A gasification furnace drying steam extraction steam recovery energy-saving device

Abstract

A gasifier oven extraction steam recovery energy-saving device includes a gasifier, a steam extractor and a steam condenser. The gasifier includes a gasifier body, a nitrogen inlet pipe, a natural gas inlet pipe, an air inlet pipe, a slag discharge pipe, an overflow pipe, an extraction inlet and a quenching ring water inlet; the steam extractor includes an extractor body, an extraction inlet pipe, an extraction steam inlet pipe and an extraction steam outlet pipe; the steam condenser includes a condenser body, a non-condensable gas vent pipe, a cooling water inlet pipe, a cooling water outlet pipe and a liquid collecting tank. The steam inlet of the condenser body is connected to the other end of the steam outlet pipe, the cooling water inlet is connected to the cooling water inlet pipe, the cooling water outlet is connected to the cooling water outlet pipe, the non-condensable gas outlet is connected to the non-condensable gas vent pipe, and the condensed water outlet is connected to the liquid collecting tank. The liquid collecting tank is used to collect condensed water. The new device can recycle the originally vented steam for reuse, avoid wasting resources, reduce production costs, and prevent noise pollution to the environment.

Description

Technical Field

[0001] The utility model relates to the technical field related to gasifiers, and in particular to a gasifier oven extraction steam recovery energy-saving device. Background Art

[0002] Before the gasifier is put into normal operation, it is necessary to inject steam with a steam pressure of 1.3 MPa (G) and a temperature of 220°C into the steam exhauster to form a pressure of ≯ (not greater than) 150 mm H 2 O vacuum state, and then ignite the natural gas to mix with the inhaled air to burn, gradually increase the temperature in the gasifier to the coal slurry ignition temperature of about 1200℃, and then inject water-coal slurry and oxygen to enter the normal production state.

[0003] When the jet steam gasifier is evacuated, a large amount of steam is consumed, resulting in a waste of resources and increased consumption costs. At the same time, the steam venting will also cause noise pollution to the environment. Utility Model Content

[0004] Technical problems to be solved: In view of the problems existing in the prior art, the present invention proposes a gasification furnace drying furnace extraction steam recovery energy-saving device, which can recover and reuse the originally vented steam, avoid waste of resources, reduce production costs, and prevent noise pollution to the environment.

[0005] Technical solution: A gasifier drying furnace extraction steam recovery energy-saving device, comprising a gasifier, a steam extractor and a steam condenser, the gasifier comprising a gasifier body, a nitrogen inlet pipe, a natural gas inlet pipe, an air inlet pipe, a slag discharge pipe, an overflow pipe, an extraction inlet and a quenching ring water inlet, the nitrogen inlet pipe is arranged at one side of the bottom of the gasifier body, the natural gas inlet pipe and the air inlet pipe are arranged at the top of the gasifier body, the slag discharge pipe is arranged at the bottom of the gasifier body, the overflow pipe is arranged at the other side of the bottom of the gasifier body, the extraction inlet is arranged at the gas outlet on one side of the middle of the gasifier body, the quenching ring water inlet is arranged at one side of the middle of the gasifier body and at the bottom of the gas outlet, and the quenching ring water inlet is connected to quenching water;

[0006] The steam vacuum extractor comprises a vacuum extractor body, a vacuum inlet pipe, a vacuum steam inlet pipe and a vacuum steam outlet pipe, wherein the vacuum inlet pipe is respectively connected to the vacuum inlet and the vacuum inlet of the vacuum extractor body, one end of the vacuum steam inlet pipe is connected to the vacuum steam inlet of the vacuum extractor body, and the other end is connected to the steam source, and one end of the vacuum steam outlet pipe is connected to the vacuum steam outlet of the vacuum extractor body;

[0007] The steam condenser comprises a condenser body, a non-condensable gas vent pipe, a cooling water inlet pipe, a cooling water outlet pipe and a liquid collecting tank. The condenser body is provided with a steam inlet, a cooling water inlet, a cooling water outlet, a non-condensable gas outlet and a condensed water outlet. The steam inlet is connected to the other end of the steam outlet pipe, the cooling water inlet is connected to the cooling water inlet pipe, the cooling water outlet is connected to the cooling water outlet pipe, the non-condensable gas outlet is connected to the non-condensable gas vent pipe, and the condensed water outlet is connected to the liquid collecting tank. The liquid collecting tank is used to collect condensed water.

