Ammonia treatment device and fabric processing system

Abstract

This ammonia treatment device comprises: an ammonia refrigerator having a refrigeration cycle in which an ammonia refrigerant is circulated; a first cooler for cooling ammonia gas through heat exchange with the ammonia refrigerant and removing, from the ammonia gas, drain water generated from water vapor; and a blower that is provided downstream from the first cooler and that is for pressurizing the ammonia gas. The ammonia refrigerator has an evaporator that causes the ammonia refrigerant to evaporate due to the heat exchange between the ammonia refrigerant and the ammonia gas which has passed through the blower, and that liquefies the ammonia gas.

Description

Ammonia treatment apparatus and fabric processing system

[0001] The present disclosure relates to an ammonia treatment apparatus for obtaining liquid ammonia from ammonia gas containing water vapor, and a fabric processing system including the ammonia treatment apparatus.

[0002] Conventionally, an ammonia treatment apparatus for liquefying ammonia gas has been known. For example, the ammonia treatment apparatus (ammonia gas recovery and liquefaction apparatus) of Patent Document 1 is configured to recover and liquefy ammonia gas generated in a processing facility that modifies fabric using liquid ammonia, and supply the liquid ammonia to the processing facility again. The ammonia gas generated in the processing facility is sucked by a blower and enters the ammonia treatment apparatus, is pressurized by the blower, pre-cooled in a cooler, and further liquefied by heat exchange with a refrigerant in a condenser.

[0003] Japanese Patent Application Laid-Open No. 8-245217

[0004] By the way, when the ammonia gas to be liquefied in the ammonia treatment apparatus contains water vapor, the blower compresses not only the ammonia gas but also the water vapor, and the pressure boosting efficiency of the blower decreases. Therefore, when water vapor is mixed into the ammonia gas generated in the processing facility, the operation efficiency of the ammonia treatment apparatus described in Patent Document 1 decreases.

[0005] In view of the above circumstances, at least some embodiments of the present invention aim to provide an ammonia treatment apparatus capable of suppressing a decrease in the pressure boosting efficiency of a blower when liquefying ammonia gas containing water vapor.

[0006] Ammonia processing apparatus according to at least some embodiments of the present invention is an ammonia processing apparatus for obtaining liquid ammonia from ammonia gas containing water vapor, comprising: a refrigerator having a refrigeration cycle in which a refrigerant is circulated; a first cooler for cooling the ammonia gas by heat exchange with the refrigerant and removing drain water originating from the water vapor from the ammonia gas; and a blower provided downstream of the first cooler for pressurizing the ammonia gas, wherein the refrigerator has an evaporator configured to evaporate the refrigerant and liquefy the ammonia gas by heat exchange between the refrigerant and the ammonia gas after it has passed through the blower.

[0007] According to at least some embodiments of the present invention, the first cooler upstream of the blower removes condensate water derived from water vapor contained in the ammonia gas, thereby suppressing a decrease in the blower's pressurization efficiency caused by water vapor in the ammonia gas. Furthermore, the first cooler cools the ammonia gas by heat exchange with the refrigerant, thereby lowering the gas temperature before blower suction and suppressing the rise in blower outlet temperature, allowing the blower to operate stably.

[0008] This is a schematic diagram of an ammonia treatment device according to one embodiment. This is a schematic diagram of an ammonia treatment device according to another embodiment. This is a schematic diagram of a first cooler according to one embodiment. This is a schematic diagram of a fabric processing system according to one embodiment. This is a schematic diagram of a drain water treatment device according to one embodiment.

[0009] One embodiment of the present invention will be described below with reference to the attached drawings. However, the dimensions, materials, shapes, relative arrangements, etc., of the components described or shown in the drawings as embodiments are not intended to limit the scope of the present invention, but are merely illustrative examples.

[0010] Figure 1A is a schematic diagram of an ammonia treatment apparatus according to one embodiment. Figure 1B is a schematic diagram of an ammonia treatment apparatus according to another embodiment. Figure 2 is a schematic diagram of the first cooler of the ammonia treatment apparatus.

