Novel primary cooler flushing device
By using a combination of steam purging and hot ammonia water spray in the primary cooler, the temperature is controlled to not exceed 90℃, which solves the problem of thickening of the adhesion layer caused by steam purging, and achieves efficient cleaning between the tubes of the primary cooler and gas Protected circulation.
Patent Information
- Application Number
- CN202420778673.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The current method of steam purging and cleaning the pipe between the primary cooler will cause the adhesion layer of the outer wall between the column tubes to thicken, which will affect gas circulation in severe cases.
The new primary cooler flushing device is adopted, which includes waste heat water pipes, circulating water pipes and low-temperature water pipes in the shell. Combined with steam purging and hot ammonia spraying, the primary cooler shell is maintained by controlling the spray amount of steam and ammonia water. The temperature should not exceed 90℃ to clean up the solid materials accumulated between the pipes.
Effectively dissolve and clean the solid material between the primary cooler pipes, avoid thickening of the outer wall attachment layer between the column pipes, ensure normal gas circulation, simplify operation and reduce operating costs.
Smart Images
Figure CN222428684U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of primary coolers, in particular to a novel primary cooler flushing device. Background Art
[0002] The primary cooler is the core equipment used by the coal gas chemical industry to cool hot coal gas. Currently, the most common primary cooler is the horizontal tube type primary cooler, which has several horizontal pipes inside. Cooling water circulates in the pipes. Hot gas (mainly coal gas) enters from the top of the primary cooler, encounters cooling water in the horizontal pipes in the primary cooler and cools down, and then goes out from the bottom, so that the temperature of the gas flowing out of the primary cooler reaches the technical indicators.
[0003] During the operation of the primary cooler, due to impurities in the raw gas, the condensate is continuously sprayed in a cycle, resulting in the accumulation of tar residue, coal tar powder, naphthalene crystals and tar between the tubes of the primary cooler, which reduces the gas passage between the tubes. At present, steam purging is usually used for cleaning. Due to the high steam temperature, tar and tar residue are dried and dehydrated, and attached to the outside of the tube wall; repeated steam purging causes the outer wall of the tube to thicken, which seriously affects the gas circulation. Utility Model Content
[0004] The technical problem to be solved by the utility model is that the current method of steam blowing to clean the gas between pipes will lead to the thickening of the outer wall adhesion layer between the tubes, which will seriously affect the gas circulation.
[0005] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a new type of pre-cooler flushing device proposed in the utility model includes a shell, in which a waste hot water pipe, a circulating water pipe and a low-temperature water pipe are arranged in sequence from top to bottom, a gas inlet is arranged on the top wall of the shell, an ammonia water inlet is arranged on the upper side wall of the shell, a group of ammonia water inlet pipes are connected to the ammonia water inlet, a spray flushing device is arranged on the side wall of the shell, a purge steam pipe and a heating temperature measuring sensor are arranged in the shell, the purge steam pipe and the heating temperature measuring sensor are arranged below the spray flushing device, and a liquid withdrawal mechanism is connected to the outside of the shell.
[0006] Furthermore, a spray flushing pipe is provided on the side wall of the shell, and the spray flushing device includes a condensate pipe and an ammonia water flushing pipe, the condensate pipe and the ammonia water flushing pipe are connected to the spray flushing pipe through a three-way head, a thermometer and a pressure gauge are provided on the spray flushing pipe, and control valves are provided on the condensate pipe and the ammonia water flushing pipe.
[0007] Furthermore, two groups of spraying and flushing devices are arranged on the side wall of the shell, one group of spraying and flushing devices is arranged in the middle and upper part of the shell, and the other group of spraying and flushing devices is arranged in the middle and lower part of the shell. The two groups of spraying and flushing devices are respectively located above the circulating water pipe and the low-temperature water pipe.
[0008] Furthermore, in the present embodiment, two groups of the purge steam pipes and the heating temperature measuring sensors are provided corresponding to the spraying and flushing devices, and the two groups of the purge steam pipes and the heating temperature measuring sensors are respectively located below the circulating water pipe and the low-temperature water pipe.
