Waste heat boiler blow-down water cooling and recycling device

Abstract

The utility model provides a waste heat boiler blow-off water cooling and recycling device which comprises a steam-liquid separator connected with a waste heat boiler blow-off water pipe, a filter screen is arranged in the steam-liquid separator, the top of the steam-liquid separator is connected with a steam pipe network, and the bottom of the steam-liquid separator is connected with a water treatment pipeline. The water treatment pipeline comprises a regulating valve connected with a vapor-liquid separator pipeline, and is sequentially provided with a gate valve A, a filter, a check valve and a gate valve B; the water treatment pipeline rear section comprises a cooling section, a monitoring section and a mixing section; the cooling section of the water treatment pipeline is sleeved with a cooling water jacketed pipe A, the end part of the mixing section of the water treatment pipeline is provided with a spray nozzle, and the mixing section of the water treatment pipeline is sleeved with a cooling water jacketed pipe B; the device solves the problem of waste caused by on-site discharge of a large amount of sewage of the waste heat boiler of the device, solves the problems of loud noise and environmental pollution caused by on-site discharge, and achieves the purposes of energy conservation, consumption reduction, safety, environmental protection and improvement of long-period stable operation of the device.

Description

Technical Field

[0001] The utility model relates to the field of water resource recycling technology, in particular to a waste heat boiler sewage cooling and recovery device. Background Art

[0002] In the coal chemical ammonia-methanol co-production process, waste heat boiler is one of the important equipment. It recovers heat to produce steam of different pressure levels as a by-product. The continuous and intermittent discharge of waste water from the waste heat boiler is the key to ensure the quality of boiler water and steam from the waste heat boiler. However, the total amount of waste water discharged from all waste heat boilers is as much as several tons. Therefore, the boiler waste water is not effectively and reasonably recycled, but is directly discharged outside the ditch, resulting in a large amount of water resource waste, which seriously restricts the safe, economical, efficient and energy-saving operation of the device. Utility Model Content

[0003] The utility model proposes a waste heat boiler sewage cooling and recovery device, which solves the problem of waste on-site discharge of a large amount of sewage from the waste heat boiler of the device, and solves the problem of high noise and environmental pollution caused by on-site discharge, thereby achieving the purpose of energy saving and consumption reduction, safety and environmental protection, thereby improving the long-term stable operation of the device.

[0004] The specific plan is as follows:

[0005] A waste heat boiler waste water cooling and recovery device comprises a vapor-liquid separator connected to a waste heat boiler waste water pipe, a filter screen is arranged inside the vapor-liquid separator, the top of the vapor-liquid separator is connected to a steam pipe network, and the bottom is connected to a water treatment pipeline; the water treatment pipeline comprises a regulating valve connected to the vapor-liquid separator pipeline, and is provided with a gate valve A, a filter, a check valve, and a gate valve B in sequence; the rear section of the water treatment pipeline comprises a cooling section, a monitoring section, and a mixing section; the cooling section of the water treatment pipeline is externally sleeved with a cooling water jacket pipe A, and the cooling water jacket pipe A is connected to a circulating water supply pipe through a gate valve C; a spray nozzle is arranged at the end of the mixing section of the water treatment pipeline, and a cooling water jacket pipe B is externally sleeved, and the cooling water jacket pipe B is connected to a circulating water return pipe through a gate valve D, and the cooling water jacket pipe A is connected to the cooling water jacket pipe B through a cooling water pipe; a thermometer A is arranged at the rear section of the water treatment pipeline gate valve B, and a thermometer B and a pressure gauge A are arranged in the monitoring section of the water treatment pipeline.

[0006] A gate valve E is arranged between the regulating valve and the gate valve A to connect to the ditch, so as to prevent the boiler water from being discharged directly into the ditch without stopping the machine when there is a problem in the rear section of the water treatment pipeline, and at the same time repair the rear section of the water treatment management.

[0007] Gate valves F and G are arranged at both ends of the regulating valve, and gate valve H is connected in parallel. When the regulating valve is damaged, the regulating valve can be repaired without stopping the machine by closing gate valves F and G and opening gate valve H.

[0008] The cooling water pipe is provided with a pressure gauge B, a thermometer C and an exhaust drain valve, which can monitor the water pressure and temperature of the cooling water pipe to ensure that the water pressure and temperature of the cooling water in the cooling water jacket B are close to those of the boiler water in the mixing section at the rear section of the water treatment pipeline.

[0009] In the waste heat boiler blowdown pipe of the utility model, the waste heat boiler water is discharged into the steam-liquid separator. After the steam passes through the filter screen, it directly enters the steam pipe network for utilization. The boiler water passes through the regulating valve, gate valve A, filter, check valve, and gate valve B of the water treatment pipeline, and enters the cooling section at the rear section of the water treatment pipeline. After heat exchange through the cooling water jacket A, the temperature and pressure are monitored in the monitoring section at the rear section of the water treatment pipeline. Finally, it is mixed with the circulating water in the cooling water jacket B through the spray nozzle in the mixing section at the rear section of the water treatment pipeline, and then enters the circulating return pipe through the gate valve D for recycling; through the heat exchange of the cooling water jacket A and the cooling water jacket B for the boiler water in the water treatment pipeline, the temperature of the boiler water sprayed by the spray nozzle in the mixing section at the rear section of the water treatment pipeline is close to that of the water in the cooling water jacket B. Brief Description of the Drawings

