore, a spray pipe is installed horizontally through the upper end of each ash collecting trough, and a spray hole is also provided on the spray pipe. The spray hole is downwardly aligned with the bottom of the ash collecting trough, and the dust particles entering the ash collecting trough can be sprayed accordingly through the spray pipe.

[0016] Furthermore, all the upper and lower ash collecting troughs share a corresponding spray pipe, and the spray pipe is arranged in an S-shaped structure from top to bottom, and the spray pipe passes through the upper end position of the ash collecting trough of each layer.

[0017] Beneficial effects: The utility model has the following beneficial effects:

[0018] 1) The device is set to directly connect the combustion boiler with the denitration channel. The carbon black tail gas generated by the combustion boiler directly enters the denitration channel for treatment. The carbon black tail gas is treated by the denitration catalytic component for denitration, and then discharged from the belt after being treated by the upper air preheater, economizer and lower air preheater. The overall device can complete the denitration catalytic treatment of the carbon black tail gas and the heat exchange treatment. The overall structure is reasonable, which effectively improves the denitration efficiency and quality;

[0019] 2) In this device, the denitration catalytic components are specifically processed through the denitration catalytic grid unit, and multiple groups are correspondingly provided to improve the denitration efficiency; in addition, a soot blower is provided to process the smoke on the upper end surface of the denitration catalytic grid unit accordingly to improve work efficiency and quality;

[0020] 3) In this device, an ash collecting trough is also set on the right side of the denitration catalytic grille unit. The soot blower on the left side can blow smoke and dust into the ash collecting trough on the right side, and the smoke and dust are cleaned out by the corresponding ash cleaning pump. After the smoke and dust are eliminated, the denitration efficiency of the denitration catalytic grille unit is effectively improved;

[0021] 4) In the device, the ash collecting tank is also provided with evenly spaced partition plates, which can be used for partitioning and can also prevent the smoke from entering the ash collecting tank from flowing back, thereby improving the smoke treatment efficiency;

[0022] 5) A spray pipe is also provided at the upper end of the ash collecting tank in this device, through which the smoke entering the ash collecting tank can be quickly sprayed and treated, and the smoke will not flow back. The smoke treatment is very rapid, and the smoke mixed liquid can be extracted by the ash cleaning pump. The structure is reasonably set, and the smoke treatment is more reasonable;

[0023] 6) In this installation, the spray pipes of all ash collection troughs are set to share a pipe, which is more stable and simple in structure. The spray pipe is designed as an S-shaped structure to reduce the difficulty of installation and the structure is reasonably set. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the structural diagram of the utility model;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 for Figure 1 Middle BB view;

[0027] Figure 4 for Figure 1 Center C view. DETAILED DESCRIPTION

[0028] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 1 As shown, a carbon black tail gas denitration device comprises a combustion boiler 1 and a denitration channel 2; the denitration channel 2 is provided with a smoke inlet pipe 3, and the smoke inlet pipe 3 is correspondingly connected to the combustion boiler 1, and the carbon black tail gas generated by the combustion boiler 1 enters the denitration channel 2 from the smoke inlet pipe 3;

[0030] The denitration channel 2 is provided with a denitration catalytic component, an upper air preheater 4, an economizer 5, a lower air preheater 6 and a smoke outlet pipe 7 from top to bottom; the denitration catalytic component includes a plurality of denitration catalytic grid units 8 that are evenly spaced from top to bottom;

[0031] The denitration catalytic grid unit 8 is correspondingly fixed on the inner wall of the denitration channel 2, and a mounting seat 21 is also provided on the left side of the denitration channel 2, and a plurality of soot blowers 10 corresponding to the positions of the denitration catalytic grid units 8 are provided on the mounting seat 21, and the soot blowing position of the soot blower 10 is located at the upper end surface of each denitration catalytic grid unit 8;

[0032] like Figure 2 As shown, an ash collecting trough 9 corresponding to the position of each denitration catalytic grille unit 8 is provided on the right side of the denitration channel 2; the ash collecting trough 9 is arranged as an L-shaped structure, and the notch 91 is located on the upper end surface of each denitration catalytic grille unit 8, corresponding to the position of the soot blower 10 on the left side, and the soot blower 10 on the left side blows the ash particles on the upper end surface of the denitration catalytic grille unit 8 into the ash collecting trough 9 on the right side.