[0011] The ammonia treatment apparatus 10 (10A, 10B) shown in Figures 1A and 1B is a device that performs liquefaction of ammonia gas G to obtain liquid ammonia L from ammonia gas G. The ammonia treatment apparatus 10 (10A, 10B) includes an ammonia gas line 11 and a liquid ammonia line 12. The ammonia gas G to be liquefied flows through the ammonia treatment apparatus 10 via the ammonia gas line 11, and the liquid ammonia L obtained by the liquefaction of ammonia gas G flows out of the ammonia treatment apparatus 10 via the liquid ammonia line 12.

[0012] In some embodiments, as shown in Figures 1A and 1B, the ammonia treatment apparatus 10 (10A, 10B) includes a first cooler 30 for cooling ammonia gas G, a blower 40 located downstream of the first cooler 30, and a refrigerator 20 having an evaporator 22 for liquefying ammonia gas G.

[0013] In the embodiments shown in Figures 1A and 1B, the first cooler 30 is a heat exchanger for cooling ammonia gas G by heat exchange between the refrigerant R supplied from the refrigerator 20 and the ammonia gas G, and for removing condensate D1 derived from water vapor from the ammonia gas G. In the first cooler 30, the temperature of the ammonia gas G decreases due to heat exchange with the refrigerant R, and the water vapor contained in the ammonia gas G condenses at least partially to become condensate D1. The specific configuration of the refrigerator 20 will be described later, but the refrigerator 20 may be an ammonia refrigerator that uses ammonia refrigerant as the refrigerant R.

[0014] In the exemplary embodiment shown in Figure 2, the first cooler 30 includes a casing 32 having an internal space through which ammonia gas G flows, heat transfer tubes 33 housed inside the casing 32, and a drain pipe 31 for discharging drain water D1 generated inside the casing 32. Inside the heat transfer tubes 33, refrigerant R from the chiller 20 flows. On the other hand, outside the heat transfer tubes 33, ammonia gas G flows through the internal space of the casing 32. Therefore, the ammonia gas G is cooled by heat exchange between the refrigerant R flowing inside the heat transfer tubes 33 and the ammonia gas G flowing outside the heat transfer tubes 33. As a result, the water vapor contained in the ammonia gas G condenses at least partially, becoming drain water D1. The drain water D1 is collected at the bottom of the internal space of the casing 32 and discharged from the drain pipe 31.

[0015] A blower 40 is provided downstream of the first cooler 30 in the above configuration. The blower 40 pressurizes the ammonia gas G from which the drain water D1 derived from water vapor has been removed in the first cooler 30. Pressurizing the ammonia gas G by the blower 40 can raise the liquefaction temperature in the evaporator 22, which will be described later. The blower 40 is not particularly limited and any blower can be used, for example, a positive displacement blower represented by a Roots blower, or a turbo blower represented by an axial flow blower or centrifugal blower. In the exemplary embodiment shown in Figures 1A and 1B, the blower 40 is a Roots blower including a casing 41 and a pair of impellers 42A and 42B that rotate inside the casing 41. The pair of impellers 42A and 42B rotate without contacting each other, and since it is not necessary to supply internal lubricating oil to the Roots blower (blower 40), there is no risk of lubricating oil mixing with the ammonia gas G, which is the gas to be contacted. Each impeller 42A and 42B is a three-bladed impeller having three lobes 43. Alternatively, each impeller 42A and 42B may be a two-bladed impeller having a pair of lobes 43.

[0016] As shown in Figures 1A and 1B, an evaporator 22 of the refrigerator 20 is provided downstream of the blower 40. The evaporator 22 is a heat exchanger that performs heat exchange between the refrigerant R circulating in the refrigerant line 80 of the refrigerator 20 and the ammonia gas G after passing through the blower 40. The evaporator 22 liquefies the ammonia gas G using the latent heat of vaporization of the refrigerant R. As described above, the ammonia gas G flowing into the evaporator 22 is pressurized by the blower 40 on the upstream side. The ammonia gas G may be pressurized in the blower 40 to a pressure at which liquefaction in the evaporator 22 is reliably achieved.