[0010] Figure 1 . Structural schematic diagram of the utility model. Detailed Description of the Preferred Embodiment

[0011] As Figure 1 shown, a waste heat boiler blowdown water cooling and recovery device includes a steam-liquid separator 2 connected to the waste heat boiler blowdown pipe 1. A filter screen 3 is provided inside the steam-liquid separator 2. The top is connected to the steam pipe network 4, and the bottom is connected to the water treatment pipeline; the water treatment pipeline includes a regulating valve 5 connected to the steam-liquid separator 2 through a pipeline, and successively provided with a gate valve A 6, a filter 7, a check valve 8, and a gate valve B 9; the rear section of the water treatment pipeline includes a cooling section 10, a monitoring section 11, and a mixing section 12; the outside of the cooling section 10 of the water treatment pipeline is sleeved with a cooling water jacket A 13, and the cooling water jacket A 13 is connected to the circulating upper water pipe 15 through a gate valve C 14; a spray nozzle 16 is provided at the end of the mixing section 12 of the water treatment pipeline, and the outside is sleeved with a cooling water jacket B 17. The cooling water jacket B 17 is connected to the circulating return pipe 19 through a gate valve D 18, and the cooling water jacket A 13 and the cooling water jacket B 17 are connected by a cooling water pipe 20; a thermometer A 21 is provided after the gate valve B 9 of the water treatment pipeline, and a thermometer B 22 and a pressure gauge A 23 are provided in the monitoring section 11 of the water treatment pipeline.

[0012] A gate valve E 24 is provided between the regulating valve 5 and the gate valve A 6 and connected to the trench, which can avoid direct discharge of the boiler water into the trench without shutting down the machine when problems occur in the rear section of the water treatment pipeline, and at the same time repair the rear section of the water treatment pipeline.

[0013] Gate valves F25 and G26 are provided at both ends of the regulating valve 5, and gate valve H27 is connected in parallel. When the regulating valve 5 is damaged, by closing gate valves F25 and G26 and opening gate valve H27, the regulating valve 5 can be repaired without shutting down the machine.

[0014] A pressure gauge B28, a thermometer C29 and an exhaust drain valve 30 are provided on the cooling water pipe 20, which can monitor the water pressure and temperature of the cooling water pipe 20 to ensure that the water pressure and temperature of the cooling water in the cooling water jacket B17 are close to those of the boiler water in the mixing section 12 at the rear section of the water treatment pipeline.

[0015] In the waste heat boiler blowdown pipe 1 of the present utility model, the waste heat boiler water is discharged into the steam-liquid separator 2. After the steam passes through the filter screen 3, it directly enters the steam pipe network 4 for utilization. The boiler water passes through the regulating valve 5, gate valve A6, filter 7, check valve 8, and gate valve B9 of the water treatment pipeline, and enters the cooling section 10 at the rear section of the water treatment pipeline. After heat exchange through the cooling water jacket A13, the temperature and pressure are monitored in the monitoring section 11 at the rear section of the water treatment pipeline. Finally, after being mixed with the circulating water in the cooling water jacket B17 through the spray nozzle 16 in the mixing section 12 at the rear section of the water treatment pipeline, it enters the circulating return pipe 19 through the gate valve D18 for recycling; through the heat exchange of the boiler water in the water treatment pipeline by the cooling water jacket A13 and the cooling water jacket B17, the temperature of the boiler water sprayed by the spray nozzle 16 in the mixing section 12 at the rear section of the water treatment pipeline is close to that of the water in the cooling water jacket B17.

[0016] The above are only some preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A waste heat boiler wastewater cooling and recovery device, characterized in that: It comprises a vapor-liquid separator connected to the waste water pipe of the waste heat boiler, a filter screen is arranged inside the vapor-liquid separator, the top is connected to the steam network, and the bottom is connected to the water treatment pipeline; the water treatment pipeline comprises a regulating valve connected to the vapor-liquid separator pipeline, and is provided with a gate valve A, a filter, a check valve, and a gate valve B in sequence; the rear section of the water treatment pipeline comprises a cooling section, a monitoring section, and a mixing section; the cooling section of the water treatment pipeline is externally sleeved with a cooling water jacket pipe A, and the cooling water jacket pipe A is connected to the circulating water supply pipe through a gate valve C; a spray nozzle is arranged at the end of the mixing section of the water treatment pipeline, and a cooling water jacket pipe B is externally sleeved, and the cooling water jacket pipe B is connected to the circulating water return pipe through a gate valve D, and the cooling water jacket pipe A is connected to the cooling water jacket pipe B through the cooling water pipe; a thermometer A is arranged at the rear section of the water treatment pipeline gate valve B, and a thermometer B and a pressure gauge A are arranged in the monitoring section of the water treatment pipeline.

2. The waste heat boiler waste water cooling and recovery device according to claim 1 is characterized in that: A gate valve E is arranged between the regulating valve and the gate valve A to connect to the ditch.

3. The waste heat boiler waste water cooling and recovery device according to claim 1 is characterized in that: Gate valves F and G are arranged at both ends of the regulating valve, and gate valve H is connected in parallel.

4. The waste heat boiler waste water cooling and recovery device according to claim 1, characterized in that: The cooling water pipe is provided with a pressure gauge B, a thermometer C and an exhaust drainage valve.

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