[0008] Preferably, the gasifier drying furnace extraction steam recovery energy-saving device also includes a slag pool, which is arranged at the bottom of the gasifier, the slag discharge pipe slag outlet and the overflow pipe water outlet are arranged on the upper part of the slag pool, and a slag pool water inlet pipe is provided on one side of the bottom of the slag pool.

[0009] Preferably, a slag pool water inlet valve is provided on the slag pool water inlet pipe.

[0010] Preferably, the gasification furnace drying steam extraction and energy-saving device also includes a preheating water pump, a preheating water pump inlet pipe and a preheating water pump outlet pipe. A water outlet is provided on one side of the bottom of the slag pool. The preheating water pump inlet pipe is respectively connected to the preheating water pump inlet and the slag pool outlet, and the preheating water pump outlet pipe is respectively connected to the preheating water pump outlet and the quenching ring inlet.

[0011] Preferably, a control valve is provided on the preheating water pump inlet pipe and the preheating water pump outlet pipe respectively.

[0012] Preferably, the liquid collecting tank includes a condensate pump, a condensate pump inlet pipe and a condensate pump outlet pipe, the condensate pump inlet pipe is respectively connected to the condensate pump water inlet and the liquid collecting tank outlet, and the condensate pump outlet pipe is respectively connected to the condensate pump outlet and the recovery system.

[0013] Preferably, the condensate water pump inlet pipe and the condensate water pump outlet pipe are respectively provided with a condensate water pump inlet valve and a condensate water pump outlet valve.

[0014] Preferably, the liquid collecting tank comprises a liquid level gauge, which is arranged at one side of the bottom of the liquid collecting tank and is used to display the liquid level in the liquid collecting tank.

[0015] Preferably, the liquid collecting tank comprises a thermometer, which is arranged on one side of the top of the liquid collecting tank and is used to display the temperature in the liquid collecting tank.

[0016] Preferably, the nitrogen inlet pipe, natural gas inlet pipe, air inlet pipe, slag discharge pipe, overflow pipe, extraction inlet pipe, extraction steam inlet pipe and extraction steam outlet pipe, cooling water outlet pipe, cooling water inlet pipe and non-condensable gas vent pipe are provided with control valves.

[0017] Beneficial effects: The device provided by the utility model is reasonably designed. The gasifier drying furnace extraction steam recovery energy-saving device can recover and reuse the originally vented steam when the gasifier is vacuumed by the steam exhauster during the preheating process of the gasifier, thereby avoiding waste of resources, reducing production costs, and preventing noise pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a gasification furnace drying steam extraction and recovery energy-saving device of the utility model;

[0019] The numbers in the figure represent the following: gasifier 1, nitrogen inlet pipe 2, natural gas inlet pipe 3, air inlet pipe 4, slag pool 5, slag pool water inlet valve 6, slag discharge pipe 7, overflow pipe 8, preheating water pump 9, preheating water pump inlet pipe 10, preheating water pump outlet pipe 11, steam vacuum pump 12, extraction steam inlet pipe 13, extraction inlet pipe 14, extraction steam outlet pipe 15, steam condenser 16, non-condensable gas vent pipe 17, cooling water inlet pipe 18, cooling water outlet pipe 19, collecting tank 20, liquid level meter 21, thermometer 22, condensate pump 23, condensate pump inlet valve 24, condensate pump outlet valve 25. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Unless otherwise specified, the components used in the embodiments of this specification are all from common commercially available products, wherein the gasifier is a Texaco coal gasifier; the steam condenser is a shell and tube condenser, with cooling water flowing through the tube side and steam and condensed water flowing through the shell side. Example 1

[0022] A gasifier furnace drying steam extraction steam recovery energy saving device, see Figure 1 , including a gasifier 1, a steam exhauster 12 and a steam condenser 16. The gasifier 1 includes a gasifier body, a nitrogen inlet pipe 2, a natural gas inlet pipe 3, an air inlet pipe 4, a slag discharge pipe 7, an overflow pipe 8, an extraction inlet and a quenching ring water inlet. The nitrogen inlet pipe 2 is arranged at one side of the bottom of the gasifier body, the natural gas inlet pipe 3 and the air inlet pipe 4 are arranged at the top of the gasifier body, the slag discharge pipe 7 is arranged at the bottom of the gasifier body, the overflow pipe 8 is arranged at the other side of the bottom of the gasifier body, the extraction inlet is arranged at the outlet on one side of the middle part of the gasifier body, the quenching ring water inlet is arranged at one side of the middle part of the gasifier body and at the bottom of the outlet, and the quenching ring water inlet is connected to quenching water.