[0017] The downstream end of the ammonia gas line 11 is connected to the inlet 23A of the ammonia gas G in the evaporator 22. Conversely, the upstream end of the liquid ammonia line 12 is connected to the outlet 23B of the liquid ammonia L in the evaporator 22. In the exemplary embodiment shown in Figures 1A and 1B, the ammonia gas line 11 includes an introduction line 11A for ammonia gas G1 (described later), an introduction line 11B for recovered ammonia gas G2, and an upstream line 11C and a downstream line 11D through which ammonia gas G (G1, G2, or a mixture thereof) flows. The upstream line 11C leads the ammonia gas G from the first cooler 30 to the blower 40, and the downstream line 11D leads the ammonia gas G from the blower 40 to the evaporator 22. In this case, the inlet 23A of the ammonia gas G in the evaporator 22 is connected to the downstream end of the downstream line 11D of the ammonia gas line 11. Note that the installation location of the introduction line 11B for recovered ammonia gas G2 in the ammonia gas line 11 differs between Figure 1A and Figure 1B.

[0018] The ammonia gas G that flows into the evaporator 22 via the ammonia gas line 11 is liquefied in the evaporator 22 and flows out of the ammonia treatment device 10 as liquid ammonia L via the liquid ammonia line 12.

[0019] In some embodiments, as shown in Figures 1A and 1B, the ammonia processing apparatus 10 (10A, 10B) includes a liquid ammonia tank 70 located downstream of the evaporator 22. The liquid ammonia tank 70 is provided downstream of the evaporator 22 in the liquid ammonia line 12. Liquid ammonia L exiting from the outlet 23B of the evaporator 22 flows into the liquid ammonia tank 70 via the liquid ammonia line 12 and is stored in the liquid ammonia tank 70. The liquid ammonia tank 70 has a sealed structure. Inside the liquid ammonia tank 70, a gas phase 72 containing ammonia gas and a liquid phase 74 containing liquid ammonia form a substantial gas-liquid equilibrium state.

[0020] In the embodiments shown in Figures 1A and 1B, the refrigerator 20 includes, in addition to the evaporator 22 configured above, a compressor 24, a condenser 26, and an expansion valve 28 as components of the refrigeration cycle. The evaporator 22, compressor 24, condenser 26, and expansion valve 28 are arranged in this order on the refrigerant line 80. In the evaporator 22, the gasified refrigerant R flows into the compressor 24 and is compressed in the compressor 24. The refrigerant R compressed in the compressor 24 condenses in the condenser 26 through heat exchange with the cooling water W. After passing through the condenser 26, the refrigerant R expands in the expansion valve 28 and is then supplied to the evaporator 22 and the first cooler 30.

[0021] In some embodiments, as shown in Figures 1A and 1B, the refrigerant line 80 includes a main line 82 and a first branch line 84, which are provided in parallel with each other between the expansion valve 28 and the compressor 24. The main line 82 is configured to guide the refrigerant R that has left the expansion valve 28 to the evaporator 22, and then return the refrigerant R that has been gasified in the evaporator 22 back to the inlet of the compressor 24. On the other hand, the first branch line 84 is configured to guide a portion of the refrigerant R that has left the expansion valve 28 to the first cooler 30, bypassing the evaporator 22, and then guide the refrigerant R that has passed through the first cooler 30 back to the compressor 24. The first branch line 84 branches off from the main line 82 at a first branching point 86 between the expansion valve 28 and the evaporator 22, and rejoins the main line 82 at a first confluence point 88 between the evaporator 22 and the compressor 24. Thus, in the embodiments shown in Figures 1A and 1B, the evaporator 22 and the first cooler 30 are connected to the refrigerant line 80 in parallel with each other.