[0033] A cleaning pump 11 is also installed at the lower end of each ash collecting trough 9 , and smoke particles and the like in the ash collecting trough 9 are extracted by the cleaning pump 11 .

[0034] like Figure 3 As shown, there are four groups of denitration catalytic grille units 8 arranged in total, and each group of denitration catalytic grille units 8 is equipped with a group of soot blowers 10 on the left side, and each group of soot blowers 10 is correspondingly provided with five soot blowers 10 evenly spaced.

[0035] The width of the ash collecting trough 9 is consistent with the width of the denitrification channel 2, and a plurality of evenly spaced partition plates 12 are installed in each ash collecting trough 9. The front and rear ends of the partition plates 12 are fixed to the front and rear sides of the ash collecting trough 9, and ash falling gaps 13 are formed between adjacent partition plates 12.

[0036] A spray pipe 14 is installed horizontally through the upper end of each ash collecting trough 9, and a spray hole 15 is also provided on the spray pipe 14. The spray hole 15 is downwardly aligned with the bottom of the ash collecting trough 9. The dust particles entering the ash collecting trough 9 can be sprayed accordingly through the spray pipe 14.

[0037] like Figure 4 As shown, all the upper and lower ash collecting troughs 9 share a common spray pipe 14. The spray pipe 14 is arranged in an S-shaped structure from top to bottom, and the spray pipe 14 passes through the upper end position of the ash collecting trough 9 of each layer.

[0038] The specific working principle of this device is as follows: the smoke inlet pipe of the denitrification channel in this device is directly connected to the combustion boiler, and the carbon black exhaust gas generated by the combustion boiler directly enters the denitrification channel. A number of groups of denitrification catalytic grid units with even upper and lower intervals are arranged in the denitrification channel. The denitrification catalytic grid units are all grid-type structures with denitrification catalysts arranged inside, which can denitrify the carbon black exhaust gas; basically, after being treated by multiple layers of denitrification catalytic grid units, the nitrogen oxides in the carbon black exhaust gas are basically removed, and then they are treated by heat exchange through the upper air pre-heater, economizer and lower air pre-heater, and then discharged from the smoke outlet pipe to complete the whole process.

[0039] In the above process, soot blowing treatment is also required; when the carbon black exhaust gas passes through each denitrification catalytic grille unit, the smoke particles in the carbon black exhaust gas will be blocked outside by the grille accordingly. If it is not treated, it will seriously affect the treatment effect of the carbon black exhaust gas.

[0040] In the prior art, soot blowing technology is mostly used for treatment. In the present device, a plurality of soot blowers are arranged in the mounting seat on the left side, which can clean the dust accumulated on the upper end surface of the denitration catalytic grille unit; at the same time, in the present device, an ash collecting trough is arranged at the corresponding position of each denitration catalytic grille unit on the right side. The ash collecting trough is an L-shaped structure, and the notch is just aligned with the upper end surface of the denitration catalytic grille unit, corresponding to the position of the soot blower on the left side. The smoke particles blown up by the soot blower on the left side are directly blown into the ash collecting trough on the right side, thereby clearing the dust on the upper end surface of the denitration catalytic grille unit accordingly, without affecting the treatment effect of the carbon black exhaust gas.

[0041] The dust entering the ash collecting trough is sucked out by the cleaning pump for further treatment. During the smoke suction process, when a lot of smoke accumulates, the machine can be stopped for extraction treatment to prevent the extraction of a large amount of carbon black tail gas.

[0042] In addition, this device also provides a number of evenly spaced partitions in the ash collecting trough, the main function of which is to prevent the smoke and dust entering the ash collecting trough from being stirred by the airflow and re-entering the denitrification channel to produce denitrification effects; and it also facilitates the accumulation of smoke and dust in different areas.

