Catalyst regeneration flue gas harmless treatment device

Abstract

The utility model discloses a catalyst regeneration flue gas harmless treatment device which comprises a separation hopper, wherein an outlet of the separation hopper is connected with one ends of first and fifth valves; the other end of the first valve is connected with one ends of second and ninth valves; the other end of the ninth valve is connected with one end of a fourth valve and an inlet of a first flue gas dechlorination tank; the other end of the second valve is connected with one ends of a seventh valve and a twelfth valve; the other end of the twelfth valve is connected with an outlet of a second flue gas dechlorination tank; the other end of the fifth valve is connected with one end of a sixth valve and one end of an eleventh valve, the other end of the eleventh valve is connected with one end of an eighth valve and an inlet of a second flue gas dechlorination tank, the other end of the sixth valve is connected with one end of a third valve and one end of a tenth valve, and the other end of the tenth valve is connected with an outlet of a first flue gas dechlorination tank; and the other ends of the third and seventh valves are connected with a heating furnace hearth through regulating valves. The two regeneration flue gas dechlorination tanks are used for removing carried harmful substances such as hydrogen chloride and the like, and then the regenerated flue gas is discharged into the hearth of the heating furnace for combustion, so that harmless discharge is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of harmless treatment of flue gas in the petrochemical industry, and in particular to a harmless treatment device for flue gas regenerated by a catalyst. Background Art

[0002] In the petrochemical industry, the flue gas generated in the catalyst regeneration unit of the continuous reforming device during the burning process is adsorbed by the chlorine adsorption section in the separation hopper and then directly discharged into the atmosphere through the chimney. Pollutants such as chlorides carried in the discharged flue gas pose an environmental pollution problem. Summary of the invention

[0003] The purpose of the utility model is to provide a catalyst regeneration flue gas harmless treatment device in view of the defects in the prior art.

[0004] The technical scheme is as follows: a harmless treatment device for catalyst regeneration flue gas comprises a separation hopper and a flue gas dechlorination tank, wherein the input end of the separation hopper is connected to a reforming catalyst regeneration flue gas pipeline, the output end of the separation hopper is connected to one end of a first valve and one end of a fifth valve, the other end of the first valve is connected to one end of a second valve and one end of a ninth valve, the other end of the ninth valve is connected to one end of a fourth valve and an inlet of a first flue gas dechlorination tank, and the other end of the fourth valve is suspended; the other end of the second valve is connected to one end of a seventh valve and one end of a twelfth valve, the other end of the twelfth valve is connected to an outlet of a second flue gas dechlorination tank; the other end of the fifth valve is connected to one end of a sixth valve and one end of an eleventh valve, the other end of the eleventh valve is connected to one end of an eighth valve and an inlet of a second flue gas dechlorination tank, and the other end of the eighth valve is suspended; the other end of the sixth valve is connected to one end of a third valve and one end of a tenth valve, the other end of the tenth valve is connected to the outlet of the first flue gas dechlorination tank; the other end of the third valve and the other end of the seventh valve are both connected to a furnace input pipeline of a heating furnace through a regulating valve.

[0005] Preferably, one end of the second control valve is connected to the pipeline between the regulating valve and the first control valve, the other end of the second control valve is connected to the input pipeline of the blower, the output pipeline of the blower is connected to the furnace input pipeline of the second heating furnace, and a one-way valve is provided at the end of the blower input pipeline.

[0006] Preferably, the first control valve and the second control valve are both ball valves.

[0007] Preferably, the first to twelfth valves are all butterfly valves or ball valves.