[0009] Preferably, a plurality of groups of the purge steam pipes are evenly distributed along the circumferential direction of the shell.
[0010] Preferably, the ammonia water inlet pipe and the ammonia water flushing pipe are both connected to a steam heating pipe.
[0011] In this scheme, the shell temperature of the pre-cooler is kept below 90°C by controlling the amount of purge steam and hot ammonia water spray.
[0012] Furthermore, in the present embodiment, a liquid withdrawal guide groove is provided below the circulating water pipe, and the liquid withdrawal guide groove is located below the purging steam pipe correspondingly provided below the circulating water pipe. Two groups of liquid withdrawal mechanisms are provided, one group of liquid withdrawal mechanisms is provided corresponding to the liquid withdrawal guide groove, and the other group of liquid withdrawal mechanisms is provided at the lower part of the shell.
[0013] Furthermore, the liquid withdrawal mechanism includes a liquid withdrawal pipe, which is fixedly connected to the side wall of the shell, and the liquid withdrawal pipes of the two groups of liquid withdrawal mechanisms are connected to liquid infusion pipes, and the liquid infusion pipes are externally connected to a cleaning liquid withdrawal collection tank. Control valves are provided on the liquid withdrawal pipe and the liquid infusion pipe, and a delivery pump is installed on the cleaning liquid withdrawal collection tank, and the delivery pump is externally connected to a mechanized clarification tank or an ammonia tar separation tank.
[0014] Compared with the prior art, the utility model has the following advantages:
[0015] In this solution, a combination of steam purging and heated ammonia flushing is used to dissolve and clean the solid materials accumulated between the tubes of the pre-cooler, and to ensure that the overall temperature of the pre-cooler does not exceed 90°C, thus avoiding the problem of thickening of the outer wall adhesion layer between the tubes.
[0016] This solution solves the existing problems that solid materials accumulated between the tubes of the primary cooler are prone to blockage and tar hanging on the wall is easily dehydrated and dried by steam blowing, simplifies the operation, and reduces the operating resistance and operating cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a structural schematic diagram of the spraying and flushing device of the utility model;
[0020] Figure 3 It is a structural schematic diagram of the liquid withdrawal mechanism of the utility model.
[0021] In the figure: 1. Shell, 2. Waste water pipe, 3. Circulating water pipe, 4. Low temperature water pipe, 5. Gas inlet, 6. Ammonia water inlet pipe, 7. Purge steam pipe, 8. Heating temperature sensor, 9. Liquid withdrawal pipe, 10. Liquid infusion pipe, 11. Cleaning liquid withdrawal collection tank, 12. Delivery pump, 13. Condensate pipe, 14. Ammonia water flushing pipe, 15. Spray flushing pipe, 16. Temperature gauge, 17. Pressure gauge. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0023] like Figure 1 , Figure 2 and Figure 3 As shown, the present embodiment provides a novel pre-cooler flushing device, comprising a shell 1, in which a waste hot water pipe 2, a circulating water pipe 3 and a low-temperature water pipe 4 are sequentially arranged from top to bottom, a gas inlet 5 is arranged on the top wall of the shell 1, an ammonia water inlet is arranged on the upper side wall of the shell 1, a group of ammonia water inlet pipes 6 are connected to the ammonia water inlet, flushing ammonia water is transported to the inside of the shell 1 through the ammonia water inlet, and the waste hot water pipe 2 is flushed, a spray flushing device is arranged on the side wall of the shell 1, the spray flushing device is used to spray condensate, and ammonia water is added for flushing, a purge steam pipeline 7 and a heating temperature measuring sensor 8 are arranged in the shell 1, and the purge steam pipeline 7 and the heating temperature measuring sensor 8 are arranged below the spray flushing device, and the waste hot water pipe 2, the circulating water pipe 3 and the low-temperature water pipe 4 in the pre-cooler shell 1 are cleaned by ammonia water flushing in combination with steam purge and heating, and a liquid withdrawal mechanism is connected to the shell 1, and the liquid withdrawal and discharge of the condensate are realized by the setting of the liquid withdrawal mechanism.