[0022] In the embodiment shown in Figure 1A, the outlet 46 of the blower 40 is directly connected to the inlet 23A of the evaporator 22 via the ammonia gas line 11 (11D). That is, there are no other heat exchangers between the blower 40 and the evaporator 22 to cool the ammonia gas G.

[0023] In contrast, in the embodiment shown in Figure 1B, the ammonia treatment apparatus 10 includes a second cooler 50 provided between the blower 40 and the evaporator 22. Ammonia gas G that has passed through the blower 40 flows into the second cooler 50 via the ammonia gas line 11 (11D). A refrigerant R is supplied to the second cooler 50 from the refrigerator 20. The second cooler 50 cools the ammonia gas G by heat exchange with the refrigerant R. In this case, the refrigerant line 80 includes a second branch line 85 provided in parallel with the main line 82 and the first branch line 84 between the expansion valve 28 and the compressor 24. The second branch line 85 branches off from the main line 82 at a second branch point 87 between the first branch point 86 and the evaporator 22, and merges with the main line 82 at a second merge point 89 between the evaporator 22 and the first merge point 88.

[0024] The ammonia treatment apparatus 10 may include a gas-liquid separator 60 provided between the second cooler 50 and the evaporator 22. The gas-liquid separator 60 may remove condensate D2 derived from water vapor from the ammonia gas G that has passed through the second cooler 50. A drain pipe 61 may be connected to the gas-liquid separator 60. In this case, the condensate D2 is discharged outside the gas-liquid separator 60 through the drain pipe 61.

[0025] With the ammonia processing apparatus 10 (10A, 10B) configured as described above, liquid ammonia L can be obtained from ammonia gas G.

[0026] From here, we will describe a fabric processing system 1 as an example of a specific application of the ammonia processing device 10. However, the application of the ammonia processing device 10 is not limited to the fabric processing system 1.

[0027] Figure 3 is a schematic diagram of a fabric processing system according to one embodiment. The fabric processing system 1 is a device for modifying a fabric to be processed C using liquid ammonia L. By immersing the fabric to be processed C in liquid ammonia L, the fiber structure changes, and the properties of the fabric to be processed C, such as tensile strength, softness of touch, shrinkage resistance, and wrinkle resistance, can be improved.

[0028] In some embodiments, the fabric processing system 1 includes a processing tank 2 for impregnating a fabric C to be processed with liquid ammonia L, and a heating device 3 for volatilizing ammonia from the fabric C impregnated with liquid ammonia L. The fabric processing system 1 further includes a processing chamber 4 housing the processing tank 2 and the heating device 3, and a volatilization chamber 5 provided adjacent to the processing chamber 4.

[0029] The fabric to be processed C is continuously fed into the processing chamber 4 and immersed in the liquid ammonia L stored in the processing tank 2. After passing through the processing tank 2, the fabric to be processed C is heated by the heating device 3, at which point most of the liquid ammonia L impregnated in the fabric to be processed C volatilizes. After passing through the heating device 3, the fabric to be processed C is sent to the volatilization chamber 5, where it is sprayed with high-temperature steam and then discharged from the volatilization chamber 5. Any remaining liquid ammonia L in the fabric to be processed C is blown away and volatilized along with the steam in the volatilization chamber 5.

[0030] Furthermore, the internal pressure of the processing chamber 4 and the volatilization chamber 5 may be adjusted to be slightly negative compared to atmospheric pressure. This prevents leakage of ammonia gas volatilized from the liquid ammonia L in the processing chamber 4 and the volatilization chamber 5.

[0031] The fabric processing system 1 may include seal boxes 6 (6A, 6B) provided at the entrances and exits of the fabric to be processed C in the processing chamber 4 and the volatilization chamber 5 to prevent leakage of ammonia gas from the processing chamber 4 and the volatilization chamber 5. Additionally, a seal box 6 (6C) may be provided between the processing chamber 4 and the volatilization chamber 5 to prevent the movement of ammonia gas between the two chambers.

