Coke oven gas total sulfur index adjusting device

Abstract

The utility model relates to a coke oven gas total sulfur index adjusting device, which belongs to the technical field of coke oven gas and comprises a mounting bottom plate, three support frames are fixedly mounted at the top of the mounting bottom plate, and a debenzolization tower, a conversion device and an adjusting component are fixedly mounted on the three support frames respectively. According to the coke oven gas total sulfur index adjusting device, the adjusting assembly is arranged before the input pipe enters the debenzolization tower, two layers of TSA tanks are arranged in the adjusting assembly to adsorb tar and naphthalene and leave sulfur in the coke oven gas, and the two groups of coke oven gas are mixed in the communicating pipe at the output end of the debenzolization tower, so that the total sulfur in the coke oven gas entering the conversion device is greater than 50mg / Nm < 3 >; the problems that the content of tar, naphthalene and total sulfur in coke oven gas at an inlet of the conversion device tends to zero due to large adsorbent filling amount and good adsorption effect, the total sulfur index requirements of a hydrogenation catalyst and a conversion catalyst of the conversion device cannot be met, and safety production risks are brought to operation of the device are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coke oven gas, in particular to a device for adjusting the total sulfur index of coke oven gas. Background Art

[0002] In the process of treating coke oven gas, purification treatment is usually required to remove impurities such as dust and sulfides to ensure the normal operation of subsequent steps. In addition, coke oven gas recovery and desulfurization processes are also required to recover tar and ammonia water and remove acidic gases such as hydrogen sulfide. In order to ensure the stable operation of the conversion device, it is necessary to strictly control the total sulfur, naphthalene and tar content in the inlet coke oven gas to ensure that the hydrogenation catalyst and the conversion catalyst do not undergo reverse sulfurization and cause catalyst deactivation. Therefore, it is necessary to strictly control the naphthalene content to less than 1mg / Nm3, the tar content to less than 1mg / Nm3, and the total sulfur to more than 50mg / Nm3. In particular, the control of the total sulfur content is a necessary condition to ensure the activity and service life of the catalyst, and to prevent the deactivation of the catalyst or shortened service life due to low total sulfur content, which causes the interruption of the production of the device.

[0003] In order to meet the requirements of the conversion device for the impurity content index in coke oven gas, three sets of TSA devices are designed, namely crude naphthalene removal, refined naphthalene removal, and benzene removal. Each set of TSA devices is loaded with different adsorbents (coke, activated carbon) to adsorb impurities in coke oven gas. The crude naphthalene removal for oil removal is loaded with coke and activated carbon, which mainly adsorbs tar and naphthalene in coke oven gas; the refined naphthalene removal is loaded with naphthalene removal activated carbon, which mainly adsorbs naphthalene and benzene in coke oven gas; the benzene removal is loaded with benzene removal activated carbon, which mainly adsorbs benzene in coke oven gas. The three sets of TSA devices are used in series.

[0004] However, three sets of TSA devices are used to adsorb and remove impurities such as tar, naphthalene, and benzene in coke oven gas. Since the content of tar, naphthalene, and benzene in coke oven gas is lower than the design value, the adsorbent loading amount is large and the adsorption effect is good, the tar, naphthalene, and total sulfur content in the coke oven gas at the inlet of the conversion device tends to 0, and the total sulfur index requirements of the hydrogenation catalyst and the conversion catalyst of the conversion device cannot be met, which brings safety risks to the operation of the device. In view of this, the present application proposes a coke oven gas total sulfur index adjustment device. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a device for adjusting the total sulfur index of coke oven gas, which has the advantages of being able to adjust the tar, naphthalene and total sulfur contents in the coke oven gas at the inlet of the conversion device, and solves the problem that the tar, naphthalene and total sulfur contents in the coke oven gas at the inlet of the conversion device tend to zero due to the large adsorbent loading amount and good adsorption effect, and the total sulfur index requirements of the hydrogenation catalyst and the conversion catalyst of the conversion device cannot be met, which brings safety production risks to the operation of the device.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for adjusting the total sulfur index of coke oven gas, comprising a mounting base plate, three support frames are fixedly mounted on the top of the mounting base plate, a debenzene tower, a conversion device and an adjustment component are fixedly mounted on the three support frames respectively, an input pipe is fixedly mounted on the input end of the debenzene tower, a secondary pressure pump for pressurizing the gas in the input pipe is fixedly mounted on the top of the mounting base plate, a branch pipe is fixedly mounted on the surface of the input pipe, the branch pipe is connected to the adjustment component, a connecting pipe is fixedly mounted on the output end of the debenzene tower, the connecting pipe is connected to the conversion device, and a connecting valve is fixedly mounted on one end of the connecting pipe close to the conversion device;

