Metallurgical salt vaporization heating system

Abstract

The utility model relates to metallurgical saltification wind heating system, by saltification wind air supply system, steam supply system and heater, condensate recovery system, steam recovery system and control system constitute. Compared with prior art, the beneficial effect of the utility model is in guaranteeing heat transfer effect, guaranteeing good saltification effect under the premise of not causing corrosion to the waste heat boiler. The metallurgical saltification wind heating system heats a certain amount of saltification air to a certain temperature through steam to prevent the problem of corrosion of the waste heat boiler caused by the air at low temperature (normal temperature) entering the waste heat boiler, and recycles the steam cooling waste steam and condensate to meet the requirements of energy saving and environmental protection.

Description

Technical Field

[0001] This utility model relates to a metallurgical salt-chemical air heating system. Background Technology

[0002] If ambient temperature air is used for salinization, a large amount of ambient temperature salinization air will be introduced into the furnace during the operation of the waste heat boiler. On the one hand, this will cause low-temperature corrosion of the boiler's heating surface tubes, shortening the boiler's service life. On the other hand, the salinization effect of ambient temperature air is relatively poor, easily leading to severe slag formation in the radiant section and ash accumulation in the convective section of the waste heat boiler. Currently, workers are required to manually clean the slag and ash regularly, which is not only in a harsh working environment but also labor-intensive.

[0003] Currently, the method of surface overlay welding on the heated surface is adopted. This method is not only very expensive, but also reduces the heat transfer coefficient and has poor salting effect. Utility Model Content

[0004] The purpose of this invention is to provide a metallurgical salting air heating system that ensures good salting effect while guaranteeing heat transfer efficiency and preventing corrosion of the waste heat boiler.

[0005] The metallurgical salt-chemical air heating system provided by this utility model adopts the following technical solution: A metallurgical salt-curing air heating system includes a salt-curing air supply system, a steam supply system, a heater, a condensate recovery system, a waste steam recovery system, and a salt-curing air heating control system. The salt-curing air supply system and the steam supply system are respectively connected to the heater, the waste steam recovery system is connected to the steam supply system, and the salt-curing air heating control system is used to communicate with each system.

[0006] A further improvement is that the heater is a salinization air heater, which is a device that uses superheated or saturated steam to heat salinization air.

[0007] In a further improvement, the salinization air supply system includes a salinization fan, an electric air volume regulating valve, a first air valve, a silencer, and a flow meter, a temperature sensor, and a pressure sensor, which are sequentially connected to the air inlet channel of the salinization fan. The outlet of the air outlet channel is connected to the air inlet of the heater.

[0008] In a further improvement, the steam supply system includes a shut-off valve, an electric regulating valve, a flow meter, a temperature sensor, and a pressure sensor connected in sequence to the steam pipeline. The shut-off valve is connected in parallel at both ends of the electric regulating valve, and the outlet of the steam pipeline is connected to the inlet of the heater.

[0009] In a further improvement, the condensate recovery system includes a condensate recoverer, a drain valve and a shut-off valve connected sequentially to its inlet pipe, and shut-off valves connected to the steam outlet pipe and the steam inlet pipe of the condensate recoverer, respectively. The drain valve and the shut-off valve are connected in parallel at both ends. Two water pumps are connected in parallel to the outlet pipe of the condensate recoverer. Each water pump is connected to the condensate recoverer via a shut-off valve. The inlet end of the inlet pipe is connected to the outlet of the heater and the waste steam recovery system via a recovery pipe and a waste steam inlet pipe, respectively. A pressure sensor and a temperature sensor are connected sequentially to the recovery pipe, and a shut-off valve is connected to the waste steam inlet pipe.

[0010] In a further improvement, the waste steam recovery system includes a waste steam recoverer and a regulating valve connected to its steam inlet. The water inlet of the waste steam recoverer is connected to the steam outlet pipeline of the condensate recoverer, and the steam inlet is connected to the waste steam inlet pipeline.

[0011] In a further improvement, the salinization air heating control system includes a control cabinet, which communicates with the salinization air fan, the heater, and the condensate recovery unit. The outlet pipe of the heater is connected in sequence to a temperature sensor, a pressure sensor, and a second air valve.

[0012] Compared with the prior art, the beneficial effect of this utility model is to ensure good salinization effect while ensuring heat transfer effect and not causing corrosion to the waste heat boiler.