[0032] In some embodiments, the fabric processing system 1 includes an ammonia processing device 10 for obtaining liquid ammonia L from ammonia gas. The ammonia gas generated during the modification of the fabric C to be processed is liquefied by the ammonia processing device 10 and supplied again to the processing tank 2 as liquid ammonia L.

[0033] In the embodiment shown in Figure 3, the ammonia processing apparatus 10 includes an ammonia gas line 11 and a liquid ammonia line 12 connecting the processing chamber 4 and the ammonia processing apparatus 10. The ammonia gas G1 generated in the processing chamber 4 flows into the first cooler 30 via the ammonia gas line 11 and is cooled by heat exchange with the refrigerant R from the refrigerator 20. At this time, drain water D1 is removed from the ammonia gas G1. The ammonia gas G1 that exits the first cooler 30 and is pressurized by the blower 40 is liquefied in the evaporator 22 by heat exchange with the refrigerant R. The liquid ammonia L obtained by the liquefaction of the ammonia gas G1 is sent to the processing chamber 4 via the liquid ammonia line 12.

[0034] The ammonia gas G1 in the processing chamber 4 is a mixture of ammonia gas evaporated from the processing tank 2 and ammonia gas volatilized from the workpiece fabric C due to heating by the heating device 3. Although a seal box 6 is provided at the inlet of the workpiece fabric C in the processing chamber 4, the internal pressure of the processing chamber 4 is slightly negative compared to atmospheric pressure, so a small amount of air flows into the processing chamber 4. Therefore, the ammonia gas G1 contains water vapor originating from the atmosphere.

[0035] In some embodiments, the fabric processing system 1 includes a drain water treatment device 100 for recovering ammonia from drain water D1. The drain water treatment device 100 supplies the ammonia recovered from the drain water D1 as recovered ammonia gas G2 to the ammonia treatment device 10. In the embodiment shown in Figure 3, the drain water treatment device 100 is connected to the ammonia treatment device 10 by a drain pipe 31 and a recovered ammonia gas line 7. Drain water D1 is sent from the first cooler 30 to the drain water treatment device 100 via the drain pipe 31, and the ammonia contained in the drain water D1 is returned to the ammonia treatment device 10 as recovered ammonia gas G2.

[0036] The ammonia treatment device 10 is configured in the evaporator 22 to liquefy the recovered ammonia gas G2 supplied from the drain water treatment device 100 together with the ammonia gas G1. In this case, the downstream end of the recovered ammonia gas line 7 is connected to the upstream end of the introduction line 11B for the recovered ammonia gas G2.

[0037] The drain water treatment device 100 may be connected to the volatilization chamber 5 by an ammonia gas line 8. The drain water treatment device 100 may be configured to recover ammonia from the ammonia gas G3 in the volatilization chamber 5 and supply it to the ammonia treatment device 10 as recovered ammonia gas G2. The ammonia gas G3 in the volatilization chamber 5 is the liquid ammonia L that remained on the fabric C to be processed in the volatilization chamber 5 and evaporated along with water vapor, and its ammonia concentration is lower than that of ammonia gas G1. By processing two types of gases with different ammonia concentrations (ammonia gas G1 and ammonia gas G3) through separate routes, the liquefaction efficiency of ammonia gas in the entire fabric processing system 1 is improved.

[0038] In addition, the drain water treatment device 100 may be connected to the seal box 6 by a seal gas line 9. The drain water treatment device 100 may be configured to recover ammonia from the seal gas G4 from the seal box 6 and supply it to the ammonia treatment device 10 as recovered ammonia gas G2.

[0039] From here, the drain water treatment device 100 will be described in detail. Figure 4 is a schematic diagram of a drain water treatment device according to one embodiment.