[0008] Compared with the prior art, the utility model has the following advantages: reasonable design, simple process flow, easy to manufacture, and it adopts two regeneration flue gas dechlorination tanks to select 4 different operation modes. The catalyst regenerates the flue gas, and after the harmful substances such as hydrogen chloride carried by the regeneration flue gas dechlorination tank are removed, it is discharged into the furnace of the heating furnace for combustion to achieve harmless emission. Moreover, it can implement single tank operation under normal operation of the device, and replace the dechlorination agent when the dechlorination agent is saturated. It has good promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0011] Reference Figure 1 A catalyst regeneration flue gas harmless treatment device comprises a separation hopper and a flue gas dechlorination tank, wherein the input end of the separation hopper 13 is connected to the reforming catalyst regeneration flue gas pipeline 14, the output end of the separation hopper 13 is connected to one end of the first valve 1 and one end of the fifth valve 5, the other end of the first valve 1 is connected to one end of the second valve 2 and one end of the ninth valve 9, the other end of the ninth valve 9 is connected to one end of the fourth valve 4 and the inlet of the first flue gas dechlorination tank 15, and the other end of the fourth valve 4 is suspended; the other end of the second valve 2 is connected to one end of the seventh valve 7 and one end of the twelfth valve 12, the other end of the twelfth valve 12 is connected to one end of the seventh valve 7 and one end of the twelfth valve 12 One end is connected to the outlet of the second flue gas dechlorination tank 16; the other end of the fifth valve 5 is connected to one end of the sixth valve 6 and one end of the eleventh valve 11, the other end of the eleventh valve 11 is connected to one end of the eighth valve 8 and the inlet of the second flue gas dechlorination tank 16, and the other end of the eighth valve 8 is suspended; the other end of the sixth valve 6 is connected to one end of the third valve 3 and one end of the tenth valve 10, and the other end of the tenth valve 10 is connected to the outlet of the first flue gas dechlorination tank 15; the other end of the third valve 3 and the other end of the seventh valve 7 are connected to the furnace input pipeline of the first heating furnace 19 through the regulating valve 17 and the first control valve 18.

[0012] One end of the second control valve 20 is connected to the pipeline between the regulating valve 17 and the first control valve 18, and the other end of the second control valve 20 is connected to the input end pipeline of the blower 22. The output pipeline of the blower 22 is connected to the furnace input pipeline of the second heating furnace 23. A one-way valve 21 is provided at the end of the input end pipeline of the blower 22.

[0013] The first control valve and the second control valve are both ball valves. The first to twelfth valves are all butterfly valves or ball valves.

[0014] The process flow of the utility model is as follows: Working condition 1 (the first flue gas dechlorination tank 15 and the second flue gas dechlorination tank 16 are connected in series) the catalyst regeneration flue gas from the chlorine adsorption zone of the separation hopper 13 enters the first flue gas dechlorination tank 15 through the first valve 1 and the ninth valve 9 for adsorption, enters the second flue gas dechlorination tank 16 through the tenth valve 10, the sixth valve 6, and the eleventh valve 11 for chloride adsorption, and then enters the first heating furnace 19 furnace through the twelfth valve 12 and the seventh valve 7, and then enters the furnace through the regulating valve 17 and the first control valve 18 for combustion to achieve harmless emission. At this time, the valve status is as follows: the regulating valve 17, the first control valve 18, the first valve 1, the sixth valve 6, the seventh valve 7, the ninth valve 9, the tenth valve 10, the eleventh valve 11, and the twelfth valve 12 are in the open state; the second control valve 20, the second valve 2, the third valve 3, the fourth valve 4, the fifth valve 5, and the eighth valve 8 are in the closed state.

[0015] Working condition 2 (the second flue gas dechlorination tank 16 is connected in series with the first flue gas dechlorination tank 15) the catalyst regeneration flue gas from the chlorine adsorption zone of the separation hopper 13 enters the second flue gas dechlorination tank 16 through the fifth valve 5 and the eleventh valve 11 for adsorption, then enters the first flue gas dechlorination tank 15 through the twelfth valve 12, the second valve 2, and the ninth valve 9 for chloride adsorption, and then enters the first flue gas dechlorination tank 15 through the tenth valve 10 and the third valve 3, and then enters the furnace of the first heating furnace 19 through the regulating valve 17 and the first control valve 18 for combustion to achieve harmless emission. At this time, the valve status is as follows: the regulating valve 17, the first control valve 18, the fifth valve 5, the eleventh valve 11, the twelfth valve 12, the second valve 2, the tenth valve 10, the third valve 3, and the ninth valve 9 are in the open state; the second control valve 20, the first valve 1, the fourth valve 4, the sixth valve 6, the seventh valve 7, and the eighth valve 8 are in the closed state.

[0016] Working condition 3 (the first flue gas dechlorination tank 15 is in operation, and the second flue gas dechlorination tank 16 is in standby mode) the catalyst regeneration flue gas from the chlorine adsorption zone of the separation hopper 13 enters the first flue gas dechlorination tank 15 for adsorption through the first valve 1 and the ninth valve 9, passes through the tenth valve 10 and the third valve 3, and then passes through the regulating valve 17 and the first control valve 18 to enter the furnace of the first heating furnace 19 for combustion to achieve harmless emission. At this time, the valve status is as follows: the regulating valve 17, the first control valve 18, the first valve 1, the third valve 3, the ninth valve 9, and the tenth valve 10 are in the open state; the second control valve 20, the second valve 2, the fourth valve 4, the fifth valve 5, the sixth valve 6, the seventh valve 7, the eighth valve 8, the eleventh valve 11, and the twelfth valve 12 are in the closed state.

[0017] Working condition 4 (the second flue gas dechlorination tank 16 is in operation, and the first flue gas dechlorination tank 15 is in standby mode) the catalyst regeneration flue gas from the chlorine adsorption zone of the separation hopper 13 enters the second flue gas dechlorination tank 16 for adsorption through the fifth valve 5 and the eleventh valve 11, passes through the twelfth valve 12 and the seventh valve 7, and then passes through the regulating valve 17 and the first control valve 18 into the furnace of the first heating furnace 19 for combustion to achieve harmless emission. At this time, the valve status is as follows: the regulating valve 17, the first control valve 18, the fifth valve 5, the seventh valve 7, the eleventh valve 11, and the twelfth valve 12 are in the open state; the second control valve 20, the first valve 1, the second valve 2, the third valve 3, the fourth valve 4, the sixth valve 6, the eighth valve 8, the ninth valve 9, and the tenth valve 10 are in the closed state.

[0018] The above four working conditions are all situations where the first heating furnace 19 is used for combustion. If the first heating furnace 19 fails, needs maintenance or other situations occur, the first control valve 18 can be closed, the second control valve 20 can be opened and the blower 22 can be turned on. At this time, the utility model switches to the situation where the second heating furnace 23 is used for combustion; in the situation where the second heating furnace 23 is used for combustion, the working process is similar to the four working conditions where the first heating furnace 19 is used for combustion, except that the first control valve 18 is closed to stop the first heating furnace 19, the second control valve 20 and the blower 22 are turned on, and the flue gas from the left side of the regulating valve 17 is sent to the inlet of the blower 22 after adsorption by the flue gas dechlorination tank, and then mixed with the air in the atmosphere and sent to the furnace of the second heating furnace 23 for harmless treatment; the rest of the working process is the same as the situation where the first heating furnace 19 is used for combustion.

[0019] In summary, the utility model can achieve harmless treatment of flue gas under the premise of stable operation of the catalyst regeneration system of the continuous reforming device. Two regeneration flue gas dechlorination tanks can be used to select 4 different operation modes. The catalyst regeneration flue gas, after passing through the regeneration flue gas dechlorination tank to remove harmful substances such as hydrogen chloride, is discharged into the furnace of the heating furnace for combustion to achieve harmless emission. In addition, single tank operation can be implemented under normal operating conditions of the device, and the dechlorination agent can be replaced when the dechlorination agent is saturated. It has good promotion value.

[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A catalyst regeneration flue gas harmless treatment device, comprising a separation hopper and a flue gas dechlorination tank, characterized in that: The input end of the separation hopper is connected to the pipeline of the reforming catalyst regeneration flue gas, the output end of the separation hopper is connected to one end of the first valve and one end of the fifth valve, the other end of the first valve is connected to one end of the second valve and one end of the ninth valve, the other end of the ninth valve is connected to one end of the fourth valve and the inlet of the first flue gas dechlorination tank, and the other end of the fourth valve is suspended; the other end of the second valve is connected to one end of the seventh valve and one end of the twelfth valve, and the other end of the twelfth valve is connected to the outlet of the second flue gas dechlorination tank; the other end of the fifth valve is connected to one end of the sixth valve and one end of the eleventh valve, the other end of the eleventh valve is connected to one end of the eighth valve and the inlet of the second flue gas dechlorination tank, and the other end of the eighth valve is suspended; the other end of the sixth valve is connected to one end of the third valve and one end of the tenth valve, and the other end of the tenth valve is connected to the outlet of the first flue gas dechlorination tank; the other end of the third valve and the other end of the seventh valve are both connected to the furnace input pipeline of the heating furnace through a regulating valve.

2. A catalyst regeneration flue gas harmless treatment device according to claim 1, characterized in that: One end of the second control valve is connected to the pipeline between the regulating valve and the first control valve, and the other end of the second control valve is connected to the input end pipeline of the blower. The output pipeline of the blower is connected to the furnace input pipeline of the second heating furnace. A one-way valve is provided at the end of the blower input end pipeline.

3. A catalyst regeneration flue gas harmless treatment device according to claim 2, characterized in that: The first control valve and the second control valve are both ball valves.

4. A catalyst regeneration flue gas harmless treatment device according to claim 1, characterized in that: The first to twelfth valves are all butterfly valves or ball valves.

Images