[0024] Specifically, see Figure 1 and Figure 2In this embodiment, a spraying and flushing pipe 15 is provided on the side wall of the shell 1, and the spraying and flushing device includes a condensate pipe 13 and an ammonia water flushing pipe 14. The condensate pipe 13 and the ammonia water flushing pipe 14 are connected to the spraying and flushing pipe 15 through a three-way head. A thermometer 16 and a pressure gauge 17 are provided on the spraying and flushing pipe 15 for monitoring the temperature and pressure inside the shell 1. The condensate pipe 13 and the ammonia water flushing pipe 14 are both provided with control valves; two groups of spraying and flushing devices are provided on the side wall of the shell 1, one group of spraying and flushing devices is provided in the middle and upper part of the shell 1, and the other group of spraying and flushing devices is provided in the middle and lower part of the shell 1. The two groups of spraying and flushing devices are respectively located above the circulating water pipe 3 and the low-temperature water pipe 4.
[0025] Specifically, see Figure 1 In this embodiment, two groups of purge steam pipes 7 and heating temperature sensors 8 are provided corresponding to the spraying and flushing devices, and the two groups of purge steam pipes 7 and heating temperature sensors 8 are respectively located below the circulating water pipe 3 and the low-temperature water pipe 4; multiple groups of purge steam pipes 7 are evenly distributed along the circumferential direction of the shell 1; steam heating pipes are connected to the ammonia water inlet pipe 6 and the ammonia water flushing pipe 14, and the temperature of the added flushing ammonia water is increased under the action of steam heating, so as to dissolve the tar residue, naphthalene, coal coke powder and other solid materials attached to the pipe wall, and the flushing ammonia water is discharged through the liquid withdrawal pipe.
[0026] In this solution, the temperature of the primary cooler shell 1 is kept below 90° C. by controlling the amount of purge steam and hot ammonia water spray.
[0027] Specifically, see Figure 1 and Figure 3 In this embodiment, a liquid withdrawal guide groove is provided below the circulating water pipe 3, and the liquid withdrawal guide groove is located below the purging steam pipe 7 correspondingly provided below the circulating water pipe 3. Two groups of liquid withdrawal mechanisms are provided, one group of liquid withdrawal mechanisms is provided corresponding to the liquid withdrawal guide groove, and the other group of liquid withdrawal mechanisms is provided at the lower part of the shell 1; the liquid withdrawal mechanism includes a liquid withdrawal pipeline 9, and the liquid withdrawal pipeline 9 is fixedly connected to the side wall of the shell 1. The liquid withdrawal pipelines 9 of the two groups of liquid withdrawal mechanisms are connected to a liquid infusion pipe 10, and the liquid infusion pipe 10 is externally connected to a cleaning liquid withdrawal receiver The collecting tank 11, the liquid withdrawal pipeline 9 and the liquid delivery pipe 10 are all provided with control valves. The cleaning liquid withdrawal collecting tank 11 is equipped with a delivery pump 12, and the delivery pump 12 is externally connected to a mechanized clarification tank or an ammonia tar separation tank. Under the action of the delivery pump 12, the liquid withdrawal in the shell 1 can be sucked into the cleaning liquid withdrawal collecting tank 11 for treatment, and according to the cleaning liquid withdrawal collection liquid level, the outlet valve opening of the delivery pump 12 is controlled to discharge the flushed recombinant component containing solid particles into the mechanized clarification tank or the ammonia tar separation tank.
[0028] When in use, raw gas enters the primary cooler from the gas inlet 5, and hot ammonia water is first added to the ammonia water inlet pipe 6 at the top to cool the gas on the waste heat water pipe 2 and condense and separate the tar, ammonia water and water vapor.
[0029] Under the action of the condensate transported by the condensate pipe 13 located at the upper part and the hot ammonia water transported by the ammonia water flushing pipe 14, heat exchange is achieved with the circulating water pipe 3, so as to realize the cooling of coal gas and the condensation and separation of tar, ammonia water and water vapor. The upper condensate is discharged from a group of liquid withdrawal pipes 9 located above.