[0040] In some embodiments, the drain water treatment device 100 is a device for recovering ammonia from ammonia water. The drain water treatment device 100 includes an absorption tower 101 through which ammonia water flows, a distillation tower 102 for recovering ammonia from ammonia water, and ammonia water piping 103 through which ammonia water flows between the absorption tower 101 and the distillation tower 102.

[0041] In the embodiment shown in Figure 4, drain water D1 is supplied to the absorption tower 101 from the first cooler 30 via the drain pipe 31. The drain water D1 merges with the ammonia water AW1 flowing through the absorption tower 101 and is sent to the distillation tower 102. Drain water D2 may also be supplied to the absorption tower 101 from the gas-liquid separator 60 via the drain pipe 61. Furthermore, in the absorption tower 101, ammonia gas G3 supplied via the ammonia gas line 8 and seal gas G4 supplied via the seal gas line 9 may be absorbed into the ammonia water AW1.

[0042] In the distillation column 102, aqueous ammonia AW1 is separated into ammonia gas AG and low-concentration aqueous ammonia AW2. The ammonia gas AG (recovered ammonia gas G2) flows out of the distillation column 102 via an ammonia gas pipe 104 connected to the top of the distillation column 102. The downstream end of the ammonia gas pipe 104 may be connected to the upstream end of the recovered ammonia gas line 7. The low-concentration aqueous ammonia AW2 is discharged from the bottom of the distillation column 102 and supplied to the absorption column 101 via an ammonia water pipe 103.

[0043] In the embodiment shown in Figure 4, the drain water treatment device 100 may include a condenser 105 provided on the ammonia gas piping 104. The condenser 105 may cool the ammonia gas AG from the distillation column 102 by heat exchange with the refrigerant CM to partially condense it, and return the condensed liquid, which contains a lot of water, to the internal space of the distillation column 102 as reflux liquid RL.

[0044] Note that the ammonia gas not absorbed by the aqueous ammonia AW1 in the absorption tower 101 may be sent to a decontamination device (not shown) via a decontamination pipe 106 connected to the absorption tower 101.

[0045] Organizing the characteristic configurations of the ammonia treatment apparatuses according to several of the above-described embodiments, they are as follows.

[0046] [1] The ammonia treatment apparatus (10) according to at least several embodiments of the present invention is an ammonia treatment apparatus (10) for obtaining liquid ammonia (L) from ammonia gas (G) containing water vapor, and includes a refrigerator (20) having a refrigeration cycle in which a refrigerant (R) circulates, a first cooler (30) for cooling the ammonia gas (G) by heat exchange with the refrigerant (R) and removing drain water (D1) derived from water vapor from the ammonia gas (G), and a blower (40) provided on the downstream side of the first cooler (30) for boosting the pressure of the ammonia gas (G). The refrigerator (20) has an evaporator (22) configured to evaporate the refrigerant (R) and liquefy the ammonia gas (G) by heat exchange between the refrigerant (R) and the ammonia gas (G) after passing through the blower (40).

[0047] According to the configuration of [1] above, in the first cooler (30) disposed upstream of the blower (40), moisture is removed from the ammonia gas (G) as drain water (D1) before flowing into the blower (40), so that a decrease in the pressure boosting efficiency of the ammonia gas (G) in the blower (40) can be suppressed. Also, in the first cooler (30), since the ammonia gas (G) is cooled by heat exchange with the refrigerant, the blower (40) can be stably operated by lowering the gas temperature before blower suction and suppressing an increase in the blower outlet temperature.

[0048] [2] In some embodiments, in the configuration of [1] above, a second cooler (50) is provided between the blower (40) and the evaporator (22) for cooling the ammonia gas (G) by heat exchange with the refrigerant (R).

[0049] According to the configuration described in [2] above, the ammonia gas (G) discharged from the blower (40) can be cooled in the second cooler (50), thus reducing the size of the first cooler (30). Furthermore, the ammonia gas (G) cooled in the second cooler (50) can be further treated to remove water vapor-derived drain water (D2) using, for example, a gas-liquid separator (60) downstream of the second cooler (50).