[0013] The metallurgical salt-curing air heating system heats a certain amount of salt-curing air to a certain temperature using steam, in order to prevent lower temperature (normal temperature) air from entering the waste heat boiler and causing corrosion. At the same time, it recovers the exhaust steam and condensate after the steam is cooled, thus achieving the requirements of energy conservation and environmental protection. Attached Figure Description

[0014] Figure 1 This is a process schematic diagram of the metallurgical salt-curing air heating system in an embodiment of this utility model; Figure 2 This is a schematic diagram of the air supply system of the metallurgical salt-curing air heating system in this embodiment of the utility model; Figure 3 This is a schematic diagram of the steam supply system of the metallurgical salt-curing air heating system in this embodiment of the utility model.

[0015] Figure 4 This is a schematic diagram of the heater of the metallurgical salt-curing air heating system in an embodiment of this utility model.

[0016] Figure 5 This is a schematic diagram of the condensate recovery system of the metallurgical salt-curing air heating system in this embodiment of the utility model.

[0017] Figure 6This is a schematic diagram of the exhaust steam recovery system of the metallurgical salt-curing air heating system in this embodiment of the utility model.

[0018] Figure 7 This is a schematic diagram of the heating control system of the metallurgical salt-chemical air heating system in an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Heater; 2. Salting blower; 3. Control cabinet; 4. Condensate recovery unit; 5. Waste steam recovery unit; 6. Pressure sensor; 7. Temperature sensor; 8. Flow meter; 9. Shut-off valve; 10. Electric regulating valve; 11. Electric air volume regulating valve; 12. First air valve; 13. Silencer; 14. Drain valve; 15. Regulating valve; 16. Second air valve; 17. Water pump. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0021] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments; Reference Figures 1 to 7 , Figure 1 Metallurgical salt chemical air heating system, consisting of Figure 2 Metallurgical salt chemical air supply system Figure 3 Steam supply system, Figure 4 heater, Figure 5 Condensate recovery system Figure 6 Exhaust steam recovery system Figure 7 The metallurgical salt chemical air heating control system consists of the following components: The metallurgical salt-chemical air supply system includes a salt-chemical blower 2, an electric air volume regulating gate 11, a first air valve 12, and a silencer 13 connected in sequence to the air inlet channel of the salt-chemical blower 2, and a flow meter 8, a temperature sensor 7, and a pressure sensor 6 connected in sequence to the air outlet channel of the salt-chemical blower 2. The outlet of the air outlet channel is connected to the air inlet of the heater 1, and the water outlet pipe of the heater 1 is connected in sequence to the temperature sensor 7, the pressure sensor 6, and the second air valve 16.

[0023] The steam in the steam supply system can be superheated or saturated steam. The steam supply system includes a shut-off valve 9, an electric regulating valve 10, a flow meter 8, a temperature sensor 7, and a pressure sensor 6 connected in sequence to the steam pipeline. The shut-off valve 9 is connected in parallel at both ends of the electric regulating valve 10. The outlet of the steam pipeline is connected to the inlet of the heater 1.

[0024] Heater 1 is a salinization air heater 11, which is a device that uses superheated or saturated steam to heat salinization air.

[0025] The condensate recovery system includes a condensate recoverer 4, a drain valve 14 and a shut-off valve 9 connected sequentially to its inlet pipe, and shut-off valves 9 connected to the steam outlet pipe and the steam inlet pipe of the condensate recoverer 4, respectively. The drain valve 14 and the shut-off valve 9 are connected in parallel at both ends. Two water pumps 17 are connected in parallel to the outlet pipe of the condensate recoverer 4. Each water pump 17 is connected to the condensate recoverer 4 via a shut-off valve 9. The inlet end of the inlet pipe is connected to the outlet of the heater 1 and the waste steam recovery system via a recovery pipe and a waste steam inlet pipe, respectively. A pressure sensor 6 and a temperature sensor 7 are connected sequentially to the recovery pipe, and a shut-off valve 9 is connected to the waste steam inlet pipe.

[0026] The waste steam recovery system includes a waste steam recoverer 5 and a regulating valve 15 connected to its steam inlet. The water inlet of the waste steam recoverer 5 is connected to the steam outlet pipeline of the condensate recoverer 4, and the steam inlet is connected to the waste steam inlet pipeline.