[0023] The steam extractor 12 includes an extractor body, an extraction inlet pipe 14, an extraction steam inlet pipe 13 and an extraction steam outlet pipe 15. The extraction inlet pipe 14 is respectively connected to the extraction inlet and the extraction air inlet of the extractor body. One end of the extraction steam inlet pipe 13 is connected to the extraction steam inlet of the extractor body, and the other end is connected to the steam source. One end of the extraction steam outlet pipe 15 is connected to the extraction steam outlet of the extractor body.

[0024] The steam condenser 16 includes a condenser body, a non-condensable gas vent pipe 17, a cooling water inlet pipe 18, a cooling water outlet pipe 19 and a liquid collecting tank 20. The condenser body is provided with a steam inlet, a cooling water inlet, a cooling water outlet, a non-condensable gas outlet and a condensed water outlet. The steam inlet is connected to the other end of the steam outlet pipe 15, the cooling water inlet is connected to the cooling water inlet pipe 18, the cooling water outlet is connected to the cooling water outlet pipe 19, the non-condensable gas outlet is connected to the non-condensable gas vent pipe 17, and the condensed water outlet is connected to the liquid collecting tank 20. The liquid collecting tank 20 is used to collect condensed water. Example 2

[0025] A gasifier furnace drying steam extraction steam recovery energy saving device, see Figure 1 , including a gasifier 1, a slag pool 5, a preheating water pump 9, a preheating water pump inlet pipe 10, a preheating water pump outlet pipe 11, a steam exhauster 12 and a steam condenser 16. The gasifier 1 includes a gasifier body, a nitrogen inlet pipe 2, a natural gas inlet pipe 3, an air inlet pipe 4, a slag discharge pipe 7, an overflow pipe 8, an extraction inlet and a quenching ring water inlet. The nitrogen inlet pipe 2 is arranged at one side of the bottom of the gasifier body, the natural gas inlet pipe 3 and the air inlet pipe 4 are arranged at the top of the gasifier body, the slag discharge pipe 7 is arranged at the bottom of the gasifier body, the overflow pipe 8 is arranged at the other side of the bottom of the gasifier body, the extraction inlet is arranged at the outlet on one side of the middle part of the gasifier body, the quenching ring water inlet is arranged at one side of the middle part of the gasifier body and at the bottom of the outlet, and the quenching ring water inlet is connected to quenching water.

[0026] The slag pool 5 is arranged at the bottom of the gasifier 1, the slag outlet of the slag discharge pipe 7 and the water outlet of the overflow pipe 8 are arranged at the upper part of the slag pool 5, and a slag pool water inlet pipe is arranged at one side of the bottom of the slag pool 5. A slag pool water inlet valve 6 is arranged on the slag pool water inlet pipe.

[0027] A water outlet is provided at one side of the bottom of the slag pool 5, and the preheating water pump inlet pipe 10 is respectively connected to the water inlet of the preheating water pump 9 and the water outlet of the slag pool 5, and the preheating water pump outlet pipe 11 is respectively connected to the water outlet of the preheating water pump 9 and the water inlet of the quenching ring. Control valves are respectively provided on the preheating water pump inlet pipe 10 and the preheating water pump outlet pipe 11.

[0028] The steam extractor 12 includes an extractor body, an extraction inlet pipe 14, an extraction steam inlet pipe 13 and an extraction steam outlet pipe 15. The extraction inlet pipe 14 is respectively connected to the extraction inlet and the extraction air inlet of the extractor body. One end of the extraction steam inlet pipe 13 is connected to the extraction steam inlet of the extractor body, and the other end is connected to the steam source. One end of the extraction steam outlet pipe 15 is connected to the extraction steam outlet of the extractor body.

[0029] The steam condenser 16 includes a condenser body, a non-condensable gas vent pipe 17, a cooling water inlet pipe 18, a cooling water outlet pipe 19 and a liquid collecting tank 20. The condenser body is provided with a steam inlet, a cooling water inlet, a cooling water outlet, a non-condensable gas outlet and a condensed water outlet. The steam inlet is connected to the other end of the extraction steam outlet pipe 15, the cooling water inlet is connected to the cooling water inlet pipe 18, the cooling water outlet is connected to the cooling water outlet pipe 19, the non-condensable gas outlet is connected to the non-condensable gas vent pipe 17, and the condensed water outlet is connected to the liquid collecting tank 20. The liquid collecting tank 20 is used to collect condensed water.