[0050] [3] A fabric processing system (1) according to at least some embodiments comprises: a processing tank (2) for impregnating a fabric to be processed (C) with liquid ammonia (L) supplied from an evaporator (22); a heating device (3) for volatilizing the liquid ammonia (L) impregnated in the fabric to be processed (C); and an ammonia processing device (10) as described in [1] or [2] above.

[0051] According to the configuration described in [3] above, the ammonia gas (G) generated in the processing tank (2) and the heating device (3) can be liquefied in the ammonia treatment device (10) and supplied back to the processing tank (2). This reduces the disposal costs that would otherwise be incurred if the ammonia gas (G) were not reused and instead disposed of, thereby lowering the running costs of the fabric processing system (1).

[0052] [4] In some embodiments, the configuration of [3] above is further provided with a drain water treatment device (100) for recovering ammonia from drain water (D1) and supplying it to an ammonia treatment device (10) as recovered ammonia gas (G2), wherein the ammonia treatment device (10) is configured in an evaporator (22) to liquefy the recovered ammonia gas (G2) supplied from the drain water treatment device (100) together with ammonia gas (G).

[0053] According to the configuration described in [4] above, liquid ammonia (L) can be obtained from drain water (D1), which is ammonia water. This reduces the disposal costs that would otherwise be incurred if the drain water (D1) were not reused and is instead discarded, thereby lowering the running costs of the fabric processing system (1).

[0054] In this specification, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" shall not only describe such arrangements strictly, but also describe states of relative displacement with tolerances or angles or distances that allow for the same function to be achieved. For example, expressions describing things being in an equal state such as "identical," "equal," and "homogeneous" shall not only describe states of being strictly equal, but also describe states where tolerances or differences exist that allow for the same function to be achieved. Furthermore, in this specification, expressions describing shapes such as quadrilaterals or cylindrical shapes shall not only describe geometrically precise quadrilaterals or cylindrical shapes, but also describe shapes that include concave and concave parts, chamfered parts, etc., to the extent that the same effect can be achieved. In addition, in this specification, expressions such as "equipped," "possessed," "possess," "include," or "have" a single component are not exclusive expressions that exclude the existence of other components.

[0055] 1: Fabric processing system 2: Processing tank 3: Heating device 10: Ammonia processing device 20: Refrigerator 22: Evaporator 30: First cooler 40: Blower 50: Second cooler 100: Drain water processing device C: Fabric to be processed D1: Drain water G: Ammonia gas G2: Recovered ammonia gas L: Liquid ammonia R: Ammonia refrigerant

Claims

1. An ammonia treatment apparatus for obtaining liquid ammonia from ammonia gas containing water vapor, comprising: a refrigerator having a refrigeration cycle in which a refrigerant is circulated; a first cooler for cooling the ammonia gas by heat exchange with the refrigerant and removing drain water originating from the water vapor from the ammonia gas; and a blower provided downstream of the first cooler for pressurizing the ammonia gas, wherein the refrigerator has an evaporator configured to evaporate the refrigerant and liquefy the ammonia gas by heat exchange between the refrigerant and the ammonia gas after it has passed through the blower.

2. The ammonia treatment apparatus according to claim 1, further comprising a second cooler provided between the blower and the evaporator for cooling the ammonia gas by heat exchange with the refrigerant.

3. A fabric processing system comprising: a processing tank for impregnating a fabric to be processed with liquid ammonia supplied from the evaporator; a heating device for volatilizing the liquid ammonia impregnated in the fabric to be processed; and the ammonia processing apparatus according to claim 1 or 2.

4. The fabric processing system according to claim 3, comprising a drain water treatment device for recovering ammonia from the drain water and supplying it to the ammonia treatment device as recovered ammonia gas, wherein the ammonia treatment device is configured in the evaporator to liquefy the recovered ammonia gas supplied from the drain water treatment device together with the ammonia gas.

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