[0027] The temperature of the steam at the inlet of heater 1 decreases after passing through heater 1, causing some of the steam to condense into condensate. This condensate can be recovered by condensate recovery unit 4. After recovery, the condensate is pumped by water pump 17 to deaerator or other equipment that uses hot water.

[0028] After the steam is cooled by the heater 1, some of the steam does not condense. Meanwhile, the high-temperature water that has condensed will evaporate back into steam after the pressure is reduced in the condensate recovery unit 4. Both of these parts of steam can be recovered by the waste steam recovery unit 5. The waste steam recovery unit 5 uses room temperature water (demineralized water or softened water) to cool the steam into condensate, and then returns it to the condensate recovery unit 4 for recovery.

[0029] The metallurgical salt-chemical air heating control system mainly consists of a PLC and a touch screen in the control cabinet 3, which communicate with the salt-chemical air fan 2, heater 1 and condensate recovery unit 4 respectively. The system controls the steam flow, air flow and the outlet air temperature of heater 1 through the program in the control cabinet 3, so as to heat the salt-chemical air to the required temperature.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metallurgical salt-curing air heating system, characterized in that, It includes a salinization air supply system, a steam supply system, a heater (1), a condensate recovery system, a waste steam recovery system, and a salinization air heating control system. The salinization air supply system and the steam supply system are respectively connected to the heater (1), the waste steam recovery system is connected to the steam supply system, and the salinization air heating control system is used to communicate with each system.

2. The metallurgical salt-chemical air heating system according to claim 1, characterized in that, The heater (1) is a salinization air heater (1), which is a device that uses superheated or saturated steam to heat salinization air.

3. The metallurgical salt-chemical air heating system according to claim 1, characterized in that, The salt-processing air supply system includes a salt-processing fan (2), an electric air volume regulating gate (11), a first air valve (12), a silencer (13) connected in sequence to the air intake channel of the salt-processing fan (2), and a flow meter (8), a temperature sensor (7), and a pressure sensor (6) connected in sequence to the air outlet channel of the salt-processing fan (2). The outlet of the air outlet channel is connected to the air inlet of the heater (1).

4. The metallurgical salt-chemical air heating system according to claim 3, characterized in that, The steam supply system includes a shut-off valve (9), an electric regulating valve (10), a flow meter (8), a temperature sensor (7), and a pressure sensor (6) connected in sequence to the steam pipeline. The shut-off valve (9) is connected in parallel at both ends of the electric regulating valve (10), and the outlet of the steam pipeline is connected to the air inlet of the heater (1).

5. The metallurgical salt-chemical air heating system according to claim 4, characterized in that, The condensate recovery system includes a condensate recoverer (4), a drain valve (14) and a shut-off valve (9) connected in sequence to its inlet pipe, and shut-off valves (9) connected to the steam outlet pipe and the steam inlet pipe of the condensate recoverer (4) respectively. The drain valve (14) and the shut-off valve (9) are connected in parallel at both ends. Two water pumps (17) are connected in parallel on the outlet pipe of the condensate recoverer (4). Each water pump (17) is connected to the condensate recoverer (4) with a shut-off valve (9). The inlet end of the inlet pipe is connected to the outlet of the heater (1) and the waste steam recovery system through the recovery pipe and the waste steam inlet pipe respectively. A pressure sensor (6) and a temperature sensor (7) are connected in sequence on the recovery pipe. A shut-off valve (9) is connected on the waste steam inlet pipe.

6. The metallurgical salt-chemical air heating system according to claim 5, characterized in that, The waste steam recovery system includes a waste steam recoverer (5) and a regulating valve (15) connected to its steam inlet. The water inlet of the waste steam recoverer (5) is connected to the steam outlet pipeline of the condensate recoverer (4), and the steam inlet is connected to the waste steam inlet pipeline.

7. The metallurgical salt-chemical air heating system according to claim 6, characterized in that, The salt-curing air heating control system includes a control cabinet (3), which communicates with the salt-curing air fan (2), the heater (1) and the condensate recovery unit (4) respectively. The outlet pipe of the heater (1) is connected in sequence to the temperature sensor (7), the pressure sensor (6) and the second air valve (16), the electric air volume regulating door, the first air valve and the silencer. The outlet pipe of the heater is connected in sequence to the temperature sensor, the pressure sensor and the second air valve.

Images