[0007] The regulating assembly includes two layers of TSA tanks fixedly mounted on a support frame, the branch pipes are connected to the input ends of the two layers of TSA tanks, a regulating main pipe is fixedly mounted on the top of the two layers of TSA tanks, the output end of the regulating main pipe is connected to a connecting pipe, a coarse adjustment valve is fixedly mounted on the surface of the regulating main pipe, regulating branch pipes are fixedly mounted at both ends of the regulating main pipe located at the coarse adjustment valve, and a fine adjustment valve is fixedly mounted on the surface of the regulating branch pipe.

[0008] Furthermore, the support frame includes a support plate fixedly mounted on the top of the mounting base plate, a connecting ring fixedly mounted on the top of the support plate, and the connecting ring fixedly mounted on the surface of the debenzene tower, the conversion device and the adjustment component.

[0009] Furthermore, a debenzene TSA is fixedly installed inside the debenzene tower, and a tar adsorption TSA and a naphthalene adsorption TSA are fixedly installed inside the two-layer TSA tank.

[0010] Furthermore, a debenzene sulfur sensor and a mixed sulfur sensor are fixedly mounted on the surface of the connecting pipe. The debenzene sulfur sensor is located between the debenzene tower and the regulating main pipe, and the mixed sulfur sensor is located between the conversion device and the regulating main pipe.

[0011] Furthermore, the tops of the debenzene sulfur-containing sensor and the mixed sulfur-containing sensor are fixedly mounted with wires, and the top of the mounting base is fixedly mounted with a display.

[0012] Furthermore, the debenzene sulfur-containing sensor and the mixed sulfur-containing sensor are electrically connected to a display via a wire, and the display shows the sulfur content values ​​detected by the debenzene sulfur-containing sensor and the mixed sulfur-containing sensor.

[0013] Furthermore, a catalyst inlet is fixedly installed on the top of the conversion device, and an output pipe is fixedly installed on the bottom of the conversion device.

[0014] Compared with the prior art, the utility model provides a device for adjusting the total sulfur index of coke oven gas, which has the following beneficial effects:

[0015] The device for adjusting the total sulfur index of coke oven gas is provided with a regulating component before the input pipe enters the debenzening tower. Two layers of TSA tanks are provided in the regulating component to adsorb tar and naphthalene, leaving sulfur in the coke oven gas. The two groups of coke oven gases are mixed in a connecting pipe at the output end of the debenzening tower, so that the total sulfur in the coke oven gas entering the conversion device is greater than 50 mg / Nm3. This solves the problem that the tar, naphthalene and total sulfur content in the coke oven gas at the inlet of the conversion device tends to zero due to a large amount of adsorbent and good adsorption effect, and the total sulfur index requirements of the hydrogenation catalyst and the conversion catalyst of the conversion device cannot be met, which brings safety risks to the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a front view cross-sectional view of the debenzene tower of the utility model;

[0018] Figure 3 This is a front cross-sectional view of the adjustment component of the utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of the adjustment component and the support frame of the utility model.

[0020] In the figure: 1. Installation base plate; 2. Support frame; 21. Support plate; 22. Connecting ring; 3. Debenzene tower; 31. Debenzene TSA; 4. Conversion device; 5. Adjustment assembly; 51. Two-layer TSA tank; 511. Tar adsorption TSA; 512. Naphthalene adsorption TSA; 52. Adjustment main pipe; 53. Coarse adjustment valve; 54. Adjustment branch pipe; 55. Fine adjustment valve; 6. Input pipe; 7. Secondary pressure pump; 8. Branch pipe; 9. Connecting pipe; 10. Connecting valve; 11. Debenzene sulfur sensor; 12. Mixed sulfur sensor; 13. Wire; 14. Display; 15. Catalyst inlet; 16. Output pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4A device for adjusting the total sulfur index of coke oven gas comprises a mounting base plate 1, three support frames 2 are fixedly mounted on the top of the mounting base plate 1, a debenzene tower 3, a conversion device 4 and an adjustment component 5 are fixedly mounted on the three support frames 2 respectively, an input pipe 6 is fixedly mounted on the input end of the debenzene tower 3, a secondary pressure pump 7 for pressurizing the gas in the input pipe 6 is fixedly mounted on the top of the mounting base plate 1, a branch pipe 8 is fixedly mounted on the surface of the input pipe 6, the branch pipe 8 is connected to the adjustment component 5, a connecting pipe 9 is fixedly mounted on the output end of the debenzene tower 3, the connecting pipe 9 is connected to the conversion device 4, and a connecting valve 10 is fixedly mounted on one end of the connecting pipe 9 close to the conversion device 4.