[0030] The liquid collecting tank 20 includes a liquid level meter 21, a thermometer 22, a condensate pump 23, a condensate pump inlet pipe and a condensate pump outlet pipe. The condensate pump inlet pipe is connected to the condensate pump inlet and the water outlet of the liquid collecting tank 20 respectively, and the condensate pump outlet pipe is connected to the condensate pump outlet and the recovery system respectively. The condensate pump inlet pipe and the condensate pump outlet pipe are respectively provided with a condensate pump inlet valve 24 and a condensate pump outlet valve 25. The liquid level meter 21 is arranged at one side of the bottom of the liquid collecting tank 20, and is used to display the liquid level in the liquid collecting tank 20. The thermometer 22 is arranged at one side of the top of the liquid collecting tank 20, and is used to display the temperature in the liquid collecting tank 20.

[0031] Control valves are provided on the nitrogen inlet pipe 2, the natural gas inlet pipe 3, the air inlet pipe 4, the slag discharge pipe 7, the overflow pipe 8, the extraction inlet pipe 14, the extraction steam inlet pipe 13 and the extraction steam outlet pipe 15, the cooling water outlet pipe 19, the cooling water inlet pipe 18 and the non-condensable gas vent pipe 17.

[0032] The method of using the above-mentioned gasification furnace drying steam extraction and recovery energy-saving device is as follows: open the control valves on the slag discharge pipe 7 and the overflow pipe 8, open the slag pool water inlet valve 6, control the liquid level of the slag pool 5 to about 50%, open the inlet and outlet valves upstream and downstream of the preheating water pump 9, and then start the preheating water pump 9, start the preheating water pump 9 and adjust the flow rate at 180 m³ / h or so, enters the quenching ring in the quenching chamber inside the gasifier 1 through the quenching ring water inlet, and the preheated water from the quenching water ring flows to the slag pool 5 by means of the high head difference through the overflow pipe 8, and the liquid level of the gasifier 1 is controlled at about 70% through the overflow pipe 8. The uninterrupted water circulation of the preheated water protects the quenching water ring in the gasifier 1, and the control valve on the nitrogen inlet pipe 2 is opened to replace the combustible gas content in the gasifier <0.5%, and then the control valve on the extraction steam inlet pipe 13 is opened, the control valve on the extraction inlet pipe 14 and the extraction steam outlet pipe 15 are opened, and the control valves on the non-condensable gas vent pipe 17, the cooling water outlet pipe 19 and the cooling water inlet pipe 18 on the steam condenser 16 are opened, and the extraction gas volume is controlled by the steam volume to maintain a suitable negative pressure (10-30 mm H 2 O) and keep it stable, ignite the preheating burner, adjust the natural gas volume, adjust the opening of the air door and the amount of extracted steam through the control valves on the natural gas inlet pipe 3, the air inlet pipe 4 and the extraction inlet pipe 14, and gradually increase the temperature according to the gasifier heating rate requirements. Open the condensate pump inlet valve 24 and the condensate pump outlet valve 25, the condensate pump 23 is in standby state, the liquid level gauge 21 and the thermometer 22 in the liquid collecting tank 20 are put into normal operation, open the control valve on the extraction steam outlet pipe 15 to allow steam to enter the steam condenser 16, and the non-condensable gas is vented through the non-condensable gas vent pipe 17. The steam condenses into water and enters the liquid collecting tank 20. When the liquid level of the liquid collecting tank 20 is about 80%, start the condensate pump 23 to send it to the recovery system for reuse.

[0033] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned implementation modes, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned implementation modes, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation modes of the utility model.

