Catalytic equilibrium agent high-temperature closed dust remover blowback system

Abstract

The utility model relates to a back flushing system of a catalytic equilibrium agent high-temperature closed dust remover. The back flushing system comprises a three-spinning fine powder recovery tank, a waste agent recovery tank, a first catalyst tank, a second catalyst tank and a non-purification air tank, the tops of the first catalyst tank, the second catalyst tank, the third spinning fine powder recovery tank and the waste agent recovery tank are provided with exhaust ports, and the exhaust ports are provided with high-temperature closed dust removers. The non-purification air tank is connected to high-temperature closed dust removers of the first catalyst tank, the second catalyst tank, the third spinning fine powder recovery tank and the waste agent recovery tank through air pipelines, and valves are arranged on connecting pipelines of exhaust ports of all tank bodies. According to the utility model, the blowback medium of the high-temperature closed dust remover is changed from nitrogen to non-purified air, so that nitrogen is saved, energy consumption is reduced, and the surge tank safety valve can be effectively prevented from starting and jumping.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical production and relates to a catalytic balance agent high-temperature closed dust collector backflush system. Background Art

[0002] The heavy oil catalytic cracking unit adopts high-low parallel catalytic cracking technology, and its main task is to produce high-octane stable gasoline and increase the production of propylene-rich liquefied petroleum gas. The catalyst regeneration of the unit mainly adopts single-stage countercurrent high-efficiency regeneration technology to reduce the residual carbon content of the regenerated catalyst and restore the catalytic activity of the catalyst, while avoiding too harsh regeneration conditions to damage the catalytic activity of the catalyst.

[0003] In normal production of the device, it is necessary to unload the three-spin fine powder once a day and the catalyst from the regenerator once a month. In order to ensure the safety and environmental protection of the unloading process, high-temperature closed dust collectors are added to the three-spin fine powder recovery tank and the waste agent recovery tank. The backflush medium of the existing dust collector is nitrogen, and the nitrogen consumption is large, which affects the economic benefits of the enterprise. The safety valve of the nitrogen pressure regulating tank is set at 0.75MPa, and the pressure of the nitrogen system is controlled between 0.7 and 0.9MPa. When the pressure is higher than 0.75MPa, the nitrogen pressure regulating tank safety valve is prone to tripping accidents. Utility Model Content

[0004] The utility model aims to provide a catalytic balance agent high temperature closed dust collector backflush system, which changes the backflush medium from nitrogen to non-purified air, saves nitrogen, reduces consumption, and avoids the start-up of the safety valve of the pressure regulating tank.

[0005] The technical solution of the utility model is: a catalytic balance agent high temperature closed dust collector backflush system, including a three-spin fine powder recovery tank, a waste agent recovery tank and a non-purified air tank, the tops of the three-spin fine powder recovery tank and the waste agent recovery tank are provided with exhaust ports, and the exhaust ports are provided with a high temperature closed dust collector. The non-purified air tank is connected to the high temperature closed dust collectors of the three-spin fine powder recovery tank and the waste agent recovery tank through an air duct.

[0006] The system is also equipped with catalyst tank No. 1 and catalyst tank No. 2. The tops of catalyst tank No. 1 and catalyst tank No. 2 are equipped with exhaust ports, and the exhaust ports are equipped with high-temperature sealed dust collectors. The non-purified air tank is connected to the high-temperature sealed dust collectors of catalyst tank No. 1 and catalyst tank No. 2 through an air duct.

[0007] The air duct is equipped with valves, and the connecting pipes between the air duct and the high-temperature sealed dust collectors on the three-spinning fine powder recovery tank, the waste agent recovery tank, the No. 1 catalyst tank, and the No. 2 catalyst tank are equipped with valves. The air duct is connected to the nitrogen pipeline, which is equipped with a valve, and the valve of the nitrogen pipeline is equipped with a blind plate. The high-temperature sealed dust collector is a filter dust collector or a bag dust collector.

[0008] The utility model catalytic balance agent high temperature sealed dust collector backflush system is connected to the non-purified air tank through the high temperature sealed dust collector, and the backflush medium of the high temperature sealed dust collector is changed from nitrogen to non-purified air, which is beneficial to saving nitrogen and reducing energy consumption. Because the non-purified air pressure is controlled at about 0.55MPa, the safety valve of the pressure regulating tank can be effectively avoided from tripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the back-flushing system of the high-temperature closed dust collector of the catalytic balance agent of the utility model;

[0010] Figure 2 A schematic diagram of a prior art catalytic balance agent dust collector backflush system;

[0011] Among them: 1—three-spinning fine powder recovery tank, 2—waste agent recovery tank, 3—valve, 4—No. 1 catalyst tank, 5—No. 2 catalyst tank, 6—blind plate, 7—air duct, 8—nitrogen pipeline, 9—non-purified air tank, 10—high-temperature closed dust collector. DETAILED DESCRIPTION

[0012] The utility model is described in detail below with reference to the embodiments and drawings. The protection scope of the utility model is not limited to the embodiments, and any changes made by those skilled in the art within the scope defined by the claims also fall within the protection scope of the utility model.