[0043] In this device, a horizontally penetrating spray pipe is also arranged at the upper end of each ash collecting trough. The spray pipe is provided with downward spray holes. Water can be sprayed directly into the ash collecting trough through the spray pipe. The smoke dust is blown to the ash collecting trough on the right through the soot blower on the left. After being sprayed through the spray pipe, it directly falls into the ash collecting trough and is then extracted by the cleaning pump accordingly. The smoke dust can be removed more efficiently, and the smoke dust will not repeatedly enter the denitrification channel, which can effectively improve the denitrification efficiency and quality.

[0044] The above-mentioned specific implementation mode is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A carbon black tail gas denitrification device, characterized in that: It comprises a combustion boiler (1) and a denitration channel (2); the denitration channel (2) is provided with a smoke inlet pipe (3), the smoke inlet pipe (3) is correspondingly connected to the combustion boiler (1), and the carbon black tail gas generated by the combustion boiler (1) enters the denitration channel (2) through the smoke inlet pipe (3); The denitration channel (2) is provided with a denitration catalytic component, an upper air preheater (4), an economizer (5), a lower air preheater (6) and a smoke outlet pipe (7) from top to bottom; the denitration catalytic component includes a plurality of denitration catalytic grid units (8) that are evenly spaced from top to bottom; The denitration catalytic grid unit (8) is fixed correspondingly to the inner wall of the denitration channel (2), and a mounting seat (21) is also provided on the left side of the denitration channel (2), and a plurality of soot blowers (10) corresponding to the positions of the denitration catalytic grid units (8) are provided on the mounting seat (21), and the soot blowing position of the soot blowers (10) is located at the upper end surface of each denitration catalytic grid unit (8); An ash collecting trough (9) corresponding to the position of each denitration catalytic grille unit (8) is arranged on the right side of the denitration channel (2); the ash collecting trough (9) is arranged in an L-shaped structure, and a notch (91) is located on the upper end surface of each denitration catalytic grille unit (8), corresponding to the position of the soot blower (10) on the left side, and the soot blower (10) on the left side blows the soot particles on the upper end surface of the denitration catalytic grille unit (8) into the ash collecting trough (9) on the right side.

2. A carbon black tail gas denitrification device according to claim 1, characterized in that: A cleaning pump (11) is also installed at the lower end of each ash collecting trough (9), and smoke particles in the ash collecting trough (9) are extracted by the cleaning pump (11).

3. A carbon black tail gas denitrification device according to claim 1, characterized in that: The denitration catalytic grille units (8) are provided in four groups in total, and each group of denitration catalytic grille units (8) is provided with a group of soot blowers (10) on the left side thereof, and each group of soot blowers (10) is provided with five soot blowers (10) at even intervals.

4. A carbon black tail gas denitrification device according to claim 2, characterized in that: The width of the ash collecting trough (9) is consistent with the width of the denitrification channel (2), and a plurality of evenly spaced partition plates (12) are correspondingly installed in each ash collecting trough (9), and the front and rear ends of the partition plates (12) are correspondingly fixed to the front and rear sides of the ash collecting trough (9), and ash falling gaps (13) are formed between adjacent partition plates (12).

5. A carbon black tail gas denitrification device according to claim 2, characterized in that: A spray pipe (14) is installed to penetrate the upper end of each ash collecting trough (9) in a horizontal direction. The spray pipe (14) is also provided with a spray hole (15). The spray hole (15) is downwardly directed toward the bottom of the ash collecting trough (9). The dust particles entering the ash collecting trough (9) can be sprayed accordingly through the spray pipe (14).

6. A carbon black tail gas denitrification device according to claim 5, characterized in that: All upper and lower ash collecting troughs (9) share a common spray pipe (14), and the spray pipe (14) is arranged in an S-shaped structure from top to bottom. The spray pipe (14) passes through the upper end position of the ash collecting trough (9) of each layer.

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