[0030] Under the action of the condensate transported by the condensate pipe 13 located at the bottom and the hot ammonia water transported by the ammonia water flushing pipe 14, heat exchange is achieved with the low-temperature water pipe 4, so as to achieve the cooling of coal gas and the condensation and separation of tar and naphthalene: the lower condensate is discharged from a group of liquid withdrawal pipes 9 located at the top.
[0031] The condensed liquid from the upper and lower sections enters the cleaning liquid collection tank 11 and is sent to the mechanized clarification tank or the ammonia tar separation tank through the delivery pump 12.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A novel primary cooler flushing device comprises a shell, wherein a waste hot water pipe, a circulating water pipe and a low temperature water pipe are sequentially arranged in the shell from top to bottom, and a gas inlet is arranged on the top wall of the shell, characterized in that: An ammonia water inlet is provided on the upper side wall of the shell, and a group of ammonia water inlet pipes are connected to the ammonia water inlet. A spraying and flushing device is provided on the side wall of the shell. A purge steam pipeline and a heating and temperature measuring sensor are provided in the shell, and the purge steam pipeline and the heating and temperature measuring sensor are arranged below the spraying and flushing device. The shell is externally connected to a liquid withdrawal mechanism.
2. A novel primary cooler flushing device according to claim 1, characterized in that: A spraying and flushing pipe is arranged on the side wall of the shell, and the spraying and flushing device includes a condensate pipe and an ammonia water flushing pipe, the condensate pipe and the ammonia water flushing pipe are connected to the spraying and flushing pipe through a three-way head, a temperature gauge and a pressure gauge are arranged on the spraying and flushing pipe, and control valves are arranged on the condensate pipe and the ammonia water flushing pipe.
3. A novel primary cooler flushing device according to claim 2, characterized in that: The spraying and flushing devices are arranged in two groups on the side wall of the shell, one group of the spraying and flushing devices is arranged in the middle and upper part of the shell, and the other group of the spraying and flushing devices is arranged in the middle and lower part of the shell. The two groups of the spraying and flushing devices are respectively located above the circulating water pipe and the low-temperature water pipe.
4. A novel primary cooler flushing device according to claim 3, characterized in that: The purge steam pipe and the heating temperature measuring sensor are both provided with two groups corresponding to the spraying and flushing device, and the two groups of the purge steam pipe and the heating temperature measuring sensor are respectively located below the circulating water pipe and the low-temperature water pipe.
5. A novel primary cooler flushing device according to claim 4, characterized in that: The purge steam pipes are evenly distributed in a plurality of groups along the circumferential direction of the shell.
6. A novel primary cooler flushing device according to claim 5, characterized in that: The ammonia water inlet pipe and the ammonia water flushing pipe are both connected with a steam heating pipe.
7. A novel primary cooler flushing device according to claim 6, characterized in that: A liquid withdrawal guide groove is arranged below the circulating water pipe, and the liquid withdrawal guide groove is located below the purging steam pipeline correspondingly arranged below the circulating water pipe. The liquid withdrawal mechanism is provided with two groups, one group of the liquid withdrawal mechanism is arranged corresponding to the liquid withdrawal guide groove, and the other group of the liquid withdrawal mechanism is arranged at the lower part of the shell.
8. A novel primary cooler flushing device according to claim 7, characterized in that: The liquid withdrawal mechanism includes a liquid withdrawal pipeline, which is fixedly connected to the side wall of the shell. The liquid withdrawal pipelines of the two groups of liquid withdrawal mechanisms are connected to liquid infusion pipelines, and the liquid infusion pipelines are externally connected to a cleaning liquid withdrawal collection tank. Control valves are provided on the liquid withdrawal pipeline and the liquid infusion pipeline. A delivery pump is installed on the cleaning liquid withdrawal collection tank, and the delivery pump is externally connected to a mechanized clarification tank or an ammonia tar separation tank.