Heat tracing structure of lower-section condensate circulating tank of primary cooler

Abstract

The utility model discloses a heat tracing structure of a lower-section condensate circulating tank of a primary cooler, which relates to the technical field of primary coolers and comprises the lower-section condensate circulating tank, an upper three-way valve is mounted at a heat tracing inlet end of the lower-section condensate circulating tank, and a circulating ammonia water pipe and a steam pipeline are respectively arranged on the upper three-way valve. The circulating ammonia water pipe is connected with an ammonia water replacement pipeline of the upper-section condensate circulating tank, a lower three-way valve is mounted at the heat tracing outlet end of the lower-section condensate circulating tank, a steam condensate recovery pipe and an ammonia water recovery pipe are arranged on the lower three-way valve, the steam condensate recovery pipe is connected with a condensate recoverer, and the ammonia water recovery pipe is connected with a mechanical ammonia water clarifying tank; steam heating heat tracing is changed into circulating ammonia water heating heat tracing, the steam consumption is reduced, after the steam consumption is reduced, the corresponding reuse water sewage amount is reduced, the operation load of an ammonia distillation system and a biochemical sewage treatment system can be reduced, and corresponding environmental protection benefits are achieved; and meanwhile, the risk that coal gas condensate enters a steam condensate system after the tracing pipe leaks is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of primary coolers, in particular to a heating structure for a condensate circulation tank in the lower section of a primary cooler. Background Art

[0002] After the raw gas passes through the primary cooler for heat exchange and cooling, components like tar vapor and naphthalene condense to form tar. A certain amount of ammonia, hydrogen sulfide, hydrogen cyanide, and other components in the gas dissolve in the condensate to form condensed ammonia. This mixture of tar and condensed ammonia is called gas condensate. It enters the lower condensate circulation tank, where a portion is recycled to the mechanized ammonia clarifier, while the remaining portion enters the lower section of the primary cooler for circulated spraying to remove adhesive deposits from the primary cooler.

[0003] In order to ensure the fluidity of the sprayed condensate, the temperature of the sprayed liquid in the lower condensate circulation tank must be controlled. At present, the temperature of the lower condensate circulation tank is controlled by indirect heat exchange with high-temperature steam. The steam is transported into the heat exchange tube of the lower condensate circulation tank through a steam pipeline. The condensate circulation tank currently uses steam for heating, which consumes a lot of steam and is costly. In addition, when the coil leaks, the steam condensate and the gas condensate will leak into each other as the pressure of the two media fluctuates, which will not only disrupt the water balance of the wastewater system, burden subsequent wastewater treatment and increase treatment costs, but also cause the gas condensate to leak into the steam condensate system, posing a safety hazard. Utility Model Content

[0004] In order to overcome the defects of high steam consumption cost and high treatment cost caused by mixing (increased wastewater volume) in the prior art, the utility model provides a heating structure for the condensate circulation tank in the lower section of the primary cooler.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a heating structure of the lower section condensate circulation tank of the primary cooler, comprising a lower section condensate circulation tank, an upper three-way valve is installed at the heating inlet end of the lower section condensate circulation tank, a circulating ammonia pipe and a steam pipeline are respectively provided on the upper three-way valve, the circulating ammonia pipe is connected to the ammonia replacement pipeline of the upper section condensate circulation tank, a lower three-way valve is installed at the heating outlet end of the lower section condensate circulation tank, a steam condensate recovery pipe and an ammonia recovery pipe are provided on the lower three-way valve, the steam condensate recovery pipe is connected to the condensate recovery device, the ammonia recovery pipe is connected to the mechanized ammonia clarification tank, and valves are all provided on the circulating ammonia pipe, the steam pipeline, the steam condensate recovery pipe and the ammonia recovery pipe.

[0006] As a further improvement of the present invention, the mechanized ammonia water clarification tank is connected to the ammonia water pipeline of the lower condensate circulation tank.

[0007] As a further improvement of the present invention, the heating inlet and the heating outlet are connected to the internal heat exchange pipeline.

[0008] As a further improvement of the present invention, the heating inlet and the heating outlet are both arranged on the side wall of the same end of the lower section condensate circulation tank.

[0009] Compared with the existing technology, the utility model has the following beneficial effects: after changing from steam heating and tracing to circulating ammonia water heating and tracing, the steam consumption is reduced, which has higher economic benefits; after the steam consumption is reduced, the corresponding reused water and sewage volume will be reduced, which can reduce the operating load of the ammonia steam system and the biochemical sewage treatment system, and has corresponding environmental benefits. At the same time, it eliminates the risk of gas condensate entering the steam condensate system after the heating pipe leaks, and has certain safety benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a structural schematic diagram of a heating structure for a condensate circulation tank in the lower section of a primary cooler according to the present invention.

[0012] In the figure: 1. Lower condensate circulation tank; 2. Upper three-way valve; 3. Lower three-way valve; 4. Heat tracing inlet; 5. Heat tracing outlet; 6. Circulating ammonia pipe; 7. Ammonia replacement pipeline in the upper condensate circulation tank; 8. Steam pipeline; 9. Valve; 10. Steam condensate recovery pipe; 11. Condensate recovery device; 12. Ammonia recovery pipe; 13. Mechanized ammonia clarification tank; 14. Ammonia pipeline in the lower condensate circulation tank. DETAILED DESCRIPTION

[0013] In order to make the technical solution and beneficial effects of the present invention more clearly understood, the present invention will be further described in detail below with reference to specific embodiments.

