Circulating ammonia water waste heat heating device

Abstract

The utility model relates to the technical field of circulating ammonia water waste heat heating, and particularly discloses a circulating ammonia water waste heat heating device which comprises a bridge pipe, a gas collecting pipe arranged at the bottom end of the bridge pipe, a gas-liquid separator connected with the gas collecting pipe, a primary cooler arranged on one side of the upper portion of the gas-liquid separator, and subsequent equipment connected with the bottom of the primary cooler. The bottom of the gas-liquid separator is communicated with a tar-ammonia water separation tank, and a circulating ammonia water tank is arranged at the bottom of the tar-ammonia water separation tank; an outlet of the circulating ammonia water tank is communicated with an inlet of a circulating ammonia water pump, an outlet of the circulating ammonia water pump is communicated with a top spraying opening of the bridge pipe, and the primary cooler is connected with the outlet of the circulating ammonia water pump through a condensate pump; a heating system is arranged on a connecting pipeline of the circulating ammonia water tank and the circulating ammonia water pump. Compared with the prior art, the waste heat utilization rate of circulating ammonia water can be greatly improved, the process is simple, the investment is only 1 / 10 of that of a lithium bromide unit, and the requirement for external heating of a coking plant in winter is met.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating ammonia water waste heat heating, and specifically discloses a circulating ammonia water waste heat heating device. Background Art

[0002] The circulating ammonia water in the coking plant is mainly used to circulate and cool the raw gas produced by the coke oven. In the north, heating services are provided to urban residents every winter, and heating water with a temperature of 58-60℃ needs to be supplied to the outside. It is calculated that the heat demand for every 10,000㎡ of heating area is about 1-1.2GJ / h, and the heat demand for heating is huge.

[0003] In order to utilize the heat of the circulating ammonia water in the coking plant to provide heating services for residents, the patent with announcement number CN111607436A discloses a coking low-temperature waste heat comprehensive utilization system, including a coke oven riser, a bridge pipe, a primary cooler body, an electrostatic precipitator and an ammonia distillation section, one side of the coke oven riser is connected to the bridge pipe, and one side of the bottom end of the bridge pipe is installed with a gas collecting pipe, one side of the gas collecting pipe is provided with a gas-liquid separator, and one side of the gas-liquid separator is provided with a primary cooler body, the output end of the primary cooler body is installed with an electrostatic precipitator, and a blower is installed on the side of the electrostatic precipitator away from the primary cooler body, one side of the blower is connected to the desulfurization section, and one side of the desulfurization section is connected to the crude benzene section.

[0004] The above scheme has the following problems: it utilizes the waste heat of circulating ammonia water, and uses circulating ammonia water at about 80°C to produce hot water or steam above 150°C. The heating heat utilization rate of this scheme is only 40%-50%, and the overall external heat supply is low, which cannot meet the heat demand of residents for heating, and the operating cost is high, which is not suitable for residential heating projects; and the whole set of equipment is relatively large in size, the process is relatively complicated, and the equipment investment is huge. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a circulating ammonia waste heat heating device to solve the problems that the overall external heat supply is low, which cannot meet the heat demand of residents for heating, and the operating cost is high and is not suitable for residential heating projects.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A circulating ammonia waste heat heating device comprises a bridge pipe, a gas collecting pipe is arranged at the bottom of the bridge pipe, the gas collecting pipe is connected to a gas-liquid separator, a primary cooler is arranged on one side of the upper part of the gas-liquid separator, the bottom of the primary cooler is connected to subsequent equipment, the bottom of the gas-liquid separator is connected to a tar-ammonia separation tank, and a circulating ammonia tank is arranged at the bottom of the tar-ammonia separation tank; the outlet of the circulating ammonia tank is connected to the inlet of a circulating ammonia pump, and the outlet of the circulating ammonia pump is connected to the spraying port at the top of the bridge pipe, and the primary cooler is connected to the outlet of the circulating ammonia pump through a condensate pump; a heating system is arranged on the connecting pipeline between the circulating ammonia tank and the circulating ammonia pump. The heating system is arranged on the connecting pipeline between the circulating ammonia tank and the circulating ammonia pump, which can effectively prevent the normal operation of the coke oven from being affected by a heating system failure. The low-temperature condensate produced by the primary cooler is separated and pumped into the pipe at the outlet of the circulating ammonia pump, which can ensure that the circulating ammonia temperature is not affected by the low temperature of the condensate and recover heat to the maximum extent. The circulating ammonia waste heat heating device can greatly improve the waste heat utilization rate of the circulating ammonia, and the process is simple. The investment is only 1 / 10 of that of the lithium bromide unit, which is suitable for the external heating needs of the coking plant in winter.