[0023] Among them, the adjustment component 5 includes a two-layer TSA tank 51 fixedly installed on the support frame 2, the branch pipe 8 is connected to the input end of the two-layer TSA tank 51, an adjustment main pipe 52 is fixedly installed on the top of the two-layer TSA tank 51, the output end of the adjustment main pipe 52 is connected to the connecting pipe 9, a coarse adjustment valve 53 is fixedly installed on the surface of the adjustment main pipe 52, and adjustment branches 54 are fixedly installed at both ends of the coarse adjustment valve 53 of the adjustment main pipe 52, and a fine adjustment valve 55 is fixedly installed on the surface of the adjustment branch pipe 54.

[0024] The coke oven gas is introduced into the debenzene tower 3 to adsorb all the tar, naphthalene and sulfur in the coke oven gas. At this time, the coarse adjustment valve 53 on the regulating main pipe 52 is opened, and the sulfur-containing coke oven gas from which the tar and naphthalene are adsorbed by the two-layer TSA tank 51 is introduced into the connecting pipe 9 to be mixed with the coke oven gas output from the debenzene tower 3, so that the total sulfur in the coke oven gas is greater than 50 mg / Nm3.

[0025] At the same time, the support frame 2 includes a support plate 21 fixedly installed on the top of the installation base plate 1, and a connecting ring 22 is fixedly installed on the top of the support plate 21. The connecting ring 22 is fixedly installed on the surface of the debenzene tower 3, the conversion device 4 and the adjustment component 5.

[0026] Among them, a debenzene TSA 31 is fixedly installed inside the debenzene tower 3, and a tar adsorption TSA 511 and a naphthalene adsorption TSA 512 are fixedly installed inside the two-layer TSA tank 51.

[0027] Secondly, a catalyst inlet 15 is fixedly installed on the top of the conversion device 4 , and an output pipe 16 is fixedly installed on the bottom of the conversion device 4 .

[0028] Embodiment 2: Based on Embodiment 1, a debenzene sulfur-containing sensor 11 and a mixed sulfur-containing sensor 12 are fixedly installed on the surface of the connecting pipe 9. The debenzene sulfur-containing sensor 11 is located between the debenzene tower 3 and the regulating main pipe 52, and the mixed sulfur-containing sensor 12 is located between the conversion device 4 and the regulating main pipe 52.

[0029] The tops of the debenzene sulfur-containing sensor 11 and the mixed sulfur-containing sensor 12 are both fixedly mounted with a lead wire 13 , and the top of the mounting base plate 1 is fixedly mounted with a display 14 .

[0030] Secondly, the debenzene sulfur sensor 11 and the mixed sulfur sensor 12 are electrically connected to the display 14 through the wire 13, and the display 14 displays the sulfur values ​​detected by the debenzene sulfur sensor 11 and the mixed sulfur sensor 12. Due to the initial and final absorption of the debenzene TSA31 inside the debenzene tower 3, the total sulfur content in the coke oven gas passing through the debenzene tower 3 will gradually increase. The total sulfur content in the coke oven gas passing through the debenzene tower 3 is observed by the debenzene sulfur sensor 11, and the coke oven gas content input into the connecting pipe 9 by the regulating component 5 is adjusted so that the total sulfur in the coke oven gas entering the conversion device 4 is greater than 50mg / Nm3, and the sulfur content therein is monitored by the mixed sulfur sensor 12.