[0014] Reference Figure 1 The embodiment of the utility model discloses a heating structure for the lower section condensate circulation tank of the primary cooler, comprising a lower section condensate circulation tank 1, an upper three-way valve 2 being installed at the heating inlet end 4 of the lower section condensate circulation tank 1, a circulating ammonia water pipe 6 and a steam pipeline 8 being respectively provided on the upper three-way valve 2, the circulating ammonia water pipe 6 being connected to the ammonia water replacement pipeline 7 of the upper section condensate circulation tank, a lower three-way valve 3 being installed at the heating outlet end 5 of the lower section condensate circulation tank 1, a steam condensate recovery pipe 10 and an ammonia water recovery pipe 12 being provided on the lower three-way valve 3, the steam condensate recovery pipe 10 being connected to a condensate recovery device 11, the ammonia water recovery pipe 12 being connected to a mechanized ammonia water clarification tank 13, and valves 9 being provided on the circulating ammonia water pipe 6, the steam pipeline 8, the steam condensate recovery pipe 10 and the ammonia water recovery pipe 12.

[0015] The mechanized ammonia water clarification tank 13 is connected to the ammonia water pipeline 14 of the lower condensate circulation tank.

[0016] An upper three-way valve 2 is installed at the heating inlet end 4 of the lower condensate circulation tank 1, and a circulating ammonia pipe 6 and a steam pipeline 8 are respectively provided on the upper three-way valve 2. The circulating ammonia pipe 6 is connected to the ammonia replacement pipeline 7 of the upper condensate circulation tank. A lower three-way valve 3 is installed at the heating outlet end 5 of the condensate circulation tank 1, and a steam condensate recovery pipe 10 and an ammonia recovery pipe 12 are provided on the lower three-way valve 3. The steam condensate recovery pipe 10 is connected to the condensate recovery device 11, and the ammonia recovery pipe 12 is connected to the mechanized ammonia clarification tank 13. The heating inlet end 4 and the heating outlet end 5 are connected to the internal heat exchange pipeline, and the heating inlet end 4 and the heating outlet end 5 are both arranged on the side wall of the same end of the lower condensate circulation tank 1.

[0017] Close the valve 15 on the steam pipeline 8 and the steam condensate recovery pipe 10, open the valve 15 on the circulating ammonia water pipe 6 and the ammonia water recovery pipe 12, and change the heating medium of the lower condensate circulation tank 1 from steam to circulating ammonia water. The temperature of the circulating ammonia water in the ammonia water replacement pipeline 7 of the upper condensate circulation tank is about 80°C, which is fully sufficient to heat the condensate at about 30°C-35°C. After the circulating ammonia water completes heat exchange in the lower condensate circulation tank 1, it is recovered to the mechanized ammonia water clarification tank 13, which will not affect the normal operation of the circulating ammonia water system while saving steam consumption.

[0018] After changing from steam heating to circulating ammonia heating, the steam consumption is reduced, which has higher economic benefits. After the steam consumption is reduced, the corresponding reused water wastewater volume will be reduced, which can reduce the operating load of the ammonia steam system and the biochemical wastewater treatment system, and has corresponding environmental benefits. At the same time, it eliminates the hidden danger of gas condensate entering the steam condensate system after the heating pipe leaks, and has certain safety benefits.

[0019] It should be understood that the specific embodiments described herein are only used to understand the present invention and are not used to limit the present invention. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A heating structure for the condensate circulation tank in the lower section of a primary cooler, characterized by: The invention comprises a lower condensate circulation tank (1), an upper three-way valve (2) is installed at the heating inlet end (4) of the lower condensate circulation tank (1), a circulating ammonia water pipe (6) and a steam pipeline (8) are respectively provided on the upper three-way valve (2), the circulating ammonia water pipe (6) is connected to the ammonia water replacement pipeline (7) of the upper condensate circulation tank, a lower three-way valve (3) is installed at the heating outlet end (5) of the lower condensate circulation tank (1), a steam condensate recovery pipe (10) and an ammonia water recovery pipe (12) are provided on the lower three-way valve (3), the steam condensate recovery pipe (10) is connected to a condensate recovery device (11), the ammonia water recovery pipe (12) is connected to a mechanized ammonia water clarification tank (13), and valves (9) are all provided on the circulating ammonia water pipe (6), the steam pipeline (8), the steam condensate recovery pipe (10) and the ammonia water recovery pipe (12).

2. The heating structure of the condensate circulation tank in the lower section of the primary cooler according to claim 1, characterized in that: The mechanized ammonia water clarification tank (13) is connected to the ammonia water pipeline (14) of the lower condensate circulation tank.

3. The heating structure of the condensate circulation tank in the lower section of the primary cooler according to claim 2, characterized in that: The heating inlet end (4) and the heating outlet end (5) are connected to the internal heat exchange pipeline.

4. The heating structure of the condensate circulation tank in the lower section of the primary cooler according to claim 3 is characterized by: The heating inlet end (4) and the heating outlet end (5) are both arranged on the side wall of the same end of the lower section condensate circulation tank (1).

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