Claims

1. A gasification furnace drying steam extraction steam recovery energy-saving device, characterized in that: It comprises a gasifier (1), a steam extractor (12) and a steam condenser (16), The gasifier (1) comprises a gasifier body, a nitrogen inlet pipe (2), a natural gas inlet pipe (3), an air inlet pipe (4), a slag discharge pipe (7), an overflow pipe (8), an extraction inlet and a quenching ring water inlet, wherein the nitrogen inlet pipe (2) is arranged at one side of the bottom of the gasifier body, the natural gas inlet pipe (3) and the air inlet pipe (4) are arranged at the top of the gasifier body, the slag discharge pipe (7) is arranged at the bottom end of the gasifier body, the overflow pipe (8) is arranged at the other side of the bottom of the gasifier body, the extraction inlet is arranged at the gas outlet on one side of the middle of the gasifier body, the quenching ring water inlet is arranged at one side of the middle of the gasifier body and at the bottom of the gas outlet, and the quenching ring water inlet is connected to quenching water; The steam vacuum extractor (12) comprises a vacuum extractor body, a vacuum inlet pipe (14), a vacuum steam inlet pipe (13) and a vacuum steam outlet pipe (15); the vacuum inlet pipe (14) is respectively connected to the vacuum inlet and the vacuum inlet of the vacuum extractor body; one end of the vacuum steam inlet pipe (13) is connected to the vacuum steam inlet of the vacuum extractor body and the other end is connected to the steam source; one end of the vacuum steam outlet pipe (15) is connected to the vacuum steam outlet of the vacuum extractor body; The steam condenser (16) comprises a condenser body, a non-condensable gas vent pipe (17), a cooling water inlet pipe (18), a cooling water outlet pipe (19) and a liquid collecting tank (20). The condenser body is provided with a steam inlet, a cooling water inlet, a cooling water outlet, a non-condensable gas outlet and a condensed water outlet. The steam inlet is connected to the other end of the extraction steam outlet pipe (15), the cooling water inlet is connected to the cooling water inlet pipe (18), the cooling water outlet is connected to the cooling water outlet pipe (19), the non-condensable gas outlet is connected to the non-condensable gas vent pipe (17), and the condensed water outlet is connected to the liquid collecting tank (20). The liquid collecting tank (20) is used to collect condensed water.

2. The gasification furnace drying extraction steam recovery energy-saving device according to claim 1 is characterized in that: The gasifier drying furnace extraction steam recovery energy-saving device further comprises a slag pool (5), wherein the slag pool (5) is arranged at the bottom of the gasifier (1), a slag outlet of a slag discharge pipe (7) and a water outlet of an overflow pipe (8) are arranged at the upper part of the slag pool (5), and a slag pool water inlet pipe is arranged at one side of the bottom of the slag pool (5).

3. The gasification furnace drying extraction steam recovery energy-saving device according to claim 2 is characterized in that: A slag pool water inlet valve (6) is provided on the slag pool water inlet pipe.

4. The gasification furnace drying extraction steam recovery energy-saving device according to claim 2 is characterized in that: The gasifier drying furnace extraction steam recovery energy-saving device also includes a preheating water pump (9), a preheating water pump inlet pipe (10) and a preheating water pump outlet pipe (11); a water outlet is provided on one side of the bottom of the slag pool (5); the preheating water pump inlet pipe (10) is respectively connected to the water inlet of the preheating water pump (9) and the water outlet of the slag pool (5); and the preheating water pump outlet pipe (11) is respectively connected to the water outlet of the preheating water pump (9) and the water inlet of the quenching ring.

5. The gasification furnace drying extraction steam recovery energy-saving device according to claim 4 is characterized in that: The preheating water pump inlet pipe (10) and the preheating water pump outlet pipe (11) are respectively provided with control valves.

6. The gasification furnace drying extraction steam recovery energy-saving device according to claim 1 is characterized in that: The liquid collecting tank (20) comprises a condensate pump (23), a condensate pump inlet pipe and a condensate pump outlet pipe, the condensate pump inlet pipe is respectively connected to a condensate pump water inlet and a water outlet of the liquid collecting tank (20), and the condensate pump outlet pipe is respectively connected to a condensate pump water outlet and a recovery system.

7. A gasification furnace drying extraction steam recovery energy-saving device according to claim 6, characterized in that: The condensate water pump inlet pipe and the condensate water pump outlet pipe are respectively provided with a condensate water pump inlet valve (24) and a condensate water pump outlet valve (25).

8. The gasification furnace drying extraction steam recovery energy-saving device according to claim 1 is characterized in that: The liquid collecting tank (20) comprises a liquid level meter (21), which is arranged at one side of the bottom of the liquid collecting tank (20) and is used to display the liquid level in the liquid collecting tank (20).

9. The gasification furnace drying extraction steam recovery energy-saving device according to claim 1, characterized in that: The liquid collecting tank (20) comprises a thermometer (22), which is arranged on one side of the top of the liquid collecting tank (20) and is used to display the temperature in the liquid collecting tank (20).

10. The gasification furnace drying extraction steam recovery energy-saving device according to claim 1, characterized in that: Control valves are provided on the nitrogen inlet pipe (2), the natural gas inlet pipe (3), the air inlet pipe (4), the slag discharge pipe (7), the overflow pipe (8), the extraction inlet pipe (14), the extraction steam inlet pipe (13), the extraction steam outlet pipe (15), the cooling water outlet pipe (19), the cooling water inlet pipe (18) and the non-condensable gas vent pipe (17).

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