[0008] Preferably, the heating system includes an ammonia booster pump; the inlet of the ammonia booster pump is connected to the connecting pipeline between the circulating ammonia tank and the circulating ammonia pump; the outlet of the ammonia booster pump is connected to the hot side inlet of the heat exchanger; the hot side outlet of the heat exchanger is connected to the connecting pipeline between the circulating ammonia tank and the circulating ammonia pump; the heat exchanger is connected to the heat exchange medium circulation pipeline.

[0009] Preferably, the heat exchange medium circulation pipeline includes a heating booster pump; the inlet of the heating booster pump is connected to the heat exchange medium outlet of the heat exchanger; the outlet of the heating booster pump is connected to the heating user inlet; the heating user outlet is connected to the heat exchange medium inlet of the heat exchanger. Ammonia water and the heat exchange medium complete heat exchange in the heat exchanger.

[0010] Preferably, a vacuum pump is connected to the inlet pipeline of the ammonia booster pump via a ball valve. The vacuum pump can ensure that the pipeline is filled with ammonia water.

[0011] Preferably, the outlet water temperature of the heat exchanger hot side is ≥63°C to prevent the low ammonia water temperature from affecting the tar separation effect.

[0012] Preferably, the outlet temperature of the heat exchange medium of the heat exchanger is 56°C-60°C.

[0013] The beneficial effects of the utility model are as follows: the heating system is arranged on the connecting pipeline between the circulating ammonia water tank and the circulating ammonia water pump, which can effectively prevent the heating system from affecting the normal operation of the coke oven after failure. The low-temperature condensate produced by the primary cooler is separated and pumped into the pipeline at the outlet of the circulating ammonia water pump, which can ensure that the temperature of the circulating ammonia water is not affected by the low temperature of the condensate and recover the heat to the maximum extent; the circulating ammonia water waste heat heating device can greatly improve the waste heat utilization rate of the circulating ammonia water, and the process is simple, and the investment is only 1 / 10 of that of the lithium bromide unit, which is suitable for the winter external heating needs of the coking plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Description of reference numerals:

[0017] 1-bridge pipe, 2-gas collecting pipe, 3-gas-liquid separator, 4-primary cooler, 5-subsequent equipment, 6-tar ammonia water separation tank, 7-circulating ammonia water tank, 8-circulating ammonia water pump, 9-ammonia water booster pump, 10-heat exchanger, 11-heating booster pump, 12-heating user, 13-condensate pump, 14-vacuum pump, 15-ball valve. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] like Figure 1As shown, a circulating ammonia waste heat heating device includes a bridge pipe 1, a gas collecting pipe 2 is arranged at the bottom of the bridge pipe 1, the gas collecting pipe 2 is connected to a gas-liquid separator 3, a primary cooler 4 is arranged on one side of the upper part of the gas-liquid separator 3, the bottom of the primary cooler 4 is connected to a subsequent device 5, the bottom of the gas-liquid separator 3 is connected to a tar ammonia water separation tank 6, and a circulating ammonia water tank 7 is arranged at the bottom of the tar ammonia water separation tank 6; the outlet of the circulating ammonia water tank 7 is connected to the inlet of the circulating ammonia water pump 8, and the outlet of the circulating ammonia water pump 8 is connected to the spraying port at the top of the bridge pipe 1, and the primary cooler 4 is connected to the outlet of the circulating ammonia water pump 8 through a condensate pump 13; a heating system is arranged on the connecting pipeline between the circulating ammonia water tank 7 and the circulating ammonia water pump 8. The heating system is arranged on the connecting pipeline between the circulating ammonia water tank 7 and the circulating ammonia water pump 8, which can effectively prevent the normal operation of the coke oven from being affected after the heating system fails. The low-temperature condensate produced by the primary cooler 4 is separated and pumped into the pipeline at the outlet of the circulating ammonia water pump 8, which can ensure that the temperature of the circulating ammonia water is not affected by the low temperature of the condensate and recover heat to the maximum extent; the circulating ammonia water waste heat heating device can greatly improve the waste heat utilization rate of the circulating ammonia water, and the process is simple, the investment is only 1 / 10 of that of the lithium bromide unit, and is suitable for the external heating needs of the coking plant in winter.