[0031] When the present embodiment is in use, at the initial stage of adsorption by the debenzene tower 3, the adsorption effect is significant. After adsorption by the debenzene tower 3, all the total sulfur in the coke oven gas is adsorbed. At this time, the coarse adjustment valve 53 and the fine adjustment valve 55 of the regulating component 5 are opened to allow the coke oven gas adsorbed by the two-layer TSA tank 51 to enter the connecting pipe 9, thereby effectively increasing the total sulfur content in the coke oven gas. With the middle or late stage of adsorption, the adsorption effect of the debenzene tower 3 is reduced, and some organic sulfur will penetrate, which can ensure that the total sulfur content in the coke oven gas reaches 50 mg / Nm3. At this time, the coarse adjustment valve 53 and the fine adjustment valve 55 of the regulating component 5 need to be gradually closed, so as to strictly control the total sulfur index in the coke oven gas entering the conversion device 4.

[0032] The electrical components mentioned in the text are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the text.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for adjusting the total sulfur index of coke oven gas, comprising a mounting base plate (1), characterized in that: Three support frames (2) are fixedly mounted on the top of the installation base plate (1), and a debenzene tower (3), a conversion device (4) and an adjustment component (5) are fixedly mounted on the three support frames (2), respectively; an input pipe (6) is fixedly mounted on the input end of the debenzene tower (3); a secondary pressure pump (7) for pressurizing the coal gas in the input pipe (6) is fixedly mounted on the top of the installation base plate (1); a branch pipe (8) is fixedly mounted on the surface of the input pipe (6), and the branch pipe (8) is connected to the adjustment component (5); a connecting pipe (9) is fixedly mounted on the output end of the debenzene tower (3), and the connecting pipe (9) is connected to the conversion device (4); and a connecting valve (10) is fixedly mounted on one end of the connecting pipe (9) close to the conversion device (4); The regulating assembly (5) comprises a two-layer TSA tank (51) fixedly mounted on a support frame (2); the branch pipe (8) is connected to the input end of the two-layer TSA tank (51); a regulating main pipe (52) is fixedly mounted on the top of the two-layer TSA tank (51); the output end of the regulating main pipe (52) is connected to a connecting pipe (9); a coarse adjustment valve (53) is fixedly mounted on the surface of the regulating main pipe (52); regulating branch pipes (54) are fixedly mounted at both ends of the coarse adjustment valve (53) of the regulating main pipe (52); and a fine adjustment valve (55) is fixedly mounted on the surface of the regulating branch pipe (54).

2. A coke oven gas total sulfur index adjustment device according to claim 1, characterized in that: The support frame (2) comprises a support plate (21) fixedly mounted on the top of the mounting base plate (1); a connecting ring (22) is fixedly mounted on the top of the support plate (21); and the connecting ring (22) is fixedly mounted on the surfaces of the debenzene tower (3), the conversion device (4) and the adjustment component (5).

3. A coke oven gas total sulfur index adjustment device according to claim 1, characterized in that: A debenzene TSA (31) is fixedly installed inside the debenzene tower (3), and a tar adsorption TSA (511) and a naphthalene adsorption TSA (512) are fixedly installed inside the two-layer TSA tank (51).

4. A coke oven gas total sulfur index adjustment device according to claim 1, characterized in that: A debenzene sulfur sensor (11) and a mixed sulfur sensor (12) are fixedly mounted on the surface of the connecting pipe (9); the debenzene sulfur sensor (11) is located between the debenzene tower (3) and the regulating main pipe (52); and the mixed sulfur sensor (12) is located between the conversion device (4) and the regulating main pipe (52).

5. A coke oven gas total sulfur index adjustment device according to claim 4, characterized in that: A wire (13) is fixedly mounted on the top of the debenzene sulfur-containing sensor (11) and the mixed sulfur-containing sensor (12), and a display (14) is fixedly mounted on the top of the mounting base plate (1).

6. A coke oven gas total sulfur index adjustment device according to claim 5, characterized in that: The debenzene sulfur sensor (11) and the mixed sulfur sensor (12) are electrically connected to a display (14) via a wire (13), and the display (14) displays the sulfur values ​​detected by the debenzene sulfur sensor (11) and the mixed sulfur sensor (12).

7. A coke oven gas total sulfur index adjustment device according to claim 1, characterized in that: A catalyst inlet (15) is fixedly installed on the top of the conversion device (4), and an output pipe (16) is fixedly installed on the bottom of the conversion device (4).

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