[0013] The utility model catalytic balance agent high temperature closed dust collector backflush system is as follows Figure 1 As shown, it includes catalyst tank No. 1 4, catalyst tank No. 2 5, three-spinning fine powder recovery tank 1, waste agent recovery tank 2 and non-purified air tank 9. Catalyst tank No. 1, catalyst tank No. 2, three-spinning fine powder recovery tank and waste agent recovery tank are provided with exhaust ports on the top. Each exhaust port is provided with a high-temperature sealed dust collector 10, and the high-temperature sealed dust collector is a filter dust collector. The non-purified air tank is connected to the high-temperature sealed dust collectors of catalyst tank No. 1, catalyst tank No. 2, three-spinning fine powder recovery tank 1 and waste agent recovery tank through an air duct 7. The air duct 7 is connected to the nitrogen duct 8, and a valve 3 is provided on the nitrogen duct 8. A blind plate 6 is installed at the valve of the nitrogen duct, and the nitrogen duct is used as a backup. The air duct is provided with a valve, and a valve is provided on the connecting pipeline between the air duct and the high-temperature sealed dust collector 10 on the three-spinning fine powder recovery tank, the waste agent recovery tank, catalyst tank No. 1 and catalyst tank No. 2.

[0014] The high-temperature dust collectors of catalyst tank No. 1, catalyst tank No. 2, three-spin fine powder recovery tank and waste agent recovery tank can be backblown together or separately to clean the catalyst dust on the high-temperature closed dust collector. Select the three-spin fine powder recovery tank and the waste agent recovery tank for backblowing and cleaning. The operation process is: ① Check the process and dehydrate the non-purified air tank. ② Open the valve on the connecting pipeline between the air duct and the high-temperature closed dust collector of the three-spin fine powder recovery tank 1 and the high-temperature closed dust collector of the waste agent recovery tank 2. ③ Set the parameters of the high-temperature closed dust collector backblowing system and put it into normal use. ④ When the three-spin fine powder or regenerator is unloading the agent, the high-temperature closed dust removal system is automatically controlled to achieve automatic backblowing.

[0015] The catalyst dust is recovered into the three-spin fine powder recovery tank and the waste agent recovery tank through the high-temperature closed dust collector, so that the dust content of the dust collector discharge is reduced to 20mg / m 3 The utility model connects the high-temperature sealed dust collector with the non-purified air tank, changes the back-blowing medium from nitrogen to non-purified air, and saves 1400m3 of nitrogen. 3 / month, with an annual profit of 13,104 yuan. Due to the low pressure of non-purified air, the safety valve is effectively avoided from tripping.

Claims

1. A catalytic balance agent high temperature closed dust collector backflush system, characterized by: The system comprises a three-spin fine powder recovery tank (1), a waste agent recovery tank (2) and a non-purified air tank (9); the tops of the three-spin fine powder recovery tank and the waste agent recovery tank are provided with exhaust ports, and the exhaust ports are provided with a high-temperature sealed dust collector (10); the non-purified air tank (9) is connected to the high-temperature sealed dust collectors of the three-spin fine powder recovery tank and the waste agent recovery tank through an air duct (7).

2. The catalytic balance agent high temperature closed dust collector backflush system according to claim 1 is characterized by: The system is also provided with a No. 1 catalyst tank (4) and a No. 2 catalyst tank (5), wherein the tops of the No. 1 catalyst tank and the No. 2 catalyst tank are provided with exhaust ports, and the exhaust ports are provided with high-temperature sealed dust collectors (10), and the non-purified air tank (9) is connected to the high-temperature sealed dust collectors of the No. 1 catalyst tank and the No. 2 catalyst tank via an air duct (7).

3. The catalytic balance agent high temperature closed dust collector backflush system according to claim 1 or 2, characterized in that: The air duct (7) is provided with a valve (3), and valves are provided on the connecting pipelines of the air duct and the high-temperature sealed dust collectors (10) on the three-spinning fine powder recovery tank (1), the waste agent recovery tank (2), the No. 1 catalyst tank (4) and the No. 2 catalyst tank (5).

4. The catalytic balance agent high temperature closed dust collector backflush system according to claim 3 is characterized by: The air pipeline (7) is connected to a nitrogen pipeline (8), a valve (3) is provided on the nitrogen pipeline, and a blind plate (6) is provided at the valve of the nitrogen pipeline.

5. The catalytic balance agent high temperature closed dust collector backflush system according to claim 3 is characterized by: The high-temperature sealed dust collector is a filter dust collector or a bag dust collector.

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