[0020] Among them, the heating system includes an ammonia booster pump 9; the inlet of the ammonia booster pump 9 is connected to the connecting pipeline between the circulating ammonia tank 7 and the circulating ammonia pump 8; the outlet of the ammonia booster pump 9 is connected to the hot side inlet of the heat exchanger 10; the hot side outlet of the heat exchanger 10 is connected to the connecting pipeline between the circulating ammonia tank 7 and the circulating ammonia pump 8; the heat exchanger 10 is connected to a heat exchange medium circulation pipeline. The heat exchange medium circulation pipeline includes a heating booster pump 11; the inlet of the heating booster pump 11 is connected to the heat exchange medium outlet of the heat exchanger 10; the outlet of the heating booster pump 11 is connected to the inlet of the heating user 12; the outlet of the heating user 12 is connected to the heat exchange medium inlet of the heat exchanger 10. Ammonia water and the heat exchange medium complete heat exchange in the heat exchanger 10. A vacuum pump 14 is connected to the inlet pipeline of the ammonia booster pump 9 through a ball valve 15. The setting of the vacuum pump 14 can ensure that the pipeline is full of ammonia water.

[0021] In the above configuration, the outlet water temperature of the heat exchanger 10 at the hot side is equal to 63°C to prevent the low ammonia temperature from affecting the tar separation effect. The outlet temperature of the heat exchange medium of the heat exchanger 10 is 56°C.

[0022] Although the utility model is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the utility model, and these modifications or substitutions shall be within the scope of the utility model / any person of ordinary skill in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the utility model, and they shall be within the scope of protection of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope of protection of the claims.

Claims

1. A circulating ammonia waste heat heating device, comprising a bridge pipe (1), a gas collecting pipe (2) is arranged at the bottom end of the bridge pipe (1), the gas collecting pipe (2) is connected to a gas-liquid separator (3), a primary cooler (4) is arranged on one side of the upper part of the gas-liquid separator (3), the bottom of the primary cooler (4) is connected to a subsequent device (5), the bottom of the gas-liquid separator (3) is connected to a tar ammonia water separation tank (6), and a circulating ammonia water tank (7) is arranged at the bottom of the tar ammonia water separation tank (6), the outlet of the circulating ammonia water tank (7) is connected to the inlet of a circulating ammonia water pump (8), and the outlet of the circulating ammonia water pump (8) is connected to a spray port at the top of the bridge pipe (1), characterized in that: The primary cooler (4) is connected to the outlet of the circulating ammonia water pump (8) via a condensate pump (13); a heating system is provided on the pipeline connecting the circulating ammonia water tank (7) and the circulating ammonia water pump (8); The heating system comprises an ammonia booster pump (9); the inlet of the ammonia booster pump (9) is connected to the connecting pipeline between the circulating ammonia tank (7) and the circulating ammonia pump (8); the outlet of the ammonia booster pump (9) is connected to the hot side inlet of the heat exchanger (10); the hot side outlet of the heat exchanger (10) is connected to the connecting pipeline between the circulating ammonia tank (7) and the circulating ammonia pump (8); and the heat exchanger (10) is connected to a heat exchange medium circulation pipeline.

2. The circulating ammonia waste heat heating device according to claim 1 is characterized in that: The heat exchange medium circulation pipeline comprises a heating booster pump (11); the inlet of the heating booster pump (11) is connected to the heat exchange medium outlet of the heat exchanger (10); the outlet of the heating booster pump (11) is connected to the inlet of a heating user (12); and the outlet of the heating user (12) is connected to the heat exchange medium inlet of the heat exchanger (10).

3. The circulating ammonia waste heat heating device according to claim 1 is characterized in that: The inlet pipeline of the ammonia booster pump (9) is connected to a vacuum pump (14) via a ball valve (15).

4. The circulating ammonia waste heat heating device according to claim 1 is characterized in that: The outlet water temperature of the hot side of the heat exchanger (10) is ≥ 63°C.

5. The circulating ammonia waste heat heating device according to claim 4 is characterized in that: The outlet temperature of the heat exchange medium of the heat exchanger (10) is 56